| 摘要 |
An electrochemical cell (10) is provided having a container (12) with a closed bottom (14) and an open top end (16), positive and negative electrodes disposed in the container, a separator (24) disposed between the positive and negative electrodes (26, 22), and an electrolyte disposed in the container. The cell further includes a seal member (32) 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 (40), preferably formed as a thinned section 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 stand-off member (42, 52) 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. |
