The cell balance device

PROBLEM TO BE SOLVED: To provide an active type cell balance device that can suppress variations in characteristics between taps due to an increase in the number of battery cells which assembled batteries have.SOLUTION: In the active type cell balance device, a plurality of primary coils which are connected in series to each other are connected in parallel to the assembled batteries. Furthermore, secondary coils are connected in parallel to each battery cell which constitutes the assembled battery. In addition, a switching circuit is connected in series to the plurality of primary coils. The plurality of primary coils are connected through a transformer to the plurality of secondary coils which are connected to at least two or more battery cells out of each of the plurality of battery cells.