Patent ID: 6696196
Filing Date: 2004-02-24
Classification: H01M

Abstract:
A recloseable container for batteries, having walls defining an interior which, when said container is closed, is subjected to at least one of a first and a second pressure, said first pressure much lower than said second pressure, said container comprising:a highly rigid panel at least partially forming one of the container walls and being formed of a single material layer, said panel having an interior surface exposed to said interior of said container, and an opposite, exterior surface, one of said interior and exterior panel surfaces provided with a groove having first and second elongate groove segments which extend smoothly along their respective lengths, said first and second groove segments laterally spaced, and a third elongate groove segment extending between and connected to said first and second groove segments, said panel having a first portion which lies on one side of said third groove segment, and a second portion which lies on the opposite side of said third groove segment, said first and second panel portions located between said first and second groove segments and integrally connected across said third groove segment, whereby said first and second panel portions become disconnected across said third groove segment in response to said container interior being at said second container interior pressure, whereby said panel is in a ruptured state.