Abstract: The present invention relates to a positive electrode active material having improved capacity characteristic and life cycle characteristic, and a method of preparing the same, and specifically, to a positive electrode active material for a lithium secondary battery, wherein the positive electrode active material comprises a compound represented by Formula 1 above and allowing reversible intercalation/deintercalation of lithium, and from a crystal structure analysis of the positive electrode active material by a Rietveld method in which space group R-3m is used in a crystal structure model on the basis of an X-ray diffraction analysis, the thickness of MO slab is 2.1275 ? or less, the thickness of inter slab is 2.59 ? or greater, and the cation mixing ratio between Li and Ni is 0.5% or less, and a method of preparing the same.

Abstract: An integrated circuit device includes a lower electrode, an upper electrode, and a dielectric layer structure between the lower electrode and the upper electrode, the dielectric layer structure including a first surface facing the lower electrode and a second surface facing the upper electrode. The dielectric layer structure includes a first dielectric layer including a first dielectric material and a plurality of grains extending from the first surface to the second surface and a second dielectric layer including a second dielectric material and surrounding a portion of a sidewall of each of the plurality of grains of the first dielectric layer in a level lower than the second surface. The second dielectric material includes a material having bandgap energy which is higher than bandgap energy of the first dielectric material.

Abstract: Provided is a pouch-type secondary battery that includes an electrode assembly equipped with an electrode tab, an electrode lead connected to the electrode tab, a pouch housing accommodating and sealing the electrode assembly such that the electrode lead is partially exposed, and first and second sealants within the pouch housing. The electrode lead includes a joint portion joined to the electrode tab, a terminal portion exposed to an outside of the pouch housing and a fuse portion between the joint portion and the terminal portion. The fuse portion includes a separating groove and a breaking portion connected to the separating groove for separating the terminal portion from the joint portion. The first sealant and the second sealant have shapes that are different from each other such that, when the pressure inside the secondary battery is increased, a stress applied to the pouch housing causes the breaking portion to break.

Abstract: The present disclosure provides an electrode lead that ensures safety of a secondary battery when gas is generated within the secondary battery. The electrode lead is included in a pouch-type secondary battery in which outer circumferential parts of a pouch casing are sealed and an electrode assembly is accommodated in a center part of the pouch casing.

Abstract: A pouch-type secondary battery includes an electrode assembly equipped with an electrode tab, an electrode lead connected to the tab, a pouch housing accommodating and sealing the electrode assembly such that the lead is exposed partly and equipped with a sealing zone at the edge thereof, a first sealant interposed between the top surface of the lead and the inner surface of the housing and a second sealant interposed between the lower surface of the lead and the inner surface of the housing. The lead includes a joint portion joined to the tab, a terminal portion exposed to the outside of the housing and a fuse portion therebetween. The fuse portion includes a separating groove separated from the sealing zone toward the joint portion and including at least a horizontal slit and a breaking portion connected to the separating groove for separating the terminal portion from the joint portion.

Abstract: Provided is a pouch-type secondary battery comprising an electrode assembly equipped with an electrode tab, an electrode lead connected to the electrode tab, a pouch housing accommodating and sealing the electrode assembly such that the electrode lead is exposed partly and equipped with a sealing zone at the edge thereof, a first sealant interposed between the top surface of the electrode lead and the inner surface of the pouch housing and a second sealant interposed between the lower surface of the electrode lead and the inner surface of the pouch housing, wherein the electrode lead includes a joint portion joined to the electrode tab, a terminal portion exposed to the outside of the pouch housing and a fuse portion between the joint portion and the terminal portion, the fuse portion includes a separating groove separated from the sealing zone toward the joint portion and including at least a horizontal slit which is in parallel to the width direction of the electrode lead and a breaking portion disposed mor

Abstract: The present disclosure provides an electrode lead that ensures safety of a secondary battery when gas is generated within the secondary battery. The electrode lead is included in a pouch-type secondary battery in which outer circumferential parts of a pouch casing are sealed and an electrode assembly is accommodated in a center part of the pouch casing.

Abstract: Provided is a pouch-type secondary battery that includes an electrode assembly equipped with an electrode tab, an electrode lead connected to the electrode tab, a pouch housing accommodating and sealing the electrode assembly such that the electrode lead is partially exposed, and first and second sealants within the pouch housing. The electrode lead includes a joint portion joined to the electrode tab, a terminal portion exposed to an outside of the pouch housing and a fuse portion between the joint portion and the terminal portion. The fuse portion includes a separating groove and a breaking portion connected to the separating groove for separating the terminal portion from the joint portion. The first sealant and the second sealant have shapes that are different from each other such that, when the pressure inside the secondary battery is increased, a stress applied to the pouch housing causes the breaking portion to break.

Abstract: The present invention relates to a battery temperature adjusting system including: a battery unit having a heating pad; a leading wire connected to the battery unit; and a current induction unit surrounding the leading wire, wherein the current induction unit is electrically connected to the heating pad. The battery temperature adjusting system according to the present invention generates the induced current by applying the current induction unit surrounding the leading wire connected to the battery unit, and increases the temperature of the battery unit by supplying the induced current to the heating pad, thereby obtaining a desired battery output in a low-temperature region even without the use of an external power source.

Abstract: Provided are a secondary battery, a battery module, and a battery pack, which have improved safety. Particularly, since a bulletproof material is disposed on the inside and/or the outside of an exterior part, even when a conductive needle-shaped member penetrates a secondary battery, heating, burning, discharge of evaporated electrolyte, and electrical contact between the needle-shaped member and an electrode can be prevented, thereby improving safety of the secondary battery, the battery module, and the battery pack.

Abstract: The present disclosure discloses an apparatus and method for sealing a pouch case that optimizes a sealing shape or structure of a sealing portion at an inner side of the pouch case to ensure insulation of a secondary battery. The apparatus for sealing a pouch case of a pouch-type secondary battery according to the present disclosure includes an upper compression jig to apply pressure to a sealing portion of the pouch case in a downward direction, and a lower compression jig to apply pressure to the sealing portion of the pouch case in an upward direction, and at least one of the upper compression jig and the lower compression jig applies the pressure to the pouch case at different depths at an inner side end and an outer side end.

Abstract: Provided is a novel structural electric device having improved safety. More particularly, provided is a novel structural electric device devised to resolve several issues regarding heat generation, ignition, and explosion, which may be caused by a sharp needle-shaped object penetrating an electric device.

Abstract: An electrode lead for electrically connecting an electrode assembly provided inside a case of a secondary battery with the outside of the case, according to the present invention, comprises: an inner lead which is inserted between sealing parts of the case and to which an electrode tab of the electrode assembly is attached, and which has a gas flow path so as to allow gas to flow between the inside and the outside of the case; and an external lead which is insertably disposed in the gas flow path, is electrically connected with the inner lead when inserted into the gas flow path, seals one end of the gas flow path, and is separated from the gas flow path so as to cut off electrical connection with the inner lead when the pressure of the gas flowing into the gas flow path is greater than or equal to the predetermined pressure.

Abstract: Provided are an electrode lead of a secondary battery where a protection layer for anti-corrosion is selectively formed at an electrode lead portion at the cell outside and a secondary battery including the same. Since a protection layer for anti-corrosion is selectively formed only on an electrode lead portion at the cell outside, the corrosion of the electrode lead may be prevented from an external environment and the resistance of a cell may be reduced simultaneously.

Abstract: An electrode lead for electrically connecting an electrode assembly provided inside a case of a secondary battery with the outside of the case, according to the present invention, comprises: an inner lead which is inserted between sealing parts of the case and to which an electrode tab of the electrode assembly is attached, and which has a gas flow path so as to allow gas to flow between the inside and the outside of the case; and an external lead which is insertably disposed in the gas flow path, is electrically connected with the inner lead when inserted into the gas flow path, seals one end of the gas flow path, and is separated from the gas flow path so as to cut off electrical connection with the inner lead when the pressure of the gas flowing into the gas flow path is greater than or equal to the predetermined pressure.

Abstract: The present disclosure discloses an apparatus and method for sealing a pouch case that optimizes a sealing shape or structure of a sealing portion at an inner side of the pouch case to ensure insulation of a secondary battery. The apparatus for sealing a pouch case of a pouch-type secondary battery according to the present disclosure includes an upper compression jig to apply pressure to a sealing portion of the pouch case in a downward direction, and a lower compression jig to apply pressure to the sealing portion of the pouch case in an upward direction, and at least one of the upper compression jig and the lower compression jig applies the pressure to the pouch case at different depths at an inner side end and an outer side end.

Abstract: The present invention relates to a battery temperature adjusting system including: a battery unit having a heating pad; a leading wire connected to the battery unit; and a current induction unit surrounding the leading wire, wherein the current induction unit is electrically connected to the heating pad. The battery temperature adjusting system according to the present invention generates the induced current by applying the current induction unit surrounding the leading wire connected to the battery unit, and increases the temperature of the battery unit by supplying the induced current to the heating pad, thereby obtaining a desired battery output in a low-temperature region even without the use of an external power source.

Abstract: The present invention relates to a battery temperature adjusting system including: a battery unit having a heating pad; a leading wire connected to the battery unit; and a current induction unit surrounding the leading wire, wherein the current induction unit is electrically connected to the heating pad. The battery temperature adjusting system according to the present invention generates the induced current by applying the current induction unit surrounding the leading wire connected to the battery unit, and increases the temperature of the battery unit by supplying the induced current to the heating pad, thereby obtaining a desired battery output in a low-temperature region even without the use of an external power source.

Abstract: Provided are an electrode lead of a secondary battery where a protection layer for anti-corrosion is selectively formed at an electrode lead portion at the cell outside and a secondary battery including the same. Since a protection layer for anti-corrosion is selectively formed only on an electrode lead portion at the cell outside, the corrosion of the electrode lead may be prevented from an external environment and the resistance of a cell may be reduced simultaneously.

Abstract: Provided are a secondary battery, a battery module, and a battery pack, which have improved safety. Particularly, since a bulletproof material is disposed on the inside and/or the outside of an exterior part, even when a conductive needle-shaped member penetrates a secondary battery, heating, burning, discharge of evaporated electrolyte, and electrical contact between the needle-shaped member and an electrode can be prevented, thereby improving safety of the secondary battery, the battery module, and the battery pack.