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|1. (WO2018124673) CYLINDRICAL BATTERY CELL HAVING HEAT-SHRINKABLE TUBE COMPRISING ULTRAVIOLET ABSORBER|
|Applicants:||LG CHEM, LTD.
HWANG BO, Kwang-Su
|Title:||CYLINDRICAL BATTERY CELL HAVING HEAT-SHRINKABLE TUBE COMPRISING ULTRAVIOLET ABSORBER|
The present invention relates to a cylindrical battery cell having a heat-shrinkable tube wrapping around an outer surface of a cylindrical case excluding electrode terminal portions, wherein the heat-shrinkable tube comprises: a tube base made of a polyester-based resin having heat shrinkability; a reinforcing agent made of a nylon resin for increasing the tensile strength and use temperature of the heat-shrinkable tube; and an ultraviolet absorber which absorbs ultraviolet rays irradiated to the heat-shrinkable tube and emits the ultraviolet rays as heat energy, thereby preventing polymer chains of a nylon-based resin or a polyester-based resin from reacting with oxygen to cause a decomposition reaction.