Method of Battery Balancing an Electrical Series String of Lithium-Ion Batteries, and System Thereof

A battery balancing method and system for charging multiple batteries connected together in an electrical series string with a single electrical charger. For example, the battery balancing method and system utilizes the battery management system (BMS) of the individual batteries for providing battery balancing of the multiple batteries connected together in the electrical series string when charging the series string with the single electrical charger.