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System and method for setting charging current based on battery voltage obtained by mobile terminal

A technology of charging current and battery voltage, applied in the field of charging current setting system, can solve the problems of high battery power and abnormal power display, and achieve the effect of stable charging

Active Publication Date: 2020-11-13
HUIZHOU TCL MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] That is to say, in the prior art, due to the internal resistance inside the battery, the battery voltage obtained during charging is relatively high, which will lead to the obtained battery power is also relatively high
Therefore, when the existing mobile terminals are used in daily life, the problem of abnormal power display is common.

Method used

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  • System and method for setting charging current based on battery voltage obtained by mobile terminal
  • System and method for setting charging current based on battery voltage obtained by mobile terminal
  • System and method for setting charging current based on battery voltage obtained by mobile terminal

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Embodiment Construction

[0042] The charging current setting system and method based on the mobile terminal obtaining the battery voltage provided by the present invention, such as figure 1 As shown, when the battery is in the charging state, the current flows in from the positive pole of the battery, and the voltage at both ends of the battery can be obtained by the following formula:

[0043] Vadc = Ibat×Rbat +Vbat

[0044] In the above formula: Vadc is the voltage at both ends of the battery; Ibat is the charging current of the battery; Rbat is the internal resistance of the battery; Vbat is the voltage at both ends of the internal power storage area of ​​the battery.

[0045] It can be seen from the above formula that when the battery is charging, that is, Ibat is greater than 0, the voltage Vadc at both ends of the battery is falsely high, so that the battery voltage read by the power management chip through the analog-to-digital converter is too high. Only when Ibat is equal to 0, Vadc is equal...

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Abstract

The invention discloses a charging current setting system and a charging current setting method for acquiring a cell voltage based on a mobile terminal. The method comprises the following steps: detecting whether the mobile terminal accesses a charging power supply, and if so, recording a set charging current as I1; when an instruction for precisely acquiring the cell voltage is received, accruing a current I2 currently charged into a cell, and setting the charging current as I1-I2; and reading a cell voltage V1, and then setting the charging current as I1. When the current charged into the cell is zero, the cell voltage is acquired, so that the actual voltage of the cell can be precisely acquired, the real electric quantity of the cell is obtained and is displayed to a user, and the user can know the electric quantity of the cell; and when the terminal is charged, the cell can be fully charged, so that the charging of the cell is relatively stable and precise.

Description

technical field [0001] The present invention relates to the field of mobile terminals, in particular to a charging current setting system and method based on the mobile terminal acquiring battery voltage. Background technique [0002] In recent years, smart terminals such as mobile phones have developed rapidly, and have basically reached the state of one in everyone's hands. Since the development of smart terminals is moving towards smarter and larger screens, the CPU (central processing unit, central processing unit) of smart terminals needs to be faster in processing speed, so that it consumes more power. Existing smart terminals generally use large-capacity battery, so as to improve the battery life of the smart terminal. [0003] When the smart terminal is charging, it is often necessary to display the real-time power information of the battery, so that the smart terminal can judge whether it needs to continue charging, and feedback the real power of the battery to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/3835H02J7/00
CPCG01R31/382H02J7/007
Inventor 俞斌杨维琴
Owner HUIZHOU TCL MOBILE COMM CO LTD
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