Patents by Inventor Subhas Chalasani

Subhas Chalasani 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).

  • Battery health monitor
    Patent number: 7554294
    Abstract: A battery health monitor (BHM) that operates as a battery-mountable full-spectrum alternating current (ac) impedance meter that facilitates monitoring a state-of-charge and a state-of-health of a battery. The BHM is used for monitoring one or more electrical parameters, e.g., impedance, of a battery. The BHM includes: a current sink coupled to the first terminal and configured to sink therefrom an oscillatory current so as to cause the battery to produce at a first terminal thereof an oscillatory voltage equal to or less than a dc operating voltage of the battery that would be present at the first terminal in the absence of the oscillatory current; and a voltage sensor configured to sense the oscillatory voltage at the first terminal.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: June 30, 2009
    Assignee: The Johns Hopkins University
    Inventors: Rengaswamy Srinivasan, Hassan M. Saffarian, Terry E. Phillips, Paul R. Zarriello, Bliss G. Carkhuff, Subhas Chalasani
  • Battery healty monitor
    Publication number: 20060170397
    Abstract: A battery health monitor (BHM) that operates as a battery-mountable full-spectrum alternating current (ac) impedance meter that facilitates monitoring a state-of-charge and a state-of-health of a battery. The BHM is used for monitoring one or more electrical parameters, e.g., impedance, of a battery. The BHM includes: a current sink coupled to the first terminal and configured to sink therefrom an oscillatory current so as to cause the battery to produce at a first terminal thereof an oscillatory voltage equal to or less than a dc operating voltage of the battery that would be present at the first terminal in the absence of the oscillatory current; and a voltage sensor configured to sense the oscillatory voltage at the first terminal.
    Type: Application
    Filed: January 28, 2005
    Publication date: August 3, 2006
    Inventors: Rengaswamy Srinivasan, Hassan Saffarian, Terry Phillips, Paul Zarriello, Bliss Carkhuff, Subhas Chalasani
  • Apparatus for providing battery power to a telecommunication system
    Publication number: 20050077871
    Abstract: An apparatus for providing battery power to a telecommunication system having a plurality of components mounted in an equipment rack that presents a standard width for receiving the components. In one embodiment, the apparatus includes: (1) a housing configured for mounting above at least some of the plurality of components in the equipment rack and (2) at least one battery pack contained within the housing and consisting of sealed unit battery cells. In another embodiment, the apparatus includes: (1) a housing configured for mounting anywhere in the equipment rack and (2) at least one battery pack contained within the housing and consisting of sealed unit battery cells that employ lithium battery technology.
    Type: Application
    Filed: September 24, 2004
    Publication date: April 14, 2005
    Applicant: Tyco Electronics Power Systems, Inc., A Nevada Corporation
    Inventors: Subhas Chalasani, Roy Davis, Roy Kuipers, Patrick Ng