Cylindrical secondary battery

Disclosed is a cylindrical secondary battery. The cylindrical secondary battery includes: an electrode assembly including a positive plate, a separator, and a negative plate; a cylindrical can accommodating the electrode assembly and electrically connected to the negative plate, the lower end of the cylindrical can being open; a crimp terminal passing through an upper surface of the cylindrical can and electrically connected to the positive plate; and a cap plate sealing the lower end of the cylindrical can, the cap plate having no electrical polarity. 公开了一种圆柱形二次电池。该圆柱形二次电池包括：电极组件，包括正极板、隔膜和负极板；圆柱形罐，容纳电极组件并且电连接到负极板，圆柱形罐的下端是敞开的；铆接端子，穿过圆柱形罐的上表面并且电连接到正极板；以及盖板，密封圆柱形罐的下端，盖板不具有电极性。