Patent attributes
This invention is an improved method for making a battery case feedthrough. It utilizes stainless steel or titanium metal clad with aluminum. The use of the clad metal enables the fabrication of the battery case and cover and feedthrough pin assembly where a high temperature ceramic-metal hermetic seal is needed between a stainless steel feedthrough pin and a ceramic insulator; and between a ceramic insulator and a surrounding hollow cylinder. A high temperature hermetic seal is also used to fasten the feedthrough pin assembly to the upper stainless steel part of the stainless steel-aluminum clad cover. Titanium can be substituted for stainless steel. Lower temperature metal-metal hermetic seals are needed between the aluminum-clad part of the cover and the aluminum battery casing.
