Dissimilar Material Battery Enclosure for Improved Weld Structure
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United States of America Patent
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Issued Date -
Nov 8, 2012
app pub date -
May 4, 2012
filing date -
May 6, 2011
priority date (Note) -
Abandoned
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Abstract
An electrochemical cell having an enclosure comprised of an enclosure body portion composed of a relatively high electrical resistivity material and an enclosure lid portion composed of a ductile material is discussed. The body portion of the enclosure preferably comprises Grade 5 or 23 titanium and the lid portion preferably comprises Grade 1 or 2 titanium. The enclosure lid is joined to the body of the enclosure through a welding process such as laser welding. The combination of these differing materials provides an enclosure that effectively retards the occurrence of eddy current induced heating as well as provides an enclosure that is more mechanically robust.
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