Samsung Sdi Co., Inc.

Hyo-Rim Bak

Hae-Kwon Yoon

Jin-Bum Kim

Wan-Mook Lim

Myoung-Han Ryu

June-Hyoung Park

A negative electrode for a rechargeable lithium battery includes a negative current collector; a negative active material layer on the negative current collector; and a negative electrode tab on an uncoated region of the negative current collector, the uncoated region not having a negative active material coated thereon, wherein the negative electrode tab has a three-layered structure of a nickel layer-copper layer-nickel layer. A rechargeable lithium battery includes the negative electrode.

Negative electrode for rechargeable lithium battery and rechargeable lithium battery including same

A center pin for a secondary battery and a secondary battery having the same, which optimizes a void volume of the secondary battery. The center pin is inserted into an electrode assembly of the secondary battery. The center pin has a longitudinal hole and includes a sealing member to seal a portion of the hole. The sealing member can include walls disposed within the center pin, to seal the portion of the hole. The sealing member can include a second center pin, which is inserted into the hole, to seal the portion of the hole.

Center pin for secondary battery and secondary battery having the same

A rechargeable battery according to an embodiment of the present invention includes: an electrode assembly; a battery case accommodating the electrode assembly; and a cap assembly comprising: a cap plate comprising a top portion and at least one opening; and a vent member comprising two or more notches and a supporting portion, wherein the vent member is configured to break at the two or more notches and bend along two or more lines adjacent to the supporting portion.

Rechargeable battery

A secondary battery that includes a cylindrical can, an electrode assembly arranged in a jelly-role configuration within the cylindrical can and having a core extending about an axis thereof and a hollow center pin arranged within the core of the electrode assembly and having an inner diameter and an outer diameter, the outer diameter forming ones of a pair of radial lengths diametrically opposite from each other, each of said pair of radial lengths extending from the outer diameter of the center pin to an external surface of the core, wherein the sum of the pair of radial lengths is in the range of 5% to 54% of the inner diameter of the center pin.

Cylindrical secondary battery

A cylindrical secondary battery including an electrode assembly including a positive electrode having a positive electrode active material layer containing lithium carbonate (LiCO), a negative electrode including a negative electrode active material layer, and a separator separating the positive electrode from the negative electrode, a can housing the electrode assembly, a cap assembly disposed on the can, and an electrolyte injected into the can. A content of the lithium carbonate (LiCO) is in the range of 1.0 to 1.5 wt % of the total weight of the positive electrode active material layer, a content of the electrolyte is in the range of 10.8 to 11.93 wt % of the total weight of a bare cell, and an operating pressure for interrupting current by the cap assembly is in the range of 7 to 9 kgf/cm.

Cylindrical secondary battery responsive to operating pressure for interrupting current

An electrode assembly includes a positive electrode including a positive electrode active material; a negative electrode including a negative electrode active material; and a separator separating the positive electrode and the negative electrode from each other, and the separator including a porous layer formed by a combination of a barium titanate (BaTiO) and a binder.

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Yongin-si, South Korea

Hyo-Rim Bak