CAP ASSEMBLY FOR USE IN LITHIUM ION BATTERIES
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United States of America Patent
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Issued Date -
Nov 18, 2010
app pub date -
May 11, 2010
filing date -
May 15, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided is a cap assembly for use in cylindrical lithium ion batteries. The cap assembly includes an insulating gasket defining a through hole therein, a rupture plate positioned in the through hole, a vent plate soldered on and electrically connected to the rupture plate, a current interrupt device positioned on the rupture plate, and an end cap assembled on the current interrupt device. The current interrupt device can cut off the current path when the battery discharges at a high discharge rate, so as to improve the safety performance of the lithium ion battery.
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