Battery, and Battery Pack and Vehicle Including Same

A battery comprising:

• an electrode assembly comprising an electrode, the electrode having an uncoated area;
• a battery housing having an opening a first side of the battery housing and an inner space configured to accommodate the electrode assembly;
• a cap fixed to the battery housing and covering the opening;
• a gasket surrounding at least a portion of an edge of the cap, the gasket fixed between the cap and the battery housing;
• and
• a sealing portion at a first end of the gasket, the sealing portion comprising a first portion in close contact with a lower surface of the cap and a second portion in close contact with an inner surface of the battery housing.