Abstract: The present invention relates to a lithium secondary battery comprising: a current collector comprising a structure in a fabric form in which fiber bundles are cross-woven, wherein each of the fiber bundles is formed of sets of fiber yarns and each of the fiber yarns includes a polymer fiber and a metal layer surrounding the polymer fiber; and an electrode including an active material layer disposed on at least one surface of the current collector.

Abstract: The present invention relates to a lithium secondary battery comprising: a current collector comprising a structure in a fabric form in which fiber bundles are cross-woven, wherein each of the fiber bundles is formed of sets of fiber yarns and each of the fiber yarns includes a polymer fiber and a metal layer surrounding the polymer fiber; and an electrode including an active material layer disposed on at least one surface of the current collector.

Abstract: The purpose of the present invention is to provide an electrode assembly which is prevented from being damaged due to electrode plate expansion during charging and discharging and thus has improved stability. According to the present invention, a guide line for guiding a portion to be welded in consideration of the expansion rate of an electrode plate is provided in an electrode tab, and thus there is an advantage in that damage due to expansion of the electrode plate during repeated charging and discharging can be prevented.

Abstract: The present disclosure relates to a rechargeable battery including an electrode assembly that includes a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode, a first electrode tab that is electrically connected with the first electrode, and includes at least one first bent portion, a second electrode tab that is electrically connected with the second electrode, and includes at least one second bent portion, and exterior member that receives the electrode assembly, and a reinforcement member that is disposed in the first exterior member, while being disposed adjacent to at least one of the first electrode tab and the second electrode tab.

Abstract: The present disclosure relates to an outer case for a flexible rechargeable battery, including a first resin layer configured to include a first patterned area, a moisture barrier layer disposed on the first resin layer to include a second patterned area, a second resin layer disposed on the moisture barrier layer to include a third patterned area, and a stress relaxation layer configured to cover the third patterned area.

Abstract: The present disclosure relates to a stacked electrode assembly and a flexible rechargeable battery including the same, including a first electrode, a second electrode stacked on one surface or both surfaces of the first electrode, and a separator disposed between the first electrode and the second electrode, wherein the separator has a continuous sheet shape, is bent in a first direction to surround the first electrode and in a second direction as an opposite direction to the first direction to surround the second electrode, and a bending end region of the separator includes a plurality of patterns.

Abstract: The present disclosure relates to a rechargeable battery including a cell assembly including a plurality of unit cells disposed to be separated by a predetermined interval, a casing member receiving the cell assembly, a first connection part connecting the plurality of unit cells, and a second connection part disposed parallel to the first connection part and connecting the plurality of unit cells, wherein each of the plurality of unit cells includes a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode.

Abstract: The present disclosure relates to an outer case for a flexible rechargeable battery, including a first resin layer configured to include a first patterned area, a moisture barrier layer disposed on the first resin layer to include a second patterned area, a second resin layer disposed on the moisture barrier layer to include a third patterned area, and a stress relaxation layer configured to cover the third patterned area.

Abstract: The present disclosure relates to a rechargeable battery including a first electrode including a first coating part and a first uncoated part disposed adjacent to the first coating part, a second electrode including a second coating part and a second uncoated part disposed adjacent to the second coating part, a separator interposed between the first electrode and the second electrode, a first electrode tab electrically connected to the first electrode; and a second electrode tab electrically connected to the second electrode, wherein at least one among the first uncoated part, the second uncoated part, the first electrode tab, and the second electrode tab includes a stress buffering part.

Abstract: A rechargeable lithium battery includes a metal-containing foam current collector, and an active mass that fills in the metal-containing foam current collector, the active mass including an active material. The electrode includes a central region and a surface region. The central region corresponds to a ±5% upper and lower area with a reference to a central thickness line of the electrode. A volume ratio of the metal and the active material in the central region is different from a volume ratio of the metal and the active material in the surface region.

Abstract: An electrode assembly and a rechargeable battery including the same are provided. An electrode assembly for a rechargeable battery includes: a first electrode including a first coating part and a first uncoated region at at least one side of the first coating part; a second electrode including a second coating part and a second uncoated region at at least one side of the second coating part; a separator between the first electrode and the second electrode; and at least one of a first stress buffering part on at least a partial region of the first uncoated region and a second stress buffering part on at least a partial region of the second uncoated region, the at least one of the first stress buffering part and the second stress buffering part being configured as a film including an ethylene propylene copolymer, a hydrogenated hydrocarbon polymer, and polyethylene.

Abstract: A flexible rechargeable battery includes a first conductive substrate, a second conductive substrate, and a seal. The first conductive substrate includes a first protrusion. The second conductive substrate faces the first conductive substrate and includes a second protrusion. The seal is located along at least one edge of the first conductive substrate and the second conductive substrate, and includes at least one sealing metal layer and at least one sealing resin layer.

Abstract: The present invention relates to a band assembly including a first outer connecting portion and a second outer connecting portion disposed to face each other, wherein the first outer connecting portion includes a first fastening hole and the second outer connecting portion includes a third fastening hole, an inner connecting portion disposed between the first outer connecting portion and the second outer connecting portion, wherein the inner connecting portion includes a second fastening hole that corresponds to the first fastening hole and the third fastening hole, and a rechargeable battery inserted into the first fastening hole, the second fastening hole, and the third fastening hole to connect the first outer connecting portion, the inner connecting portion, and the second outer connecting portion.

Abstract: A pouch-type rechargeable battery according to one or more exemplary embodiments includes: an electrode assembly; an exterior material receiving the electrode assembly; and a sealing portion arranged at an edge of the exterior material, and including at least one metal particle and a resin surrounding the at least one metal particle, and an area ratio of the at least one metal particle and the resin in a cross-section of the sealing portion cut along a direction that is perpendicular to a lengthwise direction of the sealing portion is from 1:99 to 6:4.

Abstract: The present invention relates to a lithium secondary battery comprising: a current collector comprising a structure in a fabric form in which fiber bundles are cross-woven, wherein each of the fiber bundles is formed of sets of fiber yarns and each of the fiber yarns includes a polymer fiber and a metal layer surrounding the polymer fiber; and an electrode including an active material layer disposed on at least one surface of the current collector.

Abstract: The present disclosure relates to a rechargeable battery including an electrode assembly that includes a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode, a first electrode tab that is electrically connected with the first electrode, and includes at least one first bent portion, a second electrode tab that is electrically connected with the second electrode, and includes at least one second bent portion, and exterior member that receives the electrode assembly, and a reinforcement member that is disposed in the first exterior member, while being disposed adjacent to at least one of the first electrode tab and the second electrode tab.

Abstract: The present disclosure relates to a rechargeable battery including a cell assembly including a plurality of unit cells disposed to be separated by a predetermined interval, a casing member receiving the cell assembly, a first connection part connecting the plurality of unit cells, and a second connection part disposed parallel to the first connection part and connecting the plurality of unit cells, wherein each of the plurality of unit cells includes a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode.

Abstract: The present disclosure relates to a stacked electrode assembly and a flexible rechargeable battery including the same, including a first electrode, a second electrode stacked on one surface or both surfaces of the first electrode, and a separator disposed between the first electrode and the second electrode, wherein the separator has a continuous sheet shape, is bent in a first direction to surround the first electrode and in a second direction as an opposite direction to the first direction to surround the second electrode, and a bending end region of the separator includes a plurality of patterns.

Abstract: The present invention relates to a band assembly including a first outer connecting portion and a second outer connecting portion disposed to face each other, wherein the first outer connecting portion includes a first fastening hole and the second outer connecting portion includes a third fastening hole, an inner connecting portion disposed between the first outer connecting portion and the second outer connecting portion, wherein the inner connecting portion includes a second fastening hole that corresponds to the first fastening hole and the third fastening hole, and a rechargeable battery inserted into the first fastening hole, the second fastening hole, and the third fastening hole to connect the first outer connecting portion, the inner connecting portion, and the second outer connecting portion.

Abstract: An electrode assembly and a rechargeable battery including the same are provided. An electrode assembly for a rechargeable battery includes: a first electrode including a first coating part and a first uncoated region at at least one side of the first coating part; a second electrode including a second coating part and a second uncoated region at at least one side of the second coating part; a separator between the first electrode and the second electrode; and at least one of a first stress buffering part on at least a partial region of the first uncoated region and a second stress buffering part on at least a partial region of the second uncoated region, the at least one of the first stress buffering part and the second stress buffering part being configured as a film including an ethylene propylene copolymer, a hydrogenated hydrocarbon polymer, and polyethylene.