Lg Energy Solution, Ltd.

Hyung Ho Kwon

Jeong Min Ha

Hyun Beom Kim

Se Young Oh

Geun Hee Kim

Sin Woong Kim

Gi Man Kim

Dae Hong Kim

Sang Hun Kim

Chung Hee Lee

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.

Pouch-type secondary battery and battery module having the same

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.

Pouch-type battery case and pouch type secondary battery

Battery

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 (r) 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 (r, r, r) of curvature less than or equal to the first radius (r) of curvature. The second region is divided into an inner region and an outer region with respect to the first region, and the radius (r) of curvature in the inner region differs from the radii (r, r) of curvature in the outer region.

Pouch-type battery case, apparatus for forming same, and pouch-type secondary battery

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.

Pouch type battery case, apparatus for molding the same, and pouch type secondary battery

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Daejeon, South Korea

Hyung Ho Kwon