Circuits and methods for impedance determination using active measurement cancelation

Title: Circuits and methods for impedance determination using active measurement cancelation

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Abstract

A delta signal and opposite delta signal are generated such that a sum of the two signals is substantially zero. The delta signal is applied across a first set of electrochemical cells. The opposite delta signal is applied across a second set of electrochemical cells series connected to the first set. A first held voltage is established as the voltage across the first set. A second held voltage is established as the voltage across the second set. A first delta signal is added to the first held voltage and applied to the first set. A second delta signal is added to the second held voltage and applied to the second set. The current responses due to the added delta voltages travel only into the set associated with its delta voltage. The delta voltages and the current responses are used to calculate the impedances of their associated cells.

Inventors:: Jamison, David K.

Issue Date:: 2016-12-13

Research Org.:: Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1335819

Patent Number(s):: 9,519,031

Application Number:: 14/108,068

Assignee:: Battelle Energy Alliance, LLC (Idaho Falls, ID) INL

DOE Contract Number:: AC07-05ID14517

Resource Type:: Patent

Resource Relation:: Patent File Date: 2013 Dec 16

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE

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                    Jamison, David K. Circuits and methods for impedance determination using active measurement cancelation.  United States: N. p., 2016. 
        Web.

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                    Jamison, David K. Circuits and methods for impedance determination using active measurement cancelation.  United States.

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                    Jamison, David K. Tue .  
        "Circuits and methods for impedance determination using active measurement cancelation".  United States.  https://www.osti.gov/servlets/purl/1335819.

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@article{osti_1335819,

  title        = {Circuits and methods for impedance determination using active measurement cancelation},

  author       = {Jamison, David K.},

  abstractNote = {A delta signal and opposite delta signal are generated such that a sum of the two signals is substantially zero. The delta signal is applied across a first set of electrochemical cells. The opposite delta signal is applied across a second set of electrochemical cells series connected to the first set. A first held voltage is established as the voltage across the first set. A second held voltage is established as the voltage across the second set. A first delta signal is added to the first held voltage and applied to the first set. A second delta signal is added to the second held voltage and applied to the second set. The current responses due to the added delta voltages travel only into the set associated with its delta voltage. The delta voltages and the current responses are used to calculate the impedances of their associated cells.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2016},

  month        = {12}

}

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