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

Abstract

The present disclosure relates to a charging method and apparatus, an electronic device, and a computer-readable storage medium. The charging method is applied to an electronic device to be charged, including: after monitoring that the electronic device is connected to a charger, identifying the power of the charger; determining the temperature of the battery of the electronic device; The temperature determines a charging strategy for the electronic device, wherein different powers correspond to different charging strategies, and the charging strategy includes using the overvoltage charging voltage corresponding to the power and the charging strategy when the temperature falls within a first temperature range. The charging current is turned off, and the electronic device is charged with constant voltage at the end of the charging phase. By means of the present disclosure, the power of different chargers can be adapted, and the electronic device can be charged in an overvoltage charging manner.

Description

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

technical field

The present disclosure relates to the technical field of terminals, and in particular to a charging method and device, electronic equipment, and a computer-readable storage medium.

Background technique

At present, when 3C products containing polymer lithium-ion batteries on the market are charged by a charger, if the charger is recognized as a non-standard charger, the squeezing charging method is basically adopted. According to the identified current charger power, the battery is usually charged in a conventional direct charging manner. The charging speed of this charging method is low, which may affect the performance or life of the battery, and even cause safety hazards.

Contents of the invention

In order to overcome the problems existing in related technologies, the present disclosure provides a charging method and device, electronic equipment, and a computer-readable storage medium.

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

In one embodiment, the overvoltage charging voltage is predetermined through the charge-discharge cycle test of the battery at the power, and is greater than the design charging voltage of the battery, and the cut-off charging current is at The cut-off charging current when charging the battery with the overvoltage charging voltage to obtain the standard capacity of the battery is greater than the design cut-off charging current of the battery.

In another embodiment, after the constant voltage charging of the electronic device by using the overvoltage charging voltage and the cut-off charging current is stopped, the voltage of the battery drops from the overvoltage charging voltage to the designed charging voltage. Voltage.

In still another embodiment, 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, if the maximum charge of the charger If the current is greater than the maximum direct charging threshold current of the battery at the temperature, the electronic device is charged stepwise, and if the maximum charging current is less than or equal to the maximum direct charging threshold current, the electronic device is directly charged .

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

In yet another embodiment, the step charging includes: using the maximum charging current to charge with a constant current to a safe voltage, using the safe voltage to charge with a constant voltage to the maximum direct charging threshold current, using the maximum direct charging threshold Current constant current charging to the rated voltage of the battery, and using the rated voltage constant voltage charging to the design cut-off charging current, wherein the safe voltage refers to the limit of the battery current greater than the maximum direct charging threshold voltage, and the safe voltage is lower than the rated voltage.

In yet another embodiment, the direct charging includes: using the maximum charging current for constant current charging to the rated voltage of the battery, and using the rated voltage for constant voltage charging to the design cut-off charging current.

In yet another embodiment, the second temperature range includes a plurality of second temperature subranges, and the maximum direct charging threshold current is obtained by charging the battery under each of the plurality of second temperature subranges. Pre-determined by discharge cycle test.

In yet another embodiment, the third temperature range includes a plurality of third temperature subranges, and the maximum direct charging threshold current is obtained by charging the battery under each of the plurality of third temperature subranges. Pre-determined by discharge cycle test.

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

In one embodiment, the overvoltage charging voltage is predetermined through the charge-discharge cycle test of the battery at the power, and is greater than the design charging voltage of the battery, and the cut-off charging current is at The cut-off charging current when charging the battery with the overvoltage charging voltage to obtain the standard capacity of the battery is greater than the design cut-off charging current of the battery.

In another embodiment, after the constant voltage charging of the electronic device by using the overvoltage charging voltage and the cut-off charging current is stopped, the voltage of the battery drops from the overvoltage charging voltage to the designed charging voltage. Voltage.

In still another embodiment, 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, if the maximum charge of the charger If the current is greater than the maximum direct charging threshold current of the battery at the temperature, the electronic device is charged stepwise, and if the maximum charging current is less than or equal to the maximum direct charging threshold current, the electronic device is directly charged .

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

In yet another embodiment, the step charging includes: using the maximum charging current to charge with a constant current to a safe voltage, using the safe voltage to charge with a constant voltage to the maximum direct charging threshold current, using the maximum direct charging threshold Current constant current charging to the rated voltage of the battery, and using the rated voltage constant voltage charging to the design cut-off charging current, wherein the safe voltage refers to the limit of the battery current greater than the maximum direct charging threshold voltage, and the safe voltage is lower than the rated voltage.

In yet another embodiment, the direct charging includes: using the maximum charging current for constant current charging to the rated voltage of the battery, and using the rated voltage for constant voltage charging to the design cut-off charging current.

In yet another embodiment, the second temperature range includes a plurality of second temperature subranges, and the maximum direct charging threshold current is obtained by charging the battery under each of the plurality of second temperature subranges. Pre-determined by discharge cycle test.

In yet another embodiment, the third temperature range includes a plurality of third temperature subranges, and the maximum direct charging threshold current is obtained by charging the battery under each of the plurality of third temperature subranges. Pre-determined by discharge cycle test.

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

According to a fourth aspect of the embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium. When the instructions in the storage medium are executed by the processor of the electronic device, the electronic device can execute the above-mentioned first aspect or the second aspect. The charging method described in any one of the implementation manners in one aspect.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial technical effects: By adapting the optimal terminal overvoltage charging and ultra-fast charging schemes of different chargers, the terminal charging voltage is increased to greatly reduce the charging time. In addition, by adapting the best safe and fast charging strategies for different chargers in different temperature environments, the thermal risk is reduced and the battery life is relatively extended.

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 present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a flowchart 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 diagram of extremely fast charging 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 ways

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, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

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

According to this charging method in the related art, the charging voltage and full charging current are in accordance with the charging voltage and cut-off current of the conventional battery platform. The charging current is the maximum direct charging current converted from the maximum output power. For example, for a 4.4V battery, 10W charging, the charging method at room temperature is 2A constant current (constant current, CC) charging to 4.4V, 4.4V constant voltage (constant voltage, CV) charging to the design cut-off charging current of the battery is 200mA.

There are at least two disadvantages in the above charging method. First of all, the maximum current output by different chargers to the battery is charged to the rated voltage, which causes the risk of direct charging heat and the aging of the battery. Secondly, direct charging can only maximize the output in terms of power. In terms of charging strategy, the current for full charging is too small, resulting in too long a time for CV charging at the end.

An embodiment of the present disclosure provides a charging method, which can be applied to charging an electronic device containing a polymer lithium-ion battery. According to this charging method, combined with charging power, ambient temperature, direct charging, step charging, and overvoltage charging strategies at the charging end, a faster and safer conventional charging solution and an extremely fast charging solution are provided.

FIG. 1 is a flowchart schematically illustrating a charging method according to an embodiment of the present disclosure. Referring to Fig. 1, a charging method is used to charge an electronic device including a battery, comprising the following steps:

Step S101, after detecting that the electronic device is connected to the charger, identifying the power of the charger;

Step S102, determining the temperature of the battery of the electronic device; and

Step S103, determining a charging strategy for the electronic device according to the power and the temperature.

In one embodiment, in the step S103, when the temperature falls within the first temperature range, the charging method executes step S1031: using the overvoltage charging voltage and the cut-off charging current corresponding to the power, At the end of the charging phase, the electronic device is charged at a constant voltage.

The charging process of a battery generally includes a charging phase front end and a charging phase end. The front end of the charging phase usually adopts multi-stage CV or CC/CV charging. At the end of the charging phase, the overvoltage charging voltage CV is used to charge the battery to the design cut-off current. The duration at the end of the charging phase typically accounts for about 60% of the total duration of the charging phase. For example, in the 40W charging process, the end of the charging stage needs to charge the current from 5.1A constant voltage to 200mA, which accounts for nearly 60% of the total time. By increasing the voltage of constant voltage charging at the end of the battery, the charging current can maintain a larger charging current, making the time of high current constant voltage longer, so that more power can be charged in a shorter time, ensuring the total integral capacity Same.

In one embodiment, the overvoltage charging voltage is predetermined through a charge-discharge cycle test of the battery at the power. For example, in the case of a mobile phone, it is generally required that the aging index of the battery still meets the requirements after 800 or 1500 charge and discharge cycles. The aging index includes, for example, the DC resistance dcr of the battery, the capacity loss rate of the battery, and the like. Each charging and discharging cycle includes a standard charging process and a standard discharging process. During a standard charging process, use 0.5C to charge the battery, and stop charging when the cut-off current of the battery exceeds 0.02C. During a standard discharge process, use 0.2C to discharge the battery to obtain the standard capacity of the battery.

For the case where the rated voltage of the battery is 4.4V and the charging power is 40W, the above charging and discharging cycle test is carried out at an overvoltage charging voltage greater than the design charging voltage of the battery of 4.45V. After, for example, 800 charging and discharging cycles, the overvoltage charging voltage at which the battery aging index meets the requirements is determined as the overvoltage charging voltage corresponding to the charging power of 40W. For example, the overvoltage charging voltage corresponding to 40W charging power is 4.48V, which is 30mV higher than the design charging voltage of 4.45V.

In an embodiment, after the overvoltage charging voltage is determined, the cutoff charging current when the battery is charged with the overvoltage charging voltage to obtain the standard capacity of the battery is determined as the cutoff charging current. The cut-off charging current is greater than the designed cut-off charging current of the battery.

In an embodiment, after the constant voltage charging of the electronic device reaches the cut-off charging current by using the overvoltage charging voltage, the charging stops. The voltage of the battery then drops from the overvoltage charging voltage of 4.48V to the design charging voltage of 4.45V.

According to the same method as above, determine the voltage charging voltage and cut-off charging current under different power. For example, under the charging powers of 27W, 18W, and 10W, respectively, the charging voltage and cut-off charging current corresponding to these powers are determined.

The above-mentioned first temperature is, for example, 15-45° C., which is the normal temperature range of the battery. When the temperature does not fall within the first temperature range, that is, when the temperature falls within the second temperature range (low temperature section) lower than the first temperature range or the third temperature range higher than the first temperature range When the temperature (high temperature range) ranges, the charging method is executed: 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, stepwise charging the electronic device, And step S1303, if the maximum charging current is less than or equal to the maximum direct charging threshold current, directly charge the electronic device.

In an embodiment, the maximum charging current refers to the maximum charging current that the charger can provide. The maximum direct charging threshold current is determined by the battery cell and depends on the battery temperature. Similar to the above-mentioned overvoltage charging voltage and cut-off charging current, the maximum direct charging threshold current is predetermined through the charge-discharge cycle test of the battery at the temperature.

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

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

In an embodiment, the second temperature range includes a plurality of second temperature sub-ranges. That is to say, the low temperature section can be divided into multiple temperature sub-ranges, such as 0-10°C and 10-15°C. The maximum direct charging threshold current of each temperature sub-range is predetermined by the charge-discharge cycle test of the battery in each temperature sub-range.

Similarly, the third temperature range may comprise a plurality of third temperature sub-ranges. That is to say, the high temperature section above 45°C can be divided into multiple temperature sub-ranges. The maximum direct charging threshold current of each temperature sub-range is predetermined by the charge-discharge cycle test of the battery in each temperature sub-range.

According to an embodiment of the present disclosure, temperature is used as a criterion for judging fast charging and safe charging schemes. The characteristics of low temperature, normal temperature, and high temperature batteries are different, resulting in very strict selection of charging voltage and current at different temperatures. Therefore, when the charging power is determined, the temperature is used as the basis for choosing the charging method.

As mentioned above, in the normal temperature range of the battery, that is, 15-45°C, the battery is charged at a high speed, the overvoltage charging voltage is set to the design charging voltage + V1, and the cut-off current is set to the design cut-off charging current + i1. Here, V1 is the voltage increase of the overvoltage charging at the end of the extremely fast charging, and i1 is the charging cut-off current increased by the extremely fast charging.

Optionally, in the high and low temperature range of the battery, that is, the temperature range below 15°C and above 45°C, the battery can be charged using a conventional strategy, that is, charging with the designed charging voltage and the designed cut-off charging current CV.

The inventors found that the charging characteristics of the battery cells determine whether the maximum charging current of different powers of conventional charging is suitable for step charging or direct charging. i is the maximum charging current that the current power charger can output, and A is the limited maximum direct charging threshold current. When i>A, charge the battery stepwise: constant current of i to safe voltage V1, constant voltage of V1 to current A, constant current charging of A to rated voltage V, and constant voltage V charging to design cut-off charging current. When i≤A, directly charge the battery: i constant current value rated voltage V, rated voltage V constant voltage to design cut-off charging current.

The choice of direct charging and step charging for fast charging requires accurate setting of the direct charging limit current and voltage limit. Under high and low temperature conditions, the battery cell has its own maximum charging current, and also has a safety voltage (that is, the limit voltage point) that is temporarily higher than the maximum charge current. The charging current is appropriately increased for a short time. After reaching the limit voltage point, the constant voltage reaches the limit voltage point. The maximum limited current A, and then charge to full charge according to the conventional maximum constant current A CC/CV, which takes into account both safe charging and faster charging. For example, the maximum charging current from full charging to full charging is 5A to 4.4V, which can be charged to 4.25V with 6A for a short time, but cannot be charged directly to 4.4V with 6A. According to the embodiment of the present disclosure, step charging can be performed at 6A to 4.25V, and then transferred to 5A to charge to 4.4V.

According to the charging characteristics of different batteries, this solution adapts a set of safe and fast charging solutions for different power chargers and a set of extremely fast charging solutions to achieve safe charging and fast charging. A set of charging strategy tables based on different charging power and different temperature ranges are stored in the memory of the electronic device. When connected to the charger, identify the current charger power, look up the charging strategy under the current power in the table memory, and select a reasonable and safe charging solution. The charging strategy includes the following parameters, for example: the overvoltage charging voltage at the end of the ultra-fast charging at room temperature, the cut-off charging current matching the overvoltage charging; Charging threshold current A, B...; and high and low temperature step charging/direct charging charging methods.

FIG. 2 is a schematic diagram of a charging strategy according to an exemplary embodiment of the present disclosure. The charging strategy table may include a power 1 charging strategy group corresponding to power 1, a power 2 charging strategy group corresponding to power 2, . . . and a power N charging strategy group corresponding to power N. Each charging strategy group includes a charging strategy corresponding to each temperature range. According to an embodiment of the present disclosure, the identification of chargers with different powers provides an appropriate charging strategy. For example, the power 1 charging strategy group includes charging strategy 1 corresponding to the normal temperature range of 15-45°C, charging strategy 2 corresponding to the low temperature range of 0-10°C, charging strategy 3 corresponding to the low temperature range of 10-15°C....

In charging strategy 1, the battery is overcharged at the end of the charging phase. In charging strategies 2, 3..., according to the relationship between the maximum charging current that the charger can output and the maximum direct charging threshold current of the battery in each temperature range, it is determined whether to charge the electronic device stepwise or directly. The charging strategy parameters in charging strategy 1, ie, the overvoltage charging voltage and the cut-off charging current, are determined as described above. Similarly, the charging rate parameters in charging strategies 2, 3, . . . , ie, the maximum direct charging threshold current, are determined as described above. I won't repeat them here. According to the embodiments of the present disclosure, the charging strategies for different temperature ranges are customized to ensure the balance between battery safety and fast charging.

FIG. 3 is a schematic diagram of extremely 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 the charging process, and the right side is the voltage (V) of the battery during the charging process.

As shown in FIG. 3 , according to the related art, the conventional charging phase includes the front end of the charging phase, namely P1, P2 and P3 in the figure; and the end of the charging phase, namely P4 in the figure. In the P4 stage, the design charging voltage of the battery is usually used to charge the battery at a constant voltage until the current decreases to the design cut-off charging current. For example, for 40W power charging, the design charging voltage in the P4 stage is usually 4.45V. As further shown in FIG. 3 , according to an embodiment of the present disclosure, in the P4A stage, the voltage of the battery is rapidly raised to an overvoltage charging voltage, for example, 4.48V. Then in the P4B phase, the battery is charged with a constant voltage by using the overvoltage charging voltage until the current decreases to the cut-off charging current. As shown, the duration of the P4A and P4B phases of the embodiment of the present disclosure is much shorter than the duration of the P4 phase of the related art. This is the mechanism of extremely fast charging of the battery in the normal temperature range in the embodiments of the present disclosure.

In addition, as shown in Figure 3, in the P5 stage, after the constant voltage charging stops, the voltage of the battery drops from the overvoltage charging voltage of 4.48V to the design charging voltage of 4.45V.

In order to verify the charging effect of the above technology, the inventors conducted three sets of experiments, as shown in Tables 1, 2, and 3 below.

Table 1: Charging method 1

In charging mode 1, in the P1 stage, use 8A to charge to 4.25V; in the P2 stage, use 1.5C, CC to charge to 4.35V. In the P3 stage, using 1.3C, CC is charged to 4.45V, which is the designed charging voltage. Finally, in the P4 stage, the CV is charged to 200mA, which is the designed cut-off charging current. Charging mode 1 is non-overvoltage charging.

Table 2: Charging method 2

Charging method 2 is overvoltage charging. P1, P2, P3 stages are the same as charging mode 1. The difference is that the P4 phase is replaced by the P4A and P4B phases. In the P4A stage, use 1C, CC to 4.48V, which is the overvoltage charging voltage. In the P4B stage, CV is charged to the cut-off charging current of 0.15C, which is greater than the above-mentioned design cut-off charging current.

Table 3: Charging method 3

Charging mode 3 is overvoltage charging. P1, P2, P3 stages are the same as charging mode 2. The difference is that in the P4A stage, using 1C, CC to 4.5V, which is a higher overvoltage charging voltage. In the P4B stage, the CV is charged to the cut-off charging current of 0.21C, and the increase of the cut-off charging current relative to the above design is larger than that of charging mode 2.

From the full charge time in the above table (that is, the data in the 100% SOC column), it can be seen that the full charge time of charging mode 2 is 17.4 minutes lower than that of charging mode 1. Compared with charging method 1, the full charge time of charging method 3 is reduced by 21.5 minutes.

The embodiments of the present disclosure bring the following beneficial technical effects: on the one hand, safer charging is realized. Under different temperature ranges, the limit direct charge of the battery cell and the limit step charge are combined to ensure that the battery is not over-charged or under-voltage charged, and the risk of battery aging and heat is reduced. Charging at different power levels, adapting to the charging strategy of the battery cell matching, improves the safety and cycle life of the battery. On the other hand, faster charging is achieved. Different power chargers have different overvoltage charging methods, making overvoltage charging universal and popular, and no matter what kind of charger you can get a more excellent charging speed. Under high and low temperature conditions, direct charging and step charging are fully combined to release the best charging performance of the battery.

Fig. 4 is a block diagram of a charging device 400 according to an exemplary embodiment of the present disclosure. The charging device 400 is applied to the electronic equipment to be charged, including: a power identification module 401, which identifies the power of the charger after monitoring that the electronic equipment is connected to the charger; a temperature determination module 402, which determines the temperature of the electronic equipment. the temperature of the battery; and the charging strategy determination module 403, which determines the charging strategy of the electronic device according to the power and the temperature, wherein different powers correspond to different charging strategies, and the charging strategy includes when the temperature falls within the first In a temperature range, the electronic device is charged at a constant voltage at the end of the charging phase by using an overvoltage charging voltage corresponding to the power and a cut-off charging current.

In one embodiment, the overvoltage charging voltage is predetermined through the charge-discharge cycle test of the battery at the power, and is greater than the design charging voltage of the battery, and the cut-off charging current is at The cut-off charging current when charging the battery with the overvoltage charging voltage to obtain the standard capacity of the battery is greater than the design cut-off charging current of the battery.

In another embodiment, after the constant voltage charging of the electronic device by using the overvoltage charging voltage and the cut-off charging current is stopped, the voltage of the battery drops from the overvoltage charging voltage to the designed charging voltage. Voltage.

In still another embodiment, 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, if the maximum charge of the charger If the current is greater than the maximum direct charging threshold current of the battery at the temperature, the electronic device is charged stepwise, and if the maximum charging current is less than or equal to the maximum direct charging threshold current, the electronic device is directly charged .

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

In yet another embodiment, the step charging includes: using the maximum charging current to charge with a constant current to a safe voltage, using the safe voltage to charge with a constant voltage to the maximum direct charging threshold current, using the maximum direct charging threshold Current constant current charging to the rated voltage of the battery, and using the rated voltage constant voltage charging to the design cut-off charging current, wherein the safe voltage refers to the limit of the battery current greater than the maximum direct charging threshold voltage, and the safe voltage is lower than the rated voltage.

In yet another embodiment, the direct charging includes: using the maximum charging current for constant current charging to the rated voltage of the battery, and using the rated voltage for constant voltage charging to the design cut-off charging current.

In yet another embodiment, the second temperature range includes a plurality of second temperature subranges, and the maximum direct charging threshold current is obtained by charging the battery under each of the plurality of second temperature subranges. Pre-determined by discharge cycle test.

In yet another embodiment, the third temperature range includes a plurality of third temperature subranges, and the maximum direct charging threshold current is obtained by charging the battery under each of the plurality of third temperature subranges. Pre-determined by discharge cycle test.

Fig. 5 is a block diagram of an electronic device 500 according to an exemplary 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, a fitness device, a personal digital assistant, and the like.

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

The processing component 502 generally controls the overall operations of the electronic device 500, such as those associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 502 may include one or more processors 520 to execute instructions to complete all or part of the steps of the above method. Additionally, processing component 502 may include one or more modules that facilitate interaction between processing component 502 and other components. For example, processing component 502 may include a multimedia module to facilitate interaction between multimedia component 508 and 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 the like. The memory 504 can be implemented by any type of volatile or non-volatile storage device or their combination, 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 Disk.

The power component 506 provides power to various components of the electronic device 500 . Power components 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for electronic device 500 .

The multimedia component 508 includes a screen providing an output interface between the electronic device 500 and the 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 input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may not only sense a boundary of a touch or swipe action, but also detect duration and pressure associated with the touch or swipe action. In some embodiments, the multimedia component 508 includes a front camera and/or a rear camera. When the electronic device 500 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have 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), which is configured to receive external audio signals when the electronic device 500 is in operation modes, such as call mode, recording mode and voice recognition mode. Received audio signals may be further stored in memory 504 or sent via communication component 516 . In some embodiments, the audio component 510 also includes a speaker for outputting audio signals.

The I/O interface 512 provides an interface between the processing component 502 and a peripheral interface module. The peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include, but are not limited to: a home button, volume buttons, start button, and lock button.

Sensor assembly 514 includes one or more sensors for providing status assessments of various aspects of electronic device 500 . For example, the sensor assembly 514 can detect the open/close state of the electronic device 500, the relative positioning of the components, such as the display and the keypad of the electronic device 500, the sensor assembly 514 can also detect the electronic device 500 or one of the electronic device 500 The position of components changes, the presence or absence of user contact with the electronic device 500 , the orientation or acceleration/deceleration of the electronic device 500 and the temperature of the electronic device 500 change. Sensor assembly 514 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. Sensor assembly 514 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 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 wired or wireless communication between the electronic device 500 and other devices. The electronic device 500 can access a wireless network based on communication standards, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 516 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra Wide Band (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, 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 A programmable gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation for performing the methods described above.

In an exemplary embodiment, there is also provided a non-transitory computer-readable storage medium including instructions, such as the memory 504 including instructions, which can be executed by the processor 520 of the electronic device 500 to complete the above method. For example, the non-transitory computer readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.

It can be further understood that "plurality" in the present disclosure refers to two or more, and other quantifiers are similar thereto. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character "/" generally indicates that the contextual objects are an "or" relationship. The singular forms "a", "said" and "the" are also intended to include the plural unless the context clearly dictates otherwise.

It can be further understood that the terms "first", "second", etc. are used to describe various information, but the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not imply a specific order or degree of importance. In fact, expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of the present disclosure, first information may also be called second information, and similarly, second information may also be called first information.

It can be understood that although operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring that these operations be performed in the specific order shown or in a serial order, or that operations be performed in a specific order. Do all of the operations shown to get the desired result. In certain circumstances, multitasking and parallel processing may be advantageous.

Other embodiments of the invention will be readily 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 modification, use or adaptation of the present invention, these modifications, uses or adaptations follow the general principles of the present invention and include common knowledge or conventional technical means in the technical field not disclosed in this disclosure . The specification and examples are to be considered exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It should be understood that the present invention is not limited to the precise constructions which have been described above and shown in the accompanying drawings, and 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 (10)

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;

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: 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;

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.

6. A charging arrangement as claimed in claim 5,

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.

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.

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