Battery thermal event detection system using an optical fiber
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United States of America Patent
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Jan 10, 2012
Grant Date -
Jun 3, 2010
app pub date -
May 28, 2009
filing date -
May 28, 2009
priority date (Note) -
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Abstract
A method and apparatus is provided for determining when a battery, or one or more batteries within a battery pack, undergoes an undesired thermal event such as thermal runaway. The system uses an optical fiber mounted in close proximity to, or in contact with, an external surface of the battery or batteries to be monitored. A source of light is optically coupled to the input facet of the optical fiber and a detector optically coupled to the output facet of the optical fiber. Battery health is determined by monitoring the light transmitted through the optical fiber.
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