Patents by Inventor John L. Ayres

John L. Ayres 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).

  • Distributed multi-module battery equalization
    Patent number: 5592067
    Abstract: An apparatus and method are disclosed for equalizing individual module voltages in a multiple module battery pack during recharging. Two individual module voltages are compared, and charge redistribution is caused to occur by way of switched mode converters when the voltages are not equivalent. Switched mode converters may be of unidirectional or bidirectional topologies.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: January 7, 1997
    Assignee: General Motors Corporation
    Inventors: David A. Peter, John L. Ayres
  • Battery cycle life improvements through bifurcated recharge method
    Patent number: 5561360
    Abstract: A two part battery recharge method first introduces stepped charge current to the battery to restore a majority of energy to a deeply discharged battery. Thereafter, relatively low frequency periodic charge currents and discharge currents interspersed with relaxation periods are introduced to the battery to effectuate efficient energy restoral and increased cycle life of the battery.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: October 1, 1996
    Assignee: General Motors Corporation
    Inventors: John L. Ayres, Richard M. Bendert, Dell A. Crouch, Jr.