▎ 摘　　要

NOVELTY - The utility model claims a composite diaphragm for winding type battery and winding type battery, belonging to the technical field of battery. The utility model claims a composite diaphragm for winding type battery, comprising a diaphragm, one end of the diaphragm is bonded with an adhesive tape, the adhesive tape comprises a diaphragm bonding part, an isolation part orderly set along the length direction of the adhesive tape; a conductive bonding part; the diaphragm bonding part is bonded with one side of the corresponding end part of the diaphragm; the conductive bonding part is bonded with a conductive foil material; the conductive foil material is a metal foil material or graphite film or graphene film; the isolating part is used for bonding with the surface of the corresponding pole piece. The composite diaphragm for winding battery of the utility model is provided with a conductive foil at one end of the diaphragm; when preparing the coiled battery, the conductive foil material is located at the outermost layer of the electric core; the ion on the cathode sheet is prevented from reacting with the metal shell; the electrode material layer on the pole piece bonded with the protective layer is not easy to fall off; It is also convenient for locating the membrane and the conductive foil.