Patent ID: 9741974
Date: 2017-08-22
CPC Classifications: H01M,Y02E,Y02P

Claim:
1. A battery cell comprising: an electrode assembly, the electrode assembly comprising: positive electrodes, negative electrodes, and separators disposed respectively between the positive electrodes and the negative electrodes, the electrode assembly being mounted in a battery case made of a laminate sheet comprising a resin layer and a metal layer, wherein the battery case is made of a one-unit member, which is bent to form an upper case and a lower case, wherein at least one of the upper and lower cases is provided with a receiving part, in which the electrode assembly is mounted, the receiving part having a round corner formed at at least one side edge thereof, wherein sealed portions, which are formed at the upper case and the lower case by thermal welding, are located at an upper side of the battery case at which at least one electrode terminal is located, a first lateral side of the battery case adjacent to the upper side, wherein a lower side of the battery case opposite to the upper side, and a second lateral side of the battery case adjacent to the upper side is formed by a fold line joining the upper case to the lower case, wherein the round corner is formed at an edge of the first lateral side of the battery case, and wherein the round corner has a maximum radius of curvature equivalent to 50% a length of a long side of the receiving part.