Patents by Inventor Andrew C. Baisden

Andrew C. Baisden 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 phase meter to determine internal temperatures of lithium-ion rechargeable cells under charge and discharge
    Patent number: 8961004
    Abstract: Methods and systems to determine an internal temperature of a rechargeable lithium-ion cell based on a phase shift of the cell. Internal cell temperature may be determined with respect to an internal anode temperature and/or an internal cathode temperature. Internal anode temperature may be determined based on a phase shift of a frequency within a range of approximately 40 Hertz (Hz) to 500 Hz. Internal cathode temperature may be determined based on a phase shift of a frequency of up to approximately 30 Hz. A temperature sensor as disclosed herein may be powered by a monitored cell with relatively little impact on cell charge, may be electrically coupled to cell but housed physically separate from the cell, and/or may monitor multiple cells in a multiplex fashion. A rate of change in phase shift may be used to initiate pre-emptive action, without determining corresponding temperatures.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: February 24, 2015
    Assignee: The Johns Hopkins University
    Inventors: Rengaswamy Srinivasan, Michael H. Butler, Bliss G. Carkhuff, Terry E. Phillips, Jeremy D. Walker, Oscar M. Uy, Andrew C. Baisden
  • Battery Phase Meter to Determine Internal Temperatures of Lithium-Ion Rechargeable Cells Under Charge and Discharge
    Publication number: 20120155507
    Abstract: Methods and systems to determine an internal temperature of a rechargeable lithium-ion cell based on a phase shift of the cell. Internal cell temperature may be determined with respect to an internal anode temperature and/or an internal cathode temperature. Internal anode temperature may be determined based on a phase shift of a frequency within a range of approximately 40 Hertz (Hz) to 500 Hz. Internal cathode temperature may be determined based on a phase shift of a frequency of up to approximately 30 Hz. A temperature sensor as disclosed herein may be powered by a monitored cell with relatively little impact on cell charge, may be electrically coupled to cell but housed physically separate from the cell, and/or may monitor multiple cells in a multiplex fashion. A rate of change in phase shift may be used to initiate pre-emptive action, without determining corresponding temperatures.
    Type: Application
    Filed: October 18, 2011
    Publication date: June 21, 2012
    Applicant: JOHNS HOPKINS UNIVERSITY
    Inventors: Rengaswamy Srinivasan, Michael H. Butler, Bliss G. Carkhuff, Terry E. Phillips, Jeremy D. Walker, Oscar M. Uy, Andrew C. Baisden