Battery

Abstract

A battery comprising a current collecting plate (1), a cylindrical core (2), a pole (3), an insulating member (4) and a housing (5), wherein the current collecting plate (1) and the cylindrical core (2) are arranged in the housing (5), the cylindrical core (2) is connected to the current collecting plate (1), and the pole (3) is electrically connected to the cylindrical core (2) through the current collecting plate (1), characterized in that the current collecting plate (1) comprises a main body portion (11) and one or more welding portions (12), the welding portions (12) are bent relative to the main body portion (11), and the current collecting plate (1) is welded to the cylindrical core (2) through the welding portions (12), and the insulating member (4) comprises a first insulating member (41), and the first insulating member (41) is connected to the pole (3) and is arranged between the housing (5) and the current collector plate (1).