Patent ID: 6936379
Filing Date: 2005-08-30
Classification: A61N,H01M,Y02E

Abstract:
1. An implantable medical device, which comprises: a) a housing; b) a control circuitry contained inside the housing to control functioning of the medical device; c) an electrochemical cell contained inside the housing for powering the control circuitry, the cell comprising: d) a conductor for connecting the medical device to a body intended to be assisted by the medical device; e) wherein the cell's discharge capacity (A) from an Elective Replacement Indicator voltage to an end-of-life (End of Life) voltage and a theoretical capacity (B) of the cell are determinable; f) wherein the efficiencies of the first and second cathode active materials as (C) and (D), respectively, in terms of deliverable capacity from the A Elective Replacement Indicator voltage to the End of Life voltage are determinable; and g) wherein the cell's deliverable capacity from the Elective Replacement Indicator voltage to the End of Life voltage is determinable by the control circuitry using the equation: A/B=[C×a ratio of a first theoretical capacity of the first cathode active material:a second theoretical capacity of the second cathode active material+D]/(the ratio of the first theoretical capacity:the second theoretical capacity+1).