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Optical waveguide methods for detecting internal faults in operating batteries

  • US 9,570,781 B2
  • Filed: 02/12/2015
  • Issued: 02/14/2017
  • Est. Priority Date: 08/10/2012
  • Status: Active Grant
First Claim
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1. A battery structure for monitoring development of impending faults of a battery cell, the battery structure comprising:

  • a first electrode and a second electrode;

    a battery cell separator formed of a light transmitting material that has light transmission characteristics that are a function of a state of impending faults of the battery cell;

    wherein the battery cell separator comprises;

    a core section,a first cladding section between the core section and the first electrode, anda second cladding section between the core section and the second electrode;

    an electrolyte capable of passing through portions of the battery cell separator;

    a light source, in optical communication with a first edge of the battery cell separator, for transmitting light, having a predetermined wavelength, into the battery cell separator; and

    a light detector, in optical communication with a second edge of the battery cell separator, for receiving light transmitted through the battery cell separator,wherein a fault state of a portion of the battery cell associated with the light detector can be determined based on the received light.

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