Abstract: A system and method for detecting a detective battery cell among a plurality of battery cells that form a battery. The system includes: a cell monitoring IC that measures a cell voltage of each of the battery cells, and a main control circuit that detects a charge battery cell of which a cell voltage first reaches a charge final voltage, detects a discharge battery cell of which a cell voltage first reaches a discharge final voltage among the plurality of battery cells, and when the number of charge cycles and the number of discharge cycles satisfies a first reference count, detects a battery cell for which the sum of times the battery cell is the charge battery cell and times the battery cell is the discharge battery cell meets or exceeds second count as the defective battery cell.

Abstract: A management method of a battery system includes determining whether a wireless communication failure occurs between a master battery management system (BMS) and at least one of a plurality of slave battery management systems (BMSs); receiving road condition information of where the vehicle equipped with the battery system is currently positioned if the wireless communication failure occurs; determining whether the vehicle is on the road based on the road condition information; setting a first failure confirmation time if the current position of the vehicle is on the road; setting a second failure confirmation time if the current position of the vehicle is not located on the road; and entering a safety mode if a wireless communication failure section from the time when the wireless communication failure occurs to the current time reaches the first failure confirmation time or the second failure confirmation time.

Abstract: Disclosed is a battery apparatus that measures a temperature of the battery apparatus, determines an estimated naturally-decreasing temperature based on information including a difference between the temperature of the battery apparatus and an atmospheric temperature in response to the temperature of the battery apparatus being higher than the atmospheric temperature, determine a stop temperature based on a reference temperature of the stop temperature and the estimated naturally-decreasing temperature, and stops a cooling operation of the battery apparatus in response to the temperature of the battery apparatus being lower than the stop temperature.