WO2020061983A1 - Charge control method and electronic device - Google Patents

Abstract

A charge control method and an electronic device, the method comprising: after establishing a physical connection with a power adapter, determining whether a charging current value of a charging battery (702) is greater than a first preset multiple of a charging current limiting value (S101); when the charging current value of the charging battery (702) is greater than the first preset multiple of the charging current limiting value, controlling the power adapter to enter an output voltage locking mode, wherein, when the power adapter is in the output voltage locking mode, the charging battery (702) of an electronic device is in a constant current charging state (S102); when the charging current value of the charging battery (702) is smaller than or equal to the first preset multiple of the charging current limiting value, controlling the power adapter to enter a dynamic voltage regulating mode, wherein, when the power adapter is in the dynamic voltage regulating mode, the charging battery (702) of the electronic device is in a constant voltage charging state (S103). By means of the embodiments, power loss during charging may be reduced and charging efficiency may be effectively improved.

Description

Charging control method and electronic device Technical field

The present invention relates to the field of electronic technology, and in particular, to a charging control method and an electronic device.

Background technique

With the development of society, smart devices are more and more popular with consumers. In order to reduce the charging time of smart devices, fast charging technology came into being. In the existing fast charging scheme, the smart device communicates with the power adapter to regulate the output voltage of the power adapter.

The smart device monitors the charging voltage and charging current of the rechargeable battery to determine whether the input voltage and input current of the smart device meet the power requirements of the rechargeable battery. In order to meet the different needs for power of the rechargeable battery in different charging stages, the smart device continuously controls the power adapter to gradually increase or decrease a specific voltage value to adjust the output voltage of the power adapter.

In the current fast charging solution, the specific voltage value used to adjust the output voltage is usually large each time, so that the output voltage of the power adapter cannot be accurately fixed at the voltage point required by the rechargeable battery, but will surround the rechargeable battery. The required voltage point is constantly changing. And such a jump will make the power adapter always unable to accurately work at the proper voltage point, which will cause efficiency loss.

Summary of the Invention

The embodiment of the invention discloses a charging control method and an electronic device, which can reduce the power loss in the charging process and effectively improve the charging efficiency.

The first aspect of the embodiments of the present invention discloses a charging control method applied to an electronic device, the electronic device is connected to a power adapter through a charging cable, the electronic device includes a rechargeable battery, and the method includes:

After establishing a physical connection with the power adapter, determining whether a charging current value of the rechargeable battery is greater than a charging current limit value of a first preset multiple;

And controlling the power adapter to enter an output voltage lock mode when a charging current value of the rechargeable battery is greater than a charging current limit value of the first preset multiple, wherein when the power adapter is in the output voltage lock mode The rechargeable battery of the electronic device is in a constant current charging state;

When the charging current value of the rechargeable battery is less than or equal to the charging current limit value of the first preset multiple, controlling the power adapter to enter a dynamic voltage regulation mode, wherein when the power adapter is in the dynamic voltage regulation In the mode, the rechargeable battery of the electronic device is in a constant voltage charging state.

According to a second aspect of the embodiments of the present invention, an electronic device is disclosed. The electronic device is connected to a power adapter through a charging cable. The electronic device includes a processor and a rechargeable battery. The processor is configured to:

After the electronic device and the power adapter establish a physical connection, determine whether a charging current value of the rechargeable battery is greater than a charging current limit value of a first preset multiple;

And controlling the power adapter to enter an output voltage lock mode when a charging current value of the rechargeable battery is greater than a charging current limit value of the first preset multiple, wherein when the power adapter is in the output voltage lock mode The rechargeable battery of the electronic device is in a constant current charging state;

When the charging current value of the rechargeable battery is less than or equal to the charging current limit value of the first preset multiple, controlling the power adapter to enter a dynamic voltage regulation mode, wherein when the power adapter is in the dynamic voltage regulation In the mode, the rechargeable battery of the electronic device is in a constant voltage charging state.

A third aspect of the embodiments of the present invention discloses a computer-readable storage medium applied to an electronic device, the electronic device is connected to a power adapter through a charging cable, the electronic device includes a rechargeable battery, and the computer-readable storage medium Instructions are stored in the computer. When the instructions are run on the computer, the computer is caused to perform the following steps:

After the electronic device and the power adapter establish a physical connection, determine whether a charging current value of the rechargeable battery is greater than a charging current limit value of a first preset multiple;

And controlling the power adapter to enter an output voltage lock mode when a charging current value of the rechargeable battery is greater than a charging current limit value of the first preset multiple, wherein when the power adapter is in the output voltage lock mode The rechargeable battery of the electronic device is in a constant current charging state;

When the charging current value of the rechargeable battery is less than or equal to the charging current limit value of the first preset multiple, controlling the power adapter to enter a dynamic voltage regulation mode, wherein when the power adapter is in the dynamic voltage regulation In the mode, the rechargeable battery of the electronic device is in a constant voltage charging state.

In the embodiment of the present invention, after a physical connection is established between the electronic device and the power adapter, it is first determined whether the value of the charging current of the rechargeable battery is greater than the charging limit value of the first preset multiple. If not, the power adapter is controlled to enter a dynamic voltage regulation mode, wherein the rechargeable battery is in a constant current charging state in the output voltage lock mode, and the rechargeable battery is in a constant voltage charging state in the dynamic voltage regulating mode, thereby reducing power loss during charging , Effectively improve the charging efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings according to these drawings without paying creative labor.

1 is a flowchart of a charging control method disclosed by a first embodiment of the present invention;

2 is a schematic diagram of a correspondence relationship between a voltage region and a charging current limit value disclosed in an embodiment of the present invention;

3 is a flowchart of a charging control method disclosed by a second embodiment of the present invention;

4 is a flowchart of a charging control method disclosed by a third embodiment of the present invention;

FIG. 5 is a flowchart of a method for determining the most advantageous efficiency according to an embodiment of the present invention; FIG.

6 is a flowchart of a method for verifying a voltage change according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an electronic device disclosed by an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The charging control method provided by the embodiment of the present invention requires the electronic device and the power adapter to be completed together. The electronic device includes a rechargeable battery and a power management chip. The charge management chip is connected to the rechargeable battery and forms a charging path. The electronic device and the power adapter are connected through a charging cable, and the electronic device establishes a physical connection and a communication connection with the power adapter through the charging cable. In one embodiment, the electronic device and the power adapter further include a storage unit for storing data. The charging control method and the electronic device provided by the embodiments of the present invention can reduce the power loss in the charging process and effectively improve the charging efficiency, which are described in detail below respectively.

Please refer to FIG. 1, which is a flowchart of a charging control method according to a first embodiment of the present invention. The charging control method described in this embodiment includes:

Step S101: After the electronic device establishes a physical connection with the power adapter, determine whether the charging current value of the rechargeable battery is greater than the charging current limit value of the first preset multiple; if yes, go to step S102; if not, go to step S103.

In the embodiment of the present invention, the electronic device and the power adapter establish a physical connection through a charging cable, and the charging cable may be a Universal Serial Bus (USB) charging cable. The electronic device can communicate with the power adapter through a charging cable. After a physical connection is established between the electronic device and the power adapter, an initial value (for example, 5V) of the output voltage of the power adapter is first set. The initial value of the output voltage of the power adapter can be preset by the power adapter; it can also be set by the electronic device through a specific instruction. The electronic device sets the initial value of the output voltage through a specific instruction. Specifically, the electronic device sends an initial voltage setting instruction to the power adapter. The initial voltage setting instruction carries the initial value of the output voltage of the power adapter, and the power adapter receives the electronic device. After the initial voltage setting instruction is sent, the output voltage value of the power adapter is set to the initial output voltage value in response to the initial voltage setting instruction.

Further, the electronic device sets a charging current limit, that is, sets a charging current limit value of the rechargeable battery. In one embodiment, the electronic device first obtains the current charging voltage value V _{BAT of the} rechargeable battery through the charge management chip; then determines the charging voltage interval to which the current charging voltage value V _BAT belongs, and determines the charging of the rechargeable battery according to the charging voltage interval. The maximum value of the current, and the maximum value of the charging current is taken as the charging current limit value I _{CHRGLIM of} the rechargeable battery.

Please refer to FIG. 2 together, which is a schematic diagram illustrating a correspondence relationship between a voltage region and a charging current limit value according to an embodiment of the present invention. As shown in FIG. 2, assuming that the voltage interval to which the charging voltage value V _BAT belongs is (3.8V, 4.2V), that is, 3.8V <V _BUS ≦ 4.2V, then the charging current limiting value of the rechargeable battery I _CHRGLIM = 3.5A.

It should be noted that the charging current limiting value I _CHRGLIM is the maximum charging current value supported by the rechargeable battery. It is related to the performance of the rechargeable battery and can be a value preset by the electronic device or the user; the charging voltage value V _BAT belongs to the charging voltage The mapping relationship between the interval and the charging current limit value I _CHRGLIM is preset and can be stored in a storage unit of the electronic device.

Further, after the setting of the charging current limit value I _{CHRGLIM of the} rechargeable battery is completed, the electronic device obtains the current charging current value I _{CHRG of the} rechargeable battery through the charge management chip, and determines whether the current charging current value I _{CHRG of the} rechargeable battery is greater than the first preset value. Set the charging current limit value of the rechargeable battery at a multiple; for example, the first preset multiple may be 0.9, that is, determine whether I _CHRG is greater than 0.9 * I _CHRGLIM . When the current charging current value of the rechargeable battery is greater than the charging current limit value of the rechargeable battery of the first preset multiple, step S102 is performed; when the current charging current value of the rechargeable battery is less than or equal to the charging limit of the rechargeable battery of the first preset multiple Flow value, step S103 is executed.

Step S102: The electronic device controls the power adapter to enter an output voltage lock mode.

In the embodiment of the present invention, when the current charging current value of the rechargeable battery is greater than the charging current limit value I _{CHRGLIM of the} first preset multiple, the electronic device sends a first mode adjustment instruction to the power adapter, and the power adapter receives the first mode adjustment instruction After that, set the charging mode of the power adapter to the output voltage lock mode. Among them, when the power adapter is in the output voltage lock mode, the rechargeable battery of the electronic device is in a constant current charging state, that is, the charging current value of the rechargeable battery remains substantially unchanged.

Step S103: The electronic device controls the power adapter to enter a dynamic voltage regulation mode.

In the embodiment of the present invention, when the current charging current value of the rechargeable battery is less than or equal to the first current limit charge limit value I _CHRGLIM , the electronic device sends a second mode adjustment instruction to the power adapter, and the power adapter receives the second mode After adjusting the command, set the charging mode of the power adapter to the dynamic voltage regulation mode. Wherein, when the power adapter is in a dynamic voltage regulation mode, the rechargeable battery of the electronic device is in a constant voltage charging state, that is, the charging voltage value of the rechargeable battery remains substantially unchanged.

In the embodiment of the present invention, the charging process is divided into two charging modes: an output voltage lock mode and a dynamic voltage regulation mode. In the constant current area capable of maintaining high current charging, the power demand of the rechargeable battery is large, and the electronic device is sensitive to the charging efficiency, that is, the charging efficiency is an important demand factor when the electronic device is charged. At this time, the charging mode of the power adapter is changed. Set to output voltage lock mode, that is, the output voltage V _{BUS of the} power adapter is not allowed to jump frequently, and the output voltage V _{BUS is} controlled to remain unchanged, so that the rechargeable battery is in a constant current charging state, which can keep the rechargeable battery stable and large. The charging current reduces the charging time. As the charging process of the rechargeable battery gradually enters the constant voltage zone, a larger charging current cannot be maintained, the power demand of the rechargeable battery gradually decreases, and the electronic device is no longer sensitive to the charging efficiency, that is, the charging efficiency is no longer when the electronic device is charged. In this case, the charge management chip of the electronic device determines the power demand of the rechargeable battery in real time. The electronic device controls the power adapter to adjust its output voltage value V _BUS according to the determined power demand, that is, the output voltage of the power adapter is allowed. The value V _BUS changes frequently so that the rechargeable battery is in a constant voltage charging state, which can make the electronic device work at a lower energy consumption level and reduce power loss.

In the embodiment of the present invention, after the physical connection between the electronic device and the power adapter is established, it is first determined whether the charging current value of the rechargeable battery is greater than the first preset multiple of the charging current limit value, and if so, controlling the power adapter to enter the output voltage lock mode, If not, the power adapter is controlled to enter a dynamic voltage regulation mode, wherein the rechargeable battery is in a constant current charging state in the output voltage lock mode, and the rechargeable battery is in a constant voltage charging state in the dynamic voltage regulating mode, thereby reducing power loss during charging. , Effectively improve the charging efficiency.

Please refer to FIG. 3, which is a flowchart of a charging control method according to a second embodiment of the present invention. The charging control method described in this embodiment includes:

Step S301: After the electronic device establishes a physical connection with the power adapter, set the initial value of the output voltage of the power adapter.

Step S302: The electronic device obtains a charging voltage value of the rechargeable battery, and sets a charging current limit value of the rechargeable battery according to the charging voltage value of the rechargeable battery.

Step S303: The electronic device determines whether the charging current value of the rechargeable battery is greater than a charging current limit value of a first preset multiple; if yes, step S304 is performed; if not, step S311 is performed.

It should be noted that, for implementation manners of steps S301 to S303, reference may be made to the foregoing description, and details are not described herein again.

Step S304: The electronic device controls the power adapter to enter an output voltage lock mode.

Step S305: The electronic device acquires the current charging current value of the rechargeable battery at a preset time interval.

In the embodiment of the present invention, the electronic device obtains the current charging current value I _{CHRG of the} rechargeable battery once through a charge management chip at a preset time interval (for example, 10S).

Step S306: The electronic device determines whether the current value of the charging current of the rechargeable battery is greater than the charging current limit value of the first preset multiple; if yes, returns to step S305; if not, executes step S307.

In the embodiment of the present invention, when the current value of the charging current of the obtained rechargeable battery is greater than the charging current limit value of the first preset multiple, for example, when I _CHRG > 0.9 * I _CHRGLIM , the electronic device returns to execute step S305. When the obtained current value of the charging current of the rechargeable battery is less than or equal to the charging current limit value of the first preset multiple, for example, when I _{CHRG ≦} 0.9 * I _CHRGLIM , the electronic device executes step S307.

Step S307: The electronic device determines whether the current output voltage value of the power adapter is greater than or equal to a preset output voltage threshold of the power adapter. If yes, go to step S311; if no, go to step S308.

The preset output voltage threshold of the power adapter can be the maximum output voltage value of the power adapter. The maximum output voltage value of the power adapter is related to the performance of the power adapter and can be obtained from the hardware parameters of the power adapter.

In the embodiment of the present invention, when it is determined that the current value of the charging current of the rechargeable battery is less than or equal to the first preset multiple of the charging current limit value, the electronic device sends an output voltage acquisition instruction to the power adapter, and the power adapter receives the output voltage acquisition instruction After that, the current output voltage value of the power adapter is sent to the electronic device. After receiving the current output voltage value of the power adapter, the electronic device determines whether the current output voltage value of the power adapter is greater than or equal to the output voltage threshold value preset by the power adapter; if the current output voltage value of the power adapter is less than the output voltage preset by the power adapter Step S308; if the current output voltage value of the power adapter is greater than or equal to the output voltage threshold preset by the power adapter, it means that the rechargeable battery is difficult to maintain a constant current charging state, and the electronic device locks the charging mode of the power adapter from the output voltage The mode is switched to the dynamic voltage regulation mode. As such, the electronic device executes step S311.

Step S308: The electronic device controls the power adapter to perform boost adjustment on the output voltage of the power adapter.

In the embodiment of the present invention, if the current output voltage value of the power adapter is less than the output voltage threshold preset by the power adapter, a boosting attempt is performed to maintain the original charging current, that is, to keep the rechargeable battery in a constant current charging state. Specifically, the electronic device sends a boosting instruction to the power adapter. The boosting instruction carries an output voltage boosting value (for example, _ΔV ). After the power adapter receives the boosting instruction, it increases the output voltage value V _{BUS of the} power adapter by _Δ V , That is, the output voltage value of the power adapter is adjusted to V _BUS + _△ V. After the electronic device controls the power adapter to perform boost adjustment on the output voltage of the power adapter, it proceeds to step S309;

Step S309: The electronic device determines whether the output voltage value after the boost adjustment of the power adapter is greater than or equal to a preset output voltage threshold of the power adapter. If yes, go to step S310; if no, go to step S310.

Step S310: The electronic device obtains a charging current value of the rechargeable battery after the boost adjustment, and determines whether the charging current value of the rechargeable battery after the boost adjustment is greater than a charging current limit of the first preset multiple. Value; if yes, go back to step S305; if not, go to step S311.

In the embodiment of the present invention, when the electronic device detects that the output voltage value of the power adapter after the boost adjustment is less than the output voltage threshold preset by the power adapter, and the charging current value of the rechargeable battery after the boost adjustment is still less than or equal to the first Setting a multiple of the charging current limit value indicates that it is difficult for the rechargeable battery to maintain a constant current charging state. The electronic device switches the charging mode of the power adapter from the output voltage lock mode to the dynamic voltage regulation mode. Thus, the electronic device executes step S311. When the electronic device detects that the output voltage value after the boost adjustment of the power adapter is smaller than a preset output voltage threshold value of the power adapter, and the charging current value of the rechargeable battery after the boost adjustment is greater than the first current limit charging limit value, It indicates that the constant current charging state of the rechargeable battery is successfully maintained, and the electronic device returns to step S305.

In an embodiment, after the electronic device controls the power adapter to perform a boost adjustment on the output voltage of the power adapter, if the electronic device detects that the output voltage value of the power adapter after the boost adjustment is less than a preset output voltage threshold of the power adapter, and The charge current value of the rechargeable battery after the boost adjustment is still less than or equal to the first preset multiple of the charging current limit value, then the power adapter is controlled to perform a second boost adjustment on the output voltage of the power adapter, that is, the output voltage of the power adapter The value is adjusted to V _BUS + 2 * _△ V. After the electronic device performs the second boosting adjustment on the output voltage of the power adapter, steps S309 and S310 are performed. When the charging current value is still less than or equal to the charging current limit value of the first preset multiple after the second boosting adjustment, it indicates that the rechargeable battery will enter the constant voltage charging state from the constant current charging state.

Step S311: The electronic device controls the power adapter to enter a dynamic voltage regulation mode.

Step S312: The electronic device obtains a current output voltage value of the power adapter, compares the current output voltage value of the power adapter with a preset output voltage value of the power adapter, and determines the current Whether the difference between the output voltage value and the preset output voltage value is greater than the preset voltage difference; if yes, step S313 is performed; if not, step S314 is performed.

In the embodiment of the present invention, after the charging mode of the power adapter is set to or switched to the dynamic voltage regulation mode, the electronic device sends an output voltage acquisition instruction to the power adapter, and after the power adapter receives the output voltage acquisition instruction, it changes the current The output voltage value is sent to the electronic device. After receiving the current output voltage value of the power adapter, the electronic device compares the current output voltage value of the power adapter with a preset output voltage value of the power adapter, where the preset output voltage value of the power adapter can be a set power source The initial output voltage of the adapter.

Step S313: The electronic device controls the power adapter to perform step-down adjustment on the output voltage of the power adapter.

In the embodiment of the present invention, when the absolute value of the difference between the preset output voltage value of the power adapter and the current output voltage value of the power adapter is greater than the preset voltage difference (for example, V _TH ), it means that the load is too large, and the input The power cannot meet the requirements of the rechargeable battery. At this time, the output voltage of the power adapter needs to be adjusted by step-down. Specifically, after the electronic device transmits the adjustment instruction to the step-down power adapter, carrying the buck output voltage of the buck adjustment command value (e.g., _△ V1), the power adapter receives a command buck regulator, the output voltage value V _BUS power adapter Decrease _△ V1, that is, adjust the output voltage value of the power adapter to V _{BUS- △} V1 to meet the power demand of the rechargeable battery and keep the rechargeable battery in a constant voltage charging state.

Step S314: The electronic device controls the power adapter to perform boost adjustment on the output voltage of the power adapter.

In the embodiment of the present invention, when the absolute value of the difference between the preset output voltage value of the power adapter and the current output voltage value of the power adapter is less than or equal to the preset voltage difference V _TH , it indicates the current output voltage of the power adapter. It is not enough to support the demand for charging the rechargeable battery. Therefore, the output voltage of the power adapter needs to be adjusted by boosting. Specifically, after the electronic device transmits the adjustment instruction to boost the power adapter, carrying the boost output voltage boost adjustment command value (e.g., _△ V2), the power adapter receives a command to adjust the pressurization, the output voltage value V _BUS power adapter Increase _△ V2, that is, adjust the output voltage value of the power adapter to V _BUS + _△ V2 to keep the rechargeable battery in a constant voltage charging state. Incidentally, the value of _△ V1 and _△ V2 may be the same or different.

In an embodiment, after the electronic device performs one or more step-down adjustments on the output voltage of the power adapter, or after one or more step-up adjustments on the output voltage of the power adapter, that is, the electronic device After the device performs step S313 or step S314, the electronic device returns to step S302. Until the charging of the rechargeable battery is complete, the entire process ends. The above method can be used to divide the charging cycle of the rechargeable battery into several stages. Each stage is set with different charging current limit I _CHRGLIM . Different charging current limit I _CHRGLIM will change the output voltage of the power adapter V _BUS lock accordingly The conditions, that is, the conditions for setting the charging mode of the power adapter to the output voltage lock mode or the dynamic voltage regulation mode are changed accordingly. The embodiments of the present invention can effectively reduce the power loss caused by the impedance of the charging cable, can limit the power and optimize the charging efficiency, and can also reduce the temperature rise of components during charging, thereby extending the service life of the electronic device and the power adapter.

It should be noted that the electronic device and the power adapter can also be connected for charging and communication by wireless connection; the output voltage value of the power adapter can also be replaced by the input voltage value of the electronic device. For the charging control method, reference may be made to the above description, and details are not described herein again.

In the embodiment of the present invention, after the physical connection between the electronic device and the power adapter is established, it is first determined whether the charging current value of the rechargeable battery is greater than the first preset multiple of the charging current limit value, and if so, controlling the power adapter to enter the output voltage lock mode, If not, the power adapter is controlled to enter a dynamic voltage regulation mode, wherein the rechargeable battery is in a constant current charging state in the output voltage lock mode, and the rechargeable battery is in a constant voltage charging state in the dynamic voltage regulating mode, thereby reducing power loss during charging. , Effectively improve the charging efficiency.

After the electronic device sets the charging mode of the power adapter to the output voltage lock mode, before the output voltage value V _{BUS of the} power adapter is locked, the electronic device first determines the optimal operating point, that is, when the charging efficiency is the highest during the charging process. Corresponding target output voltage value. Referring to FIG. 4, compared to the method shown in FIG. 3, the charging control method provided in another embodiment further includes the following steps after step S304 and before step 305:

Step S3041, the electronic device controls the power adapter to adjust the output voltage value of the power adapter so that the charging current value of the rechargeable battery is within the first preset multiple of the charging current limit value and the second preset multiple. Charging current limit value.

In the embodiment of the present invention, the second preset multiple is greater than the first preset multiple. The second preset multiple may be, for example, 1.1, and the first preset multiple may be, for example, 0.9. The electronic device gradually increases the output voltage value of the power adapter by controlling the power adapter to gradually increase the charging current value of the rechargeable battery from the charging current limit value of the first preset multiple to the charging current limit value of the second preset multiple. For example, the charging current value of the rechargeable battery is gradually increased from 0.9 * I _CHRGLIM to 1.1 * I _CHRGLIM .

Step S3042, in the process of adjusting the output voltage value of the power adapter, the electronic device calculates conversion efficiency values corresponding to different charging current values of the rechargeable battery, and sets the power source corresponding to the maximum conversion efficiency value The output voltage value of the adapter is determined as the target output voltage value.

In the embodiment of the present invention, in the process of controlling the power adapter to adjust the output voltage value, the electronic device calculates the conversion efficiency corresponding to all the charging current values during the adjustment process, and determines the charging current value and the output voltage value corresponding to the maximum conversion efficiency. It is the optimal operating point of efficiency, and the output voltage value of the power adapter corresponding to the maximum conversion efficiency is determined as the target output voltage value. Among them, the conversion efficiency is equal to the power obtained by the rechargeable battery divided by the power output by the power adapter. The calculation formula is:

As shown in formula (1), η is the conversion efficiency value, which is a ratio; V _BAT and I _CHRG are the charging voltage value and charging current value of the rechargeable battery; V _BUS and I _IN are the output voltage value and Output current value. It should be noted that formula (1) can be optimized according to the impedance value of the charging cable.

Please refer to FIG. 5 together. FIG. 5 is a flowchart of a method for determining the most advantageous efficiency according to an embodiment of the present invention. As shown in FIG. 5, it is assumed that the first preset multiple is 0.9 and the second preset multiple is 1.1. The charging current limit value of the rechargeable battery is I _CHRGLIM , and the output voltage value of the power adapter is V _BUS . First, the electronic device obtains the charging current value I _{CHRG0 of the} rechargeable battery, and judges whether I _CHRG0 is less than or equal to 1.1 * I _CHRGLIM ; if not, the power adapter is controlled to reduce the output voltage V _{BUS of the} power adapter by _Δ V3, and obtain the step-down adjustment again The charging current value of the subsequent rechargeable battery; if it is, the output voltage value V _{η at the} higher efficiency point is set to the output voltage value V _BUS corresponding to the charging current value I _CHRG0 . Then, the electronic device controls the power adapter to increase the output voltage value V _{BUS of the} power adapter by _Δ V4 to obtain the charging current value I _CHRG1 of the rechargeable battery after the boost adjustment and determine whether I _CHRG1 is less than or equal to 1.1 * I _CHRGLIM ; if not, Then the output voltage value V _{ηmax at the} highest efficiency point is set to V _η , that is, V _{ηmax is} set to the output voltage value corresponding to I _CHRG0 , and this process is ended, where the output voltage value V _{ηmax at} the highest efficiency point is The target output voltage value; if it is, it is determined whether the conversion efficiency corresponding to the charging current value I _CHRG0 is _higher than the conversion efficiency corresponding to the charging current value I _CHRG1 . If the charging current value _I CHRG0 conversion efficiency corresponding to the relative value of the charging current _I CHRG1 corresponding conversion efficiency is not increased, the recording _I CHRG0 corresponding to the output voltage value V _BUS higher efficiency point output voltage _V η, and performs the high efficiency of the output voltage value _V η point setting step and the subsequent steps is the charging current value _I CHRG0 corresponding to an output voltage value; when the charging current value _I CHRG0 conversion efficiency corresponding to the relative value of the charging current corresponding to the converted _I CHRG1 If the efficiency has increased, record the output voltage value V _BUS corresponding to I _CHRG1 as the output voltage value V _η at the higher efficiency point, and execute setting the output voltage value V _{η at the} higher efficiency point to the charging current value I _CHRG1 . Steps and subsequent steps for outputting voltage values. Incidentally, the value of _{△ △} V4 V3 and may be the same or different; In the above process, the charging current should remain larger than the value of the charging of the battery is _0.9 * I CHRGLIM.

Step S3043: The electronic device controls the power adapter to adjust an output voltage value of the power adapter to the target output voltage value.

In the embodiment of the present invention, after determining the target output voltage value, the electronic device sends a voltage adjustment instruction to the power adapter, and the voltage adjustment instruction carries the target output voltage value; after the power adapter receives the voltage adjustment instruction, it sends the output voltage of the power adapter The value is adjusted to the target output voltage value. When the charging mode of the power adapter is the output voltage lock mode, the power adapter controls the output voltage value to stay at the target output voltage value or change within a small range, that is, to lock the output voltage value of the power adapter at the target output Voltage value.

In the embodiment of the present invention, after the charging mode of the power adapter is set to the output voltage lock mode, the output voltage value of the power adapter is adjusted to the target output voltage value corresponding to the maximum conversion efficiency, which can maintain a large charging current. Under the premise, the voltage point with the best conversion efficiency is selected to continuously charge the rechargeable battery in a certain interval. For a constant current charging stage with a high demand for charging power, maintaining a high charging efficiency can significantly reduce the component's heat generation. , And can increase the charging speed of the rechargeable battery and shorten the charging time.

In one embodiment, the electronic device first performs a voltage change verification after the output voltage of the power adapter is increased or decreased. Specifically, please refer to FIG. 6 together. FIG. 6 is a flowchart of a voltage change verification method according to an embodiment of the present invention. As shown in FIG. 6: each time the output voltage of the power adapter is adjusted to increase or decrease _△ After V5 (for example, 0.2V), the electronic device obtains the current actual output voltage value V _BUS1 of the power adapter and compares V _BUS1 with the actual output voltage value V _BUS2 of the power adapter obtained before the output voltage adjustment; if _△ V6 = | V _BUS1 -V _BUS2 | Within a preset voltage change interval (for example, (0.1V, 0.3V)), that is, 0.1V < _△ V6 <0.3V, it is deemed to meet the requirements, and the voltage change verification is passed. Perform the next steps and the next voltage change operation.

Further, if _{△ V6 = | V BUS1 -V BUS2} | voltage change in a predetermined interval (e.g. (0.1V, 0.3V)) outside, that is, _{△ V6≥0.3V} or _{△ V6≤0.1V,} the voltage variation If the verification fails, the verification fails. At this time, the current actual output voltage value of the power adapter needs to be obtained after a preset time interval to calculate the value of _△ V6 for re-verification. For the verification method, refer to the above description. I will not repeat them here. If the voltage change verification fails for more than a preset number of times (for example, 5 times), it is determined that the verification fails and the verification process ends; at this time, the electronic device determines that the electronic device or the power adapter has failed during the charging process and disconnects the charging To stop charging the rechargeable battery. Further, the electronic device outputs prompt information, which is used to prompt the user that a failure occurs during the charging process, so that the user can disconnect the power adapter from the electronic device, thereby avoiding damage to the power adapter or the electronic device.

According to the charging control method provided by the embodiment of the present invention, two charging modes are set according to the characteristics of different requirements of the charging power of the rechargeable battery in different charging stages. The output voltage lock mode can avoid frequent jump of the output voltage of the power adapter during the entire charging cycle. The output voltage lock mode mainly works in the constant current region with a large charging current, which can make the rechargeable battery maintain a relatively large and stable charging current. In the output voltage lock mode, the selection of the most efficient efficiency can not only extend the service life of the rechargeable battery, but also improve the charging efficiency of the rechargeable battery, thereby shortening the charging time. The dynamic voltage regulation mode mainly works in the constant voltage region. As the charging current of the rechargeable battery in the constant voltage region continues to drop, the impact of the output voltage jump of the power adapter on the charging current can be ignored. In the dynamic voltage regulation mode, the power adapter The output voltage can be changed to meet the power requirements of the rechargeable battery, which can keep the rechargeable battery in the constant voltage charging stage, which can make the electronic device work at a lower energy consumption level, and reduce power loss.

Among them, since the charging control method implemented by the present invention can improve the charging efficiency and effectively control the temperature rise of components, the electronic device can support a larger charging current, thereby further improving the charging speed. In addition, the voltage change verification function provided by the embodiment of the present invention can make the electronic device automatically jump out of the abnormal working state, and can support user-defined operation after failure of the voltage change verification, thereby improving the safety and robustness during the charging process. Sex.

Please refer to FIG. 7, which is a schematic structural diagram of an electronic device according to an embodiment of the present invention. The electronic device described in the embodiment of the present invention is connected to a power adapter through a charging cable, and includes a processor 701, a rechargeable battery 702, and a charge management chip 703:

The processor 701 is configured to:

After the electronic device and the power adapter establish a physical connection, determine whether a charging current value of the rechargeable battery 702 is greater than a charging current limit value of a first preset multiple;

When the charging current value of the rechargeable battery 702 is greater than the charging current limit value of the first preset multiple, controlling the power adapter to enter an output voltage lock mode, wherein when the power adapter is in the output voltage lock mode When the rechargeable battery 702 of the electronic device is in a constant current charging state;

When the charging current value of the rechargeable battery 702 is less than or equal to the charging current limiting value of the first preset multiple, the power adapter is controlled to enter a dynamic voltage regulation mode, wherein when the power adapter is in the dynamic voltage regulation In the voltage mode, the rechargeable battery 702 of the electronic device is in a constant voltage charging state.

In an embodiment, after the processor 701 controls the power adapter to enter the output voltage lock mode, the processor 701 is further configured to:

Acquiring the current charging current value of the rechargeable battery 702 every predetermined time interval, and determining whether the current charging current value of the rechargeable battery 702 is greater than the charging current limit value of the first preset multiple;

When the current charging current value of the rechargeable battery 702 is less than or equal to the charging current limit value of the first preset multiple, obtaining the current output voltage value of the power adapter;

Determining whether the current output voltage value of the power adapter is greater than or equal to a preset output voltage threshold of the power adapter;

When the current output voltage value of the power adapter is less than a preset output voltage threshold of the power adapter, the power adapter is controlled to perform boost adjustment on the output voltage of the power adapter.

In an implementation manner, the processor 701 is further configured to:

When the current output voltage value of the power adapter is greater than or equal to a preset output voltage threshold of the power adapter, the power adapter is switched from the output voltage lock mode to the dynamic voltage regulation mode.

In an embodiment, before the processor 701 determines whether the charging current value of the rechargeable battery 702 is greater than a charging current limit value of a first preset multiple, the processor 701 is further configured to:

Acquire a charging voltage value of the rechargeable battery 702, and set a charging current limit value of the rechargeable battery 702 according to the charging voltage value of the rechargeable battery 702.

In an embodiment, after the processor 701 controls the power adapter to enter a dynamic voltage regulation mode, the processor 701 is further configured to:

Obtaining the current output voltage value of the power adapter, comparing the current output voltage value of the power adapter with a preset output voltage value of the power adapter, and determining that the current output voltage value is in Whether the difference between the set output voltage values is greater than a preset voltage difference;

When the difference between the current output voltage value and the preset output voltage value is greater than the preset voltage difference, controlling the power adapter to perform step-down adjustment on the output voltage of the power adapter; or

When the difference between the current output voltage value and the preset output voltage value is less than or equal to the preset voltage difference value, controlling the power adapter to boost the output voltage of the power adapter Adjustment.

In an embodiment, after the processor 701 controls the power adapter to enter the output voltage lock mode, the processor 701 is further configured to:

Controlling the power adapter to adjust the output voltage value of the power adapter so that the charging current value of the rechargeable battery 702 is at the charging current limit value of the first preset multiple and the charging current limit value of the second preset multiple Between, the second preset multiple is greater than the first preset multiple;

In the process of adjusting the output voltage value of the power adapter, calculate conversion efficiency values corresponding to different charging current values of the rechargeable battery 702, and determine the output voltage value of the power adapter corresponding to the maximum value of the conversion efficiency value. Is the target output voltage value;

Controlling the power adapter to adjust an output voltage value of the power adapter to the target output voltage value.

In specific implementation, the processor 701, the rechargeable battery 702, and the charge management chip 703 described in the embodiment of the present invention may implement the implementation manner of the electronic device described in a charging control method provided by the embodiment of the present invention. More details.

In the embodiment of the present invention, after the physical connection is established between the electronic device and the power adapter in the embodiment of the present invention, the processor 701 first determines whether the charging current value of the rechargeable battery 702 is greater than the charging current limit value of the first preset multiple. The power adapter is controlled to enter the output voltage lock mode. If not, the power adapter is controlled to enter the dynamic voltage regulation mode. Among them, the rechargeable battery 702 is in a constant current charging state in the output voltage locking mode, and the rechargeable battery 702 is in a constant voltage in the dynamic voltage regulation mode. Charging status, which can reduce power loss during charging and effectively improve charging efficiency.

The present invention also provides a computer-readable storage medium. The computer-readable storage medium stores instructions that, when run on a computer, cause the computer to execute the charging control method according to the foregoing method embodiment.

The invention also provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the charging control method described in the above method embodiment.

The present invention also provides a terminal, including a processor, an input device, an output device, a communication interface, and a memory, and the processor, the input device, the output device, the communication interface, and the memory are connected to each other, where The memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the charging control method according to the foregoing method embodiment.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all described as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence. Because according to the present invention, some steps may be performed in another order or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

The steps in the method of the embodiment of the present invention can be adjusted, combined, and deleted according to actual needs. The components in the electronic device according to the embodiment of the present invention may be combined, divided, and deleted according to actual needs.

A person of ordinary skill in the art may understand that all or part of the steps in the various methods of the foregoing embodiments may be implemented by a program instructing related hardware. The program may be stored in a computer-readable storage medium. The storage medium may include: Flash disk, Read-Only Memory (ROM), Random Access Memory (RAM), magnetic disk or optical disk, etc.

What has been disclosed above is only a preferred embodiment of the present invention, and of course, the scope of rights of the present invention cannot be limited by this. Those of ordinary skill in the art can understand all or part of the process of implementing the above embodiments and follow the rights of the present invention. Equivalent changes required are still within the scope of the invention.

Claims (13)

1. A charging control method is applied to an electronic device, the electronic device is connected to a power adapter through a charging cable, the electronic device includes a rechargeable battery, and the method includes:

   After establishing a physical connection with the power adapter, determining whether a charging current value of the rechargeable battery is greater than a charging current limit value of a first preset multiple;

   And controlling the power adapter to enter an output voltage lock mode when a charging current value of the rechargeable battery is greater than a charging current limit value of the first preset multiple, wherein when the power adapter is in the output voltage lock mode The rechargeable battery of the electronic device is in a constant current charging state;

   When the charging current value of the rechargeable battery is less than or equal to the charging current limit value of the first preset multiple, controlling the power adapter to enter a dynamic voltage regulation mode, wherein when the power adapter is in the dynamic voltage regulation In the mode, the rechargeable battery of the electronic device is in a constant voltage charging state.
2. The method according to claim 1, wherein after the controlling the power adapter to enter an output voltage lock mode, the method further comprises:

   Acquiring the current charging current value of the rechargeable battery at a preset time interval, and determining whether the current charging current value of the rechargeable battery is greater than the charging current limit value of the first preset multiple;

   When the current value of the charging current of the rechargeable battery is less than or equal to the charging current limit value of the first preset multiple, obtaining the current output voltage value of the power adapter;

   Determining whether the current output voltage value of the power adapter is greater than or equal to a preset output voltage threshold of the power adapter;

   When the current output voltage value of the power adapter is less than a preset output voltage threshold of the power adapter, the power adapter is controlled to perform boost adjustment on the output voltage of the power adapter.
3. The method according to claim 2, further comprising:

   When the current output voltage value of the power adapter is greater than or equal to a preset output voltage threshold of the power adapter, the power adapter is switched from the output voltage lock mode to the dynamic voltage regulation mode.
4. The method according to any one of claims 1 to 3, wherein before the determining whether a charging current value of the rechargeable battery is greater than a charging current limit value of a first preset multiple, the method further comprises:

   A charging voltage value of the rechargeable battery is obtained, and a charging current limit value of the rechargeable battery is set according to the charging voltage value of the rechargeable battery.
5. The method according to claim 1, wherein after the controlling the power adapter to enter a dynamic voltage regulation mode, the method further comprises:

   Obtaining the current output voltage value of the power adapter, comparing the current output voltage value of the power adapter with a preset output voltage value of the power adapter, and determining that the current output voltage value is in Whether the difference between the set output voltage values is greater than a preset voltage difference;

   When the difference between the current output voltage value and the preset output voltage value is greater than the preset voltage difference, controlling the power adapter to perform step-down adjustment on the output voltage of the power adapter; or

   When the difference between the current output voltage value and the preset output voltage value is less than or equal to the preset voltage difference value, controlling the power adapter to boost the output voltage of the power adapter Adjustment.
6. The method according to claim 1, wherein after the controlling the power adapter to enter an output voltage lock mode, the method further comprises:

   Controlling the power adapter to adjust the output voltage value of the power adapter so that the charging current value of the rechargeable battery is between the charging current limit value of the first preset multiple and the charging current limit value of the second preset multiple; The second preset multiple is greater than the first preset multiple;

   In the process of adjusting the output voltage value of the power adapter, the conversion efficiency values corresponding to different charging current values of the rechargeable battery are calculated, and the output voltage value of the power adapter corresponding to the maximum value of the conversion efficiency value is determined as Target output voltage value;

   Controlling the power adapter to adjust an output voltage value of the power adapter to the target output voltage value.
7. An electronic device, which is connected to a power adapter through a charging cable, is characterized in that the electronic device includes a processor and a rechargeable battery, and the processor is used for:

   After the electronic device and the power adapter establish a physical connection, determine whether a charging current value of the rechargeable battery is greater than a charging current limit value of a first preset multiple;

   And controlling the power adapter to enter an output voltage lock mode when a charging current value of the rechargeable battery is greater than a charging current limit value of the first preset multiple, wherein when the power adapter is in the output voltage lock mode The rechargeable battery of the electronic device is in a constant current charging state;

   When the charging current value of the rechargeable battery is less than or equal to the charging current limit value of the first preset multiple, controlling the power adapter to enter a dynamic voltage regulation mode, wherein when the power adapter is in the dynamic voltage regulation In the mode, the rechargeable battery of the electronic device is in a constant voltage charging state.
8. The electronic device according to claim 7, wherein after the processor controls the power adapter to enter an output voltage lock mode, the processor is further configured to:

   Acquiring the current charging current value of the rechargeable battery at a preset time interval, and determining whether the current charging current value of the rechargeable battery is greater than the charging current limit value of the first preset multiple;

   When the current value of the charging current of the rechargeable battery is less than or equal to the charging current limit value of the first preset multiple, obtaining the current output voltage value of the power adapter;

   Determining whether the current output voltage value of the power adapter is greater than or equal to a preset output voltage threshold of the power adapter;

   When the current output voltage value of the power adapter is less than a preset output voltage threshold of the power adapter, the power adapter is controlled to perform boost adjustment on the output voltage of the power adapter.
9. The electronic device according to claim 8, wherein the processor is further configured to:

   When the current output voltage value of the power adapter is greater than or equal to a preset output voltage threshold of the power adapter, the power adapter is switched from the output voltage lock mode to the dynamic voltage regulation mode.
10. The electronic device according to any one of claims 7 to 9, characterized in that, before the processor determines whether the charging current value of the rechargeable battery is greater than a charging current limit value of a first preset multiple, the processor Also used for:

    Acquiring a charging voltage value of the rechargeable battery, and setting a charging current limit value of the rechargeable battery according to the charging voltage value of the rechargeable battery.
11. The electronic device according to claim 7, wherein after the processor controls the power adapter to enter a dynamic voltage regulation mode, the processor is further configured to:

    Obtaining the current output voltage value of the power adapter, comparing the current output voltage value of the power adapter with a preset output voltage value of the power adapter, and determining that the current output voltage value is in Whether the difference between the set output voltage values is greater than a preset voltage difference;

    When the difference between the current output voltage value and the preset output voltage value is greater than the preset voltage difference, controlling the power adapter to perform step-down adjustment on the output voltage of the power adapter; or

    When the difference between the current output voltage value and the preset output voltage value is less than or equal to the preset voltage difference value, controlling the power adapter to boost the output voltage of the power adapter Adjustment.
12. The electronic device according to claim 7, wherein after the processor controls the power adapter to enter an output voltage lock mode, the processor is further configured to:

    Controlling the power adapter to adjust the output voltage value of the power adapter so that the charging current value of the rechargeable battery is between the charging current limit value of the first preset multiple and the charging current limit value of the second preset multiple; The second preset multiple is greater than the first preset multiple;

    In the process of adjusting the output voltage value of the power adapter, the conversion efficiency values corresponding to different charging current values of the rechargeable battery are calculated, and the output voltage value of the power adapter corresponding to the maximum value of the conversion efficiency value is determined as Target output voltage value;

    Controlling the power adapter to adjust an output voltage value of the power adapter to the target output voltage value.
13. A computer-readable storage medium is applied to an electronic device, the electronic device is connected to a power adapter through a charging cable, the electronic device includes a rechargeable battery, and the computer-readable storage medium stores instructions, When the instructions are run on a computer, the computer is caused to perform the following steps:

    After the electronic device and the power adapter establish a physical connection, determine whether a charging current value of the rechargeable battery is greater than a charging current limit value of a first preset multiple;

    And controlling the power adapter to enter an output voltage lock mode when a charging current value of the rechargeable battery is greater than a charging current limit value of the first preset multiple, wherein when the power adapter is in the output voltage lock mode The rechargeable battery of the electronic device is in a constant current charging state;

    When the charging current value of the rechargeable battery is less than or equal to the charging current limit value of the first preset multiple, controlling the power adapter to enter a dynamic voltage regulation mode, wherein when the power adapter is in the dynamic voltage regulation In the mode, the rechargeable battery of the electronic device is in a constant voltage charging state.

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