Cylindrical lithium secondary battery
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United States of America Patent
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Aug 16, 2022
Grant Date -
May 30, 2019
app pub date -
Feb 6, 2018
filing date -
Feb 9, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A cylindrical lithium secondary battery according to the present invention can reduce gas explosion by preventing gas concentration from being concentrated only on the upper top cap vent by increasing the gas spouting passage through which the inner gas of the can is spouted by forming a rupture portion of a material different from that of the can member on a part of the cylindrical can member, and when the inside or outside of the battery is exposed to a high temperature, by making, a shape-based alloy member, which causes cracking of the can member by deformation, included a part of the can member, the gas is discharged through the can vent by the cracking of the can member to prevent explosion before the tap cap safety vent operates by the internal air pressure, and ignition that may be caused by heating by internal or external heat may be prevented.
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