Safety device for use in a lithium ion battery
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United States of America Patent
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Mar 26, 2013
Grant Date -
Jan 27, 2011
app pub date -
Jul 22, 2010
filing date -
Jul 24, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A safety device for use in a lithium ion battery includes a top cover defining a central hole and a number of peripheral holes set around the central hole, a rupture plate fixed to the bottom surface of the top cover and sealing the peripheral holes and the central hole, and a vent plate defining an air hole electrically connected to the rupture plate via an electrical connection point. Other part of the rupture plate is electrically insulated from the vent plate via an insulating gasket. The central hole and the peripheral holes around the central hole can prevent the deformed rupture plate from blocking the air vent passage of the lithium ion battery to improve the safety performance of the lithium ion battery.
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