Medtronic, Inc.

David R Berberick

William G Howard

Donald R Merritt

Paul M Skarstad

Douglas J Weiss

John W Cretzmeyer

Jonas A Runquist

An improved electrolyte for electrochemical cells including as a cosolvent for the cell electrolyte salt an amount of diglyme; ethyl diglyme; ethyl glyme; triglyme, tetraglyme and higher glymes; dimethoxymethane; 1,2-dimethoxypropane; dimethoxy THF or mixtures thereof.

Electrolyte for lithium-manganese oxide cells and the like

Double seal arrangement with intermediate test gas holding means for leak testing and assuring high hermetic batteries.

Battery fill-post seal arrangement for hermeticity leakage testing

Battery fill-port seal arrangement for hermeticity leakage testing

Improved current collector design for controlling battery current capability by providing consistent controlled surface area contact between the carbon element of the current collector and its electrical terminal means.

Current collectors for batteries having cathode-electrolytes and

A nonaqueous cell comprising an active metal anode, such as a lithium, sodium, potassium, calcium or alloys, a liquid cathode-electrolyte comprising a solute dissolved in a solvent which, in a preferred aspect, is an oxyhalide of an element of Group V or Group VI of the Periodic Table and wherein the surface of the anode contacting the cathode-electrolyte is coated with a polymeric film having ether linkages. In a preferred practice of the present invention, the anode is coated with polyethersulfone.

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Maple Grove, MN, United States of America

David R Berberick