Battery management system with synchronized wake-up signal reception period and communication method thereof

A battery management system for a battery pack having a plurality of battery modules connected in series or parallel, the battery management system comprising:

• a master battery management system disposed in the battery pack and configured to transmit a wake-up signal to a plurality of slave battery management systems disposed respectively in the plurality of battery modules;
• and
• the plurality of slave battery management systems each configured to periodically check for the wake-up signal at a reception period and to transmit state information of a corresponding one of the plurality of battery modules to the master battery management system if the wake-up signal is received,
• wherein at least one first slave battery management system, among the plurality of slave battery management systems, is configured to transmit a request signal to the master battery management system at a start of the reception period of the at least one first slave battery management system to request the wake-up signal, and
• wherein, based on the request signal, a second slave battery management system among the plurality of slave battery management systems is configured to synchronize the reception period of the second slave battery management system to the reception period of the at least one first slave battery management system.