Battery management systems and methods

摘要

A battery management system (100) includes a switch array (130), a first controller (140) and a second controller (150). The switch array (130) selects a battery module from multiple battery modules in a battery pack (110) based upon a conduction state of the switch array (130). The first controller (140) is coupled to the switch array (130) and receives measurement information of cells in the battery pack (110) through the switch array (130). The second controller (150) is coupled to the switch array (130) and the first controller (140) and provides a control signal to control the conduction state of the switch array (130). The first controller (140) further controls a balance circuit (120) coupled to the battery pack (110) to balance a selected battery module if the selected battery module is identified as an unbalanced battery module based upon measurement information associated with the selected battery module.