Please download the dossier by clicking on the dossier button x
×

Energy storage cell impedance measuring apparatus, methods and related systems

  • US 9,851,414 B2
  • Filed: 07/01/2015
  • Issued: 12/26/2017
  • Est. Priority Date: 12/21/2004
  • Status: Active Grant
First Claim
Patent Images

1. An energy storage cell impedance measuring device, comprising:

  • a sum-of-sinusoids (SOS) current excitation circuit including differential current sources configured to isolate a ground terminal of the differential current sources from a positive terminal and a negative terminal of an energy storage cell, the SOS current excitation circuit configured to apply an SOS signal through the energy storage cell, the SOS signal including a sum of a plurality of sinusoidal current signals, each of the plurality of sinusoidal current signals oscillating at a different one of a plurality of different frequencies; and

    control circuitry configured to operably couple to the SOS current excitation circuit, the positive terminal, and the negative terminal, the control circuitry comprising;

    an SOS control module configured to cause the SOS current excitation circuit to produce the SOS signal;

    at least one signal measuring module configured to measure electrical signals on the positive terminal and the negative terminal of the energy storage cell; and

    an impedance computation module configured to use the electrical signals measured by the at least one signal measuring module to compute an impedance of the energy storage cell for each frequency of the SOS signal.

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