BATTERY CELL COMPRISING SEPARATOR OF DOUBLE STRUCTURE

摘要

The present invention relates to an electrode assembly of a structure that a plurality of unit cells are wound by a long sheet type separation film. The unit cells is made by a structure that at least one anode, at least one cathode, and a separator interposed between the anode and the cathode are arranged on top of each other. The separation film is formed by coating an inorganic coating layer on one surface or both sides of a polyolefine based porous base film wherein the width of the inorganic coating layer is narrower than the width of the porous base film in a vertical direction to a winding direction.