The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2009
Filed:
Jan. 28, 2005
Rengaswamy Srinivasan, Ellicott City, MD (US);
Hassan M. Saffarian, Silver Spring, MD (US);
Terry E. Phillips, Ellicott City, MD (US);
Paul R. Zarriello, Catonsville, MD (US);
Bliss G. Carkhuff, Laurel, MD (US);
Subhas Chalasani, Troy, MI (US);
Rengaswamy Srinivasan, Ellicott City, MD (US);
Hassan M. Saffarian, Silver Spring, MD (US);
Terry E. Phillips, Ellicott City, MD (US);
Paul R. Zarriello, Catonsville, MD (US);
Bliss G. Carkhuff, Laurel, MD (US);
Subhas Chalasani, Troy, MI (US);
The Johns Hopkins University, Baltimore, MD (US);
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.