| Patent Number |
Title Of Patent |
Date Issued |
| 7592097 |
Electrochemical cell designs with anode plates and connections which facilitate heat dissipation |
September 22, 2009 |
| Heat generation is an important concern of electrochemical cell design. The invention is directed toward a cell design that efficiently and responsively dissipates heat by transfer from the cell to the casing through multiple parallel connections. This invention relates to battery de |
| 7432001 |
Prevention of lithium deposition in nonaqueous electrolyte cells by electrolyte-to-cathode weigh |
October 7, 2008 |
| The prevention of lithium clusters from bridging between the negative and positive portions of a cell during discharge is described. This is done by limiting the amount of electrolyte in the cell, thereby eliminating excess electrolyte pooling above the cell stack. It is in this excess |
| 7422826 |
In situ thermal polymerization method for making gel polymer lithium ion rechargeable electroche |
September 9, 2008 |
| A single step, in situ curing method for making gel polymer lithium ion rechargeable cells and batteries is described. This method used a precursor solution consisting of monomers with multiple functionalities such as multiple acryloyl functionalities, a free-radical generating activ |
| 7375496 |
Discharge methodologies for lithium/silver vanadium oxide cells to manage voltage delay and perm |
May 20, 2008 |
| It is known that reforming implantable defibrillator capacitors at least partially restores and preserves their charging efficiency. An industry-recognized standard is to reform implantable capacitors by pulse discharging the connected electrochemical cell about once every three mont |
| 7314685 |
Oxidized titanium as a cathodic current collector |
January 1, 2008 |
| A titanium substrate having a thickened outer oxidation layer provided thereon by a treatment process performed either in an air atmosphere at elevated temperatures or through electrolytic oxidation (anodization), is discribed. The thusly conditioned titanium substrate serving as a catho |
| 7211349 |
Silver vanadium oxide provided with a metal oxide coating |
May 1, 2007 |
| An improved cathode material for nonaqueous electrolyte lithium electrochemical cell is described. The preferred active material is .epsilon.-phase silver vanadium oxide (Ag.sub.2V.sub.4O.sub.11) coated with a protective layer of a metal oxide, preferably .gamma.-phase SVO (Ag.sub.1. |
| 7118829 |
Preparation of copper silver vanadium oxide from .gamma.-phase SVO starting material |
October 10, 2006 |
| The current invention relates to the preparation of an improved cathode active material for non-aqueous lithium electrochemical cell. In particular, the cathode active material comprises .epsilon.-phase silver vanadium oxide prepared by using a .gamma.-phase silver vanadium oxide sta |
| 7108942 |
Efficient electrode assembly design for cells with alkali metal anodes |
September 19, 2006 |
| Electrochemical cells having the casing as part of the anode current collector are described. In particular, the anode is divided into two sections. In one section, lithium metal is pressed directly into contact with the inner surface of the casing. No anode current collector is need |
| 7092830 |
Method for estimating long term end-of-life characteristics using short-term data for lithium/si |
August 15, 2006 |
| The present invention is directed to a method for analyzing the tail-end behavior of a lithium cell having a solid cathode. The tail of a longer-term accelerated discharge data (ADD) test is estimated from the tail of two shorter-term ADD tests. This is accomplished by first comparin |
| 7068036 |
Lithium/carbon monofluoride (Li/CF.sub.x) electrochemical cell projection model |
June 27, 2006 |
| A model for estimating the discharge profile of a Li/CF.sub.x cell is described. The model uses as inputs the load at which the cell is subjected to and the planar surface area to estimate current density. Then, current density is used to estimate cell voltage at each 2% depth-of-dis |
| 7056358 |
Method for using high rate lithium electrochemical cell containing SVO/CFchi/SVo sandwich cathod |
June 6, 2006 |
| A method for powering an implantable medical device with a lithium electrochemical cell having a sandwich cathode electrode of SVO/CF.sub.x/SVO active materials is described. A preferred cathode is of a .gamma.-SVO/CF.sub.x/.gamma.-SVO or (.gamma.+.epsilon.)-SVO/CF.sub.x/(.gamma.+.ep |
| 7052804 |
Double current collector positive electrode for alkali metal ion electrochemical cells |
May 30, 2006 |
| A new sandwich positive electrode design for a secondary cell is provided comprising a "sacrificial" alkali metal along with a cathode active material. In the case of silver vanadium oxide, the sacrificial alkali metal is preferably lithium. Upon activating the cells, the lithium metal |
| 7033707 |
Organic cyclic carbonate additives for nonaqueous electrolyte in alkali metal electrochemical ce |
April 25, 2006 |
| A lithium electrochemical cell of either a primary or a secondary chemistry activated with an electrolyte having a cyclic carbonate of a ring size equal to or larger than a six-member ring is described. The cyclic carbonate helps to make the anode passivation film ionically conductiv |
| 7026791 |
Electrochemical treatment method to reduce voltage delay and cell resistance in lithium/silver v |
April 11, 2006 |
| It is known that reforming implantable defibrillator capacitors at least partially restores and preserves their charging efficiency. An industry-recognized standard is to reform implantable capacitors by pulse discharging the connected electrochemical cell about once every three mont |
| 7005214 |
Noble metals coated on titanium current collectors for use in nonaqueous Li/CF.sub.x cells |
February 28, 2006 |
| A lithium/fluorinated carbon electrochemical cell having the CF.sub.x material supported on a titanium current collector screen sputter coated with a noble metal is described. The gold, iridium, palladium, platinum, rhodium and ruthenium-coated titanium current collector provides the cel |
| 6984468 |
Hermetically sealed coin cell |
January 10, 2006 |
| A hermetically sealed coin cell is described. The coin cell has the opposite polarity terminals isolated from one another by a glass-to-metal seal. Glassing a conductive disc inside a ring of greater diameter and height forms this seal. The height of the ring is equivalent to the des |
| 6982543 |
Methods to improve efficiency of lithium/silver vanadium oxide cell discharge energy in implanta |
January 3, 2006 |
| It is known that reforming implantable defibrillator capacitors at least partially restores and preserves their charging efficiency. An industry-recognized standard is to reform implantable capacitors by pulse discharging the connected electrochemical cell about once every three mont |
| 6951576 |
Wound element electrode assembly design for use in prismatic case electrochemical cells |
October 4, 2005 |
| An anode-cathode sub-assembly for an electrochemical cell wherein a combination of an elongated alkali metal anode and elongated solid cathode within separator therebetween is wound using a mandrel to form the sub-assembly having a jellyroll type configuration and wherein the winding |
| 6936379 |
Method for electrode design for implantable device applications that require the elective replac |
August 30, 2005 |
| A method for providing a physician with an elective replacement indicator (ERI) for an implantable medical device is described. The medical device is powered by an electrochemical having a lithium anode coupled to a sandwich cathode comprising the configuration: SVO/current collector |
| 6930468 |
Discharge methodologies for optimizing the performance of lithium/silver vanadium oxide cells |
August 16, 2005 |
| It is known that reforming implantable defibrillator capacitors at least partially restores and preserves their charging efficiency. An industry-recognized standard is to reform implantable capacitors by pulse discharging the connected electrochemical cell about once every three mont |
| 6926991 |
SVO/CFx parallel cell design within the same casing |
August 9, 2005 |
| A new cathode design has a first cathode active material of a relatively low energy density but of a relatively high rate capability contacted to a first cathode current collector and a second cathode active material having a relatively high energy density but of a relatively low rate |
| 6919141 |
Phosphate additives for nonaqueous electrolyte rechargeable electrochemical cells |
July 19, 2005 |
| A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one phosphate additive having the formula: (R.sup.1 O)P(.db |
| 6872490 |
Preparation for a cathode material by a two-step reduction/oxidation synthesis process |
March 29, 2005 |
| The current invention provides a method of preparing a cathode material in a sequential two-part reaction process. In the first step, silver nitrate and vanadium oxide are decomposed by heat under an inert atmosphere. In the second part of the process, the resulting intermediate material |
| 6844115 |
Highly conductive and stable nonaqueous electrolyte for lithium electrochemical cells |
January 18, 2005 |
| The present invention is directed to at least partially replacing PC and/or DME with a linear carbonate, preferably dimethyl carbonate, and a linear mono-ether, the most preferred being diisopropyl ether, in electrolytes useful for activating alkali metal-containing cells. This electroly |
| 6803147 |
Silver vanadium oxide having low internal resistance and method of manufacture |
October 12, 2004 |
| The current invention relates to the preparation of an improved cathode active material for non-aqueous lithium electrochemical cell. In particular, the cathode active material comprises .epsilon.-phase silver vanadium oxide prepared by using a .gamma.-phase silver vanadium oxide sta |
| 6801016 |
Matching cells for a battery pack |
October 5, 2004 |
| A battery pack having a first secondary cell and a second secondary cell, preferably of a non-aqueous chemistry, is described. Each secondary cell has a discharge capacity and an internal resistance to a direct charge current. To diminish and alleviate problems associated with extended |
| 6797019 |
Electrochemical cell having an electrode of silver vanadium oxide coated to a current collector |
September 28, 2004 |
| The invention is directed to an SVO electrochemical cell having high rate capability. The cathode is produced by coating a mixture of an active material, conductive additives, a mixed binder, and an aluminum foil current collector. The mixed binder consists of a mixture of heat treated |
| 6797017 |
Preparation of .epsilon.-phase silver vanadium oxide from .gamma.-phase SVO starting material |
September 28, 2004 |
| The current invention relates to the preparation of an improved cathode active material for non-aqueous lithium electrochemical cell. In particular, the cathode active material comprises .epsilon.-phase silver vanadium oxide prepared by using a .gamma.-phase silver vanadium oxide sta |
| 6790561 |
Process for fabricating continuously coated electrodes on a porous current collector and cell de |
September 14, 2004 |
| The invention is directed to an electrochemical cell having at least one of its electrodes produced by coating a slurry mixture of an active material, possibly a conductive additive, and a binder dispersed in a solvent and contacted to a perforated current collector foil. It is particula |
| 6783888 |
Control of cell swelling by the proper choice of carbon monofluoride (CFx) cathode materials in |
August 31, 2004 |
| The minimization or elimination of swelling in lithium cells containing CF.sub.x as part of the cathode electrode and discharged under high rate applications is described. When CF.sub.x materials are synthesized from fibrous carbonaceous materials, in comparison to petroleum coke, cell |
| 6780542 |
Lithium oxyhalide cell with improved safety and voltage delay characteristics |
August 24, 2004 |
| The present invention is directed to providing a lithium carbonate passivation layer on lithium through exposure of the active material to gaseous carbon dioxide prior to cell assembly. This results in an electrochemical cell which possesses improved safety and voltage delay characte |
| 6767670 |
Carbon-coated titanium current collectors for use in alkali metal electrochemical cells |
July 27, 2004 |
| An alkali metal/solid cathode electrochemical cell, such as of a Li/SVO couple, having the cathode material supported on a titanium current collector screen coated with a carbonaceous material is described. The thusly-coated titanium current collector provides the cell with higher ra |
| 6759170 |
Organic carbonate additives for nonaqueous electrolyte rechargeable electrochemical cells |
July 6, 2004 |
| A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one carbonate additive to an electrolyte comprising an alkali |
| 6759164 |
Use of heat-treated electrodes containing a polyamic acid-PVDF binder mixture |
July 6, 2004 |
| A mixture of polymeric binders that is insoluble in nonaqueous organic electrolytes activating alkali metal or alkali metal ion electrochemical cells, is described. The mixed binder formulation provides electrodes that are flexible and non-brittle, and cells incorporating the electrodes |
| 6746804 |
Nonaqueous organic electrolytes for low temperature discharge of rechargeable electrochemical ce |
June 8, 2004 |
| An alkali metal secondary electrochemical cell, and preferably a lithium ion cell, activated with an equilibrated quaternary solvent system, is described. The solvent system comprises a mixture of dialkyl carbonates and cyclic carbonates, and preferably a quaternary mixture of dimethyl |
| 6744238 |
Method of using a cell |
June 1, 2004 |
| The invention includes a method of using a cell, such as a battery. In a method according to the invention, the cell is charged, discharged, and a voltage of the cell is measured after the discharge period. The measured voltage is compared to a standard voltage, and then the cell is char |
| 6743550 |
Double current collector cathode design using chemically similar active materials for alkali met |
June 1, 2004 |
| The present invention relates to a new sandwich cathode design having two cathode active materials provided on opposite sides of a current collector. The respective active materials are similar in terms of, for example, their rate capability, their energy density, or some other param |
| 6743547 |
Pellet process for double current collector screen cathode preparation |
June 1, 2004 |
| An electrode having the configuration: first active material/current collector/second active material is described. One of the electrode active materials in a cohesive form of active particles being firmly held together as part of the same mass is incapable of moving through the curr |
| 6737191 |
Double current collector negative electrode design for alkali metal ion electrochemical cells |
May 18, 2004 |
| A new sandwich negative electrode design for a secondary cell is provided comprising a "sacrificial" alkali metal along with a carbonaceous anode material. In the case of a hard carbon anode material, the sacrificial alkali metal is preferably lithium and is sized to compensate for the |
| 6730437 |
Anode for nonaqueous secondary electrochemical cells |
May 4, 2004 |
| The negative electrode or anode for a secondary electrochemical cell comprising a mixture of graphite or "hairy carbon" and a lithiated metal oxide, a lithiated mixed metal oxide or a lithiated metal sulfide, and preferably a lithiated metal vanadium oxide, is described. A most prefe |
| 6727022 |
Powder process for double current collector screen cathode preparation |
April 27, 2004 |
| The present comprises an electrode having the configuration: first active material/current collector screen/second active material. When one of the active materials is in a powder form, it is possible for that material to move through openings in the current collector screen to "contamin |
| 6696201 |
Electrochemical cell having a cathode of a mixed phase metal oxide and method of preparation |
February 24, 2004 |
| An electrochemical cell comprising an anode of a Group IA metal and a cathode of a mixed phase metal oxide prepared from a combination of starting materials comprising vanadium oxide and a mixture of at least one of a decomposable silver-containing constituent and a decomposable copp |
| 6692871 |
Double current collector cathode design for alkali metal electrochemical cells having short circ |
February 17, 2004 |
| A new sandwich cathode design having a first cathode active material of a relatively low energy density but of a relatively high rate capability sandwiched between two current collectors and with a second cathode active material having a relatively high energy density but of a relatively |
| 6692865 |
Double current collector cathode design using mixtures of two active materials for alkali metal |
February 17, 2004 |
| A new sandwich cathode design is provided having a first cathode structure of a first cathode active material of a relatively low energy density but of a relatively high rate capability, for example SVO, mixed with a second cathode active material having a relatively high energy density |
| 6685752 |
Method for providing a cathode of a mixed phase metal oxide |
February 3, 2004 |
| An electrochernical cell comprising an anode of a Group IA metal and a cathode of a mixed phase metal oxide prepared from a combination of starting materials comprising vanadium oxide and a mixture of at least one of a decomposable silver-containing constituent and a decomposable cop |
| 6677077 |
Electrochemical cell having multiplate electrodes with differing discharge rate regions |
January 13, 2004 |
| An electrochemical cell comprising a medium rate electrode region intended to be discharged under a substantially constant drain and a high rate electrode region intended to be pulse discharged, is described. Both electrode regions share a common anode and are activated with the same |
| 6673493 |
Double current collector cathode design using the same active material in varying formulations f |
January 6, 2004 |
| A new sandwich cathode design is provided comprising a cathode active material mixed with a binder and a conductive diluent in at least two differing formulations. The formulations are then individually pressed on opposite sides of a current collector, so that both are in direct contact |
| 6673487 |
Double current collector cathode design using the same active material in varying thicknesses fo |
January 6, 2004 |
| A new sandwich cathode design is provided comprising a cathode active material provided in at least two different thicknesses. The different thickness cathode structures are then individually pressed on opposite sides of a current collector so that both are in direct contact with the |
| 6641953 |
Secondary cell with high rate pulse capability |
November 4, 2003 |
| A rechargeable lithium-ion cell capable of being discharged to deliver high power pulses sufficient for implantable defibrillation applications and the like, is described. The cell is housed in a casing having an external volume of 5 cm.sup.3, or less. Both the negative and positive elec |
| 6635381 |
Electrochemical lithium ion secondary cell having a scalloped electrode assembly |
October 21, 2003 |
| A lithium ion secondary battery having an irregular shape with a unitary anode and unitary cathode that are spirally wound and that provide a high energy density for an implantable biomedical device. |
