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Method and apparatus for measuring capacity of battery

A battery power estimation device technology, applied in the direction of measuring devices, measuring electrical variables, measuring electricity, etc., can solve problems such as up and down violent vibration, battery power display value error, etc., to achieve the effect of improving accuracy

Inactive Publication Date: 2016-07-13
UPI SEMICON CORP
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AI Technical Summary

Problems solved by technology

Please refer to figure 1 , in the flat region of the battery voltage (for example, the state of charge is between 30% and 80%), when using the voltage look-up table method to estimate the battery capacity, a slight error in voltage measurement will lead to serious changes in the battery power display value error
In addition, the estimation of battery power will cause the battery voltage and charge state graph to fluctuate violently up and down along with the discharge state of the battery.

Method used

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  • Method and apparatus for measuring capacity of battery
  • Method and apparatus for measuring capacity of battery

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Embodiment Construction

[0057] figure 2 It is a schematic circuit block diagram illustrating a battery capacity estimation device 200 according to an embodiment of the present invention. Please refer to figure 2The battery power estimation device 200 includes a battery state measurement module 210 , a coulomb counter 230 , a calculation module 250 , a power reporting module 270 and a weight table 290 .

[0058] According to different design requirements, the battery status measurement module 210 may include a battery voltage measurement module, a temperature measurement module, a current measurement module and / or other battery status sensing / measurement circuits. The battery status measurement module 210 is used for monitoring the battery status of the battery 20 , wherein the battery status includes one or a combination of a voltage value, a current value, and a temperature value. According to different design requirements, the temperature value includes an ambient temperature value and / or a tem...

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Abstract

A method and an apparatus for measuring a capacity of a battery are provided. The apparatus comprises a battery status measuring module, a coulometer, and a calculating module. The battery status measuring module is used for monitoring a battery status of a battery. The coulometer is used for measuring an output quantity of electricity of the battery to obtain a coulometer capacity. The calculating module is coupled to the battery status measuring module and the coulometer to receive the battery status and the coulometer capacity. The calculating module looks into a lookup table according to the battery status to obtain a measuring a capacity of the battery, dynamically determines a weight value according to the battery status, and adjusts the measuring capacity of the battery and the coulometer capacity to calculate a displaying capacity of the battery.

Description

technical field [0001] The present invention relates to a battery measurement, and in particular to a battery power estimation method and device. Background technique [0002] With the advancement of technology and the convenience it brings, people are increasingly unable to live or work without electronic devices (eg, mobile phones, tablets, personal computers, etc.). In addition, as the technology of various components in electronic devices (eg, processors, screens, communication components, cameras, etc.) improves, manufacturers need to increase battery capacity in electronic devices or reduce battery power consumption to increase battery life of electronic devices. The displayed value of the battery power will be an important indicator used by the user to evaluate the performance or usage level of the electronic device. [0003] Generally speaking, electronic devices usually use a voltage look-up table to estimate the battery capacity (power display value). figure 1 I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/3828G01R31/367G01R31/374
Inventor 邓国良庄志良
Owner UPI SEMICON CORP
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