Cylindrical secondary battery

Disclosed is a cylindrical secondary battery. The cylindrical secondary battery includes: an electrode assembly including a positive electrode plate, a separator, and a negative electrode plate; a cylindrical can accommodating the electrode assembly, a lower end of the cylindrical can being electrically connected to the negative electrode plate; a terminal passing through a top surface of the cylindrical can and electrically connected to the positive electrode plate; and a cap plate coupled at a lower end of the cylindrical can. The cover plate is sealed to the lower end of the cylindrical can by welding. 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，包括正电极板、隔膜和负电极板；圆柱形罐，容纳电极组件，圆柱形罐的下端电连接到负电极板；端子，穿过圆柱形罐的顶表面并且电连接到正电极板；以及盖板，结合在圆柱形罐的下端处。盖板通过焊接密封到圆柱形罐的下端。