| 摘要 |
A low profile seal assembly for sealing the open end of a container of an electrochemical cell to provide controlled pressure venting, while effectively preventing resealing of the open end of the cell. An electrochemical cell has a container with a closed bottom and an open top end, positive and negative electrodes disposed in the container, a separator disposed between the positive and negative electrodes, and an electrolyte disposed in the container. The cell further includes a seal member disposed in the open top end of the container for closing the open top end of the container. The seal member has a stress concentrator formed in the seal member for providing pressure relief to vent high pressure gases. A cover is disposed in the open end of the container and substantially covers the seal member, and the cover has at least one opening formed therein. A standoff member is located between a top surface of the seal member and a bottom surface of the cover for keeping at least a portion of the seal member at a distance from the cover to prevent resealing of the seal member when the seal member vents.
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