Abstract: A pouch-type battery case includes a cup portion, which accommodates therein an electrode assembly formed by stacking an electrode and a separator, and a plurality of die edges connecting an outer wall of the cup portion to a side extending from the outer wall. The die edges include a first region, which is rounded at a first radius (r1) of curvature and at which an electrode tab extending from the electrode is positioned, and a second region which is other than the first region and rounded at one or more second radii (r2, r3, r4) of curvature less than or equal to the first radius (r1) of curvature. The second region is divided into an inner region and an outer region with respect to the first region, and the radius (r2) of curvature in the inner region differs from the radii (r3, r4) of curvature in the outer region.

Abstract: A pouch-type battery case according to an embodiment of the present invention can—include a cup part configured to accommodate an electrode assembly of stacked electrodes and separators. The cup part comprises a plurality of outer walls forming a periphery of the cup part, and a plurality of die edges connecting the plurality of outer walls to a side or degassing part. At least one of the die edges can be rounded to define a curvature radius of 1 mm or less. The cup part can have a depth of 6.5 mm or less.

Abstract: A pouch-type battery case according to an embodiment of the present invention for achieving the above objects includes: a first case and a second case, in which cup parts each of which is configured to accommodate an electrode assembly, in which electrodes and separators are stacked, therein is formed, respectively; and a bridge formed between the two cup parts, wherein the bridge has a thickness of 2 mm or less.

Abstract: An apparatus for molding a battery case includes: a die having a top surface, on which a pouch film is seated, and having at least one molding space formed to be recessed inward from the top surface; and a punch disposed above the molding space and descending to insert the pouch film into the molding space so as to mold the pouch film, wherein the top surface of the die includes at least one die inclined surface.

Abstract: A pouch-type battery case according to an embodiment of the present invention includes a cup part configured to accommodate an electrode assembly, in which electrodes and separators are stacked, therein, wherein the cup part includes a plurality of punch edges configured to connect a plurality of outer walls configured to surround a periphery thereof to a bottom part, respectively, and each of the punch edge being rounded with a curvature radius of 1 mm or less.

Abstract: A pouch-type secondary battery according to an embodiment of the present invention for achieving the above object includes: an electrode assembly in which electrodes and separators are stacked; a pouch-type battery case comprising a cup part configured to accommodate the electrode assembly therein, wherein the pouch-type battery case comprises a side extending from the cup part, and the side includes: a sealing part disposed along an outer portion of the side; and a non-sealing part disposed between the cup part and the sealing part, wherein the side is configured to contact the cup part without adhering to the cup part and is folded at the non-sealing part.

Abstract: An apparatus for manufacturing a pouch of a secondary battery includes: a lower die, in which an accommodation groove for molding a cup part of the pouch is formed in a base surface, on which the pouch is disposed; a punch inserted into the accommodation groove to mold the cup part of the pouch; and a stripper to press a peripheral portion of the pouch, disposed in the periphery of a portion to be molded into the cup part of the pouch by the punch. The stripper and the lower die press and grip upper and lower portions of a peripheral portion of the pouch, respectively. The punch is inserted into the accommodation groove to mold the cup part, and a friction area, having surface roughness greater than that of the peripheral portion, is formed on a pressing surface of the lower die or the stripper.

Abstract: A pouch-type secondary battery according to an embodiment of the present invention for achieving the above object includes: an electrode assembly in which electrodes and separators are stacked; and a pouch-type battery case comprising a cup part configured to accommodate the electrode assembly therein, wherein a difference in width of the cap part and the electrode assembly is 2.5 mm or less.

Abstract: A secondary battery comprises: an electrode assembly having electrodes, a separator interposed between the electrodes, and electrode tabs; an electrode lead coupled to the electrode tabs; and a pouch configured to accommodate the electrode assembly therein, wherein the electrode tabs comprise a connection part connected to the electrodes, a coupling part coupled to the electrode lead in a state of being combined into a mass, and a bent part provided between the connection part and the coupling part, and the bent part comprises a first bent surface connected to the coupling part and bent at a first-b angle, a second bent surface connected to the connection part and bent at a second-b angle, and a connection surface configured to connect the first bent surface to the second bent surface, wherein the first-b angle is greater than the second-b angle.

Abstract: Provided is a pouch type battery case. The pouch type battery case include a cup part configured to accommodate an electrode assembly, which is formed by stacking electrodes and separators, therein and a plurality of die edges configured to connect an outer wall of the cup part to a side extending from the outer wall. At least one die edge includes a first area formed to be rounded with a first curvature radius and a second area formed to be rounded with a second curvature radius less than the first curvature radius.

Abstract: A pouch-type secondary battery includes an electrode assembly, in which a plurality of positive electrodes and a plurality of negative electrodes are alternately stacked with separators therebetween, and a pouch which is formed by sealing a pair of cases integrally connected to each other by a folding portion and includes an accommodation portion that accommodates the electrode assembly. A plurality of outer walls forming a perimeter of the accommodation portion may include a folding portion-side outer wall, which includes the folding portion, and a sealing portion-side outer wall which is connected to a sealing portion in which the pair of cases are fused to each other. An average distance between ends of the plurality of negative electrodes and the folding portion-side outer wall may be about 0.6 mm or less.

Abstract: A pouch-type battery case includes a cup portion, which accommodates therein an electrode assembly formed by stacking an electrode and a separator, and a plurality of die edges connecting an outer wall of the cup portion to a side extending from the outer wall. The die edges include a first region, which is rounded at a first radius (r1) of curvature and at which an electrode tab extending from the electrode is positioned, and a second region which is other than the first region and rounded at one or more second radii (r2, r3, r4) of curvature less than or equal to the first radius (r1) of curvature. The second region is divided into an inner region and an outer region with respect to the first region, and the radius (r2) of curvature in the inner region differs from the radii (r3, r4) of curvature in the outer region.

Abstract: Provided is a pouch type battery case. The pouch type battery case include a cup part configured to accommodate an electrode assembly, which is formed by stacking electrodes and separators, therein and a plurality of die edges configured to connect an outer wall of the cup part to a side extending from the outer wall. At least one die edge includes a first area formed to be rounded with a first curvature radius and a second area formed to be rounded with a second curvature radius less than the first curvature radius.