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:
Mar. 22, 2011
Filed:
May. 09, 2005
Tom Eriksson, Sandviken, SE;
Tom Eriksson, Sandviken, SE;
St. Jude Medical AB, Jarfalla, SE;
Abstract
In a method and apparatus for determining the replacement time of an electric battery in an implantable medical device, the battery being a hybrid battery with a combination of at least two electrode materials, one of which having better properties for high current pulsing and the other of which being a high energy density material, an electrical pulse of a predetermined duration and predetermined amplitude is drawn from the battery. The pulse amplitude significantly exceeds a base current drawn from the battery. The difference between voltages measured across the battery terminals before the pulse is emitted and at an end of the pulse is determined. The battery replacement time is determined from the voltage difference according to a predetermined criterion.