×

Rapid charging technique for lithium ion batteries

  • US 5,670,862 A
  • Filed: 03/12/1996
  • Issued: 09/23/1997
  • Est. Priority Date: 03/12/1996
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for charging a battery comprising the steps of:

  • providing charging current to an external terminal of a battery through a first impedance, said first impedance being approximately equal to an electrical series resistance between said external terminal and an electrode internal to said battery;

    detecting a voltage drop across said first impedance;

    generating a first voltage representative of a voltage at said electrode internal to said battery, said first voltage being based on said voltage drop and said voltage at said external terminal; and

    applying said first voltage to a sense circuit for comparing said first voltage to a preset voltage to control said charging current to maintain said first voltage at approximately said preset voltage.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×