Packaged battery, stacked battery assembly, and film-covered battery

  • US 8,722,241 B2
  • Filed: 01/09/2008
  • Issued: 05/13/2014
  • Est. Priority Date: 02/21/2007
  • Status: Active Grant
First Claim
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1. A stacked battery assembly comprised of a plurality of stacked film-covered batteries, wherein:

  • said film-covered battery comprises;

    a battery element; and

    exterior films which form a sealed space which fits said battery element therein,said sealed space includes a housing section which houses said battery element therein, and a pocket communicating with said housing section to expand due to an increase in the inner pressure of said sealed space,said pocket includes a safety valve configured to operate due to expansion of said pocket,said pocket is positioned on a side orthogonal to the stacking direction in said film-covered battery, andsaid pocket is disposed at a position that is, in planar view, different from other pockets in adjacent ones of said film-covered batteries.

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