Battery Case, Battery Case Shaping Apparatus, and Secondary Battery Manufacturing Method

An apparatus for shaping a battery case of a pouch-type secondary battery comprising:

• a die plate having an upper surface, a shaping portion, and a groove, wherein the upper surface is configured to receive a pouch film, wherein the shaping portion is recessed from the upper surface or passes through the upper surface, and wherein the groove is formed around a circumference of the shaping portion;
• a stripper configured to press and fix the pouch film, wherein the stripper has a punch hole and a rib the punch hole extending through an upper surface and a lower surfaces of the stripper at a position corresponding to the shaping portion, and wherein the rib extends along a circumference of the punch hole and faces the groove;
• and
• a punch configured to be inserted into the shaping portion of the die plate via the punch hole, so as to shape a cup portion in the pouch film.

A method for manufacturing a pouch-type secondary battery comprising:

• shaping a battery case so as to include a cup portion and an insulation failure-preventing portion;
• accommodating an electrode assembly in the cup portion and;
• scaling a scaling portion of the battery case,
• wherein the shaping of the battery case comprises:
• placing a pouch film on a die plate that has a shaping portion and a groove, wherein the groove extends along a circumference of the shaping portion;
• pressing and fixing the pouch film from above the die plate by a stripper that has a punch hole and a rib, wherein the rib extends along a circumference of the punch hole and is inserted into the groove to shape the insulation failure-preventing portion in the pouch film;
• and
• inserting a punch into the shaping portion of the die plate via the punch hole to shape the cup portion in the pouch film.