The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2014
Filed:
Jun. 11, 2010
John L. Morrison, Butte, MT (US);
William H. Morrison, Manchester, CT (US);
Jon P. Christophersen, Idaho Falls, ID (US);
Chester G. Motloch, Idaho Falls, ID (US);
John L. Morrison, Butte, MT (US);
William H. Morrison, Manchester, CT (US);
Jon P. Christophersen, Idaho Falls, ID (US);
Chester G. Motloch, Idaho Falls, ID (US);
Battelle Energy Alliance, LLC, Idaho Falls, ID (US);
Qualtech Systems, Inc., East Hartford, CT (US);
Montana Tech of the University of Montana, Butte, MT (US);
Abstract
Electrochemical Impedance Spectrum data are used to predict pulse performance of an energy storage device. The impedance spectrum may be obtained in-situ. A simulation waveform includes a pulse wave with a period greater than or equal to the lowest frequency used in the impedance measurement. Fourier series coefficients of the pulse train can be obtained. The number of harmonic constituents in the Fourier series are selected so as to appropriately resolve the response, but the maximum frequency should be less than or equal to the highest frequency used in the impedance measurement. Using a current pulse as an example, the Fourier coefficients of the pulse are multiplied by the impedance spectrum at corresponding frequencies to obtain Fourier coefficients of the voltage response to the desired pulse. The Fourier coefficients of the response are then summed and reassembled to obtain the overall time domain estimate of the voltage using the Fourier series analysis.