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Title: Systems and related methods for determining self-discharge currents and internal shorts in energy storage cells

Abstract

Systems and methods for determining self-discharge currents in an energy storage cell and detecting internal shorts are disclosed. A system includes a DC voltage source configured to provide a constant test voltage selected to be less than an open-circuit voltage of an energy storage cell to the energy storage cell. The system also includes a current measuring device operably coupled between the DC voltage source and the energy storage cell, and control circuitry operably coupled to the current measuring device. A method includes applying the constant test voltage, and measuring the test current flowing between the DC voltage source and the energy storage cell until after the test current switches from a negative current to a positive current. The method also includes determining a self-discharge current of the energy storage cell by analyzing the measured test current with computational models that capture physical processes tied to the test methods.

Inventors:
; ;
Issue Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1464607
Patent Number(s):
10,036,779
Application Number:
14/954,446
Assignee:
Battelle Energy Alliance, LLC (Idaho Falls, ID)
DOE Contract Number:  
AC07-05ID14517
Resource Type:
Patent
Resource Relation:
Patent File Date: 2015 Nov 30
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Sazhin, Sergiy V., Dufek, Eric J., and Gering, Kevin L. Systems and related methods for determining self-discharge currents and internal shorts in energy storage cells. United States: N. p., 2018. Web.
Sazhin, Sergiy V., Dufek, Eric J., & Gering, Kevin L. Systems and related methods for determining self-discharge currents and internal shorts in energy storage cells. United States.
Sazhin, Sergiy V., Dufek, Eric J., and Gering, Kevin L. Tue . "Systems and related methods for determining self-discharge currents and internal shorts in energy storage cells". United States. https://www.osti.gov/servlets/purl/1464607.
@article{osti_1464607,
title = {Systems and related methods for determining self-discharge currents and internal shorts in energy storage cells},
author = {Sazhin, Sergiy V. and Dufek, Eric J. and Gering, Kevin L.},
abstractNote = {Systems and methods for determining self-discharge currents in an energy storage cell and detecting internal shorts are disclosed. A system includes a DC voltage source configured to provide a constant test voltage selected to be less than an open-circuit voltage of an energy storage cell to the energy storage cell. The system also includes a current measuring device operably coupled between the DC voltage source and the energy storage cell, and control circuitry operably coupled to the current measuring device. A method includes applying the constant test voltage, and measuring the test current flowing between the DC voltage source and the energy storage cell until after the test current switches from a negative current to a positive current. The method also includes determining a self-discharge current of the energy storage cell by analyzing the measured test current with computational models that capture physical processes tied to the test methods.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {7}
}

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