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PULSE METHOD TO REDUCE IRREVERSIBLE CAPACITY FADE IN IMPLANTABLE SECONDARY BATTERIES

IP.com Disclosure Number: IPCOM000020255D
Publication Date: 2003-Nov-06

Publishing Venue

The IP.com Prior Art Database

Abstract

A system and method of battery discharge within an implantable medical device interferes with degradation reactions, thereby reducing the rate of capacity fade associated with a rechargeable battery. More particularly, the battery is drained through the use of dynamically applied current pulses at a relatively high rate for a short time so as to disrupt the degradation reactions that occur in such a battery. The frequency and amplitude of such pulses provides the net average current drain needed to power the implant device for its intended application. By not allowing the degradation reactions to reach steady-state, and/or by dispersing the degradation byproducts before they can irreversibly contaminate electrode interface layers, the rate of capacity fade is reduced.