Lithium battery management system balance control method

The invention provides a lithium battery balance control method. In the method, through collecting lithium battery monomer voltages, the over-charged (over-voltage) or large monomer differential pressure battery is identified and discharged so as to reach consistency of the batteries. A signal acquisition module, a system condition determination module, a balance determination module and a balance module are included in the invention. In the invention, through accurate monitoring and control of the lithium battery state, a lithium battery capacity can be effectively controlled to be consistent so that the lithium battery system can operate safely and reliably.