Abstract: Provided is an ultra-dispersion mixer, for stirring a mixed material for producing a high-quality slurry for an electrode of a secondary battery within a short time by disposing a low-speed blade and a high-speed blade for stirring a mixed material in a chamber so as to easily and effectively disperse elements of the slurry of a secondary battery, supplied to a mixer during a procedure of preparing the slurry of a secondary battery produced by performing mixing procedures multiple times, and disposing blade parts having a plurality of stirring characteristics so as to realize various stirring characteristics in the mixed material on the high-speed blade to increase the dispersion of the mixed material while the mixed material circulates in a high-shear disperser of the chamber and to simultaneously increase the temperature of a supplied solution at the beginning of stirring of the mixed material in the chamber.

Abstract: A battery module includes: a plurality of secondary battery cells; and a housing unit having an internal space in which the plurality of secondary battery cells are accommodated and including a plate member extending a flame or gas path.

Abstract: A cathode active material for a lithium secondary battery includes a lithium-aluminum-titanium oxide formed on a surface of a lithium metal oxide particle having a specific formula. The cathode active material may have an improved structural stability even in a high temperature condition.

Abstract: A battery module includes: a plurality of second battery cells, each including an electrode lead connected to an electrode assembly, a terrace portion of a cell body member in which the electrode assembly is accommodated, and a sealing portion connected to the terrace portion; a housing unit in which the plurality of secondary battery cells are accommodated; and a guard unit including a first area, facing at least a portion of the terrace portion, to delay swelling or bursting of the sealing portion of at least one of the plurality of secondary battery cells. The guard unit has a shape in which a first gap is smaller than a thickness of the cell body member to limit expansion of a thickness of the terrace portion, the first gap being a distance between internal surfaces of the first area.

Abstract: A pouch-type secondary battery includes an electrode assembly including a first electrode plate, a separator, and a second electrode plate; and a pouch film in which the electrode assembly is accommodated, wherein the pouch film includes a first side sealing portion from which a negative electrode lead connected to the electrode assembly protrudes, a second side sealing portion from which a positive electrode lead connected to the electrode assembly protrudes, and an upper sealing portion having both end portions connected to the first and second side sealing portions, and the pouch film includes a folded portion disposed on an end of the first side sealing portion and an end of the second side sealing portion, and folded toward a bottom portion of the pouch film, wherein the folded portion is folded in one direction.

Abstract: A battery holder device and a battery test system including the same are disclosed. The battery holder device and the battery test system including the same can grip battery calls and test the battery calls while rotating the gripped battery calls about two different axes. The battery holder device comprises a holder module including a holder housing forming a shape extending in a longitudinal direction and including a holder housing body, and a gripper movably coupled to the holder housing body. The holder housing body includes first and second holder housing body walls that are spaced apart from each other in the longitudinal direction of the holder housing and face each other, and a holder housing body bottom connecting the first and second holder housing body walls.

Abstract: A lithium secondary battery according to exemplary embodiments includes a cathode, a separation layer, and an anode facing the cathode with the separation layer interposed therebetween. The anode includes an anode current collector, and an anode active material layer formed on the anode current collector. The anode active material layer includes an anode active material and a conductive additive. The conductive additive includes an expandable graphite having a particle diameter of 10 ?m or less.

Abstract: Provided are a negative electrode for a lithium secondary negative electrode battery including: a current collector; a first negative electrode active material layer disposed on the current collector and including a silicon-based active material, a first graphite-based active material, and a linear conductive material; and a second negative electrode active material layer disposed on the first negative electrode active material layer and including a second graphite-based active material. The first graphite-based active material has a carbon coating layer on at least a part of a surface. Also provided is a lithium secondary battery including the negative electrode.

Abstract: An energy storage device includes a coated anode. The coated anode includes a metallic anode in contact with an electrically non-conductive star polymer coating. The star polymers in the star polymer coating include a core with at least 3 arms attached to the core. At least some of the arms of the star polymers have ionically conductive polar functional groups. The energy storage device further includes a cathode and an electrolyte in contact with both the cathode and the coated anode.

Abstract: Disclosed are a battery cell assembly for a secondary battery, the battery cell assembly for a secondary battery comprising: at least one battery cell; and a first frame disposed on one side of the at least one battery cell; and a second frame which is disposed on the other side of the at least one battery cell so as to face the first frame and which is coupled to the first frame so as to protect the edge of the at least one battery cell together with the first frame. The present invention uses a frame type cell support which retains and supports at least one battery cell without separation, thereby providing a battery cell assembly for a secondary battery, namely a sub-battery module receiving body, having improved structural stability and assembly convenience, and a secondary battery comprising the same.

Abstract: A battery module according to the present disclosure comprises a cell stack comprising a plurality of battery cells; and a module case covering the outside of the cell stack. A module case comprises a first case comprising a rib and a first coupling portion that has a greater thickness than that of the rib and that is connected to a side of the rib; a second case comprising a second coupling portion facing an upper portion of the rib and a side of the first coupling portion; a tunnel portion formed between the rib, the first coupling portion, and the second coupling portion; and a welding portion in which a boundary area of the first coupling portion and the second coupling portion is welded.

Abstract: In order to more accurately measure internal pressure of a secondary battery, the present disclosure provides a measurement method including (a) interposing the secondary battery between an upper plate and a lower plate, (b) increasing internal pressure of the secondary battery by injecting a gas into the inside of the secondary battery, (c) monitoring surface pressure of the secondary battery at a measuring member which is in contact with the lower plate, and (d) measuring a value of the surface pressure from the measuring member at a point in time when at least one sealing portion of the secondary battery is vented.

Abstract: A sealing apparatus is disclosed. In some implementations, the sealing apparatus includes a process chamber having an internal space, a cell loading portion configured to load a plurality of battery cells and enter the internal space of the process chamber, a plurality of sealing units disposed in the internal space of the process chamber, the plurality of sealing units configured to partially seal the battery cells, respectively, and a driving portion configured to move the plurality of sealing units such that the plurality of sealing units come into contact with the plurality of battery cells, respectively.

Abstract: An electrolyte solution for a lithium secondary battery includes an organic solvent, a lithium salt, and a pentaerythritol diphosphite-based compound including at least one substituent selected from the group consisting of a silyl group, a sulfonyl group, a phosphoryl group and a phosphino group. A lithium secondary including the electrolyte solution is provided.

Abstract: A lithium secondary battery includes a cathode including a cathode current collector and a cathode active material layer formed on the cathode current collector, and an anode including an anode current collector and an anode active material layer formed on the anode current collector. The anode active material layer has an area larger than that of the cathode active material layer. The cathode active material layer includes a central portion and an outer portion surrounding the central portion, and the outer portion has a specific capacity less than that of the central portion.

Abstract: An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on the anode current collector. The anode active material layer including a lower anode active material layer formed on the anode current collector and an upper anode active material layer formed on the lower anode active material layer. Each of the lower anode active material layer and the upper anode active material layer includes a first anode active material and a second anode active material having a hardness less than that of the first anode active material. A total intrusion amount of mercury to pores having a diameter of 3 nm to 10 ?m in the anode active material layer measured by a mercury porosimeter is 0.27 ml/g or more.

Abstract: An apparatus for automatically supplying an electrode plate, may include: a magazine provided by stacking a plurality of electrode plates; a lifting unit provided on the magazine, and on which the electrode plate is seated; and a sensing member provided in the lifting unit, and configured to sense an electrode plate disposed in a lowermost position of the electrode plates.

Abstract: Provided is a lithium secondary battery comprising: a cathode comprising a cathode active material, an anode comprising an anode active material, a separator interposed between the cathode and the anode, and an electrolyte for a secondary battery, wherein the cathode active material is Lix(NiaCobMnc)O2, wherein 0.90?x?1.10, 0.5?a?0.99, 0.005?b<0.5, 0.005?c<0.5, and a+b+c=1, and the electrolyte for a secondary battery comprises a lithium salt, a nonaqueous organic solvent, and a cyclic phosphate compound represented by the following Chemical Formula 2: wherein R1 to R6 and R? and R? are independently of one another hydrogen or C1-C4 alkyl; L2 is —CR7R8—; and R7 and R8 are independently of each other C1-C4 alkyl .

Abstract: A battery module includes: a plurality of secondary battery cells, each including an electrode lead connected to an electrode assembly, a terrace portion forming a periphery of a cell body member in which the electrode assembly is accommodated, and a sealing portion formed to be connected to the terrace portion; a housing in which the plurality of secondary battery cells are accommodated; and a guard unit installed to face at least a portion of the terrace portion and at least a portion of the sealing portion to delay bursting of the sealing portion of at least one of the secondary battery cells. In the guard unit, a gap between internal surfaces facing the terrace portion is formed to be smaller than a thickness of the cell body member to limit expansion thickness of the terrace portion.

Abstract: An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer disposed on the anode current collector. The anode active material layer includes a first anode active material layer including a first anode active material and a first binder that includes an acrylate-styrene butadiene copolymer, and a second anode active material layer disposed on the first anode material layer, the second anode active material layer including a second anode active material and a second binder that includes an acrylate-styrene-butadiene copolymer. A peak intensity ratio according to Raman spectroscopy of the first anode active material is smaller than the peak intensity ratio according to Raman spectroscopy of the second anode active material, and the peak intensity ratio according to Raman spectroscopy is represented as ID/IG.