Molding Apparatus and Molding Method, Pouch-Type Battery Case Manufactured Thereby, and Secondary Battery Including the Same
AssigneeLG Energy Solution, Ltd.
InventorJi Hoon Lee
Life of this patent
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Abstract
A molding apparatus according to an embodiment of the present invention may mold a cup part in a pouch film. The molding apparatus includes: a die on which the pouch film is seated on a top surface thereof and in which a first space recessed from the top surface is defined; a stripper which is disposed above the die to fix the pouch film and in which a second space is defined at a position corresponding to the first space; and a pressing part configured to apply a pneumatic or hydraulic pressure to the pouch film so that a portion of the pouch film is elongated into the first space.
Claims24
A molding apparatus for molding a cup part in a pouch film, the molding apparatus comprising:
- a die on which the pouch film is seated on a top surface thereof and in which a first space recessed from the top surface is defined;
- a stripper which is disposed above the die to fix the pouch film and in which a second space is defined at a position corresponding to the first space;
- and
- a pressing part configured to apply a pneumatic or hydraulic pressure to the pouch film so that a portion of the pouch film is elongated into the first space.
A molding method for molding a cup part in a pouch film, the molding method comprising:
- a preparation process in which the pouch film is inserted between a die and a stripper;
- a fixing process in which the stripper fixes the pouch film;
- and
- a pressing process in which a pressing part applies a pneumatic or hydraulic pressure to the pouch film through a second space formed in the stripper so that a portion of the pouch film is elongated into a first space formed in the die.
A molding method for molding a cup part in a pouch film, the molding method comprising:
- a preparation process in which the pouch film is inserted between a die and a stripper;
- a fixing process in which the stripper fixes the pouch film;
- and
- a pressing process of applying a pneumatic or hydraulic pressure to the pouch film so that a portion of the pouch film is elongated into a first space formed in the die,
- wherein the pressing process comprises:
- a preliminary molding process in which a first flexible back disposed in a second space formed in the stripper elongates the pouch film into the first space;
- a primary molding process in which a second flexible bag is expanded into the first space to press a portion of the pouch film so that a portion of the pouch film is formed is convexly formed upward;
- and
- a secondary molding process in which internal pressures of the first flexible bag and the second flexible bag are adjusted to be the same so that a portion of the pouch film is flatly formed.
A pouch-type battery case comprising:
- a cup part having a recessed shape;
- and
- a terrace disposed on at least a portion of a circumference of the cup part,
- wherein the cup part comprises:
- a bottom surface;
- a plurality of circumferential surfaces configured to the bottom surface to the terrace;
- and
- a corner on which a pair of circumferential surfaces, which are adjacent to each other, among the plurality of circumferential surfaces and the bottom surface meet each other,
- wherein a thickness of the corner is 0.75 times to 0.85 times a thickness of the bottom surface.
A secondary battery comprising:
- an electrode assembly;
- and
- a pouch-type battery case comprising a cup part having a recessed shape and a terrace disposed on at least a portion of a circumference of the cup part,
- wherein the cup part comprises:
- a bottom surface;
- a plurality of circumferential surfaces configured to the bottom surface to the terrace;
- and
- a corner on which a pair of circumferential surfaces, which are adjacent to each other, among the plurality of circumferential surfaces and the bottom surface meet each other,
- wherein a thickness of the corner is 0.75 times to 0.85 times a thickness of a central portion of the bottom surface.
Dependencies are inferred from the claim text.