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Method of calibrating impedance measurements of a battery

  • US 10,436,873 B1
  • Filed: 04/25/2017
  • Issued: 10/08/2019
  • Est. Priority Date: 04/25/2016
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • performing a shunt measurement with one non-inductive shunt value using an excitation signal including a root mean squared current and a frequency range;

    capturing a response time record of said one non-inductive shunt under test;

    transforming said response time record to a frequency domain;

    normalizing said response time record transformed to said frequency domain to said one non-inductive shunt value; and

    recording said response time record transformed to said frequency domain and normalized to said non-inductive shunt value as a calibration record;

    exciting a device under test using said excitation signal including said at least one RMS current level and said frequency range;

    capturing a response time record of said device under test;

    transforming said time record of said device under test to said frequency domain;

    applying said calibration record to said response time record of said device under test; and

    generating a measurement of said device under test.

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