Abstract: A thin film battery includes: a cathode body; and an anode body which is laminated on at least one of an upper portion or a lower portion of the abode body, in which the cathode body includes: a cathode plate on which a cathode active material is applied; a pair of separators which covers an upper surface and a lower surface of the cathode plate; and a polymer insulating film unit interposed between the pair of separators and a portion of the polymer insulating film unit which protrudes outwardly from an edge of the separator is bonded to an anode plate of the anode body.

Abstract: A wrapping electrode assembly for use in a secondary battery manufactured by an electrode-stacking method includes: an electrode plate which has a coating layer of an electrode active material and a non-coated protruding portion, the electrode active material being capable of reversibly inserting and extracting lithium ions; first and second separator films which cover both surfaces of the electrode plate while exposing only the non-coated protruding portion; and an insulating polymer film which is positioned between the first separator film and the second separator film at least on a portion of a circumference of the electrode plate to be bonded to the first separator film and the second separator film, wherein the insulating polymer film is formed as being divided into at least two parts.

Abstract: A case for a secondary battery includes: a can which includes a lower plate and an upward side wall extended upwardly from the lower plate to form an inner space with an open top; and a cap which includes an upper plate and a downward side wall extended downwardly from the upper plate to form an inner space with an open bottom, and isolates the inner space of the can from the outside by inserting a lower end of the downward side wall into the inner space of the can so as to be mounted on an upper surface of the lower plate, wherein a reinforced connection unit in which a section of the downward side wall is wrapped with a section of the upward side wall is included in order to improve a connection force and a sealing property when the can and the cap are connected.

Abstract: A wrapping electrode assembly for use in a secondary battery manufactured by an electrode-stacking method includes: an electrode plate which has a coating layer of an electrode active material and a non-coated protruding portion, the electrode active material being capable of reversibly inserting and extracting lithium ions; first and second separator films which cover both surfaces of the electrode plate while exposing only the non-coated protruding portion; and an insulating polymer film which is positioned between the first separator film and the second separator film at least on a portion of a circumference of the electrode plate to be bonded to the first separator film and the second separator film, wherein the insulating polymer film is formed as being divided into at least two parts.

Abstract: A stacked type secondary battery of includes: an electrode assembly including multiple first electrode plates and multiple second electrode plates having the opposite polarity to that of the first electrode plates and stacked alternately with the first electrode plates with separators respectively interposed therebetween; an outer can in which an inner space for accommodating the electrode assembly is formed; an outer cap which is combined with the outer can so as to cover an open side of the outer can; and a conducting polymer film which is positioned between an outermost second electrode plate among the multiple second electrode plates and the outer cap to electrically connect the second electrode plate and the outer cap, or positioned between the outermost second electrode plate and the outer can to electrically connect the second electrode plate and the outer can.