General Electric Company

Gates Energy Products, Inc.

Arthur J Catotti

Saverio F Pensabene

Jon Kenneth West

Vincent J Puglisi

Douglas B Frye

Ferdinand H Mullersman

John S Hodgman

Michael J Wynn

Robert A Leclair

Carl F Van Conant

William L Fralick

A sealed rechargeable nickel electrode containing electrochemical cell has a pasted negative electrode having paste layers adhered to a nonforaminous conductive substrate, which retards growth (swelling) of the nickel electrode on cycling.

Rechargeable nickel electrode containing electrochemical cell and method

Rechargeable nickel electrode containing electrochemical cell

A wound electrode assembly for use in a sealed electrochemical cell. The wound electrode assembly has at least one electrode comprised of an electrically conductive substrate and an electrochemically active material secured to at least one face of the substrate. This one electrode defines an outer wrap for the electrode assembly. The electrochemically active material is absent from at least a portion of the exterior of the outer wrap to permit the first substrate in the outer wrap to contact at least a portion of the cell container into which the wound electrode assembly is positioned.

Wound electrode assembly for an electrochemical cell

A method and apparatus are provided for manufacturing an electrode for a rechargeable electrochemical cell by electrodepositing a metallic active material on a continuously moving metallic strip emmersed in an electrolytic bath containing an anode of the metal to be deposited. After depositing the metallic active material on the strip, the strip is passed through a second electrolytic bath wherein the metallic active material is at least partially oxidized.

Electrode for a rechargeable electrochemical cell and method and

A fluid handling system for circulating a selected fluid medium from a selected tank through one of a plurality of wash tanks for a predetermined period of time, draining the selected wash tank and thereby returning the fluid to the selected tank, and then filling the selected wash tank from a different tank and continuing the sequence for each of the different tanks. After a wash by medium from each tank, the object being washed is removed, and another is inserted. The sequential washes are repeated. This operation continues until the contents of a predetermined one of the tanks has degraded by a predetermined increase in impurity concentration, and for thereafter initiating a cascade whereby the tank having fluid of highest impurity concentration is drained, and the contents of each other tank is transferred to an adjacent tank, and completing the sequence by filling the predetermined tank with relatively pure fluid. The cascading sequence is effected with minimal impact on the washing sequences. Each of the fluid transfers from tank to wash tank and back is effected on a timed basis without significant mixing notwithstanding the fact that the particular medium employed prevents the use of a level sensor to identify when a wash tank has been pumped dry.

Fluid handling system

A system and method for washing flexible strip material using low amounts of fresh rinse water. The system comprises a wash tank having cascaded compartments and means for passing strip material into the tank and in serpentine fashion through the compartments. In the method the strip material in passing from one compartment to the next is raised above the wash liquid permitting wash liquid to drain back into the wash compartment from which it emerged.

Electrochemical cleaning cascade wash

A process for manufacturing electrodes for nickel-cadmium alkaline storage cells consisting essentially of the steps of forming a porous nickel plaque, immersing the plaque in a slightly acidic-cadmium nitrate solution, removing the plaque from the solution and heating the plaque in air until dry, immersing the dried plaque in an alkali hydroxide solution, removing the plaque from the hydroxide solution and rinsing the plaque with water, reheating the plaque in air until substantially dry, repeating the foregoing treatments until the desired electrochemical loading in the plaque pores is attained, heating the plaque with the desired electrochemical pore loading to a temperature of between about 200.degree. C. and 300.degree. C. until substantially all of the Cd(OH).sub.2 in the plaque is converted to CdO and nitrate impurities in the plaque are converted to nitrogen oxide gases and volatized, immersing the plaque with the converted CdO in a second alkali hydroxide solution, cathodizing the plaque in the second solution until about 20-40% of the CdO therein is converted to Cd, removing the cathodized plaque from the second solution, rinsing the plaque with water and heating the rinsed plaque until the plaque is substantially dry.

Sintered negative plate

A process for manufacturing electrodes for nickel-cadmium alkaline storage cells consisting essentially of the steps of forming a porous nickel plaque, immersing the plaque in a slightly acidic-cadmium nitrate solution, removing the plaque from the solution and heating the plaque in air until dry, immersing the dried plaque in an alkali hydroxide solution, removing the plaque from the hydroxide solution and rinsing the plaque with water, reheating the plaque in air until substantially dry, repeating the foregoing treatments until the desired electrochemical loading in the plaque pores is attained, heating the plaque with the desired electrochemical pore loading to a temperature of between about 200.degree. C and 300.degree. C until substantially all of the Cd (OH).sub.2 in the plaque is converted to CdO and nitrate impurities in the plaque are converted to nitrogen oxide gases and volatilized, immersing the plaque with the converted CdO in a second alkali hydroxide solution, cathodizing and then anodizing the plaque in the second solution, removing the cathodized and anodized plaque from the second solution, rinsing the plaque with water and heating the rinsed plaque until the plaque is substantially dry.

A controlled battery charger system is provided wherein a rechargeable battery is charged at a high charge rate and the voltage and temperature of the battery are both monitored by sensing means which are coupled to switching means to shut off the high charge-rate current when either the temperature or the voltage of the battery reaches a predetermined level.

Growing community of inventors

Gainesville, FL, United States of America

Arthur J Catotti