Abstract: A rechargeable battery includes an electrode assembly; a can housing the electrode assembly and having an open end, a bottom surface substantially opposite to the open end, a first planar surface and a second planar surface, wherein the first planar surface and the second planar surface each have a first fracture portion that facilitates buckling of the can under compression, wherein a first axis is defined extending from the bottom surface to the open end, and wherein the first fracture portion extends along a second axis in a direction substantially perpendicular to the first axis; and a cap plate sealing the open end of the can.

Abstract: A rechargeable battery includes an electrode assembly; a can housing the electrode assembly and having an open end, a bottom surface substantially opposite to the open end, a first planar surface and a second planar surface, wherein the first planar surface and the second planar surface each have a first fracture portion that facilitates buckling of the can under compression, wherein a first axis is defined extending from the bottom surface to the open end, and wherein the first fracture portion extends along a second axis in a direction substantially perpendicular to the first axis; and a cap plate sealing the open end of the can.

Abstract: A secondary battery includes an electrode unit having a first electrode plate, a second electrode plate, a separator interposed therebetween, and first and second electrode tabs respectively extending from the first and second electrode plates, a can adapted to accommodate the electrode unit and an electrolytic solution, and a cap plate adapted to seal the can and having an electrolytic solution inlet, wherein the electrolytic solution inlet has an area on one surface of the cap plate different from that on another surface of the cap plate.

Abstract: 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.

Abstract: 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.

Abstract: A secondary battery includes an electrode unit having a first electrode plate, a second electrode plate, a separator interposed therebetween, and first and second electrode tabs respectively extending from the first and second electrode plates, a can adapted to accommodate the electrode unit and an electrolytic solution, and a cap plate adapted to seal the can and having an electrolytic solution inlet, wherein the electrolytic solution inlet has an area on one surface of the cap plate different from that on another surface of the cap plate.

Abstract: 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.

Abstract: A separator for a lithium battery having an elastic modulus of 2.0 kgf/mm2 or less, and a lithium battery employing the separator and a method of manufacture thereof are provided.

Abstract: 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.