Battery power amount calculation method and system

Abstract

A battery power amount calculation method comprises the following steps: inquiring a voltage power amount percentage table according to an open circuit voltage of the battery for obtaining a first power amount percentage of the battery, displaying the first power amount percentage on a set of display equipment, and eliminating the current value of a coulometer of the battery; reducing the numbers of inflow charges and outflow charges in the coulometer of the battery in a preset time period; calculating a difference between the number of inflow charges and outflow charges in the coulometer; converting the difference to micro-ampere hour; dividing the micro-ampere hour by rated capacity of the battery for acquiring an added / subtracted power amount percentage, and adding the first power amount percentage with the added / subtracted power amount percentage for obtaining a second power amount percentage; determining whether the average value of the current in the preset time period is smaller than a threshold value, when yes, returning and continuing inquiry, and otherwise, displaying the second power amount ratio. The invention further provides a battery power amount calculation system. The battery power amount of electronic equipment can be calculated through the battery power amount calculation method and the system.

Description

technical field [0001] The invention relates to a method and system for calculating battery power, in particular to a method and system for calculating battery power of electronic equipment. Background technique [0002] In consumer electronic devices such as tablet computers, mobile phones, multimedia players, and global positioning system (Global Positioning System, GPS) terminals, lithium batteries have been widely used due to their advantages such as high storage energy, long life, light weight, and no memory effect. use. In order for electronic devices to calculate and display battery power more accurately, there is generally a smarter Integrated Circuit (IC) chip in electronic devices. This IC chip supports the monitoring function of battery voltage and battery temperature, and also supports Coulomb counting calculations. In such a hardware environment, the calculation of the percentage of battery power generally adopts the voltage method (monitoring the open circuit...

AI Technical Summary

Problems solved by technology

[0003] When using the voltage method to calculate, due to the inertia problem caused by the rapid change of the battery voltage with the current, the battery power display will be extremely unstable. In a short period of time (such as 2 minutes), the battery power percentage fluctuates greatly. The difference is more than 10%, resulting in poor user experience, doubts about whether the battery is abnormal, etc.

The coulomb counting method will cause the internal resistance of the battery to increase due to the prolonged use of the battery, resulting in problems such as the battery’s power display being less than 100% or the electronic device shutting down in advance.

Both the voltage method and the coulomb counting method have certain defects, which will cause certain deviations in the process of calculating the battery power of electronic equipment

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