Battery module equalization apparatus and battery pack and vehicle including the same

A battery module equalization apparatus for charge equalization between a plurality of battery modules connected in series, each battery module including at least one secondary battery, the battery module equalization apparatus comprising:

• a plurality of slave controllers each electrically connected to the plurality of battery modules to measure voltage values of the plurality of battery modules, each slave controller having a slave charging/discharging channel through which the current that charges and discharges each battery module flows;
• and
• a master controller configured to:
• receive the voltage value of each battery module from the plurality of slave controllers,
• select at least one of the plurality of slave controllers based on the received voltage value, and
• transmit a CHARGE or DISCHARGE command to the at least one selected slave controller, and having a master charging/discharging channel through which the charging current supplied to the at least one slave controller and the discharging current supplied from the at least one slave controller flow.