×

Systems and methods for determining battery state-of-health

  • US 9,244,132 B2
  • Filed: 08/17/2012
  • Issued: 01/26/2016
  • Est. Priority Date: 09/12/2011
  • Status: Active Grant
First Claim
Patent Images

1. A method of calculating a state-of-health (SOH) of a chemical battery including individual or parallel-grouped cells, the method comprising:

  • charging the battery to a maximum charge potential of the battery;

    after waiting a predetermined period of time after completion of the charging, determining an open-circuit voltage (OCV) of the battery; and

    based on the determined OCV of the battery, determining the SOH of the battery, wherein the SOH of the battery is determined by calculating a state-of-charge (SOC) of the battery, after the predetermined period of time, using the following formula;

    SOC=A×

    OCV2+B×

    OCV−

    C, wherein the SOC represents the SOH of the battery, A and B represent the slope of the response, and C represents the OCV expected at 0% SOC.

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