WO2020062128A1

WO2020062128A1 - Method and apparatus for controlling charging of mobile terminal

Info

Publication number: WO2020062128A1
Application number: PCT/CN2018/108570
Authority: WO
Inventors: 田晨
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-09-29
Filing date: 2018-09-29
Publication date: 2020-04-02
Also published as: CN110546845A; CN110546845B

Abstract

The present application discloses a method and apparatus for controlling charging of a mobile terminal. The method comprises: entering a constant-current charging mode, and obtaining a present temperature and a present current of a battery of the mobile terminal; determining a corresponding float voltage according to the present temperature and the present current of the battery; and obtaining a rated voltage of the battery, and charging the battery according to the float voltage and the rated voltage. The method charges a battery according to a float voltage and a rated voltage, increases constant-current charging time, and reduces constant-voltage charging time, thereby effectively improving charging efficiency and avoiding overvoltage damage to the battery.

Description

Charging control method and charging control device for mobile terminal

Technical field

The present application relates to the field of power electronics technology, and in particular, to a charging control method for a mobile terminal, a charging control device for a mobile terminal, an electronic device, and a non-transitory computer-readable storage medium.

Background technique

The battery charging process is mainly divided into three phases: trickle, constant current, and constant voltage. The purpose is to keep the battery from overcurrent when the battery is low and not overvoltage when the battery is high.

In order to ensure that the battery is not overvoltage, when the battery voltage reaches the rated voltage of the battery, it enters the constant voltage charging stage. In the related art, the battery has a longer constant voltage stage during the charging process, which results in a longer time to fully charge and affects the charging efficiency.

Summary of the Invention

The present application provides a charging control method and device for a mobile terminal, which can increase the constant current charging time, reduce the constant voltage charging time, effectively improve the charging efficiency, and ensure that the battery is not damaged under voltage.

An embodiment of the first aspect of the present application proposes a charging control method for a mobile terminal, including: entering a constant current charging mode, and acquiring a current temperature and a current of a battery of the mobile terminal; according to the current temperature of the battery and the The current current determines the corresponding floating voltage; and obtains the rated voltage of the battery, and charges the battery according to the floating voltage and the rated voltage.

According to the charging control method for a mobile terminal according to the embodiment of the present application, when entering a constant current charging mode, the current temperature and current of the battery of the mobile terminal are obtained, and the corresponding floating pressure is determined according to the current temperature and current of the battery, and then obtained. The rated voltage of the battery, and the battery is charged according to the floating voltage and the rated voltage. This method charges the battery according to the floating pressure and the rated voltage, which can increase the constant current charging time, reduce the constant voltage charging time, effectively improve the charging efficiency, and ensure that the battery is not damaged by overvoltage.

In addition, the charging control method for a mobile terminal according to the foregoing embodiments of the present application may also have the following additional technical features:

According to an embodiment of the present application, the charging the battery according to the floating voltage and the rated voltage includes: generating a cut-off voltage according to the floating pressure and the rated voltage, and obtaining The corresponding cut-off current; if the current voltage reaches the cut-off voltage, it switches to the constant voltage charging mode; if the current current reaches the cut-off current, the charging is terminated.

According to an embodiment of the present application, determining the corresponding floating pressure according to the current temperature of the battery and the current current includes: querying a comparison table according to the current temperature of the battery and the current current to obtain the corresponding floating voltage. Press, wherein the lookup table is obtained through experiments.

According to an embodiment of the present application, the temperature of the battery is inversely proportional to the internal resistance of the battery, and the internal resistance of the battery is related to the floating pressure.

An embodiment of the second aspect of the present application proposes a charging control device for a mobile terminal, including: an acquisition module, which is configured to enter a constant current charging mode and acquire a current temperature and a current of a battery of the mobile terminal; determine A module, the determining module is configured to determine a corresponding floating pressure according to the current temperature of the battery and the current, a control module is used to obtain a rated voltage of the battery, and according to the floating pressure and The rated voltage charges the battery.

According to the charging control device for a mobile terminal in the embodiment of the present application, when the acquisition module enters the constant current charging mode, the current temperature and current of the battery of the mobile terminal are acquired, and the determination module determines the corresponding floating pressure according to the current temperature and current of the battery. The control module obtains the rated voltage of the battery and charges the battery according to the floating pressure and the rated voltage. The device charges the battery according to the floating pressure and the rated voltage, which can increase the constant current charging time, reduce the constant voltage charging time, effectively improve the charging efficiency, and can ensure that the battery is not damaged under voltage.

In addition, the charging control device for a mobile terminal according to the foregoing embodiments of the present application may also have the following additional technical features:

According to an embodiment of the present application, the control module is specifically configured to: generate a cutoff voltage according to the floating voltage and the rated voltage, and obtain a corresponding cutoff current according to the cutoff voltage; if the current voltage reaches the cutoff voltage , It switches to a constant voltage charging mode; if the current current reaches the cut-off current, charging is terminated.

According to an embodiment of the present application, the determining module is further configured to: query a comparison table to obtain a corresponding floating pressure according to the current temperature of the battery and the current current, wherein the comparison table is obtained through experiments.

An embodiment of the third aspect of the present application provides an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the program, In order to implement the charging control method for a mobile terminal according to the embodiment of the first aspect of the present application.

In the electronic device of the embodiment of the present application, when the processor executes a computer program stored in a memory and enters a constant current charging mode, the current temperature and current of the battery of the mobile terminal are obtained, and then determined according to the current temperature and current of the battery. Corresponding floating voltage, then obtain the rated voltage of the battery, and charge the battery according to the floating pressure and the rated voltage to improve the constant current charging time, reduce the constant voltage charging time, effectively improve the charging efficiency, and ensure that the battery is not damaged under voltage .

The embodiment of the fifth aspect of the present application provides a non-transitory computer-readable storage medium on which a computer program is stored, and the program is executed by a processor to implement the movement described in the embodiment of the first aspect of the present application. Terminal charging control method.

In the non-transitory computer-readable storage medium of the embodiment of the present application, when the processor executes the computer program stored on the storage medium, when entering the constant current charging mode, the current temperature and current of the battery of the mobile terminal are obtained, and then according to The current temperature and current of the battery determine the corresponding floating pressure, and then obtain the rated voltage of the battery, and charge the battery according to the floating pressure and rated voltage to improve the constant current charging time, reduce the constant voltage charging time, and effectively improve the charging efficiency. , And can ensure that the battery is not damaged under pressure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

1 is a flowchart of a charging control method for a mobile terminal according to an embodiment of the present application;

2 is an equivalent model diagram of a battery according to an embodiment of the present application;

3 is a schematic diagram of a relationship between a battery resistance and a temperature according to an embodiment of the present application;

4 is a schematic diagram of a relationship between battery current and temperature according to an embodiment of the present application;

5 is a relationship diagram between a battery current and a withstand voltage according to an embodiment of the present application;

FIG. 6 is a schematic block diagram of a charging control device for a mobile terminal according to an embodiment of the present application.

detailed description

Hereinafter, embodiments of the present invention will be described in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless specifically defined otherwise.

Any process or method description in a flowchart or otherwise described herein can be understood as a module, fragment, or portion of code that includes one or more executable instructions for implementing a particular logical function or step of a process And, the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved, which should It is understood by those skilled in the art to which the embodiments of the present invention pertain.

The following describes the charging control method of the mobile terminal, the charging control device of the mobile terminal, the electronic device, and the non-transitory computer-readable storage medium according to the embodiments of the present application with reference to the accompanying drawings.

FIG. 1 is a flowchart of a charging control method for a mobile terminal according to an embodiment of the present application. As shown in Figure 1, the method includes the following steps:

S1. Enter the constant current charging mode and obtain the current temperature and current of the battery of the mobile terminal.

S2. Determine the corresponding floating pressure according to the current temperature and current of the battery.

Further, in the embodiment of the present application, determining the corresponding floating pressure according to the current temperature and current of the battery may include: querying a comparison table to obtain the corresponding floating pressure according to the current temperature and current of the battery, where the comparison table Obtained through experiments. The experiments include: obtaining the temperature value of the battery under different currents, and the withstand voltage value of the battery under different currents. The battery temperature is inversely proportional to the battery's internal resistance, which is related to the floating pressure.

Specifically, due to the presence of DC impedance and polarization impedance in the battery cell, the current voltage will float high when the battery is charging, that is, there is a floating voltage V1, OCV = V1 + VBAT, where OCV is the current voltage of the battery , V1 is the floating voltage, VBAT is the actual voltage of the battery, V1 = I * R, where I is the current of the battery, and R is the internal resistance of the battery, which includes DC resistance and polarization resistance. Because, as shown in FIG. 3, the internal resistance of the battery is related to the temperature of the battery, the internal resistance of the high temperature battery is small, and the internal resistance of the low temperature battery is large. The temperature of the battery is related to the current of the battery. Therefore, the temperature value T of the battery under different currents I can be obtained through related experiments in advance, and the relationship curve is generally shown in Figure 4; then the maximum withstand voltage value Vmax of the battery under different currents I is measured through correlation, that is, The maximum voltage value at which the battery can not cause damage to the battery under different currents I. The relationship curve is generally shown in Figure 5. Subtract the maximum voltage value Vmax from the battery's rated voltage VBAT to obtain the battery at the corresponding current I Floating pressure. Therefore, by synthesizing the graphs of FIG. 4 and FIG. 5 and analyzing the relevant data, the distribution of the battery's floating voltage value at a specific temperature and current can be obtained and stored in the form of a table. By querying the floating pressure distribution table, the current temperature of the battery and the floating pressure V1 corresponding to the current can be obtained.

S3. Obtain the rated voltage of the battery, and charge the battery according to the floating pressure and the rated voltage.

Further, charging the battery according to the floating voltage and the rated voltage may include: generating a cut-off voltage according to the floating voltage and the rated voltage, and obtaining a corresponding cut-off current according to the cut-off voltage; if the current voltage reaches the cut-off voltage, switching to constant voltage charging Mode; if the current reaches the cut-off current, charging is terminated.

Specifically, due to the presence of DC impedance and polarization impedance in the battery cell, the current voltage will float high when the battery is charging, and there is a floating voltage V1, as shown in Figure 2, the current voltage of the battery is equal to the floating voltage and The sum of the actual battery voltage, that is, OCV = V1 + VBAT, where OCV is the current voltage of the battery, V1 is the floating voltage, and VBAT is the actual voltage of the battery.

In related technology, since VBAT cannot be measured, only OCV can be measured. Therefore, it is determined whether to enter the constant voltage charging mode according to the current voltage OCV and the rated voltage of the battery, that is, if the current voltage OCV of the battery reaches the rated voltage, the constant voltage charging mode is entered. . The inventor has found through a large number of tests that as long as the actual battery voltage VBAT voltage does not exceed the rated voltage, the battery will not be damaged. During the entire charging cycle, the longer the charging time of the constant current charging mode is, the faster the charging time is. To increase the charging speed, it is necessary to increase the constant current charging time as much as possible and reduce the constant voltage charging time.

Therefore, in this application, after entering the constant current charging mode, the current temperature and current of the battery of the mobile terminal are obtained, and then the corresponding floating pressure V1 is obtained by querying the preset floating pressure distribution table according to the current temperature and current. Then, according to the floating voltage and rated voltage, obtain the voltage threshold value from the constant current charging mode to the constant voltage charging mode, that is, (V1 + VBAT) as the cut-off voltage (the voltage threshold of the constant current charging mode to enter the constant voltage charging mode), and switch to The voltage threshold of the constant voltage charging mode is increased. As a result, the constant-current charging time can be increased, the constant-voltage charging time can be reduced, the charging efficiency can be effectively improved, and the battery can be protected from overvoltage damage. At the same time, the corresponding cut-off current is also obtained according to the cut-off voltage. After entering the constant voltage charging mode, if the current of the battery reaches the cut-off current, the charging is terminated to complete the charging of the mobile terminal.

In summary, according to the charging control method for a mobile terminal according to the embodiment of the present application, when entering the constant current charging mode, the current temperature and current of the battery of the mobile terminal are obtained, and the corresponding floating pressure is determined according to the current temperature and current of the battery. , Then get the rated voltage of the battery, and charge the battery based on the floating voltage and rated voltage. This method charges the battery according to the floating pressure and the rated voltage, which can increase the constant current charging time, reduce the constant voltage charging time, effectively improve the charging efficiency, and ensure that the battery is not damaged by overvoltage.

Corresponding to the above-mentioned charging control method for a mobile terminal, an embodiment of the present application further proposes a charging control device for a mobile terminal. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

FIG. 6 is a schematic block diagram of a charging control device for a mobile terminal according to an embodiment of the present application. As shown in FIG. 6, the device includes: an acquisition module 10, a determination module 20, and a control module 30.

The obtaining module 10 is configured to obtain a current temperature and a current of a battery of the mobile terminal when the constant current charging mode is entered. The determining module 20 is configured to determine a corresponding floating pressure according to a current temperature and a current of the battery. The control module 30 is configured to obtain a rated voltage of the battery, and charge the battery according to the floating voltage and the rated voltage.

Further, in the embodiment of the present application, the control module 30 is specifically configured to: generate a cutoff voltage according to the floating voltage and the rated voltage, and obtain a corresponding cutoff current according to the cutoff voltage; if the current voltage reaches the cutoff voltage, switch to a constant voltage Charging mode; when the current reaches the cut-off current, charging is terminated.

According to an embodiment of the present application, the determination module 20 may be further configured to: query a comparison table to obtain the corresponding floating pressure according to the current temperature and current of the battery, where the comparison table is obtained through experiments, and the experiments include: The temperature value under the current, and the withstand voltage value of the battery under different currents.

In an embodiment of the present application, the battery temperature is inversely proportional to the internal resistance of the battery, and the internal resistance of the battery is related to the floating pressure.

An embodiment of the present application further provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the program to implement the present invention. Apply for the above-mentioned charging control method of the mobile terminal.

In addition, the embodiment of the present application also proposes a non-transitory computer-readable storage medium on which a computer program is stored, and the program is executed by a processor for implementing the mobile terminal described in the foregoing embodiment of the present application. Charging control method.

It should be understood that each part of the present invention may be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods may be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it may be implemented using any one or a combination of the following techniques known in the art: Discrete logic circuits, application-specific integrated circuits with suitable combinational logic gate circuits, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

In the present invention, the terms "installation", "connected", "connected", and the like shall be understood in a broad sense unless otherwise specified and defined, for example, they may be fixed connections, detachable connections, or It can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements, unless it is clearly defined otherwise. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the description of this specification, the description with reference to the terms “one embodiment”, “some embodiments”, “examples”, “specific examples”, or “some examples” and the like means specific features described in conjunction with the embodiments or examples , Structure, material, or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, without any contradiction, those skilled in the art may combine and combine different embodiments or examples and features of the different embodiments or examples described in this specification.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present invention. Those skilled in the art can interpret the above within the scope of the present invention. Embodiments are subject to change, modification, substitution, and modification.

Claims

A charging control method for a mobile terminal, comprising:

Enter the constant current charging mode and obtain the current temperature and current of the battery of the mobile terminal;

Determining a corresponding floating pressure according to the current temperature of the battery and the current; and

Obtain a rated voltage of the battery, and charge the battery according to the floating voltage and the rated voltage.
The charging control method for a mobile terminal according to claim 1, wherein the charging the battery according to the floating pressure and the rated voltage comprises:

Generating a cutoff voltage according to the floating voltage and the rated voltage, and obtaining a corresponding cutoff current according to the cutoff voltage;

If the current voltage reaches the cut-off voltage, switch to a constant voltage charging mode;

If the current current reaches the cut-off current, charging is terminated.
The charging control method for a mobile terminal according to claim 1, wherein the determining a corresponding floating pressure according to a current temperature of the battery and the current current comprises:

Query a comparison table to obtain the corresponding floating pressure according to the current temperature of the battery and the current current, wherein the comparison table is obtained through experiments.
The charging control method for a mobile terminal according to claim 1, wherein the battery temperature is inversely proportional to the internal resistance of the battery, and the internal resistance of the battery is related to the floating pressure.
A charging control device for a mobile terminal, comprising:

An acquisition module, configured to acquire the current temperature and current of the battery of the mobile terminal when entering the constant current charging mode;

A determining module, configured to determine a corresponding floating pressure according to the current temperature of the battery and the current;

A control module configured to obtain a rated voltage of the battery and charge the battery according to the floating pressure and the rated voltage.
The charging control device for a mobile terminal according to claim 5, wherein the control module is specifically configured to:

Generating a cutoff voltage according to the floating voltage and the rated voltage, and obtaining a corresponding cutoff current according to the cutoff voltage;

If the current voltage reaches the cut-off voltage, switch to a constant voltage charging mode;

If the current current reaches the cut-off current, charging is terminated.
The charging control device for a mobile terminal according to claim 5, wherein the determining module is further configured to: query a comparison table to obtain a corresponding floating pressure according to the current temperature of the battery and the current current, wherein: The comparison table is obtained through experiments.
The charging control device for a mobile terminal according to claim 5, wherein the battery temperature is inversely proportional to the internal resistance of the battery, and the internal resistance of the battery is related to the floating pressure.
An electronic device, comprising: a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the program, the method according to claim 1 is implemented. The charging control method for a mobile terminal according to any one of -4.
A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that when the program is executed by a processor, the method for controlling a charging of a mobile terminal according to any one of claims 1-4 is implemented .