Lithium secondary battery
AssigneeSamsung SDI Co., Ltd.
InventorKwan-Sic Chun
Life of this patent
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Abstract
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.
Claims24
A lithium secondary battery comprising:
- an electrode assembly comprising a center pin inside of the electrode assembly;
- a can housing the electrode assembly;
- and
- a cap assembly coupled to a side of the can,
- wherein at least one end of the center pin comprises 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;
- and
- wherein the deforming end has a diameter that increases along a direction away from the middle of the center pin,
- wherein the deforming end has a plurality of splits with slits therebetween along a lengthwise direction of the center pin, and at least one split of the plurality of splits is bent radially outward.
A lithium secondary battery comprising:
- an electrode assembly comprising a center pin inside of the electrode assembly;
- a can housing the electrode assembly;
- and
- a cap assembly coupled to a side of the can,
- wherein at least one end of the center pin comprises 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;
- wherein the deforming end has a plurality of splits with slits therebetween along a lengthwise direction of the center pin, and at least one split of the plurality of splits is bent radially inward.
Dependencies are inferred from the claim text.