NICKEL-PLATED HEAT-TREATED STEEL SHEET FOR BATTERY CASE HAVING EXCELLENT CORROSION RESISTANCE AND MANUFACTURING METHOD THEREOF

The present disclosure relates to a nickel-plated heat-treated steel sheet for a battery case having excellent corrosion resistance and a manufacturing method thereof. In one embodiment, the nickel-plated heat-treated steel sheet comprises a base steel sheet; and a nickel layer formed on at least one surface of the base steel sheet; wherein the nickel layer is laminated in two or more layers, and a unit weight sequentially decreases from the base steel sheet toward a surface of the nickel layer.