Abstract: The present disclosure relates to a positive electrode active material for a secondary battery, the positive electrode active material being a lithium composite transition metal oxide particle including nickel (Ni) and cobalt (Co) and including at least one of manganese (Mn) and aluminum (Al), wherein the lithium composite transition metal oxide particle includes 60 mol % or greater of the nickel (Ni) in all metals excluding lithium, a doping element is doped on the lithium composite transition metal oxide particle, and the particle intensity of the lithium composite transition metal oxide particle is 210 MPa to 290 MPa.

Abstract: A seat for a vehicle includes support links enabling a rotating motion and a sliding motion between a seat frame and seat rails, the support links being mounted so that the seat may be rotated in the forward and rearward directions as in a seesaw motion about a shaft of the vehicle in a width direction of the vehicle, so as to easily implement a facing mode posture, in which passengers sit facing each other, a relaxed comfort posture, etc.

Abstract: The present invention relates to a secondary battery capable of improving venting pressure distribution. A secondary battery including an electrode assembly, a can member that accommodates the electrode assembly, and a top cap assembly that covers an opening of the can member. The top cap assembly includes a top cap positioned at the uppermost portion and a safety vent part positioned below the top cap. The safety vent part includes a rupture portion that is ruptured when an internal pressure within the can member equals or exceeds a predetermined pressure, a rupture notch portion that defines a boundary of the rupture portion, and a bending notch portion which is spaced apart from the rupture notch portion toward a center of the rupture portion on a bottom surface of the rupture portion, and the bending notch portion is bent when the internal pressure within the can member increases.

Abstract: A cylindrical secondary battery may have an insulation layer formed in a region in which the top cap and the first gasket are coupled to each other. The insulation layer may include a ceramic material and a binder. The secondary battery is designed so that, when an external electrical conductive object is electrically connected directly to a positive electrode and a negative electrode of the secondary battery, an electrode tab of the secondary battery is broken as quickly as possible.

Abstract: To solve the above problem, a method for manufacturing a top insulator configured to be inserted into a case of a secondary battery, according to an embodiment of the present invention includes: preparing a top insulator fabric by applying a silicone rubber to at least one surface of a glass fiber fabric formed by crossing weft yarns and warp yarns of glass fiber raw yarns; and punching the top insulator fabric.

Abstract: A gasket for a secondary battery includes a base resin and a rust inhibitor, wherein the base resin includes polybutylene terephthalate and the rust inhibitor includes an anti-rust material and a polymer resin, and the base resin and the polymer resin are different.

Abstract: The present invention relates to a battery cell. The battery cell comprises: an electrode assembly provided with an electrode tab; a case which accommodates the electrode assembly and of which at least a portion of an edge is sealed to provide a sealing surface; an electrode lead coupled to the electrode tab and led out of the case; a lead film disposed on each of top and bottom surfaces of the lead electrode disposed on the sealing surface of the case and coupled together with the sealing surface; and a main gas discharge tube disposed in the case and having one end buried in the lead film.

Abstract: The present invention relates to a washer for a secondary battery including a film layer and an adhesive layer disposed on at least one surface of the film layer, wherein the adhesive layer includes an adhesive component and an indicator component, and the indicator component is fat-soluble, a secondary battery including the same, and a method for manufacturing the washer.

Abstract: To solve the above problem, a method for manufacturing a top insulator configured to be inserted into a case of a secondary battery, according to an embodiment of the present invention includes: preparing a top insulator fabric by applying a silicone rubber to at least one surface of a glass fiber fabric formed by crossing weft yarns and warp yarns of glass fiber raw yams; and punching the top insulator fabric.

Abstract: To solve the above problem, a top insulator for a case of a secondary battery, according to an embodiment of the present invention includes: a glass fiber including crossed weft yarns and warp yarns of raw yarns of the glass fiber; and silicone rubber on at least one surface of the glass fiber.

Abstract: A rust inhibitor for a gasket, a gasket for a secondary battery including the same, and a secondary battery are provided. The rust inhibitor includes an anti-rust material and a polymer resin, wherein the polymer resin includes at least one of polyethylene or a copolymer which includes 2 or more derived units selected from the group consisting of an ethylene-derived unit, a propylene-derived unit, a butylene terephthalate-derived unit, an ethylene terephthalate-derived unit, and a methyl acrylate-derived unit.

Abstract: A secondary battery may include: an electrode assembly in which a positive electrode, a negative electrode, and a separator are wound or stacked; an insulator on at least one of an upper portion and a lower portion of the electrode assembly; and a battery case configured to accommodate the electrode assembly, the insulator, and an electrolyte and sealed by a cap assembly, wherein the insulator includes: a peripheral portion having a disk ring shape and made of a rigid material; and a central portion extending inward from an inner circumferential surface of the peripheral portion and including a textile fabric having high-temperature resistance.

Abstract: Disclosed are a method for manufacturing a secondary battery and an auxiliary case configured for use during manufacturing of the secondary battery. A gas generated in the secondary battery may be discharged to prevent an electrode assembly and the secondary battery from increasing in thickness, and an electrolyte may be efficiently injected into the secondary battery. A method for manufacturing a secondary battery includes: an accommodation step of accommodating an electrode assembly into a battery case; a connection step of connecting an auxiliary case to the battery case, the auxiliary case having an inner space therein; an injection step of injecting an electrolyte into the battery case and the auxiliary case; an electrolyte supply step of moving some of the electrolyte from the auxiliary case into the battery case; and a gas supply step of moving a gas from the battery case into the auxiliary case.

Abstract: The present invention relates to a secondary battery, in which a sealing property is improved, and a method for manufacturing the same. The secondary battery includes: a can member having an opening; a top cap assembly sealing the opening; a gasket insulating the opening from the top cap assembly; and a hot melt applied to a surface of the gasket, wherein the hot melt has fluidity and viscosity at a predetermined temperature or more and is hardened at a temperature less than the predetermined temperature.

Abstract: Provided are a lithium secondary battery, which includes an electrode assembly, a battery case accommodating the electrode assembly, a surface layer comprising an engineering plastic located on the outer side of the battery case, and lead terminals connected with the electrode assembly and drawn out of the battery case, and a method of fabricating the same.

Abstract: The disclosed secondary battery is capable of preventing a short-circuit pressure at which the safety vent is ruptured from being reduced due to deformation of the safety vent during assembly of the battery. The secondary battery of the present invention includes a can member accommodating an electrode assembly and a top cap assembly covering an opening of the can member. A safety vent is provided in the top cap assembly to discharge a gas when an inner pressure of the can member increases, wherein the safety vent includes a main body and a bending unit, in which an outer edge of the main body is bent, and wherein a buffering space is defined between the bending unit and the main body.

Abstract: The present invention relates to a secondary battery capable of improving venting pressure distribution. A secondary battery including an electrode assembly, a can member that accommodates the electrode assembly, and a top cap assembly that covers an opening of the can member. The top cap assembly includes a top cap positioned at the uppermost portion and a safety vent part positioned below the top cap. The safety vent part includes a rupture portion that is ruptured when an internal pressure within the can member equals or exceeds a predetermined pressure, a rupture notch portion that defines a boundary of the rupture portion, and a bending notch portion which is spaced apart from the rupture notch portion toward a center of the rupture portion on a bottom surface of the rupture portion, and the bending notch portion is bent when the internal pressure within the can member increases.

Abstract: A secondary battery according to the present invention comprises an electrode assembly in which an electrode and a separator are combined and staked, a can configured to accommodate the electrode assembly therein, and an insulation coating part applied to an inner surface of the can, wherein the insulation coating part has a coating thickness of 1 ?m to 15 ?m.

Abstract: To solve the above-described objects, a method for manufacturing a secondary battery according to an embodiment of the present invention comprises: manufacturing an electrode assembly in which electrodes and a separator are alternately stacked; inserting the electrode assembly into a battery case through an opening; covering the opening of the battery case; injecting an electrolyte into the battery case through an injection hole formed in the battery case; closing the injection hole; performing a pre-formation process; and applying external force to a switch of a gas discharge device formed on one surface of the battery case, thereby linearly moving a gasket of the gas discharge device and opening a gas discharge hole, such that a first gas generated in the battery case is discharged to an outside of the battery case during the performing of the pre-formation process.

Abstract: A rust inhibitor for a gasket, a gasket for a secondary battery including the same, and a secondary battery are provided. The rust inhibitor includes an anti-rust material and a polymer resin, wherein the polymer resin includes at least one of polyethylene or a copolymer which includes 2 or more derived units selected from the group consisting of an ethylene-derived unit, a propylene-derived unit, a butylene terephthalate-derived unit, an ethylene terephthalate-derived unit, and a methyl acrylate-derived unit.