×

Method for screening lithium ion battery

  • US 10,345,388 B2
  • Filed: 06/08/2017
  • Issued: 07/09/2019
  • Est. Priority Date: 12/08/2014
  • Status: Active Grant
First Claim
Patent Images

1. A method for screening a lithium ion battery, the method comprising:

  • galvanostatic discharging a plurality of lithium ion batteries to an inflection point voltage at an inflection point of a discharge curve at a first constant current I1;

    resting the plurality of lithium ion batteries for a first rest time T1 to raise an open circuit voltage of the plurality of lithium ion batteries to U1, wherein U1 is greater than the inflection point voltage;

    galvanostatic discharging the plurality of lithium ion batteries to the inflection point voltage at a second constant current I2, wherein I2«

    I1; and

    resting the plurality of lithium ion batteries for a second rest time T2 and screening the plurality of lithium ion batteries based on a self-discharge of the plurality of lithium ion batteries.

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