Patent ID: 6554178
Filing Date: 2003-04-29
Classification: B23K,H01M,Y02E,Y02P,Y10T

Abstract:
A method for sealing a battery case comprising the steps of:providing a battery case comprising a first low melting point metal, said battery case having an upper surface having an outer edge; providing a cover having an outer, lower edge and comprising a sheet of a first high melting point metal hermetically clad with a second low melting point metal, the clad sheet having hole therethrough; furnishing a feedthrough comprising: a ceramic cylinder; a conductive pin through said ceramic cylinder and hermetically sealed thereto; and an annular cylinder comprising a second high melting point metal, surrounding said ceramic cylinder and hermetically sealed thereto; hermetically joining the feedthrough to the cover by using heat to join the second high melting point metal to the first high melting point metal; and hermetically attaching the first low melting point metal of the battery case to the second low melting point metal of the cover using heat such that the outer, lower edge of the cover is substantially flush with the outer edge of the upper surface of the battery case.