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Medical device having lithium-ion battery

  • US 7,641,992 B2
  • Filed: 10/29/2004
  • Issued: 01/05/2010
  • Est. Priority Date: 10/29/2004
  • Status: Active Grant
First Claim
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1. A medical device comprising:

  • a rechargeable lithium-ion battery for providing power to the medical device, the lithium-ion battery comprising;

    a positive electrode comprising a current collector and a first active material;

    a negative electrode comprising a current collector and a second active material; and

    an auxiliary electrode comprising a current collector and a third active material, the auxiliary electrode adapted for repeated electrical connection to the positive and negative electrodes, but the auxiliary electrode being connected to only one of the positive electrode and the negative electrode at any one point in time and when selectively connected;

    wherein the first active material, second active material, and third active material are configured to allow doping and undoping of lithium-ions; and

    wherein the third active material exhibits charging and discharging capacity below a corrosion potential of the current collector of the negative electrode and above a decomposition potential of the first active material.

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