Apparatus for cell balancing of battery pack and method thereof

The present invention relates to a battery cell balancing apparatus and method, the cell balancing system according to the present invention is a cell balancing apparatus for performing the balancing of the battery cell based on a switched capacitor (switched capacitor) circuit, and the interior of each battery cell unit calculating the resistance value to derive the resistance value; Capacitor capacitance calculation unit for deriving the internal capacitance of each battery cell; And a balancing control unit for generating control signals for controlling the switches of the switched-capacitor circuit to reflect the difference between the internal resistance value between the battery cell and the capacitor capacity. Through this, it is possible to increase the effect of the cell balance by taking into account the internal resistance and the internal capacitors of the battery cell to perform the cell balancing.