CN106772092B - Charging current setting system and method for obtaining battery voltage based on mobile terminal - Google Patents
Charging current setting system and method for obtaining battery voltage based on mobile terminal Download PDFInfo
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- CN106772092B CN106772092B CN201710000953.1A CN201710000953A CN106772092B CN 106772092 B CN106772092 B CN 106772092B CN 201710000953 A CN201710000953 A CN 201710000953A CN 106772092 B CN106772092 B CN 106772092B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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Abstract
The invention discloses a charging current setting system and a charging current setting method for acquiring battery voltage based on a mobile terminal, wherein the method comprises the steps of detecting whether the mobile terminal is connected with a charging power supply, and if so, recording the set charging current as I1; when an instruction of accurately acquiring the voltage of the battery is received, acquiring the current I2 currently charged into the battery, and setting the charging current to be I1-I2; the battery voltage V1 is read and the charging current is then set to I1. The battery voltage is obtained when the current charged into the battery is zero, so that the actual voltage of the battery can be accurately obtained, the actual electric quantity of the battery is further obtained and displayed to a user, the user can know the electric quantity of the battery, the battery can be fully charged when the terminal is charged, and the battery is charged more stably and accurately.
Description
Technical Field
The invention relates to the field of mobile terminals, in particular to a charging current setting system and method for acquiring battery voltage based on a mobile terminal.
Background
In recent years, intelligent terminals such as mobile phones have been developed rapidly, and almost reach the state of one hand. Because the development of the intelligent terminal is developing more intelligently and largely, a Central Processing Unit (CPU) of the intelligent terminal is required to have a faster processing speed, so that the power consumption of the intelligent terminal is relatively high.
When the intelligent terminal is charged, the real-time electric quantity information of the battery is often required to be displayed, so that the intelligent terminal judges whether the battery needs to be continuously charged or not, and feeds back the real electric quantity of the battery to a user. In the existing method for calculating the battery capacity of the mobile terminal, generally, after the battery voltage is obtained, the battery capacity is calculated according to the corresponding relation between the battery voltage and the battery capacity obtained through a test in advance, and the battery capacity is displayed to a user.
In the prior art, the battery voltage is directly obtained through an Analog-to-Digital Converter (ADC) on a Power Manager IC (PMIC).
That is, in the prior art, because internal resistance exists inside the battery, the voltage of the battery obtained during charging is higher, which results in higher battery power. Therefore, the problem of abnormal electricity display of the conventional mobile terminal is generally existed in daily use.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The present invention provides a charging current setting system and method for acquiring a battery voltage based on a mobile terminal, aiming at the above-mentioned defects in the prior art. The charging current setting method for obtaining the battery voltage is provided, the voltage of the battery can be accurately obtained through the control of the charging current when the battery is charged, the real electric quantity of the battery is further obtained, and convenience is brought to a user.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a charging current setting system for acquiring a battery voltage based on a mobile terminal, comprising: the charging interface, the main controller and the battery are connected in sequence;
the charging interface comprises a VBUS interface and a ground interface which are used for being connected with a charger;
the main controller comprises a connection detection module, a charging current acquisition and storage module, a battery charging current acquisition module, a charging current setting module and a battery voltage acquisition module;
the connection detection module is connected with the VBUS end of the charging interface and used for detecting whether the VBUS end of the charging interface is at a high level or not, and when the VBUS end of the charging interface is at the high level, the mobile terminal is connected with the charger;
the charging current obtaining and storing module is connected with a VBUS end of the charging interface and used for obtaining a first current value I1 charged into the mobile terminal from the charger on the VBUS and storing the first current value I1;
the battery charging current acquisition module is connected with the charging current acquisition and storage module and is used for acquiring a second current value I2 of the battery;
the battery voltage acquisition module is connected with the battery charging current acquisition module, is connected with the battery and is used for acquiring the voltage of the battery;
the charging current setting module is respectively connected with the battery charging current obtaining module and the charging current obtaining and storing module and is used for setting the charging current.
The charging current setting system based on the battery voltage obtained by the mobile terminal is characterized in that the connection detection module is further used for judging whether to be connected with the charger by detecting whether the VBUS end is at a high level.
The charging current setting system for acquiring the battery voltage based on the mobile terminal, wherein the charging current setting module comprises:
a first charging current setting unit for setting the charging current to a first current value I1, a second current value I2 and then obtaining the battery voltage;
and a second charging current setting unit for setting the charging current to the first current value I1 after the battery voltage acquisition is completed.
A charging current setting method of the charging current setting system for obtaining the battery voltage based on the mobile terminal as described in any one of the above, comprising the steps of:
A. detecting whether the mobile terminal is connected with a charging power supply, and if so, recording the set charging current as a first current value I1;
B. when an instruction of accurately acquiring the voltage of the battery is received, acquiring a second current value I2 of the currently charged battery, setting the charging current as a first current value I1 and a second current value I2, and then acquiring the voltage of the battery;
C. the battery voltage V1 is read, and the charging current is set to the first current value I1 after the battery voltage is acquired.
The charging current setting method based on the battery voltage obtained by the mobile terminal is characterized in that the step A comprises the following steps:
a1, detecting whether the VBUS end of the charging interface is at a high level;
a2, when the VBUS end of the charging interface is at a high level, judging that the mobile terminal is connected to a charging power supply, and recording the set charging current as a first current value I1.
The charging current setting method based on the battery voltage obtained by the mobile terminal is characterized in that the high level is 5V.
The charging current setting method based on the battery voltage obtained by the mobile terminal, wherein the step B comprises the following steps:
b1, when an instruction of accurately acquiring the battery voltage is received, acquiring the current I2 currently charged into the battery;
b2, setting the charging current to be a first current value I1 and a second current value I2 and then acquiring the battery voltage;
b3, reading the battery voltage V1, and setting the charging current as a first current value I1 after the battery voltage is acquired.
The charging current setting method based on the mobile terminal to obtain the battery voltage is characterized in that the first current value I1 is a first current value I1 which is obtained by obtaining voltages V1 and V2 at two ends of a charging current obtaining and storing module internal resistor R1 and calculating from (V2-V1)/R1.
The charging current setting method for acquiring the battery voltage based on the mobile terminal is characterized in that the second current value I2 is obtained by acquiring voltages V3 and V4 at two ends of an internal resistor R2 of a charging battery current acquisition module, and calculating a second current value I2 of the charging battery according to (V4-V3)/R2.
The charging current setting method for obtaining the battery voltage based on the mobile terminal is characterized in that the resistance value of the resistor R1 is 10 milliohms; the resistance of the resistor R2 is 10 milliohms.
The charging current setting system and method for acquiring the battery voltage based on the mobile terminal provided by the invention have the advantages that whether the mobile terminal is connected with a charging power supply or not is detected, and if so, the set charging current is recorded as I1; when an instruction of accurately acquiring the voltage of the battery is received, acquiring the current I2 currently charged into the battery, and setting the charging current to be I1-I2; the battery voltage V1 is read and the charging current is then set to I1. The battery voltage is obtained when the current charged into the battery is zero, so that the actual voltage of the battery can be accurately obtained, the actual electric quantity of the battery is further obtained and displayed to a user, the user can know the electric quantity of the battery, the battery can be fully charged when the terminal is charged, and the battery is charged more stably and accurately.
Drawings
Fig. 1 is a schematic view of the internal structure of a battery according to the present invention.
Fig. 2 is a functional block diagram of a charging current setting system according to a preferred embodiment of the present invention.
Fig. 3 is a functional block diagram of a charging current obtaining and storing module according to a preferred embodiment of the charging current setting system for obtaining a battery voltage based on a mobile terminal of the present invention.
Fig. 4 is a functional block diagram of a charging current obtaining module according to a preferred embodiment of the charging current setting system for obtaining a battery voltage based on a mobile terminal of the present invention.
Fig. 5 is a flowchart of a charging current setting method of the charging current setting system based on the mobile terminal obtaining the battery voltage according to the preferred embodiment of the present invention.
Detailed Description
As shown in fig. 1, when the battery is in a charging state, current flows from the positive electrode of the battery, and at this time, the voltage across the battery can be obtained by the following calculation formula:
Vadc = Ibat×Rbat +Vbat
in the above formula: vadc is the voltage across the battery; ibat is the charging current of the battery; rbat is the internal resistance of the battery; vbat is the voltage across the battery internal charge storage region.
It can be seen from the above formula that when the battery is charged, i.e. Ibat is greater than 0, the voltage Vadc across the battery is high due to the virtual high phenomenon, and the voltage of the battery read by the power management chip through the analog-to-digital converter is higher, and only when Ibat is equal to 0, Vadc is equal to Vbat.
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2, fig. 2 is a functional block diagram of a charging current setting system for acquiring a battery voltage based on a mobile terminal according to the present invention, and as shown in fig. 2, the charging current setting system for acquiring a battery voltage based on a mobile terminal according to the present invention includes: the charging interface, the main controller and the battery; the charging interface and the battery are respectively connected with the main controller;
the charging interface comprises a VBUS interface and a ground interface which are used for being connected with a charger;
the main controller comprises a connection detection module, a charging current acquisition and storage module, a battery charging current acquisition module, a charging current setting module and a battery voltage acquisition module;
the connection detection module is connected with the VBUS end of the charging interface and used for detecting whether the VBUS end of the charging interface is at a high level or not, and when the VBUS end of the charging interface is at the high level, the mobile terminal is connected with the charger; specifically, since the charger outputs a voltage of 5V, the VBUS terminal will also become a voltage of 5V when the charger is connected to the charging interface, and therefore the main controller can determine whether to connect to the charger by detecting whether the VBUS terminal is at a high level.
The charging current obtaining and storing module is connected with a VBUS end of the charging interface and used for obtaining a first current value I1 charged into the mobile terminal from the charger on the VBUS and storing the first current value I1; as shown in fig. 3, which is a schematic diagram of the charging current obtaining and storing module, the value of the current I1 charged from the charger to the mobile terminal is calculated from (V2-V1)/R1 by obtaining the voltages V1 and V2 at two ends of the resistor R1; preferably, the resistor R1 has a resistance of 10 milliohms.
The battery charging current acquisition module is connected with the charging current acquisition and storage module and is used for acquiring a second current value I2 of the battery; as shown in fig. 4, which is a schematic diagram of the battery charging current obtaining module, the battery charging current value I2 is calculated from (V4-V3)/R2 by obtaining voltages V3 and V4 at two ends of a resistor R2; preferably, the resistor R2 has a resistance of 10 milliohms.
The battery voltage acquisition module is connected with the battery charging current acquisition module, is connected with the battery and is used for acquiring the voltage of the battery;
the charging current setting module is respectively connected with the battery charging current obtaining module and the charging current obtaining and storing module and is used for setting the charging current, and specifically comprises two current settings, wherein the first current setting is to set the charging current to be I1-I2 and then obtain the battery voltage, and the second current setting is to set the charging current to be I1 after the battery voltage is obtained.
Namely, the charging current setting module includes:
a first charging current setting unit for setting the charging current to a first current value I1, a second current value I2 and then obtaining the battery voltage;
and a second charging current setting unit for setting the charging current to the first current value I1 after the battery voltage acquisition is completed.
The working principle of the charging current setting system for acquiring the battery voltage based on the mobile terminal is as follows: detecting whether the mobile terminal is connected with a charging power supply, and if so, recording the set charging current as a first current value I1; when an instruction of accurately acquiring the voltage of the battery is received, acquiring a second current value I2 of the currently charged battery, setting the charging current as a first current value I1 and a second current value I2, and then acquiring the voltage of the battery; when the battery voltage V1 is read, the charging current is set to the first current value I1 after the battery voltage acquisition is completed.
Specifically, in the embodiment of the present invention, when the charging current is set to the first current value I1 and the second current value I2, the current charged into the mobile terminal by the charger is exactly equal to the current consumed by the current mobile terminal, and the current charged into the battery is zero at this time, when looking at fig. 1, the formula Vadc = Ibat × Rbat + Vbat is zero at this time, and therefore Vadc (i.e., V1) is equal to Vbat.
The method comprises the steps of detecting whether the mobile terminal is connected with a charging power supply or not by detecting whether a VBUS end of a charging interface is at a high level (for example, 5V) or not; and when the VBUS end of the charging interface is at a high level, whether the mobile terminal is connected with a charging power supply or not is judged, and the set charging current is recorded as a first current value I1.
It can be seen that the above embodiments of the present invention provide a charging current setting system for acquiring a battery voltage based on a mobile terminal, by detecting whether the mobile terminal is connected to a charging power supply, if yes, the set charging current is recorded as I1; when an instruction of accurately acquiring the voltage of the battery is received, acquiring the current I2 currently charged into the battery, and setting the charging current to be I1-I2; the battery voltage V1 is read and the charging current is then set to I1. The battery voltage is obtained when the current charged into the battery is zero, so that the actual voltage of the battery can be accurately obtained, the actual electric quantity of the battery is further obtained and displayed to a user, the user can know the electric quantity of the battery, the battery can be fully charged when the terminal is charged, and the battery is charged more stably and accurately.
Referring to fig. 5, fig. 5 is a flowchart illustrating a charging current setting method of the charging current setting system according to the present invention, wherein the charging current setting method is based on the charging current setting system for obtaining the battery voltage from the mobile terminal. As shown in fig. 5, the charging current setting method of the charging current setting system based on the mobile terminal obtaining the battery voltage includes the following steps:
step S100, detecting whether the mobile terminal is connected to a charging power supply, and if so, recording the set charging current as a first current value I1;
specifically, step S100 includes:
s11, detecting whether the VBUS end of the charging interface is at a high level;
and S12, when the VBUS end of the charging interface is at a high level, recording that the set charging current is I1.
Step S200, when an instruction of accurately acquiring the battery voltage is received, acquiring a second current value I2 currently charged into the battery, and setting the charging current as a first current value I1 and a second current value I2;
specifically, step S200 includes:
s21, when an instruction of accurately obtaining the battery voltage is received, obtaining the current I2 of the currently charged battery;
s22, setting the charging current as a first current value I1 and a second current value I2;
in step S300, the battery voltage V1 is read, and then the charging current is set to the first current value I1.
Specifically, when the charging current is set to the first current value I1 and the second current value I2, the current charged into the mobile terminal by the charger is exactly equal to the current consumed by the current mobile terminal, and the current charged into the battery is zero at this time, and when the formula Vadc = Ibat × Rbat + Vbat in the background art is shown in fig. 1, Ibat is zero at this time, and therefore Vadc (i.e., V1 in step S300) is equal to Vbat.
In the embodiment of the invention, the first current value I1 is the first current value I1 charged from the charger to the mobile terminal calculated by (V2-V1)/R1 through acquiring the voltages V1 and V2 at two ends of the internal resistor R1 of the charging current acquisition and storage module. The resistance of the resistor R1 is 10 milliohms.
The second current value I2 is obtained by obtaining voltages V3 and V4 at two ends of a battery charging current obtaining module internal resistor R2, and calculating a second current value I2 charged in the battery from (V4-V3)/R2. The resistance of the resistor R2 is 10 milliohms.
In summary, in the charging current setting system and method for acquiring the battery voltage based on the mobile terminal provided by the invention, whether the mobile terminal is connected to the charging power supply is detected, and if yes, the set charging current is recorded as I1; when an instruction of accurately acquiring the voltage of the battery is received, acquiring the current I2 currently charged into the battery, and setting the charging current to be I1-I2; the battery voltage V1 is read and the charging current is then set to I1. The battery voltage is obtained when the current charged into the battery is zero, so that the actual voltage of the battery can be accurately obtained, the actual electric quantity of the battery is further obtained and displayed to a user, the user can know the electric quantity of the battery, the battery can be fully charged when the terminal is charged, and the battery is charged more stably and accurately.
Of course, it will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program instructing relevant hardware (such as a processor, a controller, etc.), and the program may be stored in a computer readable storage medium, and when executed, the program may include the processes of the above method embodiments. The storage medium may be a memory, a magnetic disk, an optical disk, etc.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (6)
1. A charging current setting system for acquiring battery voltage based on a mobile terminal, comprising: the charging interface, the main controller and the battery are connected in sequence;
the charging interface comprises a VBUS interface and a ground interface which are used for being connected with the charger;
the main controller comprises a connection detection module, a charging current acquisition and storage module, a battery charging current acquisition module, a charging current setting module and a battery voltage acquisition module;
the connection detection module is connected with the VBUS end of the charging interface and used for detecting whether the VBUS end of the charging interface is at a high level or not, and when the VBUS end of the charging interface is at the high level, the mobile terminal is connected with the charger;
the charging current obtaining and storing module is connected with a VBUS end of the charging interface and used for obtaining a first current value I1 charged into the mobile terminal from the charger on the VBUS and storing the first current value I1;
the battery charging current acquisition module is connected with the charging current acquisition and storage module and is used for acquiring a second current value I2 of the battery;
the battery voltage acquisition module is connected with the battery charging current acquisition module, is connected with the battery and is used for acquiring the voltage of the battery;
the charging current setting module is respectively connected with the battery charging current acquisition module and the charging current acquisition and storage module and is used for setting charging current;
the charging current setting module includes:
a first charging current setting unit for setting a charging current to I1-I2 and then acquiring a battery voltage;
the second charging current setting unit is used for setting the charging current to be the first current value I1 after the battery voltage is acquired;
the first current value I1 is obtained by obtaining voltages V1 and V2 at two ends of a charging current obtaining and storing module internal resistor R1, and a first current value I1 charged into the mobile terminal from a charger is calculated by (V2-V1)/R1;
the second current value I2 is obtained by obtaining voltages V3 and V4 at two ends of a battery charging current obtaining module internal resistor R2, and calculating a second current value I2 charged in the battery from (V4-V3)/R2.
2. The system as claimed in claim 1, wherein the connection detecting module is further configured to determine whether to connect to the charger by detecting whether the VBUS terminal is high.
3. A charging current setting method of a charging current setting system for acquiring a battery voltage based on a mobile terminal according to any one of claims 1-2, comprising the steps of:
A. detecting whether the mobile terminal is connected with a charging power supply, and if so, recording the set charging current as a first current value I1;
B. when an instruction of accurately acquiring the voltage of the battery is received, acquiring a second current value I2 of the currently charged battery, setting the charging current to be I1-I2 and then acquiring the voltage of the battery;
C. the battery voltage V1 is read, and the charging current is set to the first current value I1 after the battery voltage is acquired.
4. The charging current setting method according to claim 3, wherein the step A includes:
a1, detecting whether the VBUS end of the charging interface is at a high level;
a2, when the VBUS end of the charging interface is at a high level, judging that the mobile terminal is connected to a charging power supply, and recording the set charging current as a first current value I1.
5. The charging current setting method according to claim 4, wherein the high level is 5V.
6. The charging current setting method according to claim 4, wherein the resistance value of the resistor R1 is 10 milliohms; the resistance of the resistor R2 is 10 milliohms.
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| CN107681716A (en) * | 2017-09-28 | 2018-02-09 | 惠州Tcl移动通信有限公司 | The charging device and method and storage medium that battery of mobile terminal voltage is set |
| CN112701758B (en) * | 2021-01-13 | 2023-12-26 | 国网甘肃省电力公司张掖供电公司 | Charging current setting method, system and mobile terminal |
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| CN103616551A (en) * | 2013-12-10 | 2014-03-05 | Tcl通讯（宁波）有限公司 | Terminal capable of accurately obtaining battery voltage in charging process and battery voltage obtaining method |
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| CN103166289A (en) * | 2013-03-21 | 2013-06-19 | Tcl通讯（宁波）有限公司 | Mobile terminal and method for detecting battery voltage in charging |
| CN103269106A (en) * | 2013-05-31 | 2013-08-28 | Tcl通讯（宁波）有限公司 | Charging method for setting charging current automatically and mobile terminal |
| CN103616551A (en) * | 2013-12-10 | 2014-03-05 | Tcl通讯（宁波）有限公司 | Terminal capable of accurately obtaining battery voltage in charging process and battery voltage obtaining method |
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