Abstract: This application relates to a cordless power tool system including a set of cordless power tools, a set of rechargeable and removable battery packs, and a set of battery pack chargers.

Abstract: A secondary battery includes an exterior body housing the electrode body, an external terminal provided outside a sealing plate sealing an opening of the exterior body, a connection member provided inside the sealing plate and connected to the external terminal, an insulating member provided between the sealing plate and the connection member, and a current collector disposed inside the sealing plate and connected to the connection member and a tab group including a plurality of current collector tabs extending from the electrode body. At least some of the current collector tabs of the tab group have a projecting portion projecting from the current collector in a longitudinal direction of the sealing plate. The insulating member has an extending portion at least extending between the projecting portion and the sealing plate along the longitudinal direction of the sealing plate.

Abstract: A sintering aid mixture for sintering solid-state ion conductors, electrode materials, or the like for solid-state batteries is provided. The mixture includes at least one sol-gel precursor and/or at least one sol-gel direct precursor produced from at least one sol-gel precursor.

Abstract: A positive electrode active material, and a positive electrode and a lithium secondary battery including the same are disclosed herein. In some embodiments, a positive electrode active material includes a lithium composite transition metal oxide containing nickel, cobalt, and manganese and having a nickel content for 60 mol % or more, based on metals (M) excluding lithium, and is in the form of single particles having an average particle diameter (D50) of 1 to 10 ?m, wherein a 100-nm region extending from the surface toward the center of a single particle has crystal structures of a Fd3M and a Fm3m space group, and a phase ratio is 0.2 to 0.7, which is a ratio of a first portion of a maximum straight length of the 100-nm region occupied by the crystal structure of the Fd3M space group to a second portion occupied by the crystal structure of the Fm3m space group.

Abstract: A negative electrode active material for a rechargeable battery of the present invention includes a silicon composite composed of a silicon compound and at least one carbon material of graphite, non-graphitizable carbon, and soft carbon, a self-assembled monolayer which covers the surface of the silicon composite and has amino groups, and a carbon compound that is bonded to the self-assembled monolayer via the amino groups and contains carbon atoms as a main component.

Abstract: A separator, comprising a substrate and a coating provided on at least one surface of the substrate are provided. In some embodiments, the coating comprises inorganic particles and organic particles, the organic particles comprise first organic particles and second organic particles both embedded in the inorganic particles and forming protrusions on the surface of the coating; the first organic particles are secondary particles, and the number of the first organic particles in the coating is denoted as A; the second organic particles are primary particles and the number of the second organic particles in the coating is denoted as B; with the separator satisfying: 0.05?A/B<1. The present application also relates to a method for preparing the separator, as well as a secondary battery comprising the separator, a battery module, a battery pack and a device.

Abstract: An electrolyzer system includes an anticorrosive, conductive material including a first oxide having oxygen vacancies and a formula (Ia): MgTi2O5-? (Ia), where ? is any number between 0 and 3 including a fractional part denoting the oxygen vacancies; and a second oxide having a formula (II): TiaOb (II), where 1<=a<=20 and 1<=b<=30, optionally including a fractional part, the first and second oxides of formulas (Ia) and (II) forming a polycrystalline matrix within the electrolyzer system.

Abstract: In a battery pack having a housing, battery modules composed of a plurality of battery cells, acquisition units equipped with slave antennas, and a monitoring device equipped with a parent antenna, the monitoring device and the acquisition units perform wireless communication to obtain battery information such as a state of change of each battery cell. A radio wave absorption part is formed on at least one of surfaces of the housing and an inside part of the housing. The radio wave absorption part absorbs a part of radio waves emitted from the parent antenna and the slave antennas.

Abstract: A battery module includes a plurality of battery cells having electrode terminals respectively at one end and the other end thereof and having a vent unit opened to discharge gas to the outside when an internal pressure increases over a predetermined level; a cell frame having an accommodation space for accommodating the plurality of battery cells and have a plurality of exposure holes opened so that the gas discharged from the battery cell moves to the outside; a screen member fixed to the cell frame to seal the exposure hole and configured to open a region thereof corresponding to the exposure hole by a gas pressure when gas is discharged from the vent unit of the battery cell; and a protection plate configured to fix the screen member to the cell frame and have a plurality of communication holes located corresponding to the exposure holes.

Abstract: A solid electrolyte for solid-state batteries comprises a phosphorous-free solid electrolyte having a cubic argyrodite structure. The solid electrolyte has a composition according to the molecular formula: Li6+xMxSb1?yS5?zR, where x=0 to 0.7; y=0 to 0.7 and z=0 to 0.7, wherein the (semi-) metal comprises M=Si, Sn, W and the halogen comprises R=I1, Cl1, Brz, Br1 and further wherein, in a case where R=I1, M=W and x>0. Furthermore, a production method is described.

Abstract: A busbar module includes: a busbar including an upper plate and a lower plate overlapping with the upper plate; an electrode lead positioned between the upper plate and the lower plate; and a connecting part disposed between the upper plate and the electrode lead to electrically connect the upper plate and the electrode lead, wherein a through hole is formed in the lower plate, and the connecting part is disposed at a position corresponding to the through hole.

Abstract: An electrolytic solution includes an organic solvent, an electrolyte, and an additive. The additive includes a first compound represented by Formula 1, where R1 is selected from one of a single bond, substituted or unsubstituted alkoxy, C1-C6 alkylene, and C2-C6 alkenyl; R2 and R3 each are independently selected from one of substituted or unsubstituted alkoxy, C1-C6 alkylene, and C2-C6 alkenyl; and R4 is B or P. Since the first compound includes an N-containing group that may be combined with a protonic acid in the electrolytic solution, the electrolytic solution have good stability; moreover, the cycle performance of a lithium secondary battery is improved.

Abstract: A solid electrolyte according to the present disclosure has a composition represented by MgxZry(POz)2 (0<x?3.5, 0?y<1.5, and 3?z?4.25), and includes an amorphous part. The composition may be represented by Mgx(POz)2 (3?x?3.5 and 3?z?4.25). The composition may be represented by MgxZry(POz)2 (0<x<3.5, 0<y<1.5, and 3?z?4.25).

Abstract: An embodiment anode for an all-solid-state battery includes an anode current collector, and a coating layer disposed on the anode current collector, wherein the coating layer is a thin film including at least one metal selected from the group consisting of alkaline earth metals, Group 4 to 9 transition metals, Group 13 metals, or combinations thereof.

Abstract: The present disclosure relates to a battery module cooling structure which uniformly cools heat generated in a battery module, and a cooling block includes a first cooling module positioned at any one portion of upper or lower portions of a battery module and a second cooling module positioned at the other portion of upper or lower portions of the battery module.

Abstract: A solid ion conductor including a garnet-type oxide represented by LiAM1BLaCM2DZrEM3FM4GOHXI (Formula 1), a solid electrolyte including the solid ion conductor, an electrochemical device including the ion conductor, and a method of preparing the ion conductor are disclosed. In Formula 1, M1 is a monovalent cation, a divalent cation, a trivalent cation, or a combination thereof, M2 is a monovalent cation, a divalent cation, a trivalent cation, or a combination thereof, M3 is a divalent cation, a trivalent cation, a tetravalent cation, a pentavalent cation, a hexavalent cation, or a combination thereof, M4 is Ir, Ru, Mn, Sn, or a combination thereof, X is a monovalent anion, a divalent anion, a trivalent anion, or a combination thereof, and 6?A?8, 0?B<2, 2.8?C?3, 0?D?0.2, 0<E<2.0, 0<F<2.0, 0<G?0.2, 9?H?12, and 0?I?2 are satisfied.

Abstract: A battery module cooling structure includes a plurality of battery modules, a plurality of cooling blocks arranged adjacent to the battery modules to cool the battery modules, and a cooling passage which passes through the cooling blocks adjacent to each other and in which cooling water flows. Each of the cooling blocks includes an upper panel that closes an upper portion of the cooling block and forms an upper body, a lower panel that is spaced apart from the upper panel and closes a lower portion of the cooling block, and a side wall that extends along a periphery of the lower panel and has an end fixed to the upper panel.

Abstract: The present invention relates to various lithium ion battery cathodes as well as lithium ion batteries incorporating one or more of these cathodes. The present invention further relates to processes of preparing the lithium ion battery cathode.

Abstract: An embodiment of the present invention relates to a cylindrical lithium ion secondary battery. The technical problem to be solved is to provide a cylindrical lithium ion secondary battery which is designed such that a safety vent is formed and at the same time or afterwards excess metal can be guided to a curved portion adjacent to the safety vent, thereby enhancing the flatness of a can floor and reducing damage to the safety vent. To this end, the present invention provides a cylindrical lithium ion secondary battery comprising: a cylindrical can; an electrode assembly accommodated in the cylindrical can; and a cap assembly for sealing the cylindrical can, wherein the cylindrical can comprises a circular floor portion, a curved portion curved from the floor portion towards the electrode assembly, and a safety vent formed on the curved portion.

Abstract: A rechargeable energy storage system includes a plurality of battery cells and a wall structure disposed adjacent to the plurality of battery cells and having an inner layer and an outer layer. An interior reinforcement structure includes a first sheet metal member and a second sheet metal member each having a plurality of vertical sections and a plurality of horizontal sections. The first and second sheet metal members define an aligned load transfer section wherein one of the plurality of horizontal sections of the first sheet metal member is vertically aligned with one of the plurality of horizontal sections of the second sheet metal member. The first and second sheet metal members define a crush region wherein one of the plurality of horizontal sections of the first sheet metal member is vertically misaligned with all of the plurality of horizontal sections of the second sheet metal member.