ELECTROCHEMICAL CELL HAVING COLLECTOR ELECTRICALLY INSULATED FROM COVER

摘要

An electrochemical cell (700) is provided comprising: a can (712) for containing electrochemically active materials including at least positive (115) and negative (120) electrodes and an electrolyte, the can (712) having an open end and a closed end; a cover (745) positioned across the open end o f the can (712) and connected to the can (712), the cover (745) having an aperture (751) extending therethrough; a current collector (740) extending through the aperture (751) of the cover (745) and extending internally withi n the can (712) to electrically contact one of the positive (115) and negative (120) electrodes; and a first insulating material (744) disposed between the collector (740) and the cover (745) for electrically insulating the collecto r (740) from the cover (745) and providing a seal between the collector (740) and the cover (745). A pressure relief mechanism (370) is preferably formed in the closed end of the can (712). Also provided is a method of assembling an electrochemical cell (700) comprising the steps of: dispensing electrochemically active materials in a can (712) having a closed end and an open end; disposing a current collector (740) through an aperture (751) form ed in a cover (745); providing an nsulating material (744) between the cover (745) and the collector (740),preferably by melting the insulating material (744) such that the melted insulating material (744) reforms between the collector (740) and the cover (745); and assembling the cover (745) and the collector (740) to the open end of the can (712). The cell construction allo ws a large internal volume to be available for containing electrochemically active materials.