Abstract
This paper shows an algorithm for prediction of remaining battery discharge time that can be applied to the lead-acid batteries installed in telecommunications power systems. In this method, the remaining battery discharge time can be predicted by deducting the integrated discharge electricity from the battery's available capacity, assuming battery is discharged according to the load current profile stored in memory. In this deduction, the amount of discharged electricity and the battery's available capacity are transformed into a value equivalent to the 10 hour-rated current discharge, using the coefficient clarified in this study. This prediction algorithm is examined by applying it to several load current profile and the results show the prediction accuracy to be within a range of 5%. The construction of this prediction equipment is also shown.
