Film-clad battery and method of producing film-clad battery
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United States of America Patent
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Apr 15, 2014
Grant Date -
Jan 11, 2007
app pub date -
Sep 30, 2004
filing date -
Oct 7, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A joint section where covering films 2a, 2b of film-covered battery 1 are heat-sealed together is formed with flat surface 6′ having thickness t1 and groove 6 having thickness t2. Groove 6 serves to reduce the projection area of film-covered battery 1 by folding side 2c toward receiving section 2a1 with groove 6 serving as an edge, and groove 6 is made thinner than flat surface 6′ by Δt=t1−t2. Therefore, the length of covering films 2a, 2b produced on outer side 6a is shortened as compared with the case of folding the portion that has thickness t1.
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