Secondary battery and battery pack including the same

A battery pack comprising:

• a housing;
• and
• a plurality of secondary batteries accommodated in the housing,
• wherein each of the secondary batteries comprises:
• a case;
• an electrode assembly accommodated in the case;
• a cap plate comprising a first surface facing the electrode assembly and a second surface opposite the first surface;
• a terminal passing through the cap plate and connected to the electrode assembly;
• and
• a gasket between the cap plate and the terminal and comprising a first end portion in contact with the cap plate and a second end portion in contact with the terminal,
• wherein a creepage distance of the gasket is greater than a separation distance between the first end portion and the second end portion.