Multi-roller system and forming device of battery can

The present specification relates to a multi-roll system including two or more pairs of rolls, and a molding device for a battery can. The two or more pairs of rollers rotate around mutually independent rotating shafts, the height change of each roller is controlled, the cross sections of the two or more pairs of rollers have different shapes, and the two or more pairs of rollers approach the battery can at the same interval and press the battery can. 本说明书涉及包括两对以上的辊的多辊系统及电池罐的成型装置。上述两对以上的辊以彼此独立的旋转轴为基准旋转，分别控制高度变化，上述两对以上的辊的截面分别具备不同的形状，上述两对以上的各个辊隔着相同的间隔而靠近电池罐而施压。