A final closure sealing member and a method for hermetically sealing an opening, such as an electrolyte fill opening in an electrochemical cell or a battery, are disclosed. After a cell is fully assembled and filled with electrolyte, the present sealing member is force-fit into sealing registry with...http://www.google.es/patents/US5776632?utm_source=gb-gplus-sharePatente US5776632 - Hermetic seal for an electrochemical cell
