Current collector and battery cell having the same

A battery cell comprising:

• an electrode assembly including a cathode, an anode, and a separator;
• a cell case accommodating the electrode assembly;
• a cap plate connected to the cell case and including a through-hole;
• an electrode terminal disposed in the through-hole of the cap plate and including a coupling hole;
• and
• a current collector electrically connecting the electrode assembly and the electrode terminal,
• wherein the current collector includes a current collecting plate electrically connected to the electrode assembly and a current collecting pin connected to the current collecting plate and inserted into the coupling hole,
• the current collecting pin includes a first portion disposed at an outer side spaced apart from the current collecting plate, a third portion connected to the current collecting plate, and a second portion disposed between the first portion and the third portion, and
• at least one of an outer diameter of the second portion or a maximum outer diameter of the third portion is greater than an outer diameter of the first portion.