BATTERY MANAGEMENT SYSTEM BATTERY PACK INCLUDING THE SAME AND METHOD FOR DETERIMING A FAILURE OF CURRENT DETECTING CIRCUIT

摘要

Disclosed are a battery management system for determining whether a current detection circuit is faulty, a battery pack including the same, and a fault determination method of a current detection circuit. According to an embodiment of the present invention, the battery management system comprises: a current detection circuit including a shunt resistor element installed on a high current path of a battery pack and configured to detect a reference current indicating a current flowing through the high current path; a bidirectional switch including a charging FET and a discharging FET connected in series and installed on the high current path; and a control unit coupled to the current detection circuit and the bidirectional switch to be able to operate. The control unit detects a first voltage generated at both ends of the charging FET and a second voltage generated at both ends of the discharging FET while a first high level voltage is applied to a gate of the charging FET and a second high level voltage is applied to a gate of the discharging FET. Also, the control unit is configured to determine whether the current detection circuit is faulty based on at least one of the first voltage and the second voltage and the reference current.