CELL BALANCING CURRENT CONTROL DEVICE AND METHOD, AND BATTERY PACK

A cell balancing current control device and method for a battery pack are capable of reflecting a resistance value depending on a length of a flat cable which connects each cell of a multi-series battery and a battery management system (BMS) (that is, cell to BMS connection) to control an on/off duty ratio of a switching module for applying a cell balancing current to be different for each individual cell, and a battery pack. Cell balancing current control is based on an on/off duty of a switching module calculated by reflecting the resistance value depending on the length of the flat cable.