Cylindrical battery with built-in charging and discharging protection circuit

The utility model belongs to the technical field of rechargeable dry batteries, and particularly relates to a cylindrical battery with a built-in charge and discharge protection circuit, which comprises a metal shell with an opening at one end, a battery core roll core arranged in the metal shell, an anode cap and a rubber plug bracket arranged in the opening end of the metal shell, the protection circuit board is arranged in the outer surface of the rubber plug bracket and is positioned in the opening end of the metal shell; two battery cell pole columns arranged at the positive electrode end of the battery cell roll core penetrate through the rubber plug bracket and then are electrically connected with the protection circuit board; and the positive electrode cap is arranged on the outer surface of the protection circuit board. By adopting the structure, the battery core roll core, the protection circuit board and the rubber plug bracket can be packaged at one time through the metal shell, and the packaging