CN113258150B

CN113258150B - Charging method and device, electronic equipment and computer readable storage medium

Info

Publication number: CN113258150B
Application number: CN202010088676.6A
Authority: CN
Inventors: 谢雪云; 陈仁杰
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-02-12
Filing date: 2020-02-12
Publication date: 2022-11-08
Anticipated expiration: 2040-02-12
Also published as: CN113258150A

Abstract

The disclosure relates to a charging method and device, an electronic device and a computer readable storage medium. The charging method is applied to the electronic equipment to be charged and comprises the following steps: identifying power of a charger after connection of the electronic device to the charger is monitored; determining a temperature of a battery of the electronic device; and determining a charging strategy of the electronic equipment according to the power and the temperature, wherein different powers correspond to different charging strategies, and the charging strategy comprises the step of carrying out constant-voltage charging on the electronic equipment at the end of a charging phase by using overvoltage charging voltage and cutoff charging current corresponding to the power when the temperature falls in a first temperature range. Through this openly can adapt to the power of different chargers, adopt the excessive pressure mode of charging to charge to electronic equipment.

Description

Charging method and device, electronic equipment and computer readable storage medium

Technical Field

The present disclosure relates to the field of terminal technologies, and in particular, to a charging method and apparatus, an electronic device, and a computer-readable storage medium.

Background

When a 3C product including a polymer lithium ion battery on the market is charged by a charger, if the charger is identified as a non-standard charger, a press charging method is basically used. The battery is typically charged in a conventional direct charge manner based on the identified current charger power. The charging speed of the charging method is low, the performance or the service life of the battery can be influenced, and even potential safety hazards can be caused.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a charging method and apparatus, an electronic device, and a computer-readable storage medium.

According to a first aspect of the embodiments of the present disclosure, there is provided a charging method applied to an electronic device to be charged, including: identifying power of a charger after connection of the electronic device to the charger is monitored; determining a temperature of a battery of the electronic device; and determining a charging strategy of the electronic equipment according to the power and the temperature, wherein different powers correspond to different charging strategies, and the charging strategy comprises the step of charging the electronic equipment at the end of a charging phase at a constant voltage by using an overvoltage charging voltage and a cut-off charging current corresponding to the power when the temperature falls within a first temperature range.

In one embodiment, the overvoltage charging voltage is predetermined by a charge-discharge cycle test of the battery at the power and is greater than a design charging voltage of the battery, and the cutoff charging current is a cutoff charging current when a standard capacity of the battery is obtained by charging the battery with the overvoltage charging voltage and is greater than the design cutoff charging current of the battery.

In another embodiment, after the constant voltage charging of the electronic device using the over-voltage charging voltage and the off-charging current is stopped, the voltage of the battery falls back from the over-voltage charging voltage to the design charging voltage.

In yet another embodiment, when the temperature falls within a second temperature range lower than the first temperature range or a third temperature range higher than the first temperature range, the electronic device is step-charged if a maximum charging current of the charger is greater than a maximum direct charging threshold current of the battery at the temperature, and the electronic device is directly charged if the maximum charging current is less than or equal to the maximum direct charging threshold current.

In yet another embodiment, the maximum direct charge threshold current is predetermined by a charge-discharge cycle test of the battery at the temperature.

In yet another embodiment, the step charging includes: the method comprises the steps of charging the battery to a safe voltage by utilizing the maximum charging current in a constant current mode, charging the battery to the maximum direct charging threshold current by utilizing the safe voltage in a constant voltage mode, charging the battery to the rated voltage by utilizing the maximum direct charging threshold current in a constant current mode, and charging the battery to the designed cut-off charging current by utilizing the rated voltage in a constant voltage mode, wherein the safe voltage is the limiting voltage of the battery which is larger than the maximum direct charging threshold current, and the safe voltage is lower than the rated voltage.

In yet another embodiment, the direct charging comprises: and charging to the rated voltage of the battery by using the maximum charging current constant current, and charging to the designed cut-off charging current by using the rated voltage constant voltage.

In yet another embodiment, the second temperature range includes a plurality of second temperature sub-ranges, and the maximum direct charge threshold current is predetermined by a charge-discharge cycle test of the battery at each of the plurality of second temperature sub-ranges.

In yet another embodiment, the third temperature range includes a plurality of third temperature sub-ranges, and the maximum direct charge threshold current is predetermined by a charge-discharge cycle test of the battery at each of the plurality of third temperature sub-ranges.

According to a second aspect of the embodiments of the present disclosure, there is provided a charging device applied to an electronic apparatus to be charged, including: the power identification module identifies the power of the charger after the electronic equipment is monitored to be connected with the charger; a temperature determination module that determines a temperature of a battery of the electronic device; and a charging strategy determination module, which determines the charging strategy of the electronic equipment according to the power and the temperature, wherein different powers correspond to different charging strategies, and the charging strategy comprises that when the temperature falls in a first temperature range, the electronic equipment is charged at the end of a charging phase in a constant voltage mode by using the overvoltage charging voltage and cut-off charging current corresponding to the power.

In yet another embodiment, the step charging includes: the method comprises the steps of utilizing the maximum charging current to perform constant current charging to reach a safe voltage, utilizing the safe voltage to perform constant voltage charging to reach the maximum direct charging threshold current, utilizing the maximum direct charging threshold current to perform constant current charging to reach the rated voltage of the battery, and utilizing the rated voltage to perform constant voltage charging to reach the designed cut-off charging current, wherein the safe voltage refers to the limit voltage of the battery which is higher than the maximum direct charging threshold current, and the safe voltage is lower than the rated voltage.

According to a third aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including: a processor; and a memory for storing processor-executable instructions, wherein the processor is configured to: the charging method described in the first aspect or any one of the embodiments of the first aspect is performed.

According to a fourth aspect of embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium, wherein instructions of the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the charging method described in the first aspect or any one of the implementation manners of the first aspect.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial technical effects: through the scheme of adapting to the optimal terminal overvoltage charging electrode quick charging of different chargers, the terminal charging voltage is improved, and the charging time is greatly reduced. In addition, through the best safe, quick charge strategy of different chargers in different temperature environment of adaptation, reduce the thermal risk, prolong battery life relatively.

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 of a charging method according to an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a charging strategy according to an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic illustration of a very fast charge according to an exemplary embodiment of the present disclosure;

fig. 4 is a block diagram of a charging device according to an exemplary embodiment of the present disclosure; and

fig. 5 is a block diagram of an electronic device according to an exemplary embodiment of the present disclosure.

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 do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the disclosure, as detailed in the appended claims.

In the related art, the direct charging current and voltage are usually adjusted by detecting different chargers and the current ambient temperature. According to the related art, when a charger is connected to a 3C product, the whole machine detects the charger power, then the whole machine sets the battery fuel gauge register and the battery temperature is read, and the battery is charged with squeezing the maximum output power of the charger.

According to the charging method of the related art, the charging voltage and the full-charge current are both in accordance with the conventional cell platform charging voltage and cutoff current. The charging current is the maximum direct charging current converted from the maximum output power. For example, for a 4.4V battery, 10W is charged and the charging mode at room temperature is 2A Constant Current (CC) to 4.4V and 4.4V Constant Voltage (CV) to a design cutoff charging current of 200mA for the battery.

The above charging method has at least two disadvantages. First, the maximum current output to the battery by the different chargers charges to the rated voltage, which makes there a direct charging risk and battery aging aggravation problem. Second, direct charging can only be output from a maximum in power, and the current for full charging is too small on the charging strategy, resulting in too long a time to charge at the end CV.

The embodiment of the disclosure provides a charging method, which can be applied to charging electronic equipment containing a polymer lithium ion battery. According to the charging method, a faster and safer conventional charging scheme and a faster charging scheme are provided by combining charging power, ambient temperature, direct charging, step charging and charging terminal overvoltage charging strategies.

Fig. 1 is a flow chart schematically illustrating a charging method according to an embodiment of the present disclosure. Referring to fig. 1, a charging method for charging an electronic device including a battery, includes the steps of:

step S101, after the connection between the electronic equipment and a charger is monitored, identifying the power of the charger;

step S102, determining the temperature of a battery of the electronic equipment; and

and step S103, determining a charging strategy of the electronic equipment according to the power and the temperature.

In an embodiment, in step S103, when the temperature falls within a first temperature range, the charging method performs step S1031: and carrying out constant voltage charging on the electronic equipment at the end of the charging phase by using the overvoltage charging voltage and the cut-off charging current corresponding to the power.

The charging process for a battery typically includes a charging phase front end and a charging phase end. The front end of the charging stage usually adopts multi-stage CV or CC/CV charging mode. The end of the charging phase is charged to the design cutoff current of the battery using an over-voltage charging voltage CV. The duration of the end of the charging phase is typically around 60% of the total duration of the charging phase. For example, in a 40W charging process, the current needs to be charged from 5.1A to 200mA at a constant voltage at the end of the charging phase, which is approximately 60% of the total time. Through raising the voltage of constant voltage charging at the battery end for charging current can maintain bigger charging current, makes heavy current constant voltage time longer, thereby can fill into more electric quantities in a shorter time, ensures that total integral capacity is the same.

In one embodiment, the over-voltage charging voltage is predetermined by a charge-discharge cycle test of the battery at the power. For example, in the case of mobile phones, it is generally required that the aging index of the battery is still satisfactory after 800 or 1500 charge and discharge cycles. The aging index includes, for example, the direct current impedance dcr of the battery, the battery capacity loss rate, and the like. Each charge-discharge cycle includes a standard charge process and a standard discharge process. In a standard charging process, the battery is charged with 0.5C, and the charging is stopped when the cutoff current of the battery is 0.02C more. And in the primary standard discharge process, discharging the battery by using 0.2C to obtain the standard capacity of the battery.

The above charge-discharge cycle test was performed at an overvoltage charging voltage 4.45V greater than the design charging voltage of the battery for a battery rated voltage of 4.4V at a charging power of 40W. After, for example, 800 charge-discharge cycles, the overvoltage charging voltage at which the battery aging index satisfies the requirement is determined as the overvoltage charging voltage corresponding to the 40W charging power. For example, the over-voltage charging voltage corresponding to 40W charging power is 4.48V, 30mV higher than the design charging voltage of 4.45V.

In one embodiment, after the overvoltage charging voltage is determined, a cutoff charging current at the time of obtaining a standard capacity of the battery by charging the battery with the overvoltage charging voltage is determined as the cutoff charging current. The cutoff charging current is greater than a designed cutoff charging current of the battery.

In one embodiment, charging stops after a constant voltage of the electronic device is charged to the off-charge current using the over-voltage charging voltage. The voltage of the battery then drops from the over-voltage charging voltage of 4.48V back to the design charging voltage of 4.45V.

The voltage charging voltage and the cutoff charging current at different powers were determined in the same manner as described above. For example, the voltage charging voltage and the cutoff charging current corresponding to 27W, 18W, and 10W charging powers, respectively, are determined.

The first temperature is, for example, 15 to 45 ℃, which is a normal temperature section of the battery. When the temperature does not fall within a first temperature range, that is, when the temperature falls within a second temperature range (low temperature section) lower than the first temperature range or a third temperature range (high temperature section) higher than the first temperature range, the charging method performs: step S1032, if the maximum charging current of the charger is greater than the maximum direct charging threshold current of the battery at the temperature, step S1303, if the maximum charging current is less than or equal to the maximum direct charging threshold current, step S1303, directly charging the electronic device.

In one embodiment, the maximum charging current is the maximum charging current that the charger can provide. The maximum direct charge threshold current is determined by the cell of the battery and depends on the temperature of the battery. Similar to the over-voltage charging voltage and the off-charge current described above, the maximum direct-charge threshold current is predetermined by a charge-discharge cycle test of the battery at the temperature.

In one embodiment, the step charging of step S1032 includes: charging to a safe voltage by using the maximum charging current in a constant current manner, charging to the maximum direct charging threshold current by using the safe voltage in a constant voltage manner, charging to the rated voltage of the battery by using the maximum direct charging threshold current in a constant current manner, and charging to the designed cut-off charging current by using the rated voltage in a constant voltage manner. For example, the safe voltage refers to a limit voltage of the battery at a current greater than the maximum direct charging threshold, and the safe voltage is lower than the rated voltage.

In one embodiment, the direct charging of step S1033 includes: and charging to the rated voltage of the battery by using the maximum charging current constant current, and charging to the designed cut-off charging current by using the rated voltage constant voltage.

In an embodiment, the second temperature range comprises a plurality of second temperature sub-ranges. That is, the low temperature section may be divided into a plurality of temperature sub-ranges, e.g., 0-10 deg.C, 10-15 deg.C. The maximum direct charge threshold current for each temperature sub-range is predetermined by a charge-discharge cycle test of the battery at each temperature sub-range.

Similarly, the third temperature range may include a plurality of third temperature sub-ranges. That is, the high temperature section above 45 ℃ may be divided into a plurality of temperature sub-ranges. The maximum direct charge threshold current for each temperature sub-range is predetermined by a charge-discharge cycle test of the battery at each temperature sub-range.

According to the embodiment of the disclosure, the temperature is used as the judgment condition of the fast charging and safe charging scheme. Due to the characteristic differences of the low-temperature, normal-temperature and high-temperature battery cells, the selection of charging voltage and current at different temperatures is very strict, so that the temperature is used as a basis for selecting which charging mode after the charging power is determined.

As described above, the battery is charged at the very high speed in the normal temperature section of the battery, i.e., 15 to 45 ℃, the over-voltage charging voltage is set to the design charging voltage + V1, and the off-current is set to the design off-charging current + i1. Here, V1 is the voltage rise of the overcharge at the end of the very fast charge, and i1 is the charge cut-off current of the very fast charge rise.

Alternatively, the battery may be charged using conventional strategies, i.e., using a design charge voltage and a design cutoff charge current CV, during the high and low temperature sections of the battery, i.e., temperature ranges below 15 ℃ and above 45 ℃.

The inventor finds that the charging characteristics of the battery cell determine that different power maximum charging currents are suitable for step charging or direct charging in the conventional charging. i is the maximum charging current which can be output by the current power charger, and A is the limited maximum direct charging threshold current. When i > A, the battery is charged in a step mode: i constant current to safe voltage V1, V1 constant voltage to current A, A constant current charging to rated voltage V, constant voltage V charging to designed cut-off charging current. When i is less than or equal to A, the battery is directly charged: i constant current value rated voltage V, and the rated voltage V is constant voltage to designed cut-off charging current.

The selection of the direct charging and the step charging of the rapid charging needs to accurately set the direct charging limiting current and limit the voltage. Under the condition of high and low temperature, the battery cores have the maximum charging current per se and also have the safety voltage (namely, a limiting voltage point) which is temporarily higher than the maximum charging current, the charging current is properly and temporarily increased, after the limiting voltage point is reached, the constant voltage is increased to the maximum limiting current A, the battery cores are charged to full charge according to the conventional maximum constant current ACC/CV, and the safety charging and the faster charging are both considered. For example, the maximum charging current until full charge is 5A to 4.4V, which can charge to 4.25V for a short time of 6A, but cannot charge to 4.4V with 6A. According to the embodiment of the disclosure, the charging can be performed by charging the battery to 4.25V in a step charging mode 6A and then to 4.4V in a step charging mode 5A.

According to the scheme, according to the charging characteristics of different electric cores, a safe and quick charging scheme and a set of top-speed charging scheme of a charger with different powers are matched, so that safe charging and quick charging are realized. The memory of the electronic device stores a set of charging strategy table based on different charging powers and different temperature ranges. When the charger is connected, the current charger power is identified, and the charging strategy under the current power in the memory is looked up, so that a set of reasonable safe charging scheme is selected. The charging strategy includes, for example, the following parameters: overvoltage charging voltage is applied to the tail end of the constant-temperature section at the top speed, and charging current is cut off in matching of overvoltage charging; a front-stage charging method (multi-stage Cv or CC/Cv, etc.) of normal-temperature-stage rapid charging; the maximum direct charging threshold currents A and B of 8230in the high and low temperature sections; and a high-low temperature stage step charging/direct charging mode.

Fig. 2 is a schematic diagram of a charging strategy according to an exemplary embodiment of the present disclosure. The charging policy table may include a power 1 charging policy group corresponding to power 1, a power 2 charging policy group corresponding to power 2, \8230, and a power N charging policy group corresponding to power N. Each charge strategy group includes charge strategies corresponding to respective temperature ranges. According to an embodiment of the present disclosure, identification of different power chargers provides an appropriate charging strategy. For example, the power 1 charging strategy group comprises a charging strategy 1 corresponding to a normal temperature section of 15-45 ℃, a charging strategy 2 corresponding to a low temperature section of 0-10 ℃, and a charging strategy 3 corresponding to a low temperature section of 10-15 \ 8230;.

In charging strategy 1, the battery is over-voltage charged at the end of the charging phase. In the charging strategies 2 and 3 \8230, the step charging or the direct charging of the electronic equipment is determined according to the relationship between the maximum charging current which can be output by the charger and the maximum direct charging threshold current of the battery in each temperature range. The charging strategy parameters in charging strategy 1, i.e., the over-voltage charging voltage and the off-charging current, are determined as described above. Similarly, the charge rate parameter in charge strategies 2, 3 \8230, i.e., the maximum direct charge threshold current, is determined as described above. And will not be described in detail herein. According to the embodiment of the disclosure, the charging strategies at different temperature sections are customized, so that the safety and the quick charging of the battery are ensured.

Fig. 3 is a schematic diagram of very fast charging according to an exemplary embodiment of the present disclosure. In fig. 3, the abscissa is the sampling point of the voltage and current of the battery, the left ordinate is the current (mA) of the battery during charging, and the right ordinate is the voltage (V) of the battery during charging.

As shown in fig. 3, according to the related art, the conventional charging phase includes a charging phase front end, i.e., three of P1, P2, and P3 in the drawing; and the end of the charging phase, P4 in the figure. In the P4 phase, the battery is charged at a constant voltage, typically with the design charge voltage of the battery, until the current is reduced to the design cutoff charge current. For example, for a 40W power charge, the design charge voltage during P4 is typically 4.45V. As further shown in fig. 3, in accordance with an embodiment of the present disclosure, the voltage of the battery is quickly raised to an over-voltage charging voltage, e.g., 4.48V, during the P4A phase. The battery is then charged at a constant voltage during the P4B phase using the over-voltage charging voltage until the current drops to the cutoff charging current. As shown, the P4A and P4B phases of the disclosed embodiments are significantly shorter in duration than the P4 phase of the related art. This is the mechanism by which the disclosed embodiments charge the battery very quickly at a normal temperature.

Further, as shown in fig. 3, after the constant voltage charging is stopped in the P5 stage, the voltage of the battery falls back from the over voltage charging voltage of 4.48V to the design charging voltage of 4.45V.

To verify the effect of the above-described technical charging, the inventors performed three sets of experiments as shown in tables 1, 2, and 3 below.

Table 1: charging system 1

In the charging mode 1, in the stage of P1, charging is carried out to 4.25V by using 8A; in the P2 stage, charge to 4.35V with 1.5c. During the P3 phase, cc was charged to 4.45V, the design charging voltage, using 1.3c. Finally, during the P4 phase, the CV is charged to 200mA, which is the design cutoff charging current. The charging mode 1 is non-overvoltage charging.

Table 2: charging system 2

The charging mode 2 is overvoltage charging. The phases P1, P2, and P3 are the same as in charging mode 1. Except that the P4 stage is replaced by P4A and P4B stages. In the P4A phase, 1C, CC to 4.48V, the over-voltage charging voltage, is utilized. In the P4B stage, the CV charges to an off charge current of 0.15C, which is greater than the above-mentioned design off charge current.

Table 3: charging mode 3

The charging mode 3 is overvoltage charging. The phases P1, P2, and P3 are the same as the charging method 2. Except that in the P4A phase 1c, cc to 4.5V, the higher over-voltage charging voltage, is utilized. In the P4B stage, the CV charge is set to the off-charge current of 0.21C, and the off-charge current is increased more than the charge mode 2 than the above design.

From the full charge time of the above table (i.e., 100% of the data in the soc column), it can be seen that the full charge time of the charging method 2 was reduced by 17.4min with respect to the charging method 1. The full charge time of charge mode 3 was reduced by 21.5min relative to charge mode 1.

The embodiment of the disclosure brings the following beneficial technical effects: on the one hand, safer charging is achieved. Under the different temperature sections, the limit direct charging and the limit step charging of the battery core are combined, the condition that the battery is not charged through overcurrent and overvoltage is guaranteed, and the aging and thermal risks of the battery are reduced. Charging under different powers, the charging strategy that the adaptation electric core matches has promoted the security and the cycle life of battery. On the other hand, faster charging is achieved. Different power chargers all have different overvoltage charging modes for overvoltage charging is general popular, and no matter what kind of charger all can obtain more excellent charging speed. And at high and low temperatures, the direct charging and the step charging are fully combined, and the optimal charging performance of the battery cell is released.

Fig. 4 is a block diagram of a charging device 400 according to an exemplary embodiment of the present disclosure. The charging apparatus 400 is applied to an electronic device to be charged, and includes: the power identification module 401 identifies the power of the charger after the electronic device is monitored to be connected with the charger; a temperature determination module 402 that determines a temperature of a battery of the electronic device; and a charging strategy determining module 403, configured to determine a charging strategy for the electronic device according to the power and the temperature, where different powers correspond to different charging strategies, and the charging strategy includes that when the temperature falls within a first temperature range, the electronic device is charged at a constant voltage at a charging stage end by using an overvoltage charging voltage and a cutoff charging current corresponding to the power.

Fig. 5 is a block diagram of an electronic device 500 shown in accordance with an example embodiment. For example, the electronic device 500 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 5, electronic device 500 may include one or more of the following components: a processing component 502, a memory 504, a power component 506, a multimedia component 508, an audio component 510, an input/output (I/O) interface 512, a sensor component 514, and a communication component 516.

The processing component 502 generally controls overall operation of the electronic device 500, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 502 may include one or more processors 520 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 502 can include one or more modules that facilitate interaction between the processing component 502 and other components. For example, the processing component 502 can include a multimedia module to facilitate interaction between the multimedia component 508 and the processing component 502.

The memory 504 is configured to store various types of data to support operations at the electronic device 500. Examples of such data include instructions for any application or method operating on the electronic device 500, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 504 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 component 506 provides power to the various components of the electronic device 500. Power components 506 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for electronic device 500.

The multimedia component 508 includes a screen that provides an output interface between the electronic device 500 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 508 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 electronic device 500 is in an operation mode, such as a photographing 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 510 is configured to output and/or input audio signals. For example, the audio component 510 includes a Microphone (MIC) configured to receive external audio signals when the electronic device 500 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 504 or transmitted via the communication component 516. In some embodiments, audio component 510 further includes a speaker for outputting audio signals.

The I/O interface 512 provides an interface between the processing component 502 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 514 includes one or more sensors for providing various aspects of status assessment for the electronic device 500. For example, the sensor assembly 514 may detect an open/closed state of the electronic device 500, the relative positioning of components, such as a display and keypad of the electronic device 500, the sensor assembly 514 may detect a change in the position of the electronic device 500 or a component of the electronic device 500, the presence or absence of user contact with the electronic device 500, orientation or acceleration/deceleration of the electronic device 500, and a change in the temperature of the electronic device 500. The sensor assembly 514 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 514 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 514 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 516 is configured to facilitate communications between the electronic device 500 and other devices in a wired or wireless manner. The electronic device 500 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 516 receives a broadcast signal or broadcast associated information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 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 electronic device 500 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 504 comprising instructions, executable by the processor 520 of the electronic device 500 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.

It is further understood that the use of "a plurality" in this disclosure means two or more, as other terms are analogous. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another, and do not indicate a particular order or degree of importance. Indeed, the terms "first," "second," etc. are used interchangeably throughout. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It is to be understood that although operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention 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 invention is limited only by the appended claims.

Claims

1. A charging method, applied to an electronic device to be charged, includes:

identifying power of a charger after connection of the electronic device to the charger is monitored;

determining a temperature of a battery of the electronic device; and

determining a charging strategy for the electronic device according to the power and the temperature, wherein different powers correspond to different charging strategies, the charging strategy comprises that when the temperature falls in a first temperature range, the electronic device is charged at a constant voltage at the end of a charging phase by using an overvoltage charging voltage corresponding to the power and a cutoff charging current, when the temperature falls in a second temperature range lower than the first temperature range or a third temperature range higher than the first temperature range, the electronic device is charged in a step mode if the maximum charging current of the charger is larger than the maximum direct charging threshold current of the battery at the temperature, and the electronic device is charged in a direct mode if the maximum charging current is smaller than or equal to the maximum direct charging threshold current;

wherein the first temperature range is a normal temperature section of the battery, the overvoltage charging voltage is predetermined by a charge-discharge cycle test of the battery at the power and is greater than a design charging voltage of the battery, and the cutoff charging current is a cutoff charging current when a standard capacity of the battery is obtained by charging the battery with the overvoltage charging voltage and is greater than the design cutoff charging current of the battery;

wherein the maximum direct charge threshold current is predetermined by a charge-discharge cycle test of the battery at the temperature;

the step charging includes: constant current charging to a safe voltage using the maximum charging current, constant voltage charging to the maximum direct charging threshold current using the safe voltage, constant current charging to a rated voltage of the battery using the maximum direct charging threshold current, and constant voltage charging to the designed cutoff charging current using the rated voltage, wherein the safe voltage is a limiting voltage of the battery at which the voltage is greater than the maximum direct charging threshold current, and the safe voltage is lower than the rated voltage;

the direct charging comprises: and charging to the rated voltage of the battery by using the maximum charging current constant current, and charging to the designed cut-off charging current by using the rated voltage constant voltage.

2. The charging method according to claim 1,

after the constant-voltage charging of the electronic device using the over-voltage charging voltage and the off-charging current is stopped, the voltage of the battery falls back from the over-voltage charging voltage to the design charging voltage.

3. The charging method according to claim 1, wherein the second temperature range includes a plurality of second temperature sub-ranges, and the maximum direct charge threshold current is predetermined by a charge-discharge cycle test of the battery at each of the plurality of second temperature sub-ranges.

4. The charging method of claim 1, wherein the third temperature range includes a plurality of third temperature sub-ranges, and the maximum direct charge threshold current is predetermined by a charge-discharge cycle test of the battery at each of the plurality of third temperature sub-ranges.

5. A charging apparatus, applied to an electronic device to be charged, comprising:

the power identification module identifies the power of the charger after the electronic equipment is monitored to be connected with the charger;

a temperature determination module that determines a temperature of a battery of the electronic device; and

a charging strategy determination module for determining a charging strategy of the electronic device according to the power and the temperature, wherein different powers correspond to different charging strategies, the charging strategy comprises that when the temperature falls in a first temperature range, the electronic device is charged at a constant voltage at the end of a charging phase by using an overvoltage charging voltage and a cutoff charging current corresponding to the power, when the temperature falls in a second temperature range lower than the first temperature range or a third temperature range higher than the first temperature range, the electronic device is charged in a step mode if the maximum charging current of the charger is larger than the maximum direct charging threshold current of the battery at the temperature, and the electronic device is charged in a direct mode if the maximum charging current is smaller than or equal to the maximum direct charging threshold current;

the step charging includes: charging to a safe voltage by using the maximum charging current constant current, charging to the maximum direct charging threshold current by using the safe voltage constant voltage, charging to a rated voltage of the battery by using the maximum direct charging threshold current constant current, and charging to the design cut-off charging current by using the rated voltage constant voltage, wherein the safe voltage is the limiting voltage of the battery which is greater than the maximum direct charging threshold current, and the safe voltage is lower than the rated voltage;

6. A charging arrangement as claimed in claim 5,

7. The charging device of claim 5, wherein the second temperature range includes a plurality of second temperature sub-ranges, and the maximum direct charge threshold current is predetermined by a charge-discharge cycle test of the battery at each of the plurality of second temperature sub-ranges.

8. The charging device of claim 5, wherein the third temperature range includes a plurality of third temperature sub-ranges, and the maximum direct charge threshold current is predetermined by a charge-discharge cycle test of the battery at each of the plurality of third temperature sub-ranges.

9. An electronic device, comprising:

a processor; and

a memory for storing processor-executable instructions,

wherein the processor is configured to: performing the charging method of any one of claims 1-4.

10. A non-transitory computer readable storage medium, instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the charging method of any one of claims 1-4.