BATTERY SYSTEM AND MONITORING METHOD OF BATTERY SYSTEM

A battery system includes a battery module that includes one or more battery cells and can be charged and discharged, a battery module manager (BMM) that can monitor a state of the battery module and control the battery module, and a battery management system (BMS) that can receive a signal from the battery module manager and transmit a reset signal that controls the battery module manager to resume communication within the battery system based on the received signal.