×

Lithium-ion battery

  • US 7,794,869 B2
  • Filed: 07/29/2009
  • Issued: 09/14/2010
  • Est. Priority Date: 10/29/2004
  • Status: Active Grant
First Claim
Patent Images

1. A battery comprising:

  • a positive electrode comprisinga current collector anda first active material;

    a negative electrode comprisinga current collector anda second active material; and

    an auxiliary electrode comprisinga current collector anda third active material;

    wherein the auxiliary electrode is configured for a selective electrical connection to the negative electrode; and

    at least one of a switch and a diode configured to implement the selective electrical connection as a function of at least one of the voltage difference between the positive and negative electrodes, the voltage difference between the positive and auxiliary electrodes, and the voltage difference between the negative and auxiliary electrodes;

    wherein the first active material, the second active material, and the 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.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×