Rechargeable battery

摘要

A rechargeable battery includes an electrode assembly for performing charging and discharging operations, a case accommodating the electrode assembly, a cap plate coupled to an opening of the case, an electrode terminal installed on the cap plate, and a lead tab connecting the electrode assembly to the electrode terminal, the lead tab including a terminal connection part connected to the electrode terminal, and a current-collecting connection part connected to the electrode assembly, the current-collecting connection part including a welding portion connected to the electrode assembly, and an absorption portion separated from the welding portion in a first direction parallel to the cap plate and provided on an outer side of the welding portion.

主权项

1. A rechargeable battery, comprising:
an electrode assembly for performing charging and discharging operations; a case accommodating the electrode assembly; a cap plate coupled to an opening of the case; an electrode terminal installed on the cap plate; and a lead tab connecting the electrode assembly to the electrode terminal, the lead tab including: a terminal connection part connected to the electrode terminal; and a current-collecting connection part connected to the electrode assembly, the current-collecting connection part including: a welding portion connected to a first side of the electrode assembly; and an absorption portion separated from the welding portion in a first direction parallel to the cap plate and with a space being provided between the absorption portion and an outer side of the welding portion, the space being disposed at least in part beyond the first side of the electrode assembly, wherein: the welding portion is welded to an uncoated region of the first side of the electrode assembly, the absorption portion is spaced apart from the welding portion by a slot hole formed along a length of the current-collecting connection part between the absorption portion and the welding portion, and the slot hole is formed in a curved line along the length of the current-collecting connection part.