Top cap assembly for secondary battery
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United States of America Patent
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-
Dec 11, 2018
Grant Date -
Apr 7, 2016
app pub date -
May 6, 2015
filing date -
Oct 2, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a top cap assembly for a cylindrical type secondary battery, including a CID short-circuiting member, which interrupts an electric current when a high voltage is generated in the cylindrical type secondary battery, a safety vent connected to an upper part of the CID short-circuiting member and including a plurality of notches, which are broken when a voltage equal to or greater than an allowable voltage of the CID short-circuiting member is generated, to discharge gas from the cylindrical type secondary battery, a top cap connected to the safety vent and disposed on the uppermost end of an upper opening part of the cylindrical type secondary battery, a gasket surrounding and sealing an outer circumferential surface of the CID short-circuiting member, and a heat resistant member preventing heat transfer between the gasket and the safety vent.
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