CN110797601B - Charging control method, device, terminal device and storage medium - Google Patents
Charging control method, device, terminal device and storage medium Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The application discloses a charging control method, a charging control device, terminal equipment and a storage medium, wherein the method comprises the following steps: detecting the direct current impedance of the battery; setting a charging cut-off voltage of a constant current charging stage during secondary charging according to the detected direct current impedance and the charging cut-off current of the battery; and charging the battery according to the set charge cut-off voltage. This application is through the impedance change of tracking the battery, adjusts the charging parameter in real time, will charge cutoff voltage and impedance relevance and get into consideration, when impedance increases, also corresponding improvement charge cutoff voltage to the problem that the battery is longer and longer along with ageing aggravation charge time has been solved.
Description
Technical Field
The present application relates to the field of charging technologies, and in particular, to a charging control method and apparatus, a terminal device, and a storage medium.
Background
At present, the conventional charging scheme of the battery is a charging mode of constant current and constant voltage, and the charging scheme is constant in the whole life cycle of the product. In the conventional charging scheme of the constant current and the constant voltage, because the charging process is solidified in the whole charging process, the charging time is longer and longer due to gradual aging of the battery in the actual use process.
Disclosure of Invention
The present application mainly aims to provide a charging control method, apparatus, terminal device and storage medium, and aims to solve the problem that the charging time of a battery is longer and longer as the battery ages.
In order to achieve the above object, the present application provides a charging control method, including:
detecting the direct current impedance of the battery;
setting a charging cut-off voltage of a constant current charging stage during secondary charging according to the detected direct current impedance and the charging cut-off current of the battery;
and charging the battery according to the set charge cut-off voltage.
Optionally, the step of setting a charge cut-off voltage in the constant current charging stage when charging is performed again according to the detected dc impedance of the battery and the charge cut-off current further includes:
acquiring the charging time length of the last charging or the charging time length of continuous multiple charging before the next charging;
if the charging time length during the last charging or the charging time length during continuous charging for multiple times before the second charging is greater than a preset time length threshold value, executing the following steps: and setting the charging cut-off voltage of the constant current charging stage during secondary charging according to the detected direct current impedance of the battery and the charging cut-off current.
Optionally, the step of charging the battery according to the set charge cut-off voltage further includes:
the charging time length of the current charging is detected as a charging time length reference for setting the charging cutoff voltage at the next charging.
Optionally, the charge control method further includes:
and updating the preset time length threshold according to the detected charging time length of the current charging.
Optionally, the step of setting a charge cut-off voltage of the constant current charging stage at the time of the secondary charging according to the detected dc impedance of the battery and the charge cut-off current includes:
setting the charging cut-off voltage of the constant current charging stage when charging at the time as Vn +1 ═ Vo + I × Rn, wherein Vn +1 is the charging cut-off voltage of the constant current charging stage when charging at the time, I is the charging cut-off current, Vo is the charging cut-off voltage when charging at the first time, and Rn is the detected direct current impedance of the battery.
Optionally, before the step of detecting the dc impedance of the battery, the method further includes:
and detecting the direct current impedance of the battery at the end of the last charging.
Optionally, the charging control method is applied to a preset fast charging mode and/or a preset normal charging mode.
In addition, this embodiment also proposes a charge control device, which includes:
the detection module is used for detecting the direct current impedance of the battery;
the setting module is used for setting the charging cut-off voltage of the constant current charging stage during secondary charging according to the detected direct current impedance and the charging cut-off current of the battery;
and the charging module is used for charging the battery according to the set charging cut-off voltage.
In addition, an embodiment of the present application further provides a terminal device, where the terminal device includes a memory, a processor, and a charging control program that is stored on the memory and is executable on the processor, and the charging control program implements the steps of the charging control method described above when executed by the processor.
Furthermore, an embodiment of the present application also provides a computer-readable storage medium, where a charging control program is stored, and the charging control program, when executed by a processor, implements the steps of the charging control method as described above.
The charging control method, the charging control device, the terminal equipment and the storage medium provided by the embodiment of the application detect the direct current impedance of the battery; setting a charging cut-off voltage of a constant current charging stage during secondary charging according to the detected direct current impedance and the charging cut-off current of the battery; and charging the battery according to the set charge cut-off voltage. Therefore, the charging parameters are adjusted in real time by tracking the impedance change of the battery, the charging cut-off voltage and the impedance are considered in a correlation mode, and when the impedance is increased, the charging cut-off voltage is correspondingly increased, so that the problem that the charging time of the battery is longer and longer along with the aging aggravation is solved.
Drawings
Fig. 1 is a schematic diagram of functional modules of a terminal device to which a charging control apparatus of the present application belongs;
FIG. 2 is a schematic flow chart diagram illustrating an exemplary embodiment of a charging control method of the present application;
fig. 3 is a schematic diagram of a charging circuit according to an embodiment of the charging control method of the present application;
FIG. 4 is a schematic flow chart diagram illustrating another exemplary embodiment of a charging control method of the present application;
FIG. 5 is a schematic flow chart diagram illustrating a charge control method according to yet another exemplary embodiment of the present application;
fig. 6 is a flowchart illustrating a charging control method according to another exemplary embodiment of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The main solution of the embodiment of the application is as follows: detecting the direct current impedance of the battery; setting a charging cut-off voltage of a constant current charging stage during secondary charging according to the detected direct current impedance and the charging cut-off current of the battery; and charging the battery according to the set charge cut-off voltage. Therefore, the charging parameters are adjusted in real time by tracking the impedance change of the battery, the charging cut-off voltage and the impedance are considered in a correlation mode, and when the impedance is increased, the charging cut-off voltage is correspondingly increased, so that the problem that the charging time of the battery is longer and longer along with the aging aggravation is solved.
The embodiment of the application considers the impedance change of the battery in the using process, and for a general battery, the impedance of the battery can be gradually increased in the using process, so that the floating pressure of the battery is higher.
Based on this, the embodiment of the present application proposes a solution, in which the charging cut-off voltage and the impedance are considered in a correlated manner, and when the impedance increases, the charging cut-off voltage is also correspondingly increased, so as to solve the problem that the charging time of the battery is longer and longer as the aging progresses.
Specifically, referring to fig. 1, fig. 1 is a schematic diagram of functional modules of a terminal device to which the charging control apparatus of the present application belongs. The charging control device may be a device capable of performing charging control independently of the terminal device, and may be carried on the terminal device in the form of hardware or software. This terminal equipment can be intelligent mobile terminal such as cell-phone, panel computer, still can be with charge intelligent electronic equipment such as portable power source, notebook computer, unmanned aerial vehicle, electronic book, electron cigarette to and wrist-watch, bracelet, intelligent glasses, robot of sweeping floor, or other small-size electronic products, for example, wireless earphone, bluetooth stereo set, electric toothbrush, chargeable wireless mouse etc..
In this embodiment, the terminal device to which the charging control apparatus belongs at least includes an output module 110, a first processor 120, a first memory 130, and a first communication module 140.
The first memory 130 stores therein a first operating system and a charging control program, and the charging control device may store in the first memory 130 the acquired dc impedance of the battery detected at the end of the last charging; the output module 110 may be a display screen, a speaker, etc., and the display screen may display the charging state of the battery during the charging process. The first communication module 140 may include a WIFI module, a mobile communication module, a bluetooth module, and the like, and communicates with an external device or a server through the first communication module 140.
Wherein, the charging control program in the first memory 130 realizes the following steps when being executed by the processor:
detecting the direct current impedance of the battery;
and setting the charging cut-off voltage of the constant current charging stage during secondary charging according to the detected direct current impedance of the battery and the charging cut-off current.
Further, the charging control program in the first memory 130, when executed by the processor, further implements the following steps:
acquiring the charging time length of the last charging or the charging time length of continuous multiple charging before the next charging;
if the charging time length during the last charging or the charging time length during continuous charging for multiple times before the second charging is greater than a preset time length threshold value, executing the following steps: and setting the charging cut-off voltage of the constant current charging stage during secondary charging according to the detected direct current impedance of the battery and the charging cut-off current.
Further, the charging control program in the first memory 130, when executed by the processor, further implements the following steps:
the charging time length of the current charging is detected as a charging time length reference for setting the charging cutoff voltage at the next charging.
Further, the charging control program in the first memory 130, when executed by the processor, further implements the following steps:
and updating the preset time length threshold according to the detected charging time length of the current charging.
Further, the charging control program in the first memory 130, when executed by the processor, further implements the following steps:
setting the charging cut-off voltage of the constant current charging stage when charging at the time as Vn +1 ═ Vo + I × Rn, wherein Vn +1 is the charging cut-off voltage of the constant current charging stage when charging at the time, I is the charging cut-off current, Vo is the charging cut-off voltage when charging at the first time, and Rn is the detected direct current impedance of the battery.
Further, the charging control program in the first memory 130, when executed by the processor, further implements the following steps:
and detecting the direct current impedance of the battery at the end of the last charging.
According to the scheme, the direct current impedance of the battery is detected; setting a charging cut-off voltage of a constant current charging stage during secondary charging according to the detected direct current impedance and the charging cut-off current of the battery; and charging the battery according to the set charge cut-off voltage. Therefore, the charging parameters are adjusted in real time by tracking the impedance change of the battery, the charging cut-off voltage and the impedance are considered in a correlation mode, and when the impedance is increased, the charging cut-off voltage is correspondingly increased, so that the problem that the charging time of the battery is longer and longer along with the aging aggravation is solved.
The embodiments of the method of the present application are proposed based on the architecture of the terminal device, but not limited to the architecture of the terminal device.
Referring to fig. 2, fig. 2 is a flowchart illustrating an exemplary embodiment of a charging control method according to the present application. In this embodiment, the proposed charge control method includes:
step S101, detecting the direct current impedance of a battery;
in the scheme of the embodiment, the charging cut-off voltage and the impedance are considered in a correlation mode, and when the impedance is increased, the charging cut-off voltage is correspondingly increased, so that the problem that the charging time of the battery is longer and longer along with the aging is solved.
First, the dc impedance of the battery is detected. When detecting the dc impedance of the battery, the following scheme may be adopted:
and detecting a voltage difference delta U and a current difference delta I before and after the charging of the battery is finished, wherein the direct current impedance is equal to the ratio of the voltage difference delta U to the current difference delta I. Examples are as follows:
when the charging is finished, the current voltage of the battery is detected to be 4.45V and the current is detected to be 0.5A (constant current charging stage), then the current is removed, the voltage of the battery is detected to be 4.43V and the current is detected to be 0, the voltage difference Δ U before and after the charging of the battery is finished is 4.45-4.43-0.02, the current difference Δ I is 0.5-0-0.5, and the direct current impedance of the battery is as follows: 0.02/0.5 ═ 0.04 Ω.
The detection of the dc impedance is performed in the charging end link, and of course, in other embodiments, the detection of the dc impedance may also be performed in the charging intermediate stage or the discharging stage, two time nodes are selected, the voltage difference Δ U and the current difference Δ I of the two time nodes are obtained, and the dc impedance is equal to the ratio of the voltage difference Δ U to the current difference Δ I.
Therefore, as an embodiment, the dc impedance of the battery may be detected at the end of the last charge.
When the battery is charged next time, the direct-current impedance of the battery detected at the end of the last charge is acquired so as to set the charge cutoff voltage at the time of the next charge according to the direct-current impedance of the battery detected at the end of the last charge.
As another embodiment, the dc impedance of the battery may also be detected when the battery is being recharged.
Step S102, setting a charging cut-off voltage during secondary charging according to the detected direct current impedance and the charging cut-off current of the battery;
here, the charge cut-off voltage (limited charge voltage) is a charge voltage at which a constant current charge end of the battery is reached in a predetermined constant current charge period.
Specifically, the charging cut-off voltage during the secondary charging is set to be Vn +1 ═ Vo + I × Rn, where Vn +1 is the charging cut-off voltage during the constant-current charging phase during the secondary charging, I is the charging cut-off current during the constant-current charging phase, Vo is the charging cut-off voltage during the constant-current charging phase during the primary charging, the primary charging refers to the situation that the battery is first charged when the battery leaves the factory, and Rn is the dc impedance of the battery detected when the last charging is finished.
Examples are as follows:
assuming that the charging cut-off voltage in the constant current charging stage is Vn during the nth charging, and the direct current impedance of the battery is detected to be Rn when the nth charging is finished. Then, at the n +1 th charging, the cut-off voltage of the charging is set to Vn +1 ═ Vo + I × Rn, where I is the charging cut-off current of the constant current charging phase and Vo is the cut-off voltage of the constant current charging phase at the time of the first charging.
And step S103, charging the battery according to the set charge cut-off voltage.
After the charge cutoff voltage is set, the battery is charged according to the set charge cutoff voltage.
According to the scheme, the direct current impedance of the battery is detected; setting a charging cut-off voltage of a constant current charging stage during secondary charging according to the detected direct current impedance and the charging cut-off current of the battery; and charging the battery according to the set charge cut-off voltage. Therefore, the charging parameters are adjusted in real time by tracking the impedance change of the battery, the charging cut-off voltage and the impedance are considered in a correlation mode, and when the impedance is increased, the charging cut-off voltage is correspondingly increased, so that the problem that the charging time of the battery is longer and longer along with the aging aggravation is solved.
It should be noted that the charging control method of the present embodiment may be applied to a preset fast charging mode (such as a large current fast charging mode and a large voltage fast charging mode) and/or a preset normal charging mode. For example, a circuit compatible with fast charging and normal charging is provided on the electronic device side, as shown in fig. 3, fig. 3 is a schematic diagram of a charging circuit structure of the electronic device, the circuit structure relates to a power adapter and the electronic device, the power adapter is electrically connected with the electronic device to charge the electronic device, and the power adapter side includes: the isolation transformer circuit is respectively electrically connected with the rectification filter circuit and the main control module, and the rectification filter circuit is connected with commercial power to carry out rectification filtering on the accessed commercial power.
On the electronic equipment side, a circuit compatible with quick charging and ordinary charging is provided, the circuit comprising: the charging IC is connected with an isolation transformation circuit of the power adapter, the charging IC is further connected with the main control module and the battery respectively, one end of the switch is connected between the isolation transformation circuit and the charging IC, the other end of the switch is connected with the battery, and meanwhile, the switch is further connected with the main control module and is controlled to be closed and disconnected by the main control module. If high voltage fast charge or normal charge is used, the switch is off and the charging path may be through the charging IC to the battery, as shown in fig. 3. If the high-current quick charging is carried out, a direct charging structure is adopted, the switch is closed, and the charging path can directly reach the battery after passing through the switch. In addition, the scheme of the embodiment can also be used in wireless charging.
Referring to fig. 4, fig. 4 is a flowchart illustrating another exemplary embodiment of the charging control method of the present application. This embodiment is based on the embodiment shown in fig. 2, in which before setting the charge cutoff voltage in the constant current charging phase at the time of secondary charging according to the detected dc impedance of the battery and the charge cutoff current at step S102, the method further includes:
step S1021, acquiring the charging time length of the last charging or the charging time length of continuous multiple charging before the next charging;
step S1022, determining whether the charging time length during the last charging or the charging time length during continuous multiple charging before the next charging is greater than a preset time length threshold; if the charging time length during the last charging or the charging time length during continuous multiple charging before the second charging is greater than the preset time length threshold, executing step S102: and setting the charging cut-off voltage of the constant current charging stage during secondary charging according to the detected direct current impedance of the battery and the charging cut-off current.
In contrast to the embodiment shown in fig. 2 described above, the present embodiment also considers the charging period as one of the trigger conditions for setting the charging cutoff voltage.
Specifically, since the charging period becomes long as the battery impedance increases with the increase in the use time, the charging period can be detected every time charging. The charging time length is changed mainly in a constant voltage stage in the charging process.
In the present embodiment, the charging period may be, for example, a period of charging to a cutoff voltage, or a period of detecting that the battery is fully charged (whether it is fully charged can be judged by detecting the capacity).
As an implementation manner, acquiring a charging time length of the last charging, and judging whether the charging time length of the last charging is greater than a preset time length threshold value; and if the charging time length during the last charging is greater than the preset time length threshold value, setting the charging cut-off voltage during the second charging according to the detected direct current impedance of the battery at the end of the last charging, namely setting the charging cut-off voltage to be Vn +1 ═ Vo + Rn.
The preset time threshold value can be set according to actual conditions. For example, if the charging time of the new battery is 30 minutes, the preset charging time threshold value for the aged battery may be increased by 15-20 minutes on the basis of 30 minutes, and if the preset charging time threshold value is exceeded, the charging cutoff voltage at the time of secondary charging is set according to the direct current impedance of the battery.
Alternatively, as another embodiment, the charging time period when a plurality of times of charging are continued before the sub-charging is acquired. Judging whether the charging time length of continuous multiple charging before secondary charging is greater than a preset time length threshold value or not; and if the charging time is higher than the preset time threshold value continuously for the preset times, setting the charging cut-off voltage as Vn + 1-Vo + I-Rn.
Therefore, by combining the change condition of the charging time, the charging cut-off voltage is not required to be set every time of charging, so that the flexibility of battery charging control can be improved, and the control complexity is reduced.
In the above embodiment, when the charge cut-off voltage is changed once, the charge time period needs to be updated. The updated charging period may be a charging period detected (recorded) after the first adjustment of the charge cut-off voltage. Subsequent charging duration comparisons need to be performed on the basis of the updated charging duration. When the charging time is longer than the previous preset time threshold, the preset time threshold also needs to be readjusted, for example, the preset time threshold is increased according to a certain proportion on the basis of updating the previous preset time threshold. For example, after the charging cutoff voltage is adjusted for the first time, the set preset time threshold is 35 minutes, and when the charging time for the next time is higher than the previous preset time threshold (35), 15 minutes is added on the basis of 35 minutes to set a new preset time threshold, and if the charging time for the next time is lower than the previous preset time threshold (35), no adjustment is needed.
According to the scheme, the direct current impedance of the battery is detected; acquiring the charging time length of the last charging or the charging time length of continuous multiple charging before the second charging, and setting the charging cut-off voltage of the second charging according to the detected direct-current impedance and the charging cut-off current of the battery if the charging time length of the last charging or the charging time length of the continuous multiple charging before the second charging is greater than a preset time length threshold; and charging the battery according to the set charge cut-off voltage. Therefore, the charging parameters are adjusted in real time by tracking the impedance change of the battery, the charging cut-off voltage and the impedance are considered in a correlation mode, and when the impedance is increased, the charging cut-off voltage is correspondingly increased, so that the problem that the charging time of the battery is longer and longer along with the aging aggravation is solved.
Referring to fig. 5, fig. 5 is a flowchart illustrating a charging control method according to still another exemplary embodiment of the present application. This embodiment is based on the embodiment shown in fig. 4 described above, and in this embodiment, after the step S103 described above, the method further includes:
and step S104, detecting the charging time length of the current charging as a charging time length reference for setting the charging cut-off voltage in the next charging.
Compared with the embodiment shown in fig. 4, the present embodiment further includes a scheme of detecting the charging time period of the current charging.
Specifically, the present embodiment determines whether to adjust the charge cut-off voltage of the current charge according to the historical charge time period. Therefore, when changing the charge cut-off voltage for one time, it is necessary to update the charge period as a charge period reference for setting the charge cut-off voltage at the time of the next charge. The updated charging period may be a charging period detected (recorded) after the first adjustment of the charge cut-off voltage. Subsequent charging duration comparisons need to be performed on the basis of the updated charging duration. When the charging time length is higher than the previous preset time length threshold, the preset time length threshold also needs to be readjusted, for example, the preset time length threshold is increased according to a certain proportion on the basis of updating the previous preset time length threshold. For example, after the charging cutoff voltage is adjusted for the first time, the set preset time threshold is 35 minutes, and when the charging time for the next time is higher than the previous preset time threshold (35), 15 minutes is added on the basis of 35 minutes to set a new preset time threshold, and if the charging time for the next time is lower than the previous preset time threshold (35), no adjustment is needed.
Referring to fig. 6, fig. 6 is a flowchart illustrating a charging control method according to another exemplary embodiment of the present application. This embodiment is based on the embodiment shown in fig. 5 described above, in which after detecting the charging period of the time charging as the charging period reference for setting the charging cutoff voltage at the next charging in step S104 described above, the charging control method further includes:
and step S105, updating the preset time length threshold according to the detected charging time length of the current charging.
Compared with the embodiment shown in fig. 5, the present embodiment further includes a scheme of updating the preset duration threshold.
Specifically, the preset time period threshold is adjusted mainly in consideration of that the charging time period is gradually increased after the battery is aged, and therefore, the preset time period threshold needs to be updated according to the charging time period.
In a specific implementation, the charging duration of the secondary charging is detected, and when the charging duration is higher than the previous preset duration threshold, the preset duration threshold needs to be readjusted, for example, the preset duration threshold is increased in a certain proportion on the basis of updating the previous preset duration threshold. For example, after the charging cutoff voltage is adjusted for the first time, the set preset time threshold is 35 minutes, and when the charging time for the next time is higher than the previous preset time threshold (35), 15 minutes is added on the basis of 35 minutes to set a new preset time threshold, and if the charging time for the next time is lower than the previous preset time threshold (35), no adjustment is needed.
According to the scheme, the direct current impedance of the battery is detected; acquiring the charging time length of the last charging or the charging time length of continuous multiple charging before the second charging, and setting the charging cut-off voltage of the second charging according to the detected direct-current impedance and the charging cut-off current of the battery if the charging time length of the last charging or the charging time length of the continuous multiple charging before the second charging is greater than a preset time length threshold; and charging the battery according to the set charge cut-off voltage. Therefore, by tracking the impedance change of the battery, the charging parameters are adjusted in real time, the charging cut-off voltage and the impedance are considered in a correlation manner, and when the impedance is increased, the charging cut-off voltage is correspondingly increased, so that the problem that the charging time of the battery is longer and longer along with the aging aggravation is solved; in addition, the preset time threshold is adjusted according to the charging time, so that the accuracy of battery charging control is further improved, and the charging time is reduced.
In addition, an embodiment of the present application further provides a charge control device, where the charge control device includes:
the detection module is used for detecting the direct current impedance of the battery;
a setting module for setting a charge cut-off voltage at the time of secondary charging according to the detected DC impedance of the battery;
and the charging module is used for charging the battery according to the set charging cut-off voltage.
For the principle and implementation process of implementing charging control in this embodiment, please refer to the above embodiments, which are not described herein again.
In addition, the present application further provides a terminal device, where the terminal device includes a memory, a processor, and a charging control program stored in the memory and capable of running on the processor, and the charging control program, when executed by the processor, implements the steps of the charging control method according to the foregoing embodiment.
Since the charging control program is executed by the processor, all technical solutions of all the embodiments are adopted, so that at least all the advantages brought by all the technical solutions of all the embodiments are achieved, and details are not repeated herein.
In addition, an embodiment of the present application further provides a computer-readable storage medium, where a charging control program is stored, and the charging control program, when executed by a processor, implements the steps of the charging control method according to the above embodiment.
Since the charging control program is executed by the processor, all technical solutions of all the embodiments are adopted, so that at least all the advantages brought by all the technical solutions of all the embodiments are achieved, and details are not repeated herein.
Compared with the prior art, the charging control method, the charging control device, the terminal equipment and the storage medium provided by the embodiment of the application detect the direct current impedance of the battery; setting a charge cutoff voltage at the time of secondary charging according to the detected dc impedance of the battery; and charging the battery according to the set charge cut-off voltage. Therefore, the charging parameters are adjusted in real time by tracking the impedance change of the battery, the charging cut-off voltage and the impedance are considered in a correlation mode, and when the impedance is increased, the charging cut-off voltage is correspondingly increased, so that the problem that the charging time of the battery is longer and longer along with the aging aggravation is solved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
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 (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, a controlled terminal, or a network device) to execute the method of each embodiment of the present application.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (8)
1. A charge control method, comprising:
detecting the direct current impedance of the battery;
acquiring the charging time length of the last charging or the charging time length of continuous multiple charging before the next charging;
if the charging time length during the last charging or the charging time length during continuous multiple charging before the secondary charging is greater than a preset time length threshold value, setting the charging cut-off voltage of the constant-current charging stage during the secondary charging to be Vn +1 ═ Vo + I × Rn, wherein Vn +1 is the charging cut-off voltage of the constant-current charging stage during the secondary charging, I is the charging cut-off current, Vo is the charging cut-off voltage during the primary charging, and Rn is the detected direct-current impedance of the battery; wherein Rn is ═ Δ U/Δi, Δ U is a voltage difference before and after the end of charging of the battery, and Δ I is a current difference before and after the end of charging of the battery;
and charging the battery according to the set charge cut-off voltage.
2. The charge control method according to claim 1, wherein the step of charging the battery according to the set charge cut-off voltage is further followed by:
the charging time length of the current charging is detected as a charging time length reference for setting the charging cutoff voltage at the next charging.
3. The charge control method according to claim 2, characterized by further comprising:
and updating the preset time length threshold according to the detected charging time length of the current charging.
4. The charge control method according to any one of claims 1 to 3, characterized by further comprising, before the step of detecting the direct-current impedance of the battery:
and detecting the direct current impedance of the battery at the end of the last charging.
5. The charge control method according to any one of claims 1 to 3, wherein the charge control method is applied to a preset fast charge mode and/or a preset normal charge mode.
6. A charge control device, characterized by comprising:
the detection module is used for detecting the direct current impedance of the battery;
the device comprises a setting module, a detection module and a control module, wherein the setting module is used for obtaining the charging time length of the last charging or the charging time length of continuous multiple charging before the last charging, and if the charging time length of the last charging or the charging time length of continuous multiple charging before the second charging is greater than a preset time length threshold, the charging cut-off voltage of the constant-current charging stage when the second charging is set to be Vn + 1-Vo + I Rn, wherein Vn +1 is the charging cut-off voltage of the constant-current charging stage when the second charging is carried out, I is the charging cut-off current, Vo is the charging cut-off voltage when the first charging is carried out, and Rn is the detected direct-current impedance of the battery; wherein Rn is ═ Δ U/Δi, Δ U is a voltage difference before and after the end of charging of the battery, and Δ I is a current difference before and after the end of charging of the battery;
and the charging module is used for charging the battery according to the set charging cut-off voltage.
7. A terminal device, characterized in that the terminal device comprises a memory, a processor and a charging control program stored on the memory and executable on the processor, the charging control program, when executed by the processor, implementing the steps of the charging control method according to any one of claims 1-5.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a charging control program that, when executed by a processor, implements the steps of the charging control method according to any one of claims 1-5.
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| CN201911180151.9A CN110797601B (en) | 2019-11-26 | 2019-11-26 | Charging control method, device, terminal device and storage medium |
| PCT/CN2020/125396 WO2021103932A1 (en) | 2019-11-26 | 2020-10-30 | Charging control method and apparatus, terminal device, and storage medium |
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| CN110911770B (en) * | 2019-11-26 | 2023-06-27 | Oppo广东移动通信有限公司 | Charging method and equipment to be charged |
| CN110797601B (en) * | 2019-11-26 | 2021-04-16 | Oppo广东移动通信有限公司 | Charging control method, device, terminal device and storage medium |
| CN111446750B (en) * | 2020-03-27 | 2024-03-01 | Oppo广东移动通信有限公司 | Battery charging method and device, electronic equipment and storage medium |
| CN111384757B (en) * | 2020-04-08 | 2022-06-14 | Oppo广东移动通信有限公司 | Charging method, device, equipment and storage medium |
| CN111416412B (en) * | 2020-04-20 | 2022-03-15 | Oppo广东移动通信有限公司 | Charging control method and device and terminal equipment |
| CN111509800B (en) * | 2020-04-22 | 2023-09-29 | 歌尔科技有限公司 | Charging method and system, charging box and Bluetooth headset |
| CN114388911B (en) * | 2020-10-16 | 2024-08-13 | Oppo广东移动通信有限公司 | Charging method, electronic device, and readable storage medium |
| CN112542868B (en) * | 2020-11-27 | 2023-05-23 | Oppo广东移动通信有限公司 | Charging control circuit, method and system and electronic equipment |
| CN114665527B (en) * | 2020-12-23 | 2024-11-19 | 宁德新能源科技有限公司 | Battery pack charging control method, electronic device and storage medium |
| CN112769201B (en) * | 2021-03-18 | 2023-06-13 | 维沃移动通信有限公司 | Charging method, charging device, electronic apparatus, and readable storage medium |
| CN112910054B (en) * | 2021-03-18 | 2024-06-04 | 维沃移动通信有限公司 | Charging circuit, charging device, electronic apparatus, and charging control method |
| CN112994185B (en) * | 2021-04-23 | 2024-08-27 | Oppo广东移动通信有限公司 | Charging control method and device, electronic equipment and storage medium |
| CN117310507B (en) * | 2023-11-29 | 2024-03-29 | 上海泰矽微电子有限公司 | Charging cut-off current estimation method, device, equipment and medium |
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