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Related Experiment Videos

Lithium/silver vanadium oxide batteries for implantable defibrillators.

E S Takeuchi1, P J Quattrini, W Greatbatch

  • 1Wilson Greatbatch Ltd., Clarence, New York 14031.

Pacing and Clinical Electrophysiology : PACE
|November 1, 1988
PubMed
Summary

Lithium/silver vanadium oxide (SVO) batteries offer reliable power for implantable cardiac defibrillators. These SVO batteries exhibit low self-discharge rates and a voltage decrease indicating charge status, ideal for medical devices.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Biomedical Engineering

Background:

  • Lithium/silver vanadium oxide (SVO) battery technology has been developed since 1980.
  • High-rate batteries for implantable cardiac defibrillators (ICDs) have been a focus since 1984.
  • The SVO cathode is derived from silver vanadium oxide, a bronze produced via thermal decomposition of vanadium oxide and silver nitrate.

Purpose of the Study:

  • To detail the development and characteristics of Li/SVO batteries for implantable applications.
  • To present specific Li/SVO battery models (e.g., 8512, 8615) and their specifications.
  • To evaluate the suitability of Li/SVO batteries for ICDs through rigorous testing.

Main Methods:

  • Development of Li/SVO battery chemistry with lithium anode and SVO cathode.

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  • Fabrication and characterization of various Li/SVO cell models.
  • Environmental and abuse testing to assess suitability for implantable devices.

    • Main Results:

    • Li/SVO batteries deliver high current pulses (up to 2.0 amps) from a microampere background.
    • Demonstrated low annual self-discharge rates of less than 2%.
    • Observed a characteristic voltage decrease with depth of discharge, serving as a state-of-charge indicator.

    Conclusions:

    • Li/SVO batteries possess characteristics suitable for implantable cardiac defibrillator applications.
    • The self-discharge rate and state-of-charge indication are advantageous for long-term medical device reliability.
    • Rigorous testing confirms the safety and performance of these batteries in demanding environments.