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Hazard mitigation through gas flow communication between battery packs

  • US 9,548,616 B2
  • Filed: 02/14/2011
  • Issued: 01/17/2017
  • Est. Priority Date: 08/10/2010
  • Status: Active Grant
First Claim
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1. A hazard mitigation system, comprising:

  • a power source, comprising;

    a first battery pack contained within a first battery pack enclosure and comprised of a plurality of metal-air cells, said first battery pack enclosure further comprised of at least a first air inlet, an air outlet, and a second air inlet;

    a second battery pack contained within a second battery pack enclosure and comprised of a plurality of non-metal-air cells, said second battery pack enclosure further comprised of a hot gas outlet;

    an air passageway coupling said hot gas outlet of said second battery pack enclosure to said second air inlet of said first battery pack enclosure; and

    a first valve for controlling air flow out of said second battery pack enclosure and through said hot gas outlet and through said air passageway and through said second air inlet and through at least a portion of said plurality of metal-air cells within said first battery pack enclosure prior to being expelled out of said first battery pack enclosure via said air outlet, said first valve having at least a first position that permits air flow and a second position that prevents air flow, wherein during normal operation of said power source said first valve is in said second position, and wherein said first valve is configured to switch from said second position to said first position upon the occurrence of a thermal event within said second battery pack to permit effluent generated during said thermal event to pass through said hot gas outlet and through said air passageway and through said second air inlet and through at least a portion of said plurality of metal-air cells prior to being expelled out of said first battery pack enclosure via said air outlet.

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