Electrochem Solutions Inc.

Engineered Power Ltd.

Greatbatch Ltd.

Mihai Albu

Douglas Woodnorth

Peter Polsonetti

Robert Yetman

Moazzam Aziz

Douglas J Woodnorth

Richard J Marshall

A battery adapted to operate at low (typically ambient) temperatures for a short initial period and thereafter at higher temperatures. A Li&#x2014;Mg alloy anode is provided, including up to 25% magnesium, in a liquid thionyl chloride bath which acts as the cathode. A thin, substantially pure lithium layer is applied to a surface of the Li&#x2014;Mg anode, preferably of a thickness in the range of 0.0019 to 0.0025 inch to allow obtaining of sufficiently high power and voltage output at lower temperatures for a short period where at such lower temperatures the required voltage and power would not otherwise be available from a Li&#x2014;Mg anode. Thereafter, the battery may be used in, and exposed to, higher temperatures where at such temperatures the necessary voltage and power from the remaining Li&#x2014;Mg alloy anode is then available.

High temperature lithium battery, having initial low temperature use capability

An apparatus and method for fabricating continuous cathode collecters for use in lithium/thionyl chloride and lithium/sulfuryl chloride cells is described. The preferred electrically conductive material is acetylene black mixed with a polytetrafluroethylene (PTFE) binder in a dry, powderized form. The collector substrate is a nickel or stainless steel foil that has been expanded into a mesh or otherwise provided with perforations. A centering adjustment of the collector substrate controls loading of the electrically conductive mixture onto each side thereof. The dry, powdered electrically conductive mixture is then continuously fed into the calender and formed into a collector structure by locking to itself through the collector substrate perforations before being cut to size.

Apparatus and method for fabricating cathode collectors for lithium/oxyhalide electrochemical cells

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West Roxbury, MA, United States of America

Robert Yetman