Battery management device and battery balancing method thereby

A battery balancing method to be performed by a battery management apparatus for managing a plurality of batteries, the method comprising:

• collecting state information including charge state values of the plurality of batteries;
• determining whether a charge state value of at least one battery of the plurality of batteries falls within low charge state range or a high charge state range;
• determining whether a balancing initiation condition defined in correspondence with a current charge state range among the low charge state range and a high charge state range is satisfied based on the state information of the plurality of batteries;
• and
• determining whether to initiate a balancing mode for balancing the plurality of batteries based on a determination result to determine whether the balancing initiation condition is satisfied.

A battery system comprising:

• a plurality of batteries;
• and
• a battery management apparatus configured to collect state information of the plurality of batteries and to manage and control the plurality of batteries based on the collected state information,
• wherein the battery management apparatus is configured to determine whether a charge state value of at least one battery of the plurality of batteries falls within a predetermined low charge state range or a high charge state range, to determine whether a balancing initiation condition defined in correspondence with a current charge state range is satisfied based on the state information of the plurality of batteries, and to determine whether to initiate a balancing mode for balancing the plurality of batteries based on a determination result to determine whether the balancing initiation condition is satisfied.