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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.:

US 9488697 B1

PDFFull Text
Date of Patent:
Nov. 08, 2016

Filed:

Mar. 13, 2014

Fractional depletion estimation for battery condition metrics

Applicant:

Crown Equipment Corporation, New Bremen, OH (US);

Inventor:

John R. Harman, Versailles, OH (US);

Assignee:

Crown Equipment Corporation, New Bremen, OH (US);

Attorney:

Stevens & Showalter LLP

Primary Examiner:

Drew A Dunn

Assistant Examiner:

Jerry D Robbins

Int. Cl.
CPC ...
G01R 31/36 (2006.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01); B60L 3/00 (2006.01); B60L 3/04 (2006.01); B60L 3/12 (2006.01); B60L 11/18 (2006.01);
U.S. Cl.
CPC ...
G01R 31/3679 (2013.01); B60L 3/0046 (2013.01); B60L 3/04 (2013.01); B60L 3/12 (2013.01); B60L 11/1857 (2013.01); B60L 11/1861 (2013.01); H01M 10/425 (2013.01); H01M 10/48 (2013.01); B60L 2200/36 (2013.01); B60L 2200/42 (2013.01); B60L 2240/545 (2013.01); B60L 2240/547 (2013.01); B60L 2240/549 (2013.01); B60L 2240/70 (2013.01); B60L 2240/80 (2013.01); B60L 2250/10 (2013.01); B60L 2260/44 (2013.01); G01R 31/3613 (2013.01); G01R 31/3651 (2013.01); G01R 31/3689 (2013.01); H01M 2010/4271 (2013.01); H01M 2010/4278 (2013.01); Y02T 10/7005 (2013.01); Y02T 10/705 (2013.01); Y02T 10/7016 (2013.01); Y02T 10/7044 (2013.01); Y02T 10/7291 (2013.01); Y02T 90/16 (2013.01);
Abstract

Evaluation of a battery state comprises transforming a time based history of the load on the battery into a spectral representation of that history in a load domain, e.g., the current domain. The method also comprises comparing the spectral representation to an expected battery capability for the load represented by each line in the spectra and calculating the fraction of the expected capability used at each spectral line. The method still further comprises aggregating the calculated fractions into a total fraction that represents the estimated fraction of the expected battery capability associated with that particular time history.

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