Patent Application - Closure Assembly with Low Vapor Transmission for Electrochemical Cell > Summary

Patent Application No. US 20120151754

Published on Jun 21, 2012

Application No. 13/405855

Filed on Feb 27, 2012

Priority Date -

Wu, James X. - North Olmsted, OH US (35)

A closure assembly for an electrochemical cell including a container and an end assembly sealing an open end of the container in order to minimize mass or weight loss of the cell due to electrolyte vapor transmission is disclosed. The end assembly is provided with a vent member capable of venting a fluid when the pressure within the cell exceeds a predetermined limit; a contact member operatively in electrical contact with a conductive contact of the end assembly and a current collector of an electrode of the cell; and an insulating, polymeric seal member disposed at least between conductive components of the closure assembly having different polarities. In a preferred embodiment, the seal member has a selected dimensional ratio in order to minimize vapor transmission of the electrolyte through the seal member.