Samsung Sdi Co., Inc.

Ukseung Chemical Co., Ltd.

Jun-Won Kang

Jin-Sung Kim

Chang-Seob Kim

Su-Jin Han

Jong-Seob Kim

Ju-Hyung Kim

Min-Ho Song

Soo-Youn Maeng

Min-Ho Gong

Hak-Soo Kim

A stacked-type electrode assembly is disclosed. In one embodiment, the electrode assembly includes at least one first electrode plate including i) a first active material coating portion formed on a first base material and coated with a first active material and ii) a first non-coated portion, wherein the first electrode plate has a first width and a first length greater than the first width, and wherein the first electrode plate has upper and lower portions formed in the direction of the first length. The assembly also includes at least one second electrode plate including i) a second active material coated portion formed on a second base material and coated with a second active material and ii) a second non-coated portion, wherein the second electrode plate has a second width and a second length greater than the second width.

Secondary battery having first and second non-coated portions

A jelly-roll type battery unit includes a first electrode plate having a first electrode current collector with a first electrode tab, and a first electrode active material layer on a surface of the first electrode current collector; a second electrode plate having a second electrode current collector with a second electrode tab, and a second electrode active material layer on a surface of the second electrode current collector; and a separator interposed between the first electrode plate and the second electrode plate. The electrode tab is incorporated into the electrode current collector in an area of either first or second electrode plate where the corresponding electrode active material layer is not coated. The electrode tab is cut widthwise with respect to the electrode current collector from a center area of the electrode current collector and folded, and an insulating tape is adhered to either surface of the electrode tab.

Jelly-roll type battery unit and winding method thereof and lithium secondary battery comprising the same

A lithium secondary battery includes a can made of a conductive metal. The can houses an electrode unit having positive and negative electrode plates with a separator interposed therebetween with an electrolytic solution. An upper opening of the can is sealed by a cap assembly. A bottom plate is welded to an outer bottom surface of the can, and a lead plate having a first end welded to the outer bottom surface of the can and a second end connected to a safety device so that the can is electrically connected to the safety device.

Lithium secondary battery with safety device

An electrode unit and a secondary battery having the electrode unit include a first electrode plate having a first electrode uncoated portion on at least one side of a first electrode collector coated with at least a first electrode active material, a second electrode plate having a second electrode uncoated portion on at least one side of a second electrode collector coated with at least a second electrode active material, and a separator interposed between the first electrode plate and the second electrode plate, wherein an insulating separator having at least two folds is located between the first electrode uncoated portion and the second electrode uncoated portion.

Electrode unit and secondary battery using the same

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Cheonan, South Korea

Jun-Won Kang