SEALING BODY FOR SEALED BATTERY, AND SEALED BATTERY EMPLOYING THE SAME

摘要

<P>PROBLEM TO BE SOLVED: To provide a sealed battery without possibility of liquid leakage with high productivity. Ž<P>SOLUTION: A sealing body for the sealed battery has: a sealing plate of a nearly rectangular shape; a terminal plate of a flat-plate shape; an insulating gasket to insulate the terminal plate and the sealing plate; a terminal rivet; and an insulating plate to insulate the sealing plate and the terminal rivet. The sealing body has a structure in which the terminal plate and the terminal rivet are fixed to the sealing plate by caulking the insulating gasket and the insulating plate. The sealing body has pressure dispersion grooves in the vicinity of the terminal plate, the groove being formed with a line-symmetry in relation to a center line passing through the terminal plate and orthogonal to a long axis of the sealing plate, and with a line-symmetry in relation to a center line passing through the terminal plate and parallel to a short axis of the of the sealing plate. The total length of the pressure dispersion grooves is 100 to 200% of the short axis length of the sealing plate. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž