WO2023125252A1

WO2023125252A1 - Charging control methods, electronic device and computer readable storage medium

Info

Publication number: WO2023125252A1
Application number: PCT/CN2022/141192
Authority: WO
Inventors: 贾宝锋
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-12-29
Filing date: 2022-12-22
Publication date: 2023-07-06
Also published as: CN116418056A

Abstract

Provided in the embodiments of the present application are charging control methods, an electronic device and a computer readable storage medium. A charging control method comprises: determining a current overall charging efficiency; and when the current overall charging efficiency is lower than a preset threshold value, adjusting the output voltage of an adjustable charging device according to the reference charging current of the adjustable charging device and real-time charging parameters of a mobile terminal.

Description

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

Cross References to Related Applications

This application is based on the Chinese patent application CN202111638322.5 filed on December 29, 2021 with the title of "charging control method, electronic device and computer-readable storage medium", and claims the priority of this patent application, which is incorporated by reference The disclosed content is incorporated in this application in its entirety.

technical field

The embodiments of the present application relate to the communication field, and in particular, to a charging control method, an electronic device, and a computer-readable storage medium.

Background technique

With the development of fast charging technology for mobile terminals, users have higher and higher requirements for charging speed. To speed up charging, it is necessary to increase the charging current, or improve the physical characteristics, capacity or materials of the battery itself. When the charging current is increased, it will cause the mobile terminal system to generate heat during charging, so we cannot blindly pursue high current. For the charging chip, the charging process must first increase the voltage, and finally when charging the battery side, the voltage must be lowered. , In this process, excessive voltage will cause energy loss in mobile terminal systems, charging chips, charging equipment, etc. The greater the loss, the greater the heat generation. Therefore, reducing energy loss and improving charging efficiency has become a difficult problem in this field.

Contents of the invention

Embodiments of the present application provide a charging control method, an electronic device, and a computer-readable storage medium.

In the first aspect, the embodiment of the present application provides a charging control method, including: determining the current overall charging efficiency; when the current overall charging efficiency is lower than a predetermined threshold, according to the reference charging current of the adjustable charging device, and The real-time charging parameters are used to adjust the output voltage of the adjustable charging device, so as to improve the overall charging efficiency of the mobile terminal.

In a second aspect, an embodiment of the present application provides a charging control method, including: acquiring charging logs of various mobile terminals, the charging logs being logs generated by the mobile terminal executing any one of the methods described in the first aspect ; According to the charging log, determine the charging strategy corresponding to the model of various mobile terminals, wherein the charging strategy includes the difference between the output voltage of the adjustable charging device and the real-time charging parameter and the reference charging current of the adjustable charging device Relationship.

In the third aspect, the embodiment of the present application provides a charging control method, including: according to the model of the mobile terminal, using the charging strategy obtained from the server as an alternative charging strategy, wherein the charging strategy is based on the second The charging strategy determined by the server in the charging control method described in any one of the aspects; the charging strategy used for charging is selected from at least one of the alternative charging strategies; during the charging process, according to the charging strategy used for charging The charging strategy regulates the output voltage of the adjustable charging device.

In a fourth aspect, the embodiment of the present application provides an electronic device, including: one or more processors; a memory, on which one or more programs are stored, when the one or more programs are executed by the one or more one or more processors, so that the one or more processors implement the charging control method according to any one of the first aspect to the third aspect; one or more I/O interfaces are connected between the processor and the third aspect; The memory is configured to realize information interaction between the processor and the memory.

In the fifth aspect, the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the computer program according to the first aspect to the third aspect is implemented. Any one of the charging control methods.

Description of drawings

Fig. 1 is a flowchart of a charging control method provided by an embodiment of the present application.

Fig. 2 is a flow chart of another charging control method provided by an embodiment of the present application.

Fig. 3 is a flowchart of some steps in a charging control method provided by an embodiment of the present application.

Fig. 4 is a flowchart of some steps in a charging control method provided by an embodiment of the present application.

Fig. 5 is a flow chart of yet another charging control method provided by an embodiment of the present application.

Fig. 6 is a flow chart of yet another charging control method provided by an embodiment of the present application.

Fig. 7 is a schematic diagram of the hardware framework of the dual charging chip system provided by the embodiment of the present application.

Fig. 8 is a schematic diagram of an output voltage regulation software framework of an adjustable charging device provided by an embodiment of the present application.

FIG. 9 is a schematic diagram of a charging control flow provided by an embodiment of the present application.

Fig. 10 is a schematic diagram of a flow chart for calculating the battery internal resistance provided by the embodiment of the present application.

FIG. 11 is a schematic diagram of a calculation flow of cable internal resistance provided by an embodiment of the present application.

FIG. 12 is a schematic diagram of a charging voltage adjustment process provided by an embodiment of the present application.

Fig. 13 is a schematic diagram of an electronic device provided by an embodiment of the present application.

Fig. 14 is a schematic diagram of a computer-readable storage medium provided by an embodiment of the present application.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

In the subsequent description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating the description of the present application and has no specific meaning by itself. Therefore, 'module', 'part' or 'unit' may be used in combination.

Generally, the battery temperature is first divided into three temperature ranges. When the battery temperature is between 10 degrees and 45 degrees, it is marked as normal (normal), and it is charged with the maximum current limited by the charger. When the battery temperature is between 0 degrees and 10 degrees, it is marked as normal. If it is cool, use a smaller current for charging. When the battery is between 45 degrees and 50 degrees (or 55 degrees), it is marked as warm and use a smaller current for charging. When the battery is cool or warm, the charging current must meet the specifications of the battery.

If the mobile phone detects that it is a fast charging charger that can boost the voltage, then the boost charging will be performed, otherwise it will be charged in the ordinary 5V normal mode, and the high voltage charging will always be maintained during the charging process. After the battery is fully charged or charged After reaching a constant voltage, it is lowered to 5V for charging, or when the battery temperature is warm or cool, it will perform step-down processing. This existing charging method has the following disadvantages: 1) When the battery temperature is in the normal state, the charger is always in the mode of outputting high voltage for charging during the constant current charging stage. 2) In this kind of charging that is always in the high-voltage mode, when the mobile phone is hot, the usual method is to limit the current of the mobile phone, which can quickly reduce the heating of the battery, and the temperature of the system will decrease. But if you limit the current going into the battery, this will also prolong the charging time of the phone. If the input current is limited, the total current will be reduced, which will not only affect the power supply of the system by the charger, but also affect the current for charging the battery, and will also delay the charging time of the mobile phone. Current limiting in both cases will allow the system to balance heat generation and charging time. 3) During the charging process, the output voltage of the charger remains constant. From the perspective of charging efficiency, the high voltage that enters the charging chip is greater than 5V. When charging the battery, the voltage must be reduced. During this conversion process, energy loss will occur, making the charging chip The optimal charging efficiency cannot be exerted.

In the charging process of the related technology, if the mobile terminal supports fast charging for charging, it will boost the charging, keep the high voltage charging during the charging process, and reduce it to 5V charging after the battery is fully charged or charged to a constant voltage. The charging efficiency Ceff=(Vbat*Ibat)/(Vbus*Ibus) of the charging chip, wherein, Ceff is the charging efficiency, Vbat is the battery voltage, Ibat is the battery current, Vbus is the current input to the charging chip, and Ibus is the current input to the charging chip. current. When the current Ibus is fixed, if the Vbus increases, the efficiency of the charging chip will be reduced. Therefore, charging at a high voltage (such as 9V) during the constant current charging process is not charging with the best efficiency. After the system heats up, in the case of current limiting, there is actually no need to maintain a high voltage, and a certain voltage can be lowered to balance the heat generation and efficiency of charging. Adjusting the voltage to an appropriate voltage value for charging while maintaining high charging efficiency can reduce energy loss in mobile terminal systems, charging chips, charging equipment, etc. caused by high-voltage charging, thereby reducing heat generation during charging . That is, without prolonging the charging time, it can also reduce the charging heat, which generally improves the user experience.

Therefore, aiming at the defects and deficiencies of the existing charging methods, the embodiment of the present application proposes a solution. For an adjustable charging device that can adjust the output voltage, the output voltage of the adjustable charging device is adjusted to achieve the maximum performance of the adjustable charging device. The reference charging current takes into account the charging efficiency, realizes the balance between charging and heat generation, and exerts the optimal charging efficiency of the charging chip.

In the first aspect, the embodiment of the present application provides a charging control method, as shown in FIG. 1 , the method includes the following steps:

In step S100, determine the current overall charging efficiency;

In step S200, when the current overall charging efficiency is lower than a predetermined threshold, the output voltage of the adjustable charging device is adjusted according to the reference charging current of the adjustable charging device and the real-time charging parameters of the mobile terminal, so as to increase the Describe the overall charging efficiency of the mobile terminal.

The idea of the embodiment of the present application is to ensure the constant current charging with the reference charging current by adjusting the voltage of the adjustable charging device, and at the same time ensure the charging efficiency, so as to achieve the dual effects of both charging speed and charging efficiency. Therefore, it should be pointed out that the charging device used in the embodiment of the present application is a charging device with adjustable voltage. When the charging device is initially connected, the mobile terminal will detect the charging device. If the voltage is not adjustable, it will be charged in a normal way, which is out of the scope of this article; if the voltage is adjustable, it will be charged according to the charging control method of the embodiment of the application. , to adjust the voltage of the adjustable charging device.

After each adjustment, the overall charging efficiency is recalculated according to the charging parameters measured in real time, so as to determine whether the overall charging efficiency reaches a predetermined threshold. If the overall charging efficiency is lower than the predetermined threshold, it is necessary to calculate the current target output voltage according to the reference charging current of the adjustable charging device and the real-time charging parameters of the mobile terminal, and adjust the current output voltage of the adjustable charging device, After the mediation, the overall charging efficiency is calculated again, and after repeated calculation and adjustment, until the current overall charging efficiency can reach the predetermined threshold and the output current of the adjustable charging device can be stabilized at the reference charging current.

In some embodiments, before the determination of the current overall charging efficiency, as shown in FIG. 2 , the charging control method further includes:

In step S310, determine the target output voltage of the adjustable charging device according to the reference charging current of the adjustable charging device and the real-time charging parameters of the mobile terminal;

In step S320, if the current output voltage of the adjustable charging device does not meet the target output voltage, adjust the current output voltage to the target output voltage.

When the charging device is an adjustable charging device, firstly, the required output voltage of the adjustable charging device is reversely calculated according to the reference charging current of the adjustable charging device. At this time, according to the charging parameters measured in real time, such as cable internal resistance, input voltage of the charging chip, input current of the charging chip, system power consumption current, battery voltage, voltage difference adjustment threshold, battery internal resistance, etc., the One or more of them are used as calculation parameters for calculating the target output voltage of the adjustable charging device, and the target output voltage of the adjustable charging device is calculated. Then, adjust the voltage.

After each adjustment, the target output voltage of the adjustable charging device is recalculated according to the charging parameters measured in real time, so as to determine whether the current output voltage of the adjustable charging device meets the target output voltage. After continuous adjustment and calculation, until the difference between the output voltage of the current adjustable charging device and the target output voltage is smaller than a certain threshold (for example, a voltage difference adjustment threshold).

When the output voltage of the adjustable charging device is basically stable near the target output voltage, the charging efficiency will also be calculated to determine whether the current charging efficiency is too low. If it is lower than the predetermined threshold, it will also be recalculated according to the real-time measured charging parameters. The target output voltage of the adjustable charging device starts a new round of adjustment.

When the output voltage of the adjustable charging device is stable near the target output voltage, and the calculated charging efficiency also meets the predetermined threshold, it does not mean that it can always be charged at this voltage, because during the entire charging process, some charging parameters may will change. For example, when the user uses high-power-consuming software in the mobile terminal while charging again and again, the power consumption of the system increases, which may cause heat generation. At this time, it is necessary to recalculate the appropriate target output voltage and current charging efficiency. The output voltage is readjusted. Therefore, it is also possible to periodically calculate whether the target output voltage and charging efficiency can be satisfied according to the current charging parameters. If the current output voltage of the adjustable charging device does not meet the target output voltage, or the current charging efficiency is lower than a predetermined threshold, the output voltage of the adjustable charging device is readjusted.

Through the above-mentioned voltage adjustment process, in the case of constant current, it is necessary to take into account the charging speed and adjust the voltage to the target output voltage, periodically check whether the current charging situation can reach the predetermined target output voltage, and check whether the current charging efficiency is low at a predetermined threshold. Regardless of the current charging voltage or charging efficiency, as long as one of them fails to meet the standard, it will trigger recalculation of the target output voltage and adjust the voltage to reduce energy loss and achieve a balance between charging heat and efficiency.

The charging control method proposed in the embodiment of this application adjusts the voltage of the adjustable charging device during the constant current charging process, and balances the heat generation and efficiency of charging, so that the system can play the best role in charging modes in different scenarios. The best efficiency of the charging chip can reduce the energy loss during charging while ensuring the charging speed of the system. Under the same charging conditions, it can also reduce heat generation and improve the user experience in general.

In one embodiment, the real-time charging parameters of the mobile terminal include at least one of the following parameters: cable internal resistance, input voltage of the charging chip, input current of the charging chip, system power consumption current, battery voltage, voltage Difference adjustment threshold, battery internal resistance.

The real-time charging parameters of the mobile terminal include but are not limited to the above-mentioned parameters. When determining the target output voltage of the adjustable charging device based on the reference charging current of the adjustable charging device, it may also be affected by other factors not listed here. To list one by one, all factors that affect the calculation of the target output voltage of the adjustable charging device based on the reference charging current of the adjustable charging device can be used as real-time charging parameters of the mobile terminal.

In some embodiments, the real-time charging parameters of the mobile terminal include cable internal resistance, input voltage of the charging chip, input current of the charging chip, system power consumption current, battery voltage, voltage difference adjustment threshold;

In the step of determining the target output voltage of the adjustable charging device according to the reference charging current of the adjustable charging device and the real-time charging parameters of the mobile terminal, the adjustable charging device is calculated according to the following formula The target output voltage of:

Vbus_set=Klos*F(Vbus, Ibus, Ibus_set, Rcable, Isys, Vbat, Vbus_thres), where Klos is the error loss constant, Vbus is the input voltage of the charging chip, Ibus is the input current of the charging chip, and Ibus_set is the adjustable charging The reference charging current of the device, Rcable is the cable internal resistance, Isys is the system power consumption current, Vbat is the battery voltage, and Vbus_thres is the voltage difference adjustment threshold.

When the mobile terminal is initially connected to the charging device, it can be charged according to the ordinary charging method first, and then calculate the target output voltage of the adjustable charging device during the charging process; it can also be carried out according to some basic charging parameters pre-agreed in the selected charging strategy. Charge.

The reference charging current of the adjustable charging device is a value that has been determined at the beginning of charging, and the input voltage of the charging chip, the input current of the charging chip, and the battery voltage are all measured in real time. The calculation of the target output voltage of the adjustable charging device is calculated by combining these real-time measured charging parameters under the assumption that the reference charging current is constant.

Klos is an error loss constant, which is a fixed value, specifically 95%, indicating the error between the value calculated based on theory and the actual value. In actual work, different values can also be set according to the actual situation, or based on history multiple times Calculate an appropriate error loss constant value based on the statistical results of charging.

The internal resistance of cables varies with different types of charging equipment, and the internal resistance of batteries also varies with different types of mobile terminal batteries, and may change with the use of cables and batteries. In order to determine a more accurate target output voltage , the internal resistance of the cable and the internal resistance of the battery can be calculated before each charge. Of course, the calculation may also be performed according to the pre-estimated cable internal resistance and battery internal resistance in the selected charging strategy.

The power consumption of the system will vary greatly with the running programs in the mobile terminal. For example, the power consumption of the mobile phone when it is idle is very different from that of the mobile phone when the camera or game software is turned on. Therefore, it is necessary to periodically detect the power consumption of the system to determine The current actual system power consumption and the corresponding charging efficiency are used to determine whether the output voltage of the adjustable charging device needs to be adjusted.

The output voltage of the adjustable charging device does not have to be completely equal to the target output voltage. When the difference between the two is within the voltage difference adjustment threshold range, it is not necessary to frequently adjust the output voltage of the adjustable charging device to avoid excessive Calculations and voltage adjustments cause unnecessary losses. Only when the difference between the two is large enough to exceed the voltage difference adjustment threshold, will the adjustment of the output voltage of the adjustable charging device be triggered.

In some embodiments, in the step of determining the target output voltage of the adjustable charging device according to the reference charging current of the adjustable charging device and the real-time charging parameters of the mobile terminal, the output voltage of the adjustable charging device is calculated according to the following formula: Target output voltage:

Vbus_set=(Klos*(Vbus+Ibus*Rcable)*Ibus+(Isys*Vbat))/Ibus_set.

In some embodiments, the system power consumption current is calculated according to the following formula:

Isys=((Vbus*Ibus)*Ceff/(Vbat-Ibat*Rbat)-Ibat),

Among them, Vbus is the input voltage of the charging chip, Ibus is the input current of the charging chip, Ceff is the charging efficiency, Vbat is the battery voltage, Ibat is the battery current, and Rbat is the internal resistance of the battery.

In some embodiments, the charging efficiency is calculated according to the following formula:

Ceff=(Vbat*(Ibat+Isys))/(Vbus*Ibus),

Among them, Rbat is the internal resistance of the battery, Vbat is the battery voltage, Ibat is the battery current, Isys is the system power consumption current, Vbus is the input voltage of the charging chip, and Ibus is the input current of the charging chip.

In some embodiments, the cable internal resistance Rcable is calculated according to the following formula:

Among them, m is the number of voltage measurements, and m is a positive integer greater than 0, Ia is the reference current, and when the output current of the adjustable charging device is Ia, Vi is the adjustable charging voltage obtained from the ith measurement. The output voltage of the device, Vbusi is the input voltage of the charging chip obtained from the ith measurement.

In some embodiments, the battery internal resistance Rbat is calculated according to the following formula:

Among them, n is the number of times to measure the voltage and current, and n is a positive integer greater than 0, the current battery voltage Vb is obtained as the reference voltage, the current battery current Ib is used as the reference current, and the adjustable charging is set at the jth measurement When the output current of the device is Ij, ΔVbatj is the difference between the measured battery voltage and the reference voltage Vb, and ΔIbatj is the difference between the measured battery current and the reference current Ib.

The calculation formulas for the target output voltage, system power consumption current, charging efficiency, cable internal resistance, and battery internal resistance of the adjustable charging equipment proposed in this paper are just examples of specific formulas for calculating these indicators. The correlation before the parameters can be adjusted in the form of the calculation formula to achieve accurate calculation or estimation of each parameter and achieve a better charging effect.

In some embodiments, as shown in FIG. 3 , the step of judging whether the current output voltage of the adjustable charging device meets the target output voltage includes:

In step S321, calculating the voltage difference between the current output voltage of the adjustable charging device and the target output voltage of the adjustable charging device;

In step S322, when the voltage difference is greater than or equal to the voltage difference adjustment threshold, it is determined that the current output voltage of the adjustable charging device does not meet the target output voltage;

In step S323, when the voltage difference is smaller than the voltage difference adjustment threshold, it is determined that the current output voltage of the adjustable charging device satisfies the target output voltage.

As mentioned above, it is not as long as there is a slight difference between the output voltage of the current adjustable charging device and the target output voltage of the adjustable charging device, the voltage regulation is performed, only when the voltage difference is greater than or equal to the voltage difference When the threshold is adjusted, it is determined that the current output voltage of the adjustable charging device does not meet the target output voltage, and voltage adjustment is required. If the voltage difference is smaller than the voltage difference adjustment threshold, it is determined that the current output voltage of the adjustable charging device satisfies the target output voltage, and there is no need to adjust the voltage temporarily. If it is calculated that the charging efficiency is lower than the predetermined threshold, the recalculation of the target output voltage of the adjustable charging device will be triggered and the current output voltage will be readjusted; if the charging efficiency can also reach the predetermined threshold based on this calculation, no voltage adjustment is necessary , continue charging according to this voltage, until it is periodically detected that the current output voltage of the adjustable charging device does not meet the target output voltage, or the current charging efficiency is lower than the predetermined threshold, the output of the adjustable charging device voltage is regulated.

In some embodiments, as shown in FIG. 4 , the adjusting the current output voltage to the target output voltage includes:

In step S324, determine the adjustment step size supported by the adjustable charging device;

In step S325, if the current output voltage of the adjustable charging device is greater than the target output voltage, then reduce the voltage according to a positive integer multiple of the adjustment step;

In step S326, if the current output voltage of the adjustable charging device is lower than the target output voltage, the voltage is increased according to a positive integer multiple of the adjustment step size.

In order to reduce the complexity of adjustment and reduce the requirements for the adjustment accuracy of the charging equipment, in the process of adjusting the output voltage each time, it is not necessary to adjust the voltage too small, but according to the gear supported by the adjustable charging equipment Bit voltage, each gear voltage (such as 25 millivolts) is used as the adjustment step size, and each adjustment is set according to the multiple value of the gear voltage. When the voltage difference is large (such as 1520 millivolts), you can adjust multiple gear voltages (such as 1500 millivolts) at a time. When the voltage difference is small (such as 50 millivolts), you can only adjust one or two gears at a time. gear voltage.

In some embodiments, the mobile terminal includes at least one charging chip, and the overall charging efficiency is a weighted sum of charging efficiencies of the charging chips.

The embodiment of the present application can be applied to a system with dual charging chips and dual fuel gauges to charge a system with dual rechargeable batteries, and can even be used to charge a system with more charging chips to charge multiple rechargeable batteries. For multiple charging chips, the target output voltage, system power consumption current, cable internal resistance, battery internal resistance and other indicators of the relevant adjustable charging equipment are uniformly calculated, and the charging efficiency of each charging chip is calculated separately, and the charging efficiency of each charging chip is calculated. The weighted sum of efficiency is taken as the overall charging efficiency, and the best charging efficiency of each charging chip is exerted as much as possible.

In some embodiments, the method also includes:

generating a charging log according to the reference charging current of the adjustable charging device, and the relationship between the output voltage of the adjustable charging device and real-time charging parameters;

Upload the charging log to the server.

In the charging control method of the embodiment of the present application, the calculation process can also be performed on the server side. The mobile terminal performs voltage adjustment according to the charging control method of the embodiment of the present application, and generates a charging log based on the relationship between the reference charging current of the adjustable charging device and the output voltage of the adjustable charging device and real-time charging parameters at each adjustment. The server uses big data cloud computing to collect a large number of charging logs of mobile terminals as samples for learning, and trains to obtain a charging control model according to the charging control method of the embodiment of the present application.

Through the charging control model, the optimal charging strategy can be obtained according to the model and charging mode of the mobile terminal. After the mobile terminal obtains the charging strategy from the server, it only needs to use the real-time adjustable output voltage of the charging device and the charging parameters as input parameters, and can find the corresponding target output voltage in a fool-like manner without step-by-step adjustment and calculation. process. It not only saves the system resources of the mobile terminal, but also improves the charging efficiency of all mobile terminals within the management range of the server.

In order to train the charging control model on the server side, the charging log can be actively recorded through the mobile terminal, and the charging log can be uploaded to the server as a sample for subsequent learning and training.

In the second aspect, the embodiment of the present application provides a charging control method, as shown in FIG. 5 , including:

In step S410, various charging logs of the mobile terminal are obtained, and the charging log is a log generated by the mobile terminal executing the method described in any one of the first aspect;

In step S420, according to the charging log, determine charging strategies corresponding to various mobile terminal models, wherein the charging strategy includes the output voltage of the adjustable charging device, real-time charging parameters and the benchmark of the adjustable charging device The relationship between charging current.

In one embodiment, the method also includes:

According to the charging strategy request of the mobile terminal, the charging strategy corresponding to the model of the mobile terminal is delivered to the mobile terminal.

The charging control method of the embodiment of the present application can use big data cloud computing to carry out learning and training based on the server, and perform statistical learning on all mobile terminals using the same type, and finally train a better charging voltage adjustment scheme for this type of mobile terminal , save and record the adjustment plan, and send it directly to the mobile terminal of the user in the background, or send an alternative charging strategy to the mobile terminal in response to the request of the mobile terminal. The mobile terminal directly uses the configured scheme to charge, which reduces the amount of computation of the mobile terminal during the charging process, reduces the number of attempts to adjust the voltage, and can achieve a balance between charging speed, heat generation and charging efficiency faster.

In some embodiments, the determining charging strategies corresponding to various mobile terminal models according to the charging log includes:

extracting samples from said charging log;

Using the samples for training to obtain a neural network model, the input of the neural network model is the model of the mobile terminal, and the output is the charging strategy.

In the neural network training of big data cloud computing, the sample used is the reference charging current of the adjustable charging device recorded by the mobile terminal during the execution of the charging control method of the embodiment of the application, and the adjustable charging device The relationship between the output voltage and real-time charging parameters. A large number of charging logs of mobile terminals are used as samples, feature vectors are extracted, and a neural network model for charging control is obtained through training. Through the model, the corresponding charging strategy can be obtained according to the model of the mobile terminal as an alternative charging strategy for the corresponding mobile terminal.

In one embodiment, the charging strategies corresponding to various mobile terminal models include charging strategies in at least one of the following charging modes:

The highest charging efficiency mode, the shortest charging time mode, and the least heat generation mode.

In addition to the model of the mobile terminal, the neural network model used as charging control can also be trained to obtain charging strategies in different modes such as the highest charging efficiency mode, the shortest charging time mode, and the least heat generation mode, for mobile terminals to choose according to specific needs .

In a third aspect, the embodiment of the present application provides a charging control method, as shown in FIG. 6 , the method includes:

In step S510, according to the model of the mobile terminal, the charging strategy obtained from the server is used as an alternative charging strategy, wherein the charging strategy is the server in the charging control method according to any one of the second aspect Determined charging strategy;

In step S520, selecting a charging strategy for charging from at least one of the alternative charging strategies;

In step S530, during the charging process, the output voltage of the adjustable charging device is adjusted according to the charging strategy for charging.

In one embodiment, the charging strategy includes a charging strategy in at least one of the following charging modes:

The charging control method of the embodiment of the present application not only includes the steps of gradually adjusting the voltage according to S100 and S200, but also includes learning and training according to the charging control method of the embodiment of the present application under different charging modes such as efficiency, speed, and heat generation to obtain various charging modes. Optimal charging strategy in charging mode. The specific learning and training process may not be carried out in the mobile terminal, but the learning and training are based on the output voltage and real-time charging parameters of the adjustable charging device and the adjustable charging device during the execution of the charging control method in the embodiment of the application. The relationship between the reference charging currents of the equipment is obtained to obtain the optimal charging strategy in each charging mode. The mobile terminal can choose among alternative charging strategies according to specific needs, omitting the specific calculation and adjustment process, and directly adjust according to the corresponding voltage given in the charging strategy.

In some embodiments, before using the charging strategy received from the server as the alternative charging strategy, the method includes:

Send a charging policy request to the server.

The alternative charging strategy can be preset by the mobile terminal, or can be obtained from the server. As mentioned above, the mobile terminal records the reference charging current of the adjustable charging device and the relationship between the output voltage of the adjustable charging device and real-time charging parameters during the process of executing the charging control method of the embodiment of the application, and generates a charging Logs, the server side uses big data cloud computing to learn and train the charging logs of a large number of different types of mobile terminals, conduct statistical learning on the charging logs of the same type of mobile terminals, and finally train the best mobile terminals for this type The charging voltage adjustment plan is saved and recorded to form an alternative charging strategy, which is directly issued to the mobile terminal in the background, or is issued to the mobile terminal in response to the request of the mobile terminal. The mobile terminal directly uses the configured scheme to charge, which reduces the amount of calculation of the mobile terminal during the charging process, reduces the number of attempts to adjust the voltage, and can achieve a balance between charging speed, heat generation and charging efficiency faster.

The specific application of the charging control method described in the first aspect to the third aspect of the present application in the actual charging process will be introduced in detail below in combination with three embodiments.

Example 1

This embodiment relates to a mobile terminal with dual charging chips, and FIG. 7 is a schematic hardware block diagram of the charging control method provided by this embodiment.

Among them, USB_IN is the input of Universal Serial Bus (USB, Universal Serial Bus) or adjustable charging equipment; VBAT_SYS is the output of battery power supply to the system, which is used as the input of system power supply.

The first charging module is a charging chip of the system, the second charging module is the second charging chip of the system, and the two charging chips charge the system at the same time; the fuel gauge is used to detect and calculate the power of the battery.

The software framework of this embodiment is shown in Figure 8, which includes the following six units: an adjustable charging device output voltage adjustable detection unit, a battery internal resistance detection unit, a charging cable internal resistance detection unit, and a system power consumption detection and estimation unit , Adjustable charging equipment output voltage adjustment unit, charging efficiency statistical detection unit.

Adjustable charging device output voltage adjustable detection unit, used to detect the insertion of the adjustable charging device, and detect whether the currently charging adjustable charging device supports the output voltage adjustment function, if it does not support the adjustment, then use the fixed voltage directly Charging, that is, the usual charging method.

The internal resistance detection unit of the battery is used to detect and estimate the internal resistance of the battery during current charging. For different charging currents and different battery temperatures, the performance of the internal resistance of the battery is different, and different batteries will affect the final adjustable The charging device output voltage. Record the detected battery voltage and battery current to calculate the internal resistance of the battery.

Charging cable internal resistance detection unit, this module is used to detect and estimate the internal resistance of the currently used charging cable. Different cables have different internal resistances, and cables with different internal resistances will affect the final adjustable charging. device output voltage. Record the detected battery voltage and battery current to calculate the internal resistance of the cable.

The system power consumption detection and estimation unit periodically conducts system business power consumption statistics during the charging process, and different business power consumption will eventually affect the final output voltage of the adjustable charging device. If it is standby charging, the power consumption of the system can be ignored. If the system is running, the power consumption of the system needs to be estimated, and the estimated system power consumption should be recorded. The system power consumption will eventually participate in the charging efficiency statistical detection unit to evaluate the charging efficiency.

The adjustable charging device output voltage adjustment unit is the core unit of this patent. It adjusts the output voltage of the adjustable charging device according to the maximum charging power set by the current system, the charging cable used, and the power consumption statistics of the current system. Adjust the voltage of the adjustable charging device to an appropriate voltage for charging. The following functional relationship can be used to calculate the target output voltage of the adjustable charging device:

Vbus_set=Klos*F(Vbus, Ibus, Ibus_set, Rcable, Isys, Vbat, Vbus_thres).

Among them, the function parameter of the maximum charging power set by the system is shown in the reference input current Ibus_set of the adjustable charging device, according to the calculated internal resistance Rcable of the cable, and the calculated internal resistance Rbat of the battery, and the calculation and setting adjustment according to Vbus_set, Klos is an error loss constant parameter, which is a fixed value, specifically 95%, indicating the error between the value calculated based on theory and the actual value. In practice, different values can also be set in actual situations.

Charging efficiency statistical detection unit, which is used to statistically calculate the overall efficiency of the current charging, use this efficiency to further detect and evaluate whether the adjustment under the current charging voltage is reasonable, and further feed back to the adjustable charging device voltage adjustment unit for fine-tuning to prevent There are large abnormal fluctuations in the adjustment.

Example 2

The entire charging control process of the charging control method is shown in FIG. 9 .

S601. If no charger is plugged in, execute in a loop and continue to wait.

S602. When the system detects that the charger is plugged in, the charger output voltage adjustable detection unit module first detects that the charger output voltage is adjustable. If it is detected that the charger supports the voltage regulation function, go to S603. If the charger does not support the voltage regulation function, then charge with a fixed voltage.

S603. If the charger supports voltage regulation detection, the battery internal resistance detection unit performs battery internal resistance detection. As shown in Figure 10, during the detection, within the current range of the charging current, three current points of low current, medium current and maximum current can be selected to detect the internal resistance of the battery, which are recorded as Rbat1, Rbat2 and Rbat3 respectively. After completion, calculate the final average internal resistance Rbat, record and save it. When testing, first set the charging voltage of 5V and the charging current of 0.5A to calculate the internal resistance Rbat1 of the first battery; delay for a certain time, then set the charging current to 1.5A, and calculate the internal resistance Rbat2 of the second battery; then delay for a certain time time, set the charging current to 3A, and calculate the internal resistance Rbat3 of the third battery. The formula for calculating the internal resistance of the battery is as follows:

Rbat (miohms) = ((ΔVbat1/ΔIbat1)+(ΔVbat2/ΔIbat2)+(ΔVbat3/ΔIbat3))*1000/3.

In practice, there can also be a more refined method for the internal resistance of the battery, or to find the corresponding internal resistance of the battery according to the correspondence table of the battery voltage, battery current, and battery temperature, and methods involving related deformations are also within the scope of this patent. After calculating the internal resistance of the battery, set the charging current to 1A and enter S604.

S604. After the internal resistance of the battery is calculated, the internal resistance detection unit of the charging cable is used to detect the internal resistance of the charging cable. As shown in Figure 11, within the charging voltage range, select low voltage, medium voltage and maximum voltage for cable internal resistance detection. The analysis records are Rcable1, Rcable2, and Rcable3. After the detection is completed, Calculate the final average internal resistance Rcable, record and save it, first set the voltage of 5V when testing, set the charging current of 1A, and calculate the internal resistance Rcable1 of the first cable when the charging current is 1A, with a certain delay Set the voltage of 7V and the current of 1A for charging, calculate the internal resistance Rcable2 of the second cable, set the voltage of 9V and charge the current of 1A after a certain delay, calculate the internal resistance Rcable3 of the third cable, and calculate the internal resistance of the third cable Rcable3. The resistance calculation formula is as follows:

Rcable (milliohms) = (((5-Vbus1)+(7-Vbus2)+(9-Vbus3))*1000/1)/3.

In practice, there can also be a more refined internal resistance calculation method, which can be calculated in more current gears, or according to the voltage of Vbus and the current of Ibus to find the internal resistance of the cable that has been set, and the internal resistance of different cables Resistance is all within the scope of protection of this patent.

After the detection of the internal resistance of the cable is completed, it will be charged according to the maximum power set by the system to the maximum voltage that the system can support. The system may be in various power consumption modes during charging. In the initial situation, the system function can be preset. If the power consumption Isys is 0, first perform voltage adjustment calculation according to the current parameters and enter S606.

S605. The adjustable charging device output voltage adjusting unit calculates whether it is necessary to adjust the output voltage of the adjustable charging device according to the current charging situation. The charging voltage adjustment process is shown in Figure 12. The specific parameters currently required are obtained, and the target output voltage of the adjustable charging device is calculated according to the previous reference function relationship:

Vbus_set=Klos*F(Vbus, Ibus, Ibus_set, Rcable, Isys, Vbat, Vbus_thres).

Among them, Klos is an error loss constant parameter, which is a fixed value, specifically 95%, indicating the error between the value calculated based on theory and the actual value, and different values can also be set in practice.

Obtain the current actual charging input voltage Vbus, obtain the current actual charging input current Ibus, obtain the calculated cable internal resistance Rcable, obtain the corresponding battery voltage Vbat when calculating Isys, and the preset input voltage adjustment threshold value Vbus_thres , the initial default is that Isys is 0, and the required Vbus_set value is calculated according to these parameters:

Vbus_set=(Klos*(Vbus+Ibus*Rcable)*Ibus+(Isys*Vbat))/Ibus_set.

Then, make a difference between the current Vbus and the target output voltage Vbus_set to obtain the result Vbus_diff. At the beginning, the Vbus_set value is the maximum charging voltage. Comparing Vbus_diff with Vbus_thres, if the difference is found to be large, such as greater than 1520 millivolts, this value can also be preset and changed in practice, then it is considered that the current Vbus is relatively large, and then Vbus is lowered by an adjustable charging device support The gear voltage (25 millivolts) can also be set according to the multiple value of the gear voltage in practice, such as 50 millivolts, and the embodiment of the present application does not specifically refer to 25 millivolts. If the difference is found to be small, such as less than 500 millivolts, then add a gear voltage (25 millivolts) supported by the adjustable charging device. In practice, it can also be set according to the multiple value of the gear voltage, such as 50 millivolts , the embodiment of this application does not specifically refer to 25 millivolts. After setting, it is necessary to update the Vbus_set value to the currently set adjustable charging device voltage value. After the voltage adjustment is completed, the charging will be charged normally according to the settings under the current parameters, and wait for the next time Adjustment.

S606. After adjusting and calculating the output voltage of the adjustable charging device, calculate the actual power consumption Isys consumed by the system according to the set maximum power and maximum voltage during charging, and calculate the actual power consumption Isys of the system. The calculation formula is as follows:

Isys=((Vbus*Ibus)*Ceff/(Vbat−Ibat*Rbat)−Ibat).

Among them, Vbus is the actual input voltage of the charging chip, Ibus is the actual input current of the charging chip, Vbat is the voltage of the battery, and the internal resistance Rbat of the battery is also calculated here, and Ibat is the charging current of the battery. Record and save the results of the calculation. The initial default charging efficiency Ceff is 85%. Calculate Isys and save it. At the same time, save the Vbat corresponding to the calculated Isys. It needs to be used in subsequent voltage adjustments. This charging efficiency value Ceff will change. Wait for the next time. When the new charging efficiency is counted, the new charging efficiency will be used as the parameter value for the next calculation. The dynamic change of Ceff charging efficiency can better reflect the dynamic statistics of power consumption.

S607. According to the adjusted charging voltage, the current power consumption Isys of the system, and the voltage and current for charging the battery, perform statistics on the charging efficiency of the system, the formula is as follows:

Ceff=(Vbat*(Ibat+Isys))/(Vbus*Ibus).

If the system is designed with multiple charging chips, the efficiency of each charging chip can also be calculated and counted. Count these efficiencies together to evaluate and decide whether the output voltage of the current adjustable charging equipment is in a better state. Feedback the obtained charging efficiency at Ceff to the charging voltage regulation module, if Ceff is lower than 80%, then it is necessary to trigger and adjust the output voltage of the adjustable charging device. If a large load change occurs in the system power consumption, it is also necessary to trigger charging voltage regulation.

S608 , completing a process of adjustment, and at this time, the system is in the process of normal charging. If the cycle of the preset value is not reached, the charging will continue according to the original parameters, and if the cycle of the preset value is reached, then the next adjustment will be performed.

Example 3

In this embodiment, the calculation process in the charging control method is implemented on the server side.

The mobile terminal performs voltage adjustment according to the charging control method of the embodiment of the present application, and generates a charging log based on the relationship between the reference charging current of the adjustable charging device and the output voltage of the adjustable charging device and real-time charging parameters at each adjustment, Upload the charging log to the server. The server uses big data cloud computing to collect a large number of charging logs of mobile terminals as samples for learning, and trains to obtain a charging control model according to the charging control method of the embodiment of the present application.

In a fourth aspect, the embodiment of the present application provides an electronic device, as shown in FIG. 13 , which includes:

one or more processors 501;

Memory 502, on which one or more programs are stored, and when one or more programs are executed by one or more processors, one or more processors realize the charging of any one of the first to third aspects above Control Method;

One or more I/O interfaces 503 are connected between the processor and the memory, and are configured to realize information exchange between the processor and the memory.

Wherein, the processor 501 is a device with data processing capability, which includes but not limited to a central processing unit (CPU), etc.; the memory 502 is a device with data storage capability, which includes but not limited to a random access memory (RAM, more specifically Such as SDRAM, DDR, etc.), read-only memory (ROM), electrified erasable programmable read-only memory (EEPROM), flash memory (FLASH); I/O interface (read-write interface) 503 is connected between processor 501 and memory 502 , can realize information interaction between the processor 501 and the memory 502, which includes but not limited to a data bus (Bus) and the like.

In some embodiments, the processor 501 , the memory 502 and the I/O interface 503 are connected to each other through the bus 504 , and further connected to other components of the computing device.

In the fifth aspect, the embodiment of the present application provides a computer-readable storage medium. As shown in FIG. 14 , a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the above-mentioned first aspect to the third aspect are realized. Any one of the charge control methods.

The charging control method proposed in the embodiment of this application adjusts the voltage of the adjustable charging device during the constant current charging process, and balances the heat generation and efficiency of charging, so that the system can play the best role in charging modes in different scenarios. The best efficiency of the charging chip can reduce the energy loss during charging while ensuring the charging speed. Under the same charging conditions, it can also reduce heat generation and improve the user experience in general.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, the functional modules/units in the system, and the device can be implemented as software, firmware, hardware, and an appropriate combination thereof.

In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components. Components cooperate to execute. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit . Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. permanent, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

The preferred embodiments of the present application have been described above with reference to the accompanying drawings, and the scope of rights of the present application is not limited thereby. Any modifications, equivalent replacements and improvements made by those skilled in the art without departing from the scope and essence of the application shall fall within the scope of rights of the application.

Claims

A charging control method, comprising:

Determine the current overall charging efficiency;

When the current overall charging efficiency is lower than a predetermined threshold, the output voltage of the adjustable charging device is adjusted according to the reference charging current of the adjustable charging device and the real-time charging parameters of the mobile terminal, so as to improve the charging efficiency of the mobile terminal. overall charging efficiency.
The charging control method according to claim 1, wherein, before said determining the current overall charging efficiency, said charging control method further comprises:

determining the target output voltage of the adjustable charging device according to the reference charging current of the adjustable charging device and the real-time charging parameters of the mobile terminal;

If the current output voltage of the adjustable charging device does not meet the target output voltage, the current output voltage is adjusted to the target output voltage.
The charging control method according to claim 1, wherein the real-time charging parameters of the mobile terminal include at least one of the following parameters: cable internal resistance, input voltage of the charging chip, input current of the charging chip, system power Current consumption, battery voltage, voltage difference adjustment threshold, battery internal resistance.
The charging control method according to claim 3, wherein the real-time charging parameters of the mobile terminal include cable internal resistance, input voltage of the charging chip, input current of the charging chip, system power consumption current, battery voltage, and voltage difference Adjust the threshold;

In the step of determining the target output voltage of the adjustable charging device according to the reference charging current of the adjustable charging device and the real-time charging parameters of the mobile terminal, the adjustable charging device is calculated according to the following formula The target output voltage of:

Vbus_set=Klos*F (Vbus, Ibus, Ibus_set, Rcable, Isys, Vbat, Vbus_thres), wherein, Klos is the error loss constant, Vbus is the input voltage of the charging chip, Ibus is the input current of the charging chip, Ibus_set is the reference charging current of the adjustable charging device, Rcable is the internal resistance of the cable, Isys is the system power consumption current, Vbat is the battery voltage, and Vbus_thres is the voltage difference adjustment threshold.
The charging control method according to claim 4, wherein, in the step of determining the target output voltage of the adjustable charging device according to the reference charging current of the adjustable charging device and the real-time charging parameters of the mobile terminal, it is calculated according to the following formula The target output voltage of the adjustable charging device:

Vbus_set=(Klos*(Vbus+Ibus*Rcable)*Ibus+(Isys*Vbat))/Ibus_set.
The charging control method according to claim 4, wherein the system power consumption current is calculated according to the following formula:

Isys=((Vbus*Ibus)*Ceff/(Vbat-Ibat*Rbat)-Ibat),

Wherein, Vbus is the input voltage of the charging chip, Ibus is the input current of the charging chip, Ceff is the charging efficiency, Vbat is the battery voltage, Ibat is the battery current, and Rbat is the internal resistance of the battery.
The charging control method according to claim 3, wherein the charging efficiency is calculated according to the following formula:

Ceff=(Vbat*(Ibat+Isys))/(Vbus*Ibus),

Wherein, Rbat is the battery internal resistance, Vbat is the battery voltage, Ibat is the battery current, Isys is the system power consumption current, Vbus is the input voltage of the charging chip, and Ibus is the input current of the charging chip.
The charging control method according to claim 3, wherein the cable internal resistance Rcable is calculated according to the following formula:

Among them, m is the number of voltage measurements, and m is a positive integer greater than 0, Ia is the reference current, and when the output current of the adjustable charging device is Ia, Vi is the adjustable charging voltage obtained from the ith measurement. The output voltage of the device, Vbusi is the input voltage of the charging chip obtained from the ith measurement.
The charging control method according to claim 3, wherein the battery internal resistance Rbat is calculated according to the following formula:

Among them, n is the number of times to measure the voltage and current, and n is a positive integer greater than 0, the current battery voltage Vb is obtained as the reference voltage, the current battery current Ib is used as the reference current, and the adjustable charging is set at the jth measurement When the output current of the device is Ij, ΔVbatj is the difference between the measured battery voltage and the reference voltage Vb, and ΔIbatj is the difference between the measured battery current and the reference current Ib.
The charging control method according to claim 2, wherein the step of judging that the current output voltage of the adjustable charging device does not meet the target output voltage comprises:

calculating the voltage difference between the current output voltage of the adjustable charging device and the target output voltage of the adjustable charging device;

When the voltage difference is greater than or equal to the voltage difference adjustment threshold, it is determined that the current output voltage of the adjustable charging device does not meet the target output voltage;

When the voltage difference is smaller than the voltage difference adjustment threshold, it is determined that the current output voltage of the adjustable charging device satisfies the target output voltage.
The charging control method according to claim 2, wherein said adjusting the current output voltage to the target output voltage comprises:

Determine the adjustment step size supported by the adjustable charging device;

If the current output voltage of the adjustable charging device is greater than the target output voltage, then reduce the voltage according to a positive integer multiple of the adjustment step;

If the current output voltage of the adjustable charging device is lower than the target output voltage, the voltage is increased according to a positive integer multiple of the adjustment step size.
The charging control method according to any one of claims 1 to 11, wherein the mobile terminal includes at least one charging chip, and the overall charging efficiency is a weighted sum of charging efficiencies of the charging chips.
The charging control method according to any one of claims 1 to 11, wherein, after adjusting the output voltage of the adjustable charging device, further comprising:

generating a charging log according to the reference charging current of the adjustable charging device, and the relationship between the output voltage of the adjustable charging device and real-time charging parameters;

Upload the charging log to the server.
A charging control method, comprising:

Acquiring charging logs of various mobile terminals, the charging logs are logs generated by the mobile terminal executing the method described in any one of claims 1 to 12;

According to the charging log, determine charging strategies corresponding to various mobile terminal models, wherein the charging strategy includes the difference between the output voltage of the adjustable charging device, real-time charging parameters and the reference charging current of the adjustable charging device relation.
The charging control method according to claim 14, wherein said determining charging strategies corresponding to various mobile terminal models according to the charging log includes:

extracting samples from said charging log;

Using the samples for training to obtain a neural network model, the input of the neural network model is the model of the mobile terminal, and the output is the charging strategy.
The charging control method according to claim 14, wherein the charging strategies corresponding to various mobile terminal models include charging strategies in at least one of the following charging modes:

The highest charging efficiency mode, the shortest charging time mode, and the least heat generation mode.
The charging control method according to claim 14, wherein the method further comprises:

According to the charging strategy request of the mobile terminal, the charging strategy corresponding to the model of the mobile terminal is delivered to the mobile terminal.
A charging control method, comprising:

According to the model of the mobile terminal, the charging strategy obtained from the server is used as an alternative charging strategy, wherein the charging strategy is the charging strategy determined by the server in the charging control method according to any one of claims 14 to 17 Strategy;

selecting a charging strategy for charging from at least one of the alternative charging strategies;

During the charging process, the output voltage of the adjustable charging device is adjusted according to the charging strategy for charging.
The charging control method according to claim 18, wherein before said using the charging strategy received from the server as the alternative charging strategy, comprising:

Send a charging policy request to the server.
An electronic device comprising:

one or more processors;

A memory, on which one or more programs are stored, and when the one or more programs are executed by the one or more processors, the one or more processors implement the process according to any one of claims 1 to 19 The charging control method described in the item;

One or more I/O interfaces are connected between the processor and the memory, configured to realize information exchange between the processor and the memory.
A computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the charging control method according to any one of claims 1 to 19 is realized.