Systems and related methods for determining self-discharge currents and internal shorts in energy storage cells
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.
- Issue Date:
- OSTI Identifier:
- 1464607
- Assignee:
- Battelle Energy Alliance, LLC (Idaho Falls, ID) INL
- Patent Number(s):
- 10,036,779
- Application Number:
- 14/954,446
- Contract Number:
- AC07-05ID14517
- Resource Relation:
- Patent File Date: 2015 Nov 30
- Research Org:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Org:
- USDOE
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE
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