Determining battery charge state involves forming weighted mean of unloaded battery charge state and integral of battery current over time to determine mean state of battery charge

摘要

The method involves determining a first state of battery charge based on a measurement of the unloaded battery voltage, determining a second state of battery charge based on integration of the battery current over time and forming the weighted mean of the two states of charge to determine the mean state of battery charge. Independent claims are also included for the following: an arrangement for implementing the method.