Secondary battery

摘要

A secondary battery including a case; an electrode assembly and electrolyte accommodated in the case; an electrode terminal electrically connected to the electrode assembly, the electrode terminal including a terminal body; a cap plate sealing the case, the terminal body penetrating through the cap plate; and a seal gasket surrounding a lower portion of the terminal body, wherein the electrode terminal includes a laterally protruding part on a portion of the terminal body protruding outside the case, and the seal gasket is in close contact with a lower end of the protruding part.

主权项

1. A secondary battery, comprising:
a case; an electrode assembly and electrolyte accommodated in the case; an electrode terminal electrically connected to the electrode assembly, the electrode terminal including a terminal body; a cap plate sealing the case, the terminal body penetrating through the cap plate; a seal gasket surrounding a lower portion of the terminal body; a separate lower insulation member in direct contact with a lower side surface of the seal gasket and a bottom surface of the cap plate; an upper insulation member in direct contact with a top surface of the cap plate and an upper side surface of the seal gasket; a terminal extension part riveted to a bottom portion of the terminal body and securely fixed thereto, the terminal extension part being in direct contact with a bottom surface of the lower insulation member; and a terminal welding part extending orthogonally from an end of the terminal extension part and being welded to an electrode non-coating portion of the electrode assembly, the electrode non-coating portion of the electrode assembly protruding toward one end of the cap plate, wherein: the electrode terminal includes a laterally protruding part on a portion of the terminal body protruding outside the case, the protruding part overlying a portion of the cap plate, and the seal gasket is in direct contact with a lower surface of the protruding part, the lower surface of the protruding part facing the cap plate.