Method for measuring and calculating system battery electricity quantity

Abstract

The invention discloses a method for measuring and calculating system battery electricity quantity. The method comprises the following steps that: step one, a reference voltage of a battery is obtained by using an ADC battery voltage measurement method, and preferably, 10 times of successive AD conversion is performed, an average value of conversion results is selected, such that the reference voltage can be obtained; step two, the compensation voltage of each main power consumption device is calculated according to the states of the main power consumption devices of a system; step three, the sum of the reference voltage and the compensation voltage of the main power consumption devices is calculated and is adopted as post-compensation voltage; step four, corresponding electricity quantity is obtained through a voltage-electricity quantity relationship according to the post-compensation voltage, and the corresponding electricity quantity is adopted as measured electricity quantity; and step five, currently displayed electricity quantity of the battery is updated with the measured electricity quantity of the battery. With the method for measuring and calculating the system battery electricity quantity of the invention adopted, under the premise that current information is unavailable, a method in which ADC voltage is adopted to measure the electricity quantity of the battery is only utilized, and the method and algorithms are improved, and therefore, measurement accuracy is greatly increased, and the charge and discharge curves of the battery are more approximate to authentic situations.

Description

technical field [0001] The invention relates to a computer automatic measurement method, in particular to a method for measuring and calculating battery power. Background technique [0002] In devices using batteries such as tablet computers and mobile phones, it is generally necessary to display the current battery power. For occasions that require high measurement accuracy, special chips such as coulomb counters are generally used. The coulomb counter can accurately calculate the energy stored and consumed by the battery by measuring the voltage and charge / discharge current of the battery, so as to obtain the current battery power. [0003] In order to save costs, for consumer electronics products that do not require very high precision, such dedicated fuel gauge chips are usually not used, but the battery voltage is measured and calculated by only using the ADC to measure and calculate the battery power. The principle of this method is that the output voltage of the bat...

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Problems solved by technology

[0008] The present invention mainly solves the problems of large deviation of battery charge and large fluctuation of battery charge and discharge curves when using only voltage mode to measure battery power online under the limitation of no current measurement function.

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