ALKALINE WATER ELECTROLYSIS DEVICE AND OPERATION METHOD THEREOF

Disclosed are an alkaline water electrolysis device and a driving method thereof. The alkaline water electrolysis device includes a water electrolytic stack, a voltage application unit, a voltage removing unit, and a controller. The water electrolytic stack includes a plurality of membrane-electrode assemblies (MEAs) and electrolyzes an aqueous alkaline solution to generate hydrogen and oxygen. The voltage applying unit outputs a voltage required for electrolysis to the water electrolytic stack. When the water electrolytic stack is in a no-load state, the voltage removing unit is electrically connected with the water electrolytic stack to consume and remove a residual voltage of the water electrolytic stack. The controller controls operations of the water electrolytic stack, the voltage application unit, and the voltage removing unit.