How to estimate battery capacity

Abstract

The present invention provides a method for estimating battery capacity. The estimating method is used in an electronic device having a battery. When a current or an average current of the battery is zero, according to a detected battery voltage, a A comparison reference capacity is queried in the look-up table. When the residual capacity of an existing record is greater than the reference capacity, the deduction procedure of the self-consumption capacity is performed for the residual capacity of the existing record for many times so that the residual capacity of the new record can be Less than the reference capacity, when the current of the battery is less than zero, the deduction procedure of the counted capacity of multiple discharges is performed for the existing recorded residual capacity until the battery is in a state of depletion to obtain a first compensation capacity. The recorded full charge capacity is deducted from the first compensation capacity to estimate a new full charge capacity.

Description

technical field [0001] The invention relates to a method for estimating, in particular to a method for estimating the residual capacity and full charge capacity of a battery. Background technique [0002] With the evolution of battery technology, a battery is installed in many electronic devices at present, so as to use the power stored in the battery to provide the energy required for the operation of the electronic device. Furthermore, the power stored in the battery will gradually decrease with the operation of the electronic device. In order to prevent the power stored in the battery from being completely exhausted and the electronic device to stop running without warning, the electronic device itself usually performs a check on the remaining capacity of the battery. estimate. By estimating the remaining capacity of the battery, the user of the electronic device can charge the battery when the power stored in the battery is insufficient. [0003] In the prior art, a lo...

AI Technical Summary

Problems solved by technology

Here, the battery voltage will change drastically within a certain period of time due to the charging and discharging of the battery, causing the battery capacity estimated by the voltage look-up table method to be inaccurate.

In addition, the battery will gradually produce physical aging with the time of use, and its power storage capacity will become worse and worse. However, the voltage look-up table method has no ability to predict the aging of the battery, resulting in the estimated battery capacity. will be less precise

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