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

Sazhin, Sergiy V.; Dufek, Eric J.; Gering, Kevin L.

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

Patent · Tue Jul 31 00:00:00 EDT 2018

OSTI ID:1464607

Sazhin, Sergiy V.; Dufek, Eric J.; Gering, Kevin L.

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.

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Research Organization:: Idaho National Laboratory (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC07-05ID14517

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

Patent Number(s):: 10,036,779

Application Number:: 14/954,446

OSTI ID:: 1464607

Resource Relation:: Patent File Date: 2015 Nov 30

Country of Publication:: United States

Language:: English

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