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Method and design for externally applied laser welding of internal connections in a high power electrochemical cell

United States Patent

January 21, 2014
View the Complete Patent at the US Patent & Trademark Office
An electrochemical cell includes components that are welded from an external source after the components are assembled in a cell canister. The cell canister houses electrode tabs and a core insert. An end cap insert is disposed opposite the core insert. An external weld source, such as a laser beam, is applied to the end cap insert, such that the end cap insert, the electrode tabs, and the core insert are electrically coupled by a weld which extends from the end cap insert to the core insert.
Martin; Charles E. (Georgetown, MA), Fontaine; Lucien (Lincoln, RI), Gardner; William H. (East Freetown, MA)
A123 Systems LLC (Livonia, MI)
12/ 623,967
November 23, 2009
This invention was made with government support under Contract No. DE-FC26-05NT42403 awarded by the Department of Energy. The Government has certain rights in this invention.