Secondary battery including electrode lead exposed within the sealing part and method for manufacturing the same

A secondary battery comprising:

• an electrode assembly comprising an electrode and a separator;
• an exterior accommodating the electrode assembly, the exterior including an exterior body and a sealing part sealing an inner space defined by the exterior body;
• and
• one or more electrode leads connected to the electrode assembly,
• wherein each of the electrode leads comprises:
• an insulation part that is an area surrounded by the exterior;
• an exposure part disposed inside the sealing part and inside the insulation part and having an area that is exposed to an outside of the exterior, the area of the exposure part being configured to electrically connect with a component exterior to the secondary battery;
• and
• a connection part connecting the electrode assembly with the exposure part and disposed inside the insulation part, the connection part extending in a first direction from the electrode assembly into the sealing part, the exposure part extending in a second direction from the connection part to the area that is exposed to the outside of the exterior, the second direction being perpendicular to the first direction;
• wherein at least a portion of the exposure part is disposed inside the insulation part,
• wherein the electrode lead does not protrude to the outside of the exterior, and
• wherein the insulation part surrounds an entirety of the exposure part and the connection part.