CN112242726A - Charging method and device - Google Patents
Charging method and device Download PDFInfo
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- CN112242726A CN112242726A CN201910656874.5A CN201910656874A CN112242726A CN 112242726 A CN112242726 A CN 112242726A CN 201910656874 A CN201910656874 A CN 201910656874A CN 112242726 A CN112242726 A CN 112242726A
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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
- 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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Abstract
The disclosure relates to a charging method and apparatus. The method comprises the following steps: detecting the battery voltage of a battery when the battery is subjected to constant current charging; when the voltage of the battery reaches an initial constant voltage, performing constant voltage charging on the battery for at least two times, wherein the initial constant voltage is greater than a safe cut-off voltage; the voltage of each constant voltage charging is smaller than that of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage. This technical scheme can promote the speed of charging greatly, reduces the charge time.
Description
Technical Field
The present disclosure relates to the field of battery technologies, and in particular, to a charging method and apparatus.
Background
At present, an electronic product conventionally uses a lithium battery for power supply, generally, a charging process of the lithium battery firstly carries out constant current charging, and when the voltage of the battery reaches a safe cut-off voltage, a constant voltage charging stage is entered, so that the charging current is reduced, and a constant charging voltage is maintained, thereby achieving the effect of full charging.
Disclosure of Invention
The embodiment of the disclosure provides a charging method and a charging device. The technical scheme is as follows:
according to a first aspect of the embodiments of the present disclosure, there is provided a charging method, including:
detecting the battery voltage of a battery when the battery is subjected to constant current charging;
when the voltage of the battery reaches an initial constant voltage, performing constant voltage charging on the battery for at least two times, wherein the initial constant voltage is greater than a safe cut-off voltage;
the voltage of each constant voltage charging is smaller than that of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage.
In one embodiment, the performing at least two constant voltage charges on the battery includes:
detecting a current at the time of the nth constant voltage charging when the battery is subjected to the nth constant voltage charging;
when the current In the nth constant voltage charging is reduced to In, carrying out (n + 1) th constant voltage charging on the battery; the voltage of the (n + 1) th constant voltage charging is smaller than the voltage of the (n) th constant voltage charging and is larger than or equal to the safety cut-off voltage, and n is an integer larger than or equal to 1.
In one embodiment, a voltage difference between the initial constant voltage and the safety cutoff voltage ranges from 20mv to 100 mv.
In one embodiment, the constant current charging the battery comprises:
and performing constant current charging on the battery for at least two times, wherein the current of each constant current charging is smaller than that of the previous constant current charging.
In one embodiment, the method further comprises:
acquiring the battery model of the battery;
and determining the safe cut-off voltage and the initial constant voltage corresponding to the battery according to the corresponding relationship among the pre-stored battery model, the safe cut-off voltage and the initial constant voltage.
According to a second aspect of the embodiments of the present disclosure, there is provided a charging device including:
the detection module is used for detecting the battery voltage of the battery when the battery is subjected to constant current charging;
the constant voltage module is used for performing constant voltage charging on the battery at least twice when the voltage of the battery reaches an initial constant voltage, wherein the initial constant voltage is greater than a safe cut-off voltage;
the voltage of each constant voltage charging is smaller than that of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage.
In one embodiment, the constant voltage module includes:
the detection submodule is used for detecting the current during the nth constant voltage charging when the nth constant voltage charging is carried out on the battery;
the constant voltage submodule is used for carrying out (n + 1) th constant voltage charging on the battery when the current In the nth constant voltage charging is reduced to In; the voltage of the (n + 1) th constant voltage charging is smaller than the voltage of the (n) th constant voltage charging and is larger than or equal to the safety cut-off voltage, and n is an integer larger than or equal to 1.
In one embodiment, a voltage difference between the initial constant voltage and the safety cutoff voltage ranges from 20mv to 100 mv.
In one embodiment, the apparatus comprises:
and the constant current module is used for performing constant current charging on the battery for at least two times, wherein the current of each constant current charging is smaller than that of the previous constant current charging.
In one embodiment, the apparatus further comprises:
the acquisition module is used for acquiring the battery model of the battery;
and the determining module is used for determining the safe cut-off voltage and the initial constant voltage corresponding to the battery according to the corresponding relationship among the pre-stored battery model, the safe cut-off voltage and the initial constant voltage.
According to a third aspect of the embodiments of the present disclosure, there is provided a charging device including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the steps of the above method.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium storing computer instructions which, when executed by a processor, implement the steps in the above-mentioned method.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the embodiment can detect the battery voltage of the battery when the battery is charged with constant current; when the voltage of the battery reaches an initial constant voltage which is greater than a safety cut-off voltage, performing constant voltage charging on the battery at least twice, wherein the voltage of each constant voltage charging is smaller than the voltage of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage; therefore, the constant-current charging time is prolonged, the charging speed is improved, meanwhile, the charging is carried out by adopting larger charging voltage in partial constant-voltage charging stage, the charging time in the constant-voltage stage is effectively reduced, the overall charging speed is greatly improved, and the overall charging time is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a flow chart illustrating a charging method according to an exemplary embodiment.
Fig. 2 is a schematic diagram illustrating charging current and battery voltage as a function of charging time in accordance with an exemplary embodiment.
Fig. 3 is a block diagram illustrating a charging device according to an exemplary embodiment.
Fig. 4 is a block diagram illustrating a charging device according to an exemplary embodiment.
Fig. 5 is a block diagram illustrating a charging device according to an exemplary embodiment.
Fig. 6 is a block diagram illustrating a charging device according to an exemplary embodiment.
Fig. 7 is a block diagram illustrating a charging device according to an exemplary embodiment.
Fig. 8 is a block diagram illustrating a charging device according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
With the demand for a charging speed increasing, a faster and faster charging scheme is also continuously adopted, in the Current charging scheme, the charging speed increasing in a Constant Current (CC) stage is mainly achieved through a system and a design, but the increasing in a Constant Voltage (CV) stage is smaller, but in an actual charging process, the charging speed in the CV stage is greatly reduced due to the smaller Current in the CV stage, and the charging time is greatly prolonged.
In order to solve the above problem, the present embodiment may detect a battery voltage of a battery when the battery is subjected to constant current charging; when the voltage of the battery reaches an initial constant voltage which is greater than a safety cut-off voltage, performing constant voltage charging on the battery at least twice, wherein the voltage of each constant voltage charging is smaller than the voltage of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage; therefore, the constant-current charging time is prolonged, the charging speed is improved, meanwhile, the charging is carried out by adopting larger charging voltage in partial constant-voltage charging stage, the charging time in the constant-voltage stage is effectively reduced, the overall charging speed is greatly improved, and the overall charging time is reduced.
Fig. 1 is a flowchart illustrating a charging method according to an exemplary embodiment, where the charging method is used in a terminal, as shown in fig. 1, and includes the following steps 101 and 102:
in step 101, a battery voltage of a battery is detected while the battery is subjected to constant current charging.
In step 102, when the voltage of the battery reaches an initial constant voltage, performing constant voltage charging on the battery at least twice, wherein the initial constant voltage is greater than a safety cut-off voltage; the voltage of each constant voltage charging is smaller than that of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage.
After entering the constant current charging stage, when the battery voltage reaches the safety cut-off voltage, the existing charging technology enters the constant voltage charging stage, and the battery voltage is maintained to be the safety cut-off voltage to perform constant voltage charging on the battery until the battery is fully charged. In the above charging process, various polarization phenomena may occur due to the influence of various factors such as electrolyte concentration and electron migration, and mainly, the electrode potential may greatly deviate from the equilibrium potential. This shifted potential is also known as the virtual potential. Such polarization has a large relationship with the current, and the polarization is reduced with the reduction of the charging current in the constant voltage charging stage, and the recovery of the polarization takes a relatively long time, so that the constant voltage stage is maintained for a long time, and a large amount of charging time is consumed.
Therefore, the present embodiment adjusts the cutoff voltage of the constant current charging from the safe cutoff voltage to the initial constant voltage greater than the safe cutoff voltage, so as to prolong the constant current charging time, shorten the constant voltage charging time, and further shorten the total charging time. Meanwhile, in the present embodiment, in the constant voltage charging stage, the battery is subjected to constant voltage charging twice or more, the voltage of each constant voltage charging is smaller than the voltage of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage. Therefore, the initial constant voltage higher than the safety cut-off voltage is adopted to carry out the constant voltage charging at the initial stage of the constant voltage charging stage, the charging current at the stage is larger, the corresponding polarization is larger, the larger charging voltage can be adopted to offset the polarization, the charging current is continuously reduced along with the constant voltage charging stage, the corresponding polarization condition is continuously reduced, the charging voltage lower than the initial constant voltage (more than or equal to the safety cut-off voltage) can be used for carrying out the constant voltage charging at the moment, the quick charging at the gradual stage is realized through the voltage reduction stage, and the effects of increasing the charging current and increasing the charging speed are achieved.
For example, assuming that the battery is charged twice with constant voltage in the constant voltage charging stage, the battery may be first charged with constant voltage by maintaining the battery voltage at an initial constant voltage, and then charged with constant voltage by maintaining the battery voltage at a safe cut-off voltage after the first constant voltage charging for a certain period of time until the battery is fully charged.
It should be noted that the safe cut-off voltage is a final charging voltage in a constant voltage charging stage, which is set to ensure the charging safety of the battery, and the safe cut-off voltage of the battery is generally smaller than the safe voltage of the battery, and the safe voltage of the battery is determined by the cell material of the battery, for example, the safe voltage of the battery may be 4.3V, 4.35V, 4.4V, etc. for a cell with a safe voltage of 4.3V, the safe cut-off voltage of the battery is generally set to be 4.25V, and in this embodiment, in order to ensure the charging safety of the battery, the initial constant voltage used in the first constant voltage charging in the constant voltage charging stage is not much larger than the safe cut-off voltage, and preferably not to exceed the safe voltage of the battery, so that the battery voltage is controlled not to exceed the limit capacity of the battery, and the service life and safety of the battery.
The embodiment can detect the battery voltage of the battery when the battery is charged with constant current; when the voltage of the battery reaches an initial constant voltage which is greater than a safety cut-off voltage, performing constant voltage charging on the battery at least twice, wherein the voltage of each constant voltage charging is smaller than the voltage of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage; therefore, the constant-current charging time is prolonged, the charging speed is improved, meanwhile, the charging is carried out by adopting larger charging voltage in the constant-voltage charging stage, the charging time in the constant-voltage stage is effectively reduced, the overall charging speed is greatly improved, and the overall charging time is reduced.
In one possible implementation, step 102 in the above charging method may be implemented as the following steps a1 and a 2.
In step a1, when the battery is subjected to the nth constant voltage charging, a current of the nth constant voltage charging is detected.
In step A2, the current in the nth constant voltage charge is decreased to InWhen the battery is charged, the battery is subjected to (n + 1) th constant voltage charging; the voltage of the (n + 1) th constant voltage charging is smaller than the voltage of the (n) th constant voltage charging and is larger than or equal to the safety cut-off voltage, and n is an integer larger than or equal to 1.
Here, in the constant voltage charging stage, the charging current decreases with the increase of time, the corresponding polarization condition decreases, and the charging voltage required for counteracting the polarization phenomenon may also decrease accordingly, so that the present embodiment may adjust the voltage of the constant voltage charging by detecting the current in the constant voltage charging stage.
Here, assuming that the battery is subjected to constant voltage charging three times in the constant voltage charging stage, when the battery is subjected to constant voltage charging for the first time, that is, when n is 1 times, the voltage of the 1 th time constant voltage charging is the initial voltage U1Maintaining the initial voltage U1In the process of constant-voltage charging, the charging current is gradually reduced, and the current at the time of first constant-voltage charging, which is the current I at the time of constant-current charging, can be detected1Down to I2Then, the battery is subjected to constant voltage charging (n + 1-2 times) and the voltage U of the second constant voltage charging2Voltage U less than the first constant voltage charging1Greater than the safe cut-off voltage U3(ii) a Namely U1>U2>U3。
Here, the battery is subjected to a first constant voltage chargeWhen the voltage is electrically charged (n is 2 times), the voltage of the n-th 2-time constant voltage charge is U2Maintain U2In the process of constant voltage charging, the charging current is gradually reduced, and the current in the second constant voltage charging can be detected when the current is reduced to I3When the voltage of the battery is equal to the safe cut-off voltage U, the battery is subjected to constant voltage charging for the (n + 1) -3 th time and the voltage of the constant voltage charging for the third time is the safe cut-off voltage U3。
It should be noted here that the charging upper limit voltages of the battery are different in different constant voltage charging stages, so that different constant voltage voltages (not exceeding the charging upper limit voltage in the stage) can be designed for each constant voltage charging, so as to meet the requirements of the battery in the charging process, achieve the maximum charging speed, control the overall voltage not to exceed the limit capability of the battery, and ensure the life safety of the battery for a long time.
Fig. 2 is a schematic diagram illustrating the variation of charging current and battery voltage with charging time according to an exemplary embodiment, and for convenience of explanation, only a constant current charging phase and a constant voltage charging phase are shown in fig. 2. As shown in fig. 2, a diagram (a) is a schematic diagram of a charging current with charging time in the prior art, a diagram (b) is a schematic diagram of a battery voltage with charging time in the prior art, a diagram (c) is a schematic diagram of a charging current with charging time in the present disclosure, and a diagram (d) is a schematic diagram of a battery voltage with charging time in the present disclosure.
As shown in fig. 2, during the constant current charging phase, I is adopted1Constant current charging is carried out, the battery voltage is gradually increased along with the increase of the charging time, and when the current value of the battery voltage reaches U3(safe cut-off voltage), in the prior art, the constant voltage charging stage is directly entered; in the present disclosure, since the initial constant voltage is set to be U1The battery continues to be charged with current I1Charging at constant current until the battery voltage reaches an initial constant voltage U1Then, the constant voltage charging stage is entered. The method adopts an initial constant voltage U after entering a constant voltage charging stage1For the first time constantVoltage charging, the charging current gradually decreases with the time increase, when the charging current is from I1Down to I2In the meantime, U is adopted2Subjecting said battery to a second constant voltage charge during which the charging current continues to decrease from I2Down to I3In the meantime, U is adopted3And carrying out constant voltage charging on the battery for the third time until the battery is fully charged.
As can be seen from fig. 2, the constant current charging phase during time t1 is the same as the charging speed of the present disclosure, after which the present disclosure continues with constant current charging for a short period of time (t3-t1) during which the charging current of the prior art decreases the charging voltage constant, while the charging current of the present disclosure constant the charging voltage increases, so the charging speed of the present disclosure is greater than the prior art during this period of time. During the time period (t4-t3) after the time period, the charging constant voltage of the present disclosure in a part of the time is greater than the charging constant voltage of the prior art, the charging constant voltage of the remaining part is equal to the charging constant voltage of the prior art, and the charging current of the present disclosure is always greater than the charging current of the prior art, so during the time period (t4-t3), the charging speed of the present disclosure is also greater than the prior art, so the overall charging speed of the present disclosure is greater than the prior art, and the charging time is less than the prior art.
As can be seen from fig. 2, in the prior art, the constant current charging time period is t1, the constant voltage charging time period is t2, the constant current charging time period in the present disclosure is t3, the constant voltage charging time period is t4, although t3 is greater than t1, t4 is much less than t2, when charging batteries with the same battery capacity, the total charging time period (t1+ t2) is greater than (t3+ t4), and the overall charging time of the batteries can be shortened by implementing the present disclosure.
The above-mentioned scheme is only exemplified by performing three times of constant voltage charging on the battery, and four or more times of constant voltage charging may be performed in the constant voltage charging stage, which is not limited herein.
The embodiment can adjust the voltage of constant voltage charging by detecting the current in the constant voltage charging stage, and has accurate adjustment and simple realization.
In one possible embodiment, the voltage difference between the initial constant voltage and the safety cut-off voltage ranges from 20mv to 100 mv.
For example, for a cell with a safe voltage of 4.3V, the safe cut-off voltage of the battery is generally set to 4.2V, and in this case, the initial constant voltage may be set to 4.22V, 4.3V, or any value between 4.22V and 4.3V, such as 4.25V, 4.27V, and so on.
The embodiment can set the voltage difference between the initial constant voltage and the safety cut-off voltage to be in the range of 20mv to 100mv, thus, the battery voltage is controlled not to exceed the limit capacity of the battery, and the service life and the safety of the battery are ensured.
In one possible embodiment, the constant current charging of the battery in the above charging method may be implemented as the following step B1.
In step B1, the battery is subjected to at least two times of constant current charging, wherein the current of each time of constant current charging is smaller than that of the last time of constant current charging.
Here, in the initial stage of charging of a battery such as a lithium battery, the concentration of lithium ions in the internal electrolyte is large, the rate of binding of lithium ions and electrons on the graphite negative plate is high, and constant current charging with a large current is allowed; along with the progress of the charging process, the concentration of lithium ions in the electrolyte is reduced, the speed of combining the lithium ions and electrons on the graphite negative plate is reduced, and therefore the current of constant-current charging can be gradually reduced along with the progress of the charging process.
For example, assuming that the battery is charged three times with a constant voltage in the constant current charging stage, the charging current I may be maintained first5The first constant current charging is carried out, the charging voltage is gradually increased along with the constant current charging, and when the charging voltage is increased to U5When charging current of constant current charging is adjusted to I4Performing a second constant current charge when the charging voltage is from U5Increase to U4When charging current of constant current charging is adjusted to I1Performing constant current charging for the third time until the charging voltage is increased to the initial voltage U1And stopping constant current charging. Wherein, U1>U4>U5；I5>I4>I1。
The present embodiment can perform at least two times of constant current charging on the battery in the constant current charging stage, wherein the current of each time of constant current charging is smaller than the current of last time of constant current charging, so that the charging speed in the constant current charging stage can be increased, and further the overall charging speed of the battery can be increased, and the overall charging time can be reduced.
In a possible embodiment, the charging method further includes the following steps C1 and C2.
In step C1, the battery model of the battery is acquired.
In step C2, the safety cut-off voltage and the initial constant voltage corresponding to the battery are determined according to the pre-stored correspondence relationship between the battery type and the safety cut-off voltage and the initial constant voltage.
Here, each item of information of the battery stored in the terminal where the battery is located includes the battery model, so the terminal where the battery is located can directly obtain the battery model from the storage space, and meanwhile, the terminal can store the corresponding safety cut-off voltage and initial constant voltage of each battery model during safety charging, so the terminal can determine the safety cut-off voltage and the initial constant voltage corresponding to the battery according to the corresponding relationship among the pre-stored battery model, the safety cut-off voltage and the initial constant voltage.
The embodiment can acquire the battery model of the battery, and determine the safe cut-off voltage and the initial constant voltage corresponding to the battery according to the pre-stored corresponding relation between the battery model and the safe cut-off voltage and the initial constant voltage, so that the determination mode is convenient and quick.
The implementation is described in detail below by way of several embodiments.
Fig. 3 is a flowchart illustrating a charging method according to an exemplary embodiment, which may be implemented by a terminal or the like, as shown in fig. 4, including steps 301 and 305.
In step 301, the battery model of the battery is obtained.
In step 302, the safety cut-off voltage and the initial constant voltage corresponding to the battery are determined according to a pre-stored correspondence relationship between the battery type and the safety cut-off voltage and the initial constant voltage.
In step 303, the battery is subjected to at least two times of constant current charging, wherein the current of each time of constant current charging is smaller than that of the last time of constant current charging.
In step 304, a battery voltage of a battery is detected while the battery is being constant current charged.
In step 305, the battery is subjected to constant voltage charging at least twice when the battery voltage reaches an initial constant voltage, which is greater than a safety cutoff voltage.
Wherein a voltage difference between the initial constant voltage and the safety cutoff voltage ranges from 20mv to 100 mv. The voltage of each constant voltage charging is smaller than that of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage.
The following are embodiments of the disclosed apparatus that may be used to perform embodiments of the disclosed methods.
Fig. 4 is a block diagram illustrating a charging apparatus that may be implemented as part or all of an electronic device via software, hardware, or a combination of both, according to an example embodiment. As shown in fig. 4, the charging device includes:
the detection module 401 is configured to detect a battery voltage of a battery when the battery is subjected to constant current charging;
a constant voltage module 402 for performing constant voltage charging of the battery at least twice when the battery voltage reaches an initial constant voltage, the initial constant voltage being greater than a safety cutoff voltage;
the voltage of each constant voltage charging is smaller than that of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage.
As a possible embodiment, fig. 5 is a block diagram of a charging apparatus according to an exemplary embodiment, and as shown in fig. 5, the charging apparatus disclosed above may further configure the constant voltage module 402 to include a detection sub-module 4021 and a constant voltage sub-module 4022, where:
the detection submodule 4021 is configured to detect a current during nth constant voltage charging of the battery;
a constant voltage sub-module 4022 for reducing a current to I at the nth constant voltage chargingnWhen the battery is charged, the battery is subjected to (n + 1) th constant voltage charging; the voltage of the (n + 1) th constant voltage charging is smaller than the voltage of the (n) th constant voltage charging and is larger than or equal to the safety cut-off voltage, and n is an integer larger than or equal to 1.
As a possible embodiment, the voltage difference between the initial constant voltage and the safety cut-off voltage in the above-disclosed charging device ranges from 20mv to 100 mv.
As a possible embodiment, fig. 6 is a block diagram illustrating a charging device according to an exemplary embodiment, and as shown in fig. 6, the charging device disclosed above may be further configured to include a constant current module 403, wherein:
and the constant current module 403 is configured to perform constant current charging on the battery at least twice, where a current of each constant current charging is smaller than a current of a previous constant current charging.
As a possible embodiment, fig. 7 is a block diagram of a charging apparatus according to an exemplary embodiment, and as shown in fig. 7, the charging apparatus disclosed above may be further configured to include an obtaining module 404 and a determining module 405, where:
an obtaining module 404, configured to obtain a battery model of the battery;
a determining module 405, configured to determine the safety cut-off voltage and the initial constant voltage corresponding to the battery according to a pre-stored correspondence relationship between the battery model and the safety cut-off voltage and the initial constant voltage.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 8 is a block diagram illustrating a charging apparatus according to an exemplary embodiment, which is suitable for a terminal device. For example, the apparatus 800 may be a mobile phone, a game console, a computer, a tablet device, a personal digital assistant, and the like.
The apparatus 800 may include one or more of the following components: a processing component 801, a memory 802, a power component 803, a multimedia component 804, an audio component 805, an input/output (I/O) interface 806, a sensor component 807, and a communication component 808.
The processing component 801 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 801 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 801 may include one or more modules that facilitate interaction between the processing component 801 and other components. For example, the processing component 801 may include a multimedia module to facilitate interaction between the multimedia component 804 and the processing component 801.
The memory 802 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 802 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 803 provides power to the various components of the device 800. The power components 803 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus 800.
The multimedia component 804 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 804 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 805 is configured to output and/or input audio signals. For example, the audio component 805 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 802 or transmitted via the communication component 808. In some embodiments, the audio component 805 also includes a speaker for outputting audio signals.
The I/O interface 806 provides an interface between the processing component 801 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly 807 includes one or more sensors for providing various aspects of condition assessment for the apparatus 800. For example, sensor assembly 807 may detect the open/closed state of device 800, the relative positioning of components such as a display and keypad of device 800, the change in position of device 800 or a component of device 800, the presence or absence of user contact with device 800, the orientation or acceleration/deceleration of device 800, and the change in temperature of device 800. Sensor assembly 807 may comprise a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. The sensor assembly 807 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 807 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 808 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 808 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 808 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 802 comprising instructions, executable by the processor 820 of the device 800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
A non-transitory computer readable storage medium, instructions in which, when executed by a processor of a device 800, enable the device 800 to perform the above charging method, the method comprising:
detecting the battery voltage of a battery when the battery is subjected to constant current charging;
when the voltage of the battery reaches an initial constant voltage, performing constant voltage charging on the battery for at least two times, wherein the initial constant voltage is greater than a safe cut-off voltage;
the voltage of each constant voltage charging is smaller than that of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage.
In one embodiment, the performing at least two constant voltage charges on the battery includes:
detecting a current at the time of the nth constant voltage charging when the battery is subjected to the nth constant voltage charging;
the current at the nth constant voltage charging is reduced to InWhen the battery is charged, the battery is subjected to (n + 1) th constant voltage charging; the voltage of the (n + 1) th constant voltage charging is smaller than the voltage of the (n) th constant voltage charging and is larger than or equal to the safety cut-off voltage, and n is an integer larger than or equal to 1.
In one embodiment, a voltage difference between the initial constant voltage and the safety cutoff voltage ranges from 20mv to 100 mv.
In one embodiment, the constant current charging the battery comprises:
and performing constant current charging on the battery for at least two times, wherein the current of each constant current charging is smaller than that of the previous constant current charging.
In one embodiment, the method further comprises:
acquiring the battery model of the battery;
and determining the safe cut-off voltage and the initial constant voltage corresponding to the battery according to the corresponding relationship among the pre-stored battery model, the safe cut-off voltage and the initial constant voltage.
The present embodiment also provides a charging device, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
detecting the battery voltage of a battery when the battery is subjected to constant current charging;
when the voltage of the battery reaches an initial constant voltage, performing constant voltage charging on the battery for at least two times, wherein the initial constant voltage is greater than a safe cut-off voltage;
the voltage of each constant voltage charging is smaller than that of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage.
In one embodiment, the processor may be further configured to:
the constant voltage charging of the battery is performed at least twice, including:
detecting a current at the time of the nth constant voltage charging when the battery is subjected to the nth constant voltage charging;
the current at the nth constant voltage charging is reduced to InWhen the battery is charged, the battery is subjected to (n + 1) th constant voltage charging; the voltage of the (n + 1) th constant voltage charging is smaller than the voltage of the (n) th constant voltage charging and is larger than or equal to the safety cut-off voltage, and n is an integer larger than or equal to 1.
In one embodiment, the processor may be further configured to:
the voltage difference between the initial constant voltage and the safety cut-off voltage ranges from 20mv to 100 mv.
In one embodiment, the processor may be further configured to:
the constant current charging of the battery comprises:
and performing constant current charging on the battery for at least two times, wherein the current of each constant current charging is smaller than that of the previous constant current charging.
In one embodiment, the processor may be further configured to:
the method further comprises the following steps:
acquiring the battery model of the battery;
and determining the safe cut-off voltage and the initial constant voltage corresponding to the battery according to the corresponding relationship among the pre-stored battery model, the safe cut-off voltage and the initial constant voltage.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (12)
1. A method of charging, comprising:
detecting the battery voltage of a battery when the battery is subjected to constant current charging;
when the voltage of the battery reaches an initial constant voltage, performing constant voltage charging on the battery for at least two times, wherein the initial constant voltage is greater than a safe cut-off voltage;
the voltage of each constant voltage charging is smaller than that of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage.
2. The charging method according to claim 1, wherein said performing at least two constant voltage charges on said battery comprises:
detecting a current at the time of the nth constant voltage charging when the battery is subjected to the nth constant voltage charging;
the current at the nth constant voltage charging is reduced to InWhen the battery is charged, the battery is subjected to (n + 1) th constant voltage charging; the voltage of the (n + 1) th constant voltage charging is smaller than the voltage of the (n) th constant voltage charging and is larger than or equal to the safety cut-off voltage, and n is an integer larger than or equal to 1.
3. The charging method as claimed in claim 1, wherein a voltage difference between the initial constant voltage and the safety cut-off voltage ranges from 20mv to 100 mv.
4. The charging method according to claim 1, wherein the constant-current charging the battery comprises:
and performing constant current charging on the battery for at least two times, wherein the current of each constant current charging is smaller than that of the previous constant current charging.
5. The charging method according to claim 1, further comprising:
acquiring the battery model of the battery;
and determining the safe cut-off voltage and the initial constant voltage corresponding to the battery according to the corresponding relationship among the pre-stored battery model, the safe cut-off voltage and the initial constant voltage.
6. A charging device, comprising:
the detection module is used for detecting the battery voltage of the battery when the battery is subjected to constant current charging;
the constant voltage module is used for performing constant voltage charging on the battery at least twice when the voltage of the battery reaches an initial constant voltage, wherein the initial constant voltage is greater than a safe cut-off voltage;
the voltage of each constant voltage charging is smaller than that of the last constant voltage charging, the voltage of the first constant voltage charging is the initial constant voltage, and the voltage of the last constant voltage charging is the safety cut-off voltage.
7. The charging device as claimed in claim 6, wherein the constant voltage module comprises:
the detection submodule is used for detecting the current during the nth constant voltage charging when the nth constant voltage charging is carried out on the battery;
a constant voltage sub-module for reducing the current at the nth constant voltage charging to InWhen the battery is charged, the battery is subjected to (n + 1) th constant voltage charging; the voltage of the (n + 1) th constant voltage charging is smaller than the voltage of the (n) th constant voltage charging and is larger than or equal to the safety cut-off voltage, and n is an integer larger than or equal to 1.
8. The charging method as claimed in claim 6, wherein a voltage difference between the initial constant voltage and the safety cut-off voltage ranges from 20mv to 100 mv.
9. A charging arrangement as claimed in claim 6, in which the arrangement comprises:
and the constant current module is used for performing constant current charging on the battery for at least two times, wherein the current of each constant current charging is smaller than that of the previous constant current charging.
10. A charging arrangement as claimed in claim 6, the arrangement further comprising:
the acquisition module is used for acquiring the battery model of the battery;
and the determining module is used for determining the safe cut-off voltage and the initial constant voltage corresponding to the battery according to the corresponding relationship among the pre-stored battery model, the safe cut-off voltage and the initial constant voltage.
11. A charging device, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the steps of the method of any one of claims 1 to 5.
12. A computer readable storage medium storing computer instructions, wherein the computer instructions, when executed by a processor, implement the steps of the method of any one of claims 1 to 5.
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| CN201910656874.5A CN112242726A (en) | 2019-07-19 | 2019-07-19 | Charging method and device |
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| CN201910656874.5A CN112242726A (en) | 2019-07-19 | 2019-07-19 | Charging method and device |
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Application publication date: 20210119 |