Abstract: An eco-friendly power source, such as a battery module provided for a transportation vehicle includes a first sub-module and a second sub-module disposed in a first direction, the first sub-module and the second sub-module respectively including a plurality of battery cells stacked in a second direction, which is perpendicular to the first direction, and a lower cover coupled to the first sub-module and the second sub-module. The first sub-module and the second sub-module are disposed to be rotationally symmetrical to each other about a central axis, which is perpendicular to both the first direction and the second direction.

Abstract: A lithium secondary battery according to an embodiment of the present invention includes an electrode assembly including a separation layer, and a plurality of cathodes and a plurality of anodes separated by the separation layer and repeatedly stacked, and a gas adsorption layer coated on a single surface of an outermost anode among the plurality of anodes.

Abstract: An eco-friendly power source such as a battery module is provided for a transportation vehicle, including: a first sub-module and a second sub-module respectively including a cell stack in which a plurality of battery cells are stacked; and a central wall disposed between the first sub-module and the second sub-module, wherein the central wall includes a first central wall facing the first sub-module and a second central wall facing the second sub-module, wherein the first central wall has a rotationary symmetrical shape of the second central wall around a first axis.

Abstract: A pouch-type secondary battery includes: an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; and a pouch case including a sealing portion sealed along an edge thereof to accommodate the electrode assembly therein, and a terrace portion formed to extend toward the sealing portion in which an electrode lead is disposed, wherein a notch portion at which a body of a perforator is seated is formed in the sealing portion to form a perforation portion on the terrace portion.

Abstract: A cathode active material for a lithium secondary battery includes a lithium metal oxide particle and a thio-based compound formed on at least portion of a surface of the lithium metal oxide particle. The thio-based compound has a double bond that contains a sulfur atom. Chemical stability of the lithium metal oxide particle may be improved and surface residues may be reduced by the thio-based compound.

Abstract: A battery module includes a plurality of secondary battery cells, a housing member accommodating a plurality of the secondary battery cells therein, and an insulating member disposed on an inner surface of the housing member, preventing flow of electrical current to the housing member, having a heat transfer function to discharge heat of the secondary battery cell externally, and formed to have a predetermined thickness.

Abstract: Provided is a battery module including a multilayered firewall capable of controlling a heat transfer phenomenon due to a battery fire. The battery module includes a plurality of secondary battery cells accommodated in a housing member, wherein a secondary battery cell among the plurality of battery cells includes an electrode assembly in which a plurality of negative electrodes and positive electrodes are alternately stacked with a separator interposed therebetween and a pouch case encasing the electrode assembly, wherein a multilayered firewall is interposed between the plurality of secondary battery cells, and the multilayered firewall includes a heat absorption layer and fireproof layers stacked on opposing surfaces of the heat absorption layer.

Abstract: A battery sub-packing unit includes at least one battery cell; and a case accommodating the at least one battery cell, wherein the case comprises an end panel on which an electrode tab of the at least one battery cell is fastened to extend into an external space, and having a lower end portion in which a sub-vent hole is formed for communication between the external space and an internal space in which the at least one battery cell is disposed.

Abstract: A secondary battery cell includes: a case in which an electrode assembly is accommodated; a cap plate assembly coupled to at least one side of the case; and a venting unit including a base coupled to one surface of the case and a notch portion formed on the base, and the notch portion includes: a first notch portion extending in a first direction; a second notch portion extending in a second direction intersecting the first direction; and a third notch portion extending in a third direction, parallel to a longitudinal direction of the base from both ends of the first notch portion and the second notch portion.

Abstract: The present disclosure relates to an anode for a secondary battery, a method of manufacturing the anode, and a lithium ion secondary battery including the anode. The anode includes an anode mixture layer on at least one surface of an anode current collector, with pores inside the anode mixture layer having a Z-tensor value of 0.33 or more. In addition, a method of manufacturing the anode and a lithium ion secondary battery including the anode are provided.

Abstract: A method for producing a secondary battery electrode, according to the present invention, comprises: a slicing step for producing an active material film by slicing an active material bulk; and a binding step for combining a current collector and the active material film. A method for producing a secondary battery electrode according to the present invention produces an active material film by slicing an active material bulk, which is a free-standing molded body or pellet, thus allowing binder-free active material film to be produced, and as no actual restrictions exist for the thickness of the active material film, thick active material film can be produced, and thus electrodes having high-loading and high composite density can be produced.

Abstract: A lithium secondary battery comprises a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separator interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a continuous concentration gradient in at least one region between a central portion and a surface portion. The second cathode active material particle includes a constant concentration composition.

Abstract: A secondary battery cell includes: a case in which an electrode assembly is accommodated; a cap plate assembly coupled to at least one side of the case; and a venting unit including a base coupled to one surface of the case and a notch portion formed on the base, and the notch portion includes: a first notch portion extending in a first direction, parallel to a longitudinal direction of the base; a second notch portion extending in a second direction, perpendicular to the first direction, from both ends of the first notch portion, respectively; and a third notch portion extending in the first direction from both ends of the second notch portion, respectively.

Abstract: Provided is a negative electrode active material for a secondary battery including a core-shell composite including: a core including a silicon oxide (SiOx, 0<x?2) and a metal silicate in at least a part of the silicon oxide; and a shell including a metal-substituted organic compound, wherein the metal of the metal silicate and the substituted metal of the organic compound are independent of each other, wherein each of the metal of the metal silicate and the substituted metal of the organic compound includes an alkali metal or an alkaline earth metal.

Abstract: A cathode active material for a lithium secondary battery includes a lithium-transition metal composite oxide particle having a lattice strain (?) of 0.18 or less, which is calculated by applying Williamson-Hall method defined by Equation 1 to XRD peaks measured through XRD analysis, and having an XRD peak intensity ratio of 8.9% or less, which is defined by Equation 2. By controlling the lattice strain and XRD peak intensity ratio of the lithium-transition metal composite oxide particle, a lithium secondary battery with improved life-span characteristics as well as output characteristics is provided.

Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a cathode active material particle having a specific concentration ratio, an anode; and a separation layer interposed between the cathode and the anode. The lithium secondary battery has improved formation discharge amount, formation discharge efficiency and power output.

Abstract: A battery module includes at least one battery cell; a first plate disposed on one side of the at least one battery cell to dissipate heat generated by the at least one battery cell externally; and a second plate disposed on the other side of the at least one battery cell to dissipate heat generated by the at least one battery cell externally, wherein an electrode lead of the at least one battery cell is disposed between the first plate and the second plate, and is disposed to be biased toward the first plate.

Abstract: A battery module is provided comprising a plurality of battery cells and a housing having an internal space in which the plurality of battery cells are accommodated. The housing is at least partially formed of a plate member which is connected with the internal space. The plate member forms a flame or gas path which in an event of a battery cell malfunction generating a flame or gas is configured to discharge the generated flame or gas externally of the housing.

Abstract: A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer formed on the cathode current collector. The cathode active material layer includes a cathode active material and a conductive material ID/IG is in a range from 0.5 to 1.25 in a Raman spectrum of the cathode active material layer. The cathode active material includes lithium metal oxide particles containing nickel and manganese and having a content of cobalt of less than 2 mol % among all elements except for lithium and oxygen.

Abstract: A cathode for a lithium secondary battery according to an embodiment of the present invention includes a cathode current collector, and a cathode active material layer on the cathode current collector. The cathode active material layer includes cathode active material particles. The cathode active material particles include first lithium metal oxide particles having a shape of a secondary particle in which a plurality of primary particles are aggregated, and second lithium metal oxide particles having a shape of a single particle. A closed pore ratio of the cathode active material layer is 5% or less.