DEVICE AND METHOD FOR CONTROLLING BATTERY

A device for controlling a battery, according to an embodiment of the present invention, controls a battery pack including a plurality of modules, each module including a plurality of cells connected in series, and may include: a selection circuit unit including one or more switches connected to a positive electrode of each cell and one or more switches connected to a negative electrode of each cell; a resonance circuit unit including one or more inductors and one or more capacitors and having one end connected to a first node and the other end connected to a second node; and a control unit that controls the plurality of switches in the selection circuit unit and one or more switches in the resonance circuit unit to measure the impedance of a selected cell among the plurality of cells or to perform charge equalization between the plurality of cells or charge equalization between the plurality of modules.