Lg Chem, Ltd

Lg Energy Solution, Ltd.

U Jin Yoon

Duk Hyun Ryu

Ha Young Heo

Kwan Hee Lee

Seung Won Park

A secondary battery according to the present invention, in which an electrode assembly is built in a cylindrical can, a top cap connected to a positive electrode of the electrode assembly is coupled to an upper end of the can, and the can is connected to a negative electrode. The secondary battery includes a cooling member which receives heat generated in the electrode assembly to release the heat and is coupled to a lower portion of the can, wherein the cooling member has a plurality of cooling pins disposed parallel to each other.

Secondary battery

Disclosed herein is a cap assembly loaded on an open upper end of a metal battery can of a cylindrical secondary battery. The cap assembly includes a top cap located at the uppermost end of the cap assembly, a safety vent located under the top cap and electrically connected to the top cap via a safety vent for discharging gas, a current interrupt device configured such that a portion of the upper surface of the current interrupt device is connected to the safety vent and a portion of the lower surface of the current interrupt device is connected to an electrode lead of an electrode assembly, and a current interrupt device (CID) gasket coupled to the current interrupt device so as to wrap an outer circumferential part of the current interrupt device in order to secure the electrical insulation property of the current interrupt device.

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Daejeon, South Korea

U Jin Yoon