WO2016101509A1

WO2016101509A1 - Charging control method and device

Info

Publication number: WO2016101509A1
Application number: PCT/CN2015/079101
Authority: WO
Inventors: 施济杰; 张建华
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-12-26
Filing date: 2015-05-15
Publication date: 2016-06-30
Also published as: CN105790345A

Abstract

A charging control method and device, the method comprising: detecting a charging current value and a charging voltage value of an adapter inputted to a charging circuit (S11); conducting a current limiting adjustment to the charging current according to the charging current value and the charging voltage value until the adapter charges a to-be-charged device of the charging circuit at a target charging current, the target charging current being a maximum charging current provided by the adapter (S12).

Description

Charging control method and device

Technical field

This document relates to the field of communication technologies, and in particular, to a charging control method and apparatus.

Background technique

With the continuous development of communication technology and network technology, the demand of users is increasing, and the functions of terminal devices are more and more integrated, and the power consumption of the whole machine is becoming more and more prominent. Therefore, higher requirements are placed on the power capacity and charging performance of the power supply.

At present, although most terminals can be connected to the adapter through the USB interface for charging, the adapter also needs to provide matching output current and output voltage to make the charging process most effective. However, in specific applications, users often forget to carry the standard charger of the terminal and use the other adapters of the USB interface to charge when the terminal is low. Since the charging parameters of the adapter do not match the charging parameters of the terminal, a series of problems such as slow charging and low performance may be caused, which greatly reduces the charging performance of the terminal.

Summary of the invention

The embodiment of the invention provides a charging control method and device, which are used to solve the problem that the terminal charging performance is low due to the mismatch between the adapter and the terminal in the related art.

In one aspect, an embodiment of the present invention provides a charging control method, including: detecting a charging current value and a charging voltage value input by an adapter to a charging circuit; and limiting a charging current according to the charging current value and the charging voltage value. Adjusting until the adapter charges the charged device through the charging circuit with the target charging current; wherein the target charging current is the maximum charging current provided by the adapter.

Optionally, the current limiting is performed according to the charging current value and the charging voltage value until the adapter charges the charged device of the charging circuit with the target charging current: Adjusting a current limit value of the charging circuit by adjusting a charging current value and the charging voltage value; limiting current adjustment of the charging current by adjusting the current limiting value The adapter is charged with the target charging current for the charged device of the charging circuit.

Optionally, the adjusting the current limit value of the charging circuit according to the charging current value and the charging voltage value comprises: increasing the current limiting value by a first step length; if the charging current is equal to increasing The current limit value after the large, and the charging voltage is greater than or equal to the preset voltage threshold, and continues to increase the current limit value by the first step length; and by adjusting the current limit value, The charging current is subjected to current limiting adjustment until the adapter charges the charged device of the charging circuit with the target charging current: the current limiting value is adjusted, and the charging current is current-limited until the The charging current does not increase as the current limit value increases, or until the charging voltage is lower than the preset voltage threshold.

Optionally, the continuing to increase the current limit value by the first step length until the charging current does not increase with the increase of the current limit value, or until the charging voltage is lower than the After the preset voltage threshold, the method further includes: reducing the current limit value by the first step length; increasing the reduced current limit value by a second step, wherein The second step length is smaller than the first step length; if the charging current is equal to the current limit value after the second step length is increased, and the charging voltage is greater than or equal to the preset voltage threshold And continuing to increase the current limit value by the second step.

Optionally, after performing current limiting adjustment on the charging current according to the charging current value and the charging voltage value, the method further includes: terminating if the remaining power of the charged device meets a preset condition Charging.

Optionally, terminating the charging if the remaining power of the charged device meets the preset condition includes:

Detecting a remaining charge of the charged device when the charging current is less than the target charging current; determining a charge cutoff current value according to the remaining power and the charging current; when the charging current is less than the charging cutoff current At the time of the value, the charging of the charged device is terminated.

In another aspect, the embodiment of the present invention further provides a charging control apparatus, including: a detecting unit configured to detect a charging current value and a charging voltage value input by the adapter to the charging circuit; and a current limiting adjusting unit configured to be configured according to the Charging current value and the charging voltage value, current limiting adjustment of the charging current until the adapter charges the charging device through the charging circuit with the target charging current; wherein the target charging current is provided for the adapter Maximum charging current.

Optionally, the current limiting adjustment unit includes: a limit value adjustment module configured to adjust a current limit value of the charging circuit according to the charging current value and the charging voltage value; and a current adjustment module, configured to The current limit is adjusted by adjusting the current limit value.

Optionally, the limit value adjustment module is configured to: increase the current limit value by a first step length; if the charging current is equal to the increased current limit value, and the charging voltage is greater than or Equal to the preset voltage threshold, continue to increase the current limit value by the first step length; the current adjustment module is configured to: perform current limiting adjustment on the charging current by adjusting the current limit value until The charging current does not increase as the current limit value increases, or until the charging voltage is lower than the preset voltage threshold.

Optionally, the limit value adjustment module is further configured to: continue to increase the current limit value by the first step length until the charging current does not increase with the increase of the current limit value, or After the charging voltage is lower than the preset voltage threshold, the current limiting value is decreased by the first step length; the reduced current limiting value is increased by a second step, Wherein the second step length is smaller than the first step length; if the charging current is equal to the current limit value increased by the second step size, and the charging voltage is greater than or equal to the pre- The voltage threshold is set to continue to increase the current limit value by the second step.

Optionally, the device further includes a termination unit configured to terminate charging if the remaining power of the charged device meets a preset condition.

Optionally, the terminating unit is configured to: when the charging current is less than the target charging current, detecting a remaining power of the charged device; determining a charging cutoff current value according to the remaining power and the charging current When the charging current is less than the charging off current value, charging the charged device is terminated.

The embodiment of the invention further provides a computer readable storage medium storing program instructions, which can be implemented when the program instructions are executed.

The charging control method and device provided by the embodiment of the invention can detect the charging current value and the charging voltage value input by the adapter to the charging circuit, and perform current limiting adjustment on the charging current according to the charging current value and the charging voltage value. Until the adapter is able to charge the charged device with the target charging current. In this way, when the terminal faces different types of power adapters, the terminal can be adjusted to match the optimal charging state of the adapter by limiting the charging current. State, so as to fully utilize the charging performance of a variety of adapters.

BRIEF abstract

1 is a flow chart of a charging control method according to an embodiment of the present invention;

2 is a schematic structural diagram of a charging management chip in a terminal for implementing a charging control method according to an embodiment of the present invention;

3 is a schematic diagram of signal flow in a constant current phase charging management according to an embodiment of the present invention;

4 is a schematic diagram of signal flow of a constant voltage stage charging management in an embodiment of the present invention;

FIG. 5 is a detailed flowchart of a charging control method in an embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a charging control apparatus according to an embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1 , an embodiment of the present invention provides a charging control method, including:

S11, detecting a charging current value and a charging voltage value of the adapter input to the charging circuit;

S12, performing current limiting adjustment on the charging current according to the charging current value and the charging voltage value until the adapter charges the charging device through the charging circuit with the target charging current; wherein the target charging current The maximum charging current provided for the adapter.

The charging control method provided by the embodiment of the invention can detect the charging current value and the charging voltage value input by the adapter to the charging circuit, and perform current limiting adjustment on the charging current according to the charging current value and the charging voltage value until the The adapter can charge the charged device with the target charging current. In this way, when the terminal faces different types of power adapters, by limiting the charging current, the terminal can be adjusted to match the optimal charging state of the adapter, thereby fully utilizing the charging performance of the plurality of adapters.

It should be noted that in the process of charging the terminal through the adapter, the adapter is equivalent to a power source, and the charging circuit in the terminal is equivalent to the load, and the ideal charging effect can be achieved when the load matches the power source.

When the charging socket of the terminal (such as the USB port) has just been inserted into a charging adapter, because the terminal does not match the adapter, the terminal does not know how much charging current and charging voltage the adapter can provide for its own charging load. Then, in order to find the maximum charging current that the adapter can provide, and the charging voltage can also meet the charging requirement, optionally, the charging current and the charging voltage input into the charging circuit of the terminal by the adapter in real time can be detected in step S11, and In step S12, the charging current is current-limited according to the charging current value and the charging voltage value until the adapter charges the charged device of the charging circuit with the target charging current.

In the above method, step S12 may include:

Adjusting the current limit value of the charging circuit according to the charging current value and the charging voltage value;

The current limit is adjusted by adjusting the current limit value until the adapter charges the charged device of the charging circuit with the target charging current.

That is to say, a current limit value can be set in the terminal, and the impedance of the charging circuit in the terminal can be adjusted according to the current limit value so that the charging current is equal to the current limit value, thereby realizing the limitation of the charging current. When the current limit value is changed, the charging current in the charging circuit is also changed accordingly, thereby realizing the adjustment of the charging current. Optionally, in order not to miss the most suitable charging current, the default initial current limit value can be set to a smaller amount (such as 50-100 microamperes) when the terminal is connected to the charging adapter, and then gradually stepped in a certain step. Increase the current limit value. The size of the step directly affects the speed and accuracy of the current adjustment. The larger the step size, the faster the speed but the lower the accuracy, the smaller the step size, the slower the speed but the higher the accuracy.

Optionally, in an embodiment of the present invention, adjusting the current limit value of the charging circuit according to the charging current value and the charging voltage value includes:

Increasing the current limit value by a first step length;

If the charging current is equal to the increased current limit value, and the charging voltage is greater than or equal to a preset voltage threshold, continue to increase the current limit value by the first step length;

The limiting current adjustment is performed by adjusting the current limit value until the adapter charges the charged device of the charging circuit with the target charging current:

Restricting the charging current by adjusting the current limit value until the charging current does not increase with the increase of the current limit value, or until the charging voltage is lower than The preset voltage threshold is up to now.

In this embodiment, when the charging current is equal to the increased current limiting value, and the charging voltage is greater than or equal to the preset voltage threshold, it indicates that the charging voltage and the charging current provided by the adapter are not reduced due to the change of the load, and there is still excess. The ability to carry a larger load, therefore, the adapter can be allowed to charge the terminal's charged device with a larger charging current by increasing the current limit value. As the charging current increases, the load of the adapter also gradually increases. When the load reaches the maximum load capacity of the adapter but the current limit value is still increasing, the charging current cannot be increased or charged for different types of adapters. The voltage cannot maintain the previous voltage value, and the charging voltage drops.

In the case that the charging current cannot be increased, it indicates that the charging current at this time is already the maximum charging current that the adapter can provide, and the charging current can be used as the target charging current to charge the terminal. In the case of a drop in the charging voltage, since the voltage is lowered below the voltage required for normal charging, the terminal cannot be normally charged. Therefore, the voltage required for normal charging becomes a voltage critical point, and the charging current corresponding to the critical point is the target current. Optionally, the voltage threshold may be set to a preset voltage threshold, so as to find a target charging current in the adjustment of the charging current, the target charging current can fully utilize the charging capability of the adapter, and effectively improve the charging efficiency of the terminal.

In the above embodiment, the first step current limit value is adjusted, but the embodiment of the present invention is not limited thereto. In order to speed up the search for the speed and efficiency of the target charging current, in other embodiments of the invention, continue to increase the current limit value by the first step length until the charging current does not increase with the increase of the current limit value, or After the charging voltage is lower than the preset voltage threshold, the following steps may be further included:

Reduce the current limit value by the first step;

The reduced current limit value is increased by the second step, wherein the second step length is less than the first step length;

If the charging current is equal to the current limiting value after the second step is increased, and the charging voltage is greater than or equal to the preset voltage threshold, continue to increase the current limiting value in the second step until the charging current does not increase with the current limiting value. And increase until the charging voltage value is lower than the preset voltage threshold.

Thus, since the first step is longer than the second step, when the charging current is increased in the first step, the target charging current is quickly positioned, and then the target charging current is accurately found in the second step. In this embodiment, the first step length is first subtracted, and then the second step length is gradually increased. However, the embodiment of the present invention is not limited thereto. In other embodiments of the present invention, the first step length may also be retained. And gradually reduce the second step based on the current limit value. Wherein, the values of the first step length and the second step length may have a large difference, such as the first step length being 5 times or 10 times of the second step length, and the like.

After the target charging current is determined, the target charging current can be charged by the charging device of the terminal, that is, the constant current charging phase of the charging process. As the electric energy is injected, the voltage and impedance of the charged device as the load also change. After reaching a certain level, the charging current will be continuously reduced, corresponding to the constant voltage charging phase of the charging process.

In the above method, after step S12, the method further includes: terminating charging if the remaining power of the charged device meets a preset condition. In this way, the charging termination operation is also performed according to the remaining power of the charged device, which ensures that the charged device of the terminal can be effectively filled, and the charging performance of the terminal is improved. For example, in the constant voltage phase described above, the off current control value may be dynamically adjusted according to the detected charging current and the current amount of power detected according to the battery aging curve, and the charging is stopped when the amount of electricity is 100%, and the entire charging process is completed.

Terminating the charging if the remaining power of the charged device meets the preset condition may include:

Detecting a remaining amount of power of the charged device when the charging current is less than the target charging current;

Determining a charge cutoff current value according to the remaining power amount and the charging current;

When the charging current is less than the charging cutoff current value, charging of the charged device is terminated.

In this way, the charging can be prevented from being stopped in advance due to the excessive off current value, resulting in the battery not being fully charged, or the off current value being too small, resulting in overshoot of the battery, which greatly improves the charging performance.

The charging control method provided by the above embodiment will be described in detail below by way of embodiments.

In an embodiment of the present invention, the structure of the charge management chip in the terminal implementing the charge control method can be as shown in FIG. 2.

Since the terminal has to adapt to connect multiple types of adapters, and the output currents of different types of adapters may be different, in order to fully utilize the output current capability of the adapter for an adapter that outputs a large current, The selection of the terminal charging management chip is crucial. In order to try to cover more types of adapters, you can choose a charging management chip that is resistant to high voltage inputs, especially high current inputs.

The charging control part mainly includes an input current detecting unit, an input voltage detecting unit, a current limiting unit, an off current limiting unit, and a power detecting unit. The current limiting unit and the off current limiting unit can be implemented by using a digital potentiometer or the like.

In the constant current charging phase, the current limiting unit first increments by a large number of steps, and determines whether the input voltage is lower than the threshold. If it is not lower than the threshold, check whether the input current detection result changes correspondingly, and obtain the maximum output current of the adapter. Then, the current limiting unit applies a small increment to obtain a more accurate current limit value, and finally obtains the optimal charging operating point. In the constant voltage charging phase, the off-current limiting unit is dynamically adjusted by real-time detection of the battery power, avoiding the unreasonable off-current limit value and stopping the charging in advance, causing the battery to be unable to be fully charged, or the off-current value being too small to cause the battery to overshoot.

Figure 3 is a schematic diagram of charge management in the constant current phase. As shown in FIG. 3, under the cooperative operation of the main control chip, the input current detection, the input voltage detection, and the current limiting unit, the optimal operating point of the constant current charging can be obtained.

Figure 4 is a schematic diagram of charge management in a constant voltage phase. As shown in FIG. 4, the power detecting unit can detect the battery power in real time according to the battery aging curve, and transmit the data of the battery power to the main control chip, and the main control chip adjusts the cutoff current limit value according to the state of the power state until the battery is full.

FIG. 5 is a detailed flowchart of a charging control method according to an embodiment of the present invention. Referring to FIG. 2 to FIG. 5, a flowchart of an implementation of an embodiment of the present invention is described in detail.

As shown in FIG. 5, the charging control method provided in this embodiment includes the following steps:

S301: The terminal system is powered on, and executing S302;

S302: the power supply of the other part of the circuit is normally supplied, but the enabling of the charging circuit is turned off, so that it is temporarily not working, and S303 is executed;

S303: The terminal system determines whether there is an interrupt signal inserted by the adapter, and if an adapter is inserted, executing S304;

S304: The main control chip enables the charging circuit, and starts charging the battery through the default value of the current limit set by the system, and executes S305;

S305: detecting the input charging current, notifying the main control chip, and executing S306;

S306: The main control chip determines whether the trickle charge is completed according to the result of the input charging current; if not, executes S305 to continue trickle charging; if trickle charging is completed, execute S307;

S307: entering the constant current charging phase, the current limiting control unit increases the limiting current step by step in a large number of steps, and executes S308;

S308: detecting whether the input voltage is lower than the threshold value, if the threshold value is lower than the maximum output current in the normal output voltage range of the adapter, then executing S310; if not lower than the threshold value, executing S309;

S309: The main control chip compares the input charging current before and after the current limiting value is added. If the current increases correspondingly, execute S307 to continue to increase the current limiting value; if the current does not change, the maximum output current of the adapter is already performed, and S310 is executed. ;

S310: the current limiting unit returns a large-scale current level, in preparation for obtaining a more accurate current-limit value, executing S311;

S311: the current limiting control unit increases the limiting current step by step in a small range, and executes S312;

S312: detecting whether the input voltage is lower than a threshold. If the threshold is lower than the threshold, it is already the maximum output current in the normal output voltage range of the adapter. The current limit value is a more accurate maximum current limit value, and then executed. S314; if not lower than the threshold, then S313 is performed;

S313: The main control chip compares the input charging current before and after the current limiting value is incremented. If the current increases correspondingly, execute S311 to continue to increase the current limiting value; if the current does not change, it is already the maximum output current of the adapter. The current limit value is a more accurate maximum current limit value, followed by S314;

S314: Set an optimal current limit value according to the maximum current limit value obtained in S313, so that the system works at the optimal working point, and execute S315;

S315: The main control chip detects the input charging current, and according to the current result, immediately executes S316;

S316: The main control chip according to the detection result, if the current does not change, then execute S315 to continue constant current charging; if the current decreases, it has been switched from constant current charging to constant voltage charging, and executing S317;

S317: the main control chip detects the input charging current, and according to the current result, immediately executes S318;

S318: as the input charging current continues to decrease, according to the battery power detection result, dynamically adjust the off current value to more accurately control the charging process, executing S319;

S319: The power detection monitors the battery power status in real time, if the battery is not full, execute S317; if the battery is full, execute S320;

S320: Stop charging and complete the entire charging process.

Through the above method embodiment, the terminal can connect adapters with different output currents, and provides an efficient, full capacity, full process charging management solution. In the whole operation process, the current output capability of various adapters is fully utilized; the battery detection unit avoids the problem that the battery may be flushed or overshooted, improves the battery capacity utilization, prolongs the endurance capability, and improves the user experience; The power detection unit dynamically adjusts the battery power according to the battery aging curve to make the battery power detection more accurate.

As shown in FIG. 6, an embodiment of the present invention further provides a charging control apparatus, including:

The detecting unit 40 is configured to detect a charging current value and a charging voltage value input by the adapter to the charging circuit;

The current limiting adjustment unit 42 is configured to perform current limiting adjustment on the charging current according to the charging current value and the charging voltage value until the adapter charges the charging device through the charging circuit with the target charging current; The target charging current is the maximum charging current provided by the adapter.

According to the charging control device provided by the embodiment of the present invention, the detecting unit 40 can detect the charging current value and the charging voltage value input by the adapter to the charging circuit, and the current limiting adjusting unit 42 can charge the charging current value and the charging voltage value. The current is current limited until the adapter is able to charge the charged device with the target charging current. In this way, when the terminal faces different types of power adapters, by limiting the charging current, the terminal can be adjusted to match the optimal charging state of the adapter, thereby fully utilizing the charging performance of the plurality of adapters.

Optionally, the current limiting adjustment unit 42 includes:

a limit value adjustment module configured to adjust a current limit value of the charging circuit according to the charging current value and the charging voltage value;

The current adjustment module is configured to perform current limiting adjustment on the charging current by adjusting the current limit value.

Optionally, the limit value adjustment module is set to:

Increasing the current limit value by a first step length;

The current adjustment module is configured to: after adjusting the current limit value, perform current limiting adjustment on the charging current until the charging current does not increase with an increase of the current limit value, or until the The charging voltage is lower than the preset voltage threshold.

Optionally, the limit value adjustment module is further configured to: continue to increase the current limit value by the first step length until the charging current does not increase with the increase of the current limit value, or Until the charging voltage is lower than the preset voltage threshold:

Reducing the current limit value by the first step length;

The reduced current limit value is increased by a second step, wherein the second step size is smaller than the first step length;

If the charging current is equal to the current limit value increased by the second step size, and the charging voltage is greater than or equal to the preset voltage threshold, continue to increase the second step size Current limit value.

Optionally, the apparatus may further include a termination unit configured to terminate charging if the remaining power of the charged device satisfies a preset condition. In this way, the charging termination operation of the termination unit is also performed according to the remaining power of the charged device, which ensures that the charged device of the terminal can be effectively filled, and the charging performance of the terminal is improved.

Optionally, the termination unit may be configured to: when the charging current is less than the target charging current, detect a remaining power of the charged device; determine a charging cutoff current value according to the remaining power and the charging current; When the charging current is less than the charging off current value, charging the charged device is terminated.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program that instructs the phase optics hardware to be stored in a computer readable storage medium such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any What is the combination of specific forms of hardware and software.

Industrial applicability

The charging control method and device provided by the embodiment of the invention can detect the charging current value and the charging voltage value input by the adapter to the charging circuit, and perform current limiting adjustment on the charging current according to the charging current value and the charging voltage value. Until the adapter is able to charge the charged device with the target charging current. In this way, when the terminal faces different types of power adapters, by limiting the charging current, the terminal can be adjusted to match the optimal charging state of the adapter, thereby fully utilizing the charging performance of the plurality of adapters.

Claims

A charging control method comprising:

Detecting a charging current value and a charging voltage value of the adapter input to the charging circuit;

And limiting current to the charging current according to the charging current value and the charging voltage value until the adapter charges the charging device through the charging circuit with the target charging current; wherein the target charging current is The maximum charging current provided by the adapter.
The method according to claim 1, wherein said charging current is current-limited according to said charging current value and said charging voltage value until said adapter is charged with said target charging current as said charging circuit The device is charged as follows:

Adjusting a current limit value of the charging circuit according to the charging current value and the charging voltage value;

The charging current is current limited by adjusting the current limit value until the adapter charges the charged device of the charging circuit with the target charging current.
The method of claim 2, wherein the adjusting the current limit value of the charging circuit according to the charging current value and the charging voltage value comprises:

Increasing the current limit value by a first step length;

If the charging current is equal to the increased current limit value, and the charging voltage is greater than or equal to a preset voltage threshold, continue to increase the current limit value by the first step length;

The limiting current adjustment is performed by adjusting the current limit value until the adapter charges the charged device of the charging circuit with the target charging current:

Restricting the charging current by adjusting the current limit value until the charging current does not increase with the increase of the current limit value, or until the charging voltage is lower than the preset voltage The threshold is up.
The method of claim 3, said continuing to increase said current limit value by said first step length until said charge current does not increase with said current limit value, or until said charging After the voltage is lower than the preset voltage threshold, the method further includes:

Reducing the current limit value by the first step length;

The reduced current limit value is increased by a second step, wherein the second step size is smaller than the first step length;

If the charging current is equal to the current limit value increased by the second step size, and the charging voltage is greater than or equal to the preset voltage threshold, continue to increase the second step size Current limit value.
The method according to any one of claims 1 to 4, after the current limiting is performed on the charging current according to the charging current value and the charging voltage value, the method further includes:

The charging is terminated in a case where the remaining amount of the charged device satisfies a preset condition.
The method according to claim 5, wherein terminating charging if the remaining amount of power of the charged device satisfies a preset condition comprises:

Detecting a remaining amount of power of the charged device when the charging current is less than the target charging current;

Determining a charge cutoff current value according to the remaining power amount and the charging current;

When the charging current is less than the charging cutoff current value, charging of the charged device is terminated.
A charging control device comprising:

a detecting unit configured to detect a charging current value and a charging voltage value of the adapter input to the charging circuit;

The current limiting adjustment unit is configured to perform current limiting adjustment on the charging current according to the charging current value and the charging voltage value until the adapter charges the charging device through the charging circuit with the target charging current; wherein The target charging current is the maximum charging current provided by the adapter.
The apparatus according to claim 7, wherein the current limiting adjustment unit comprises:

a limit value adjustment module configured to adjust a current limit value of the charging circuit according to the charging current value and the charging voltage value;

The current adjustment module is configured to perform current limiting adjustment on the charging current by adjusting the current limiting value such that the adjusted charging current is equal to the target charging current.
The device of claim 8

The limit value adjustment module is configured to: increase the current limit value by a first step length; if the charge current is equal to the increased current limit value, and the charge voltage is greater than or equal to a preset voltage a threshold, continuing to increase the current limit value by the first step length;

The current adjustment module is configured to: after adjusting the current limit value, perform current limiting adjustment on the charging current until the charging current does not increase with an increase of the current limit value, or until the The charging voltage is lower than the preset voltage threshold.
The apparatus according to claim 9, wherein the limit value adjustment module is further configured to: continue to increase the current limit value by the first step length until the charging current does not increase with the current limit value And increase, or until the charging voltage is lower than the preset voltage threshold:

Reducing the current limit value by the first step length;

The reduced current limit value is increased by a second step, wherein the second step size is smaller than the first step length;

If the charging current is equal to the current limit value increased by the second step size, and the charging voltage is greater than or equal to the preset voltage threshold, continue to increase the second step size Current limit value.
The apparatus according to any one of claims 7 to 10, further comprising a termination unit configured to terminate charging if a remaining amount of power of the charged device satisfies a preset condition.
The apparatus of claim 11 wherein said termination unit is configured to:

Detecting a remaining amount of power of the charged device when the charging current is less than the target charging current;

Determining a charge cutoff current value according to the remaining power amount and the charging current;

When the charging current is less than the charging cutoff current value, charging of the charged device is terminated.
A computer readable storage medium storing program instructions that, when executed, can implement the method of any of claims 1-6.