CONTROLLER FOR CONTROLLING CONVERTER CHARGING AND DISCHARGING BATTERY AND CHARGER AND DISCHARGER

Disclosed is a charger and discharger of a battery. The charger and discharger includes a converter, the converter including a transformer, a first switching circuit configured to form a current path between the power source unit and a primary side winding of the transformer during a first delivery period, and a second switching circuit configured to form a current path between the battery and a secondary side winding of the transformer during a second delivery period, and the first switching circuit has a dead time period in which the current path between the power source unit and the primary side winding is not formed, and the converter is operated to form a length of a portion where the dead time period and the second delivery period overlap each other when the battery is discharged to be shorter than the length of the portion when the battery is charged.