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Optical waveguide methods for detecting internal faults in operating batteries

United States Patent

February 14, 2017
View the Complete Patent at the US Patent & Trademark Office
Light is transmitted from a light source through or from a separator of a battery cell and received by one or more light detectors. The light that is normally transmitted through the separator is scattered, absorbed, wavelength-shifted or otherwise distorted by an impending fault in the vicinity of or within the separator. The change in light due to the impending fault is measured by a detector and a signal from the detector is processed to identify the impending fault so that a warning can be generated indicative of the impending fault. In particular, the separator and a battery cell electrolyte can be selected to provide waveguide properties.
Saunders; James H. (Worthington, OH), Morrow; C. Alexander (Gahanna, OH), Risser; Steven M. (Reynoldsburg, OH), Spahr; Kevin B. (Columbus, OH)
Battelle Memorial Institute (Columbus, OH)
14/ 620,568
February 12, 2015
GOVERNMENT LICENSE RIGHTS Aspects of this invention were made with support from the United States (US) Government under Contract No. DE-AR0000272 awarded by the Advanced Research Projects Agency-Energy (ARPA-E). The US Government may have certain rights in the invention.