| 摘要 |
A lithium secondary battery including: an electrode assembly including a center pin inside of the electrode assembly; a can including the electrode assembly; and a cap assembly coupled to a side of the can. At least one end of the center pin includes a deforming end to deform due to an impact power caused by a collision of the deforming end with an inner surface of the can and/or the cap assembly, preventing the center pin from protruding to an outside of the can and/or the cap assembly. Accordingly, the lithium secondary battery is safer by preventing a center pin from protruding when the cylindrical lithium secondary battery explodes due to an increase in internal pressure.
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