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Title: Strain measurement based battery testing

Abstract

A method and system for strain-based estimation of the state of health of a battery, from an initial state to an aged state, is provided. A strain gauge is applied to the battery. A first strain measurement is performed on the battery, using the strain gauge, at a selected charge capacity of the battery and at the initial state of the battery. A second strain measurement is performed on the battery, using the strain gauge, at the selected charge capacity of the battery and at the aged state of the battery. The capacity degradation of the battery is estimated as the difference between the first and second strain measurements divided by the first strain measurement.

Inventors:
; ; ; ;
Publication Date:
Research Org.:
SOUTHWEST RESEARCH INSTITUTE, San Antonio, TX (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1358222
Patent Number(s):
9,660,299
Application Number:
14/102,197
Assignee:
SOUTHWEST RESEARCH INSTITUTE ARPA-E
DOE Contract Number:
AR0000277
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Dec 10
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Xu, Jeff Qiang, Steiber, Joe, Wall, Craig M., Smith, Robert, and Ng, Cheuk. Strain measurement based battery testing. United States: N. p., 2017. Web.
Xu, Jeff Qiang, Steiber, Joe, Wall, Craig M., Smith, Robert, & Ng, Cheuk. Strain measurement based battery testing. United States.
Xu, Jeff Qiang, Steiber, Joe, Wall, Craig M., Smith, Robert, and Ng, Cheuk. Tue . "Strain measurement based battery testing". United States. doi:. https://www.osti.gov/servlets/purl/1358222.
@article{osti_1358222,
title = {Strain measurement based battery testing},
author = {Xu, Jeff Qiang and Steiber, Joe and Wall, Craig M. and Smith, Robert and Ng, Cheuk},
abstractNote = {A method and system for strain-based estimation of the state of health of a battery, from an initial state to an aged state, is provided. A strain gauge is applied to the battery. A first strain measurement is performed on the battery, using the strain gauge, at a selected charge capacity of the battery and at the initial state of the battery. A second strain measurement is performed on the battery, using the strain gauge, at the selected charge capacity of the battery and at the aged state of the battery. The capacity degradation of the battery is estimated as the difference between the first and second strain measurements divided by the first strain measurement.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 23 00:00:00 EDT 2017},
month = {Tue May 23 00:00:00 EDT 2017}
}

Patent:

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  • This patent relates to a device for measuring the biaxial strain of a test specimen utilizing a coaxial resonant cavity, made to resonate in at least two different modes by electromagnetic energy supplied to the cavity. A first mode is dependent upon the diametric dimensions of the cavity. The cavity is formed of a hollow, sensor body whose electrically conductive inner walls, one of which is movable, function as the outer conductor of the coaxial cavity, and which is adapted to receive the test specimen through the movable wall which is rigidly coupled to the test specimen. The outer surfacemore » of the test specimen, being electrically conductive, functions as the inner conductor of the coaxial resonator. Dimensional variations in the test specimen result in a variation in the dimensions of the coaxial cavity and therefore in the frequency at which the cavity will resonate in each of the modes. These frequency variations can be monitored to provide a measure of biaxial strain associated with the object. (auth)« less
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