Patents by Inventor Rebecca R. Chang

Rebecca R. Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Lithium-ion battery charge control method
    Patent number: 5939864
    Abstract: A technique of operating a lithium-ion (Li-ion) battery is proposed for maximizing battery life. In a first instance, this technique calls for charging the battery at a lower temperature than the temperature at which discharge begins. Preferably, the battery is charged at a temperature T.sub.1 in the range between about +5.degree. C. and -20.degree. C.; and discharged at a temperature T.sub.2, in the range of about +5.degree. C. to +30.degree. C., T.sub.2 being higher than T.sub.1. In another instance proposed by the invention, the battery is charged to an elevated state of charge which is above an initial state of charge at a temperature T.sub.1 between about +5.degree. C. and -20.degree. C. which is lower than a temperature T.sub.2, in the range of about +5.degree. C. to +30.degree. C., at which discharge begins.
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: August 17, 1999
    Assignee: Space Systems/Loral, Inc.
    Inventors: Stephen J. Lenhart, Rebecca R. Chang