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Battery pack having a heat insulating layer

  • US 8,592,067 B2
  • Filed: 06/07/2010
  • Issued: 11/26/2013
  • Est. Priority Date: 06/08/2009
  • Status: Active Grant
First Claim
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1. A battery pack comprising:

  • a plurality of secondary batteries;

    a housing for containing the secondary batteries; and

    at least one heat insulating layer for separating the secondary batteries from one another,wherein the at least one heat insulating layer includes a foam material which foams at a first predetermined temperature of 110°

    C. or more and less than 200°

    C., andthe thickness of the heat insulating layer increases when the foam material foams,at least one partition is disposed so as to separate the secondary batteries from one another, andthe at least one partition includes a sealed pouch, and the heat insulating layer is contained in the sealed pouch.

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