PARALLEL BATTERY SYSTEM AND METHOD OF PREDICTING REMAINING CHARGE TIME OF PARALLEL BATTERY SYSTEM

In a parallel battery system and a method of predicting a remaining charge time thereof to predict a residual time for charging a plurality of battery packs connected in parallel to a final target state of charge (SOC), a battery management system (BMS) estimates an SOC of each of the plurality of packs and assigns an ordering number in descending order, determines a connected pack group including n (n is a natural number) battery packs connected to a charge device with a closed relay, among the plurality of battery packs and an available pack group including m battery packs with an opened relay and not connected to the charging device, predicts a first remaining charge time required for the battery pack having the largest ordering number, among the n battery packs, to reach the final target SOC, calculates a second residual charge time by adding the m predicted remaining charge time for the m battery packs, and predicts a final remaining charge time by adding the first remaining charge time and second remaining charge time.