Medtronic, Inc.

Medtronics, Inc.

Paul M Skarstad

Douglas J Weiss

William G Howard

Ann M Crespi

Craig L Schmidt

Donald R Merritt

Darrel F Untereker

Roger W Kelm

Thomas G Hayes

Arthur J Coury

Fred J Berkowitz

John W Cretzmeyer

David L Thompson

Nathan Andrew Torgerson

Robert Leinders

John W Forsberg

John J Grevious

Glenn M Roline

Robert E Kraska

Lucy M Nichols

Raymond F McMullen

Steven L Jensen

Kaimin Chen

David R Berberick

Paul B Wyborny

Fred J Berkcwitz

The present teachings include an electrochemical cell including an anode, a cathode, an electrolyte, a separator disposed between the cathode and anode, and a housing containing the anode, cathode, electrolyte, and separator. The separator can include a first sheet consisting essentially of a single layer material and a second sheet distinct from the first sheet. The second sheet can include an inner microporous layer laminated between two more outer layers. In some cells, the inner layer can have a transition temperature between a porous configuration and a substantially non-porous configuration that is between about 80 degrees C. and 150 degrees C., and in which the two more outer layers maintain their structural integrity to at least about 10 degrees C. greater than the first layer transition temperature.

Implantable battery having thermal shutdown separator

An implantable medical device includes a control circuit for controlling the operation of the device and for obtaining physiological data from a patient in which the medical device is implanted. The implanted device also includes a communication circuit for transmitting the physiological data to an external device. A first power source is coupled to the control circuit and provides power to the control circuit. A second power source is coupled to the communication circuit and provides power to the communication circuit.

Implantable medical device with a dual power source

A method of evaluating an electrochemical cell for a metallic contaminant-caused defect. The electrochemical cell is configured for use with an implantable medical device and includes an anode, a solid cathode and a liquid electrolyte. The method includes storing the cell at an elevated temperature following assembly for accelerating corrosion of possible metallic contaminants. A parameter of the cell related to cell voltage is then measured. An evaluation is made as to whether the cell is defective based upon this measured parameter.

Method and system for evaluating an electrochemical cell for use with an implantable medical device

An electrochemical cell and electrode assembly in which an alkali metal anode and a cathode assembly are wound together in a unidirectional winding having substantially straight sides such that the winding will fit into a prismatic cell. The anode and cathode are arranged in the winding to provide for even utilization of reactive material during cell discharge by placing cathode and anode material in close proximity throughout the electrode assembly in the proportions in which they are utilized. The winding also contributes to even utilization of reactive material by employing multiple tabs on the cathode assembly to ensure that cathode material is evenly utilized throughout the electrode assembly during cell discharge and also so that connections to the tabs are readily made.

High reliability electrochemical cell and electrode assembly therefor

Method for making a high reliability electrochemical cell and electrode

An electrochemical cell using a lithium anode and a silver vanadium oxide cathode is provided in which the cell is anode limited. Preferably, only enough lithium and electrolyte are provided in an Li/SVO cell to allow it to discharge only to the start of the second voltage plateau of its discharge curve. This provides a cell with improved performance in implantable defibrillator applications.

Rebalancing of lithium/silver vandium oxide (Li/SVO) cells for improved

A method and apparatus for determination of battery end-of-service in a medical device in which the medical device comprises a cathode limited electrochemical cell having an active metal anode and a manganese dioxide cathode and means for digital telemetry of cell voltage. The sloped, well defined voltage curve of such a cell during cell discharge combined with precise information available through digital telemetry allows for improved determination of battery end-of-service for the medical device.

Method and apparatus for determination of end-of-service for implantable

Non-aqueous cells employing an anode, such as lithium, a liquid organic electrolyte and a cathode comprising manganese dioxide (MnO.sub.2), carbon monofluoride (CF.sub.x) or mixtures of the two and an additive selected from the group consisting of vanadium oxide (V.sub.6 O.sub.13+y), silver vanadate (.beta.Ag.sub.x V.sub.2 O.sub.5, .delta.Ag.sub.x V.sub.2 O .sub.5 or Ag.sub.2 V.sub.4 O.sub.11), bismuth flouride (BiF.sub.3) and titanium sulfide (TiS.sub.2) as an end-of-service (EOS) indicator.

Electrochemical cells with end-of-service indicator

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

Improved halogen cathode materials having oxygen-based components and electrochemical cells incorporating same.

Electrochemical cells and cathode materials

Electrochemical cells having an oxidizable active anode material, a solid, non-reactive electronically conductive cathode current collector, and an electrolytic solution between and in contact with the anode and the cathode current collector, the electrolytic solution comprising a solvent cathode component which is a liquid oxyhalide or thiohalide. And anode ion transporting solute component dissolved therein for rendering the electrolytic solution conductive of anode metal ions, the electrolytic solution having an end-of-life (EOL) component associated therewith, the EOL component being selected from the group consisting of the Main Group V halides preferably arsenic tribromide (AsBr.sub.3), arsenic trichloride (AsCl.sub.3), arsenic trifluoride (AsF.sub.3), vanadium halides, transition metal sulfides, oxides, except for the actinide series and technetium, and mixtures thereof to provide end-of-life indication. The EOL component selected in any specific instance has an electropotential which is lower than that of the specific solvent cathode component used i.e., the primary cathode material in the electrolytic solution.

Electrochemical cells with end-of-life indicator

Electrochemical cells comprising an active metallic anode, preferably lithium, a non-aqueous electrolyte, preferably thionyl chloride, and a lithium tetrachloroiodate (LiICl.sub.4) cathode.

Electrochemical cells having lithium tetrachloroiodate cathodes

Battery cathodes of the iodine-complex type including one or more additives for improved iodine utilization.

Growing community of inventors

Plymouth, MN, United States of America

Paul M Skarstad