Estimation method and terminal device of electricity quantity of battery

Abstract

The invention relates to terminal devices and discloses an estimation method a terminal device of the electricity quantity of a battery. According to the invention, a sampling battery voltage is firstly compensated and then substituted into a corresponding relationship table of battery voltage and battery electricity quantity to obtain a corresponding battery electricity quantity for displaying, wherein the corresponding relationship table of the battery voltage and the battery electricity quantity is obtained according to a battery discharging curve graph. The voltage reduction of a high-power-consumption load, which is caused by a large discharging quantity, is compensated to enable the compensated voltage of the load to match with the voltage in a standard discharging curve, so that the problem that electricity quantity display errors are large in the voltage detection method can be avoided, and the working and stand-by time of the system can be prolonged. Besides, the estimation method of the electricity quantity of the battery is still based on the principle of the voltage detection method and does not need the current detection, so that the technical scheme can be achieved without increasing the hardware cost, namely, the hardware cost is low.

Description

technical field [0001] The present invention relates to terminal equipment, in particular to battery power estimation technology in terminal equipment. Background technique [0002] For battery-powered systems today, the biggest challenge is battery run time. Usually, electronic system designers focus on improving DC (direct current) / DC power conversion efficiency, reducing system power consumption and expanding battery capacity, so as to prolong the running time of the battery, but often ignore the relationship between power conversion efficiency and battery Capacity is equally important as the accuracy of the battery gas gauge. If the battery gas gauge has a margin of error of ±10%, then the equivalent of 10% of battery capacity or runtime is lost. Accurate fuel gauging enables handheld devices to fully utilize their batteries, extending system operating and standby times and improving customer satisfaction. [0003] In some mobile phones, the accuracy of the battery po...

AI Technical Summary

Problems solved by technology

[0009] Considering factors such as detection cost and PCB (printed circuit board) area, solutions (2) and (3) are rarely used in the field of mobile phones, and the voltage detection method is mainly used to estimate the battery power

The main disadvantage of the current voltage detection method is that the error of the power display is relatively large, especially the influence of the power consumption current is more serious.

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