Patent ID: 7575829

Claim:
A battery case comprising: a battery body including a first metal; a cover bonded to the battery body such that a bottom side of the cover and the body define an interior of a battery, the cover including a second metal bonded to the first metal in the battery body, the second metal being clad with a third metal and the second metal being bonded to the third metal with a bond that is in accordance with a bond formed by a metal cladding process that relies on elevated pressure to cause diffusion of the second metal and the third metal into one another, the third metal covering less than 90% of an upper surface of the second metal, one or more holes extending through the second metal and the third metal, a feedthrough assembly positioned in one of the one or more holes, including a feedthrough pin, and a body surrounding the feedthrough pin, the body including a fourth metal bonded to the third metal with the fourth metal being a different piece of metal than the third metal.