Abstract: The present disclosure relates to a separator for lithium secondary battery, a method for manufacturing same, and a lithium secondary battery including the same. Specifically, in one embodiment of the present disclosure, by filling the pores of the separator, the present invention physically inhibits the metal column capable of growing on the surface of the negative electrode from moving toward the positive electrode, inhibits a micro-short circuit of the lithium secondary battery, and ultimately improves the lifetime of the lithium secondary battery. In addition, by controlling the type of filling the pores of the separator and the type of the polymer filling it, the output characteristics of the lithium secondary battery are secured and improved.

Abstract: A battery management apparatus, battery management method and battery pack that detects feature points of each of a first differential capacity curve acquired by charging the battery with a first constant current, a second differential capacity curve acquired by discharging the battery with the first constant current, a third differential capacity curve acquired by charging the battery with a second constant current and a fourth differential capacity curve acquired by discharging the battery with the second constant current, and determines degradation information of the battery based on voltage values of the feature points detected from each differential capacity curve.

Abstract: A method of producing a negative electrode is disclosed which is capable of preventing volume expansion and structural deformation caused by pre-lithiation, maintaining proximity and contact between negative electrode active materials, preventing an increase in resistance of a negative electrode, and realizing an excellent capacity retention rate by performing pre-lithiation while pressurizing a negative electrode at a specific pressure. In addition, the method of producing a negative electrode is capable of improving quality consistency of a product and processability by performing pre-lithiation of a negative electrode in a roll-to-roll manner.

Abstract: A plurality of driving circuits drive a plurality of contactors for connecting the battery pack and an external apparatus, respectively, based on a supply voltage. A processing circuitry control the plurality of driving circuits to sequentially close the plurality of contactors in a predetermined order, and check the supply voltage before closing each of the contactors.

Abstract: A battery system includes a battery pack having a metal housing capable of accommodating a plurality of battery modules, a plurality of slave battery management systems configured to manage the plurality of battery modules, and a master battery management system installed outside the metal housing to wirelessly communicate with a first battery management system among the plurality of slave battery management systems, wherein the first slave battery management system which communicates with the master battery management system is installed at a boundary of the metal housing so as not to be shielded with the metal housing.

Abstract: A negative electrode active material for a lithium secondary battery, which includes a silicon-based particle represented by M-SiOx, wherein M is Li, Mg, Ca, Al, or Ti, and 0?x<2, wherein the M-SiOx includes an amorphous phase at 20 wt % to 70 wt % based upon a total weight of the M-SiOx, thereby exhibiting excellent initial efficiency and lifespan characteristics, and a preparation method thereof.

Abstract: A pouch type battery cell according to an embodiment of the present invention may include an electrode assembly accommodated between a pair of cases, each of which include a first resin layer constituting an innermost layer, a second resin layer constituting an outermost layer, and a metal layer stacked between the first and second resin layers. The pouch type battery cell may include a cup portion, accommodating the electrode assembly, an insulation sealing portion, in which the first resin layers of the pair of cases are sealed to each other, a folded portion, in which an edge of one case of the pair of cases is folded to surround an edge of the other case, and a metal sealing portion, provided on the folded portion, in which the metal layers of the pair of cases are sealed to each other.

Abstract: A secondary battery case accommodates an electrode assembly having a structure in which electrodes and separators are alternately arranged, and includes a first cup having a recessed shape, a second cup having a recessed shape and provided on one side of the first cup, a first peripheral portion surrounding a perimeter of the first cup when the secondary battery case is unfolded, and a second peripheral portion surrounding a perimeter of the second cup when the secondary battery case is unfolded. The first peripheral portion includes a first cup-corresponding peripheral portion that corresponds to a width of the first cup, and the second peripheral portion includes a second cup-corresponding peripheral portion that corresponds to the second cup. The width of the first cup is greater than a length of the first cup-corresponding peripheral portion thereby reducing if not eliminated a bat-ear otherwise formed during manufacture.

Abstract: The present invention relates to a battery cell comprising a separator in which a perforated line and magnetic bodies adjacent to the perforated line are formed, and a method for evaluating battery cell safety by using same, wherein the battery cell can induce an internal short circuit without physical deformation of the cell structure, and can be effectively applied to evaluation of battery cell safety against an internal short circuit.

Abstract: According to one aspect of the present invention, a secondary battery has a bent part disposed on an end of an upper portion of the battery can. The bent part is bent inward toward a top cap to fix the top cap. The secondary battery is configured such that, when an internal pressure of the battery can exceeds a predetermined value, a region (R) in which the top cap and the bent part overlap each other when viewed from above is reduced by deformation of the top cap or the bent part to allow an entire region of the top cap to become spaced further from the battery can.

Abstract: The present invention relates to a secondary battery. The secondary battery includes a can configured to accommodate an electrode assembly; and a cap assembly bonded to an opening of the can. The cap assembly includes an upper cap provided in the opening and connected to an electrode tab of the electrode assembly and a lower cap configured to bond the upper cap to the opening. The lower cap includes a first bonding part bonded to a bottom surface of the upper cap to support the upper cap and a second bonding part formed on an outer circumferential surface of the first bonding part to fix the upper cap while being bonded to the upper cap.

Abstract: An anode for a lithium metal battery and a lithium metal battery that contains an anode for a lithium metal battery, wherein 1) using an anode current collector including multiple holes that, independently from each other, form first pores on one side of a metal plate and form second pores having relatively larger diameters than the first pores on the other side of the metal plate, penetrate inside the metal plate, and connect the first pores and the second pores, and 2) a lithium metal layer that is formed so as to face the first pores of the anode current collector. Another embodiment of the present invention provides a lithium metal battery designed such that a separator faces the second pores (pores having relatively large diameters) of the anode current collector, using the anode for a lithium metal battery of one embodiment.

Abstract: A stacking inspection apparatus includes camera units that generate an aligned image by photographing four corner points of the outer periphery of the electrode plates or the unit cells at an upper part in a stacking direction of the electrode plates or the unit cells; and light irradiation units that irradiate light signals to four corner of the inspection object, and sensors that recognize the light signal irradiated from the light irradiation units and determine whether or not alignment of the first electrode plate and the second electrode plate is defective.

Abstract: A method for manufacturing an anode for a lithium secondary battery includes applying a slurry for forming a first anode active material layer on at least one surface of an anode current collector; applying a slurry for forming a second anode active material layer on the first anode active material layer; and drying. The first anode active material layer contains a mixture of natural graphite and artificial graphite in a weight ratio of 13 to 34:66 to 87 as an anode active material and a first binder respectively, and the second anode active material layer contains a mixture of artificial graphite and a silicon-based compound in a weight ratio of 91 to 99:1 to 9 as the anode active material and a second binder respectively.

Abstract: An electrode sheet notching apparatus includes: a conveying unit comprising a first roller and a second roller for conveying the electrode sheet; a jig unit comprising a jig for supporting the electrode sheet; and a processing unit comprising a laser for processing the electrode sheet. The jig has a slit formed on a surface facing the electrode sheet, and the laser beam, which processed the electrode sheet, moves on a plane coplanar with one surface of the electrode sheet to pass through the slit.

Abstract: A pre-dispersion for a positive electrode and a positive electrode slurry for a lithium secondary battery containing the same are disclosed herein. In some embodiments, a pre-dispersion comprises a positive electrode additive represented by the following Chemical Formula 1, a first conductive material, a binder: LipCo(1-q)M1qO4??[Chemical Formula 1] wherein M1 is one or more elements selected from the group consisting of W, Cu, Fe, V, Cr, Ti, Zr, Zn, Al, In, Ta, Y, La, Sr, Ga, Sc, Gd, Sm, Ca, Ce, Nb, Mg, B, and Mo, 5?p?7, and 0?q?0.5. Dispersibility and workability of the positive electrode additive in the positive electrode slurry are improved. Side reactions that may be generated in the preparation of the positive electrode slurry can be suppressed while minimizing the loss of the positive electrode additive, so that the electrical properties of the electrodes manufactured using the same are improved.

Abstract: A current collector and a method of manufacturing the same are disclosed herein. In some embodiments, a current collector includes a complex polymer film layer, wherein the complex polymer film layer includes: a polymer matrix; and a metal material dispersed in the polymer matrix, wherein the metal material is fiber-shaped or plate-shaped, and the metal material is oriented in one direction.

Abstract: A jelly-roll electrode assembly includes first and second electrodes spaced apart from each other and helically arranged in a first direction around a winding axis of a central core of the assembly. A separator overlapping portion includes a first separator positioned adjacent an inner surface of a terminal end of the second electrode and extending in a second direction opposite the first direction toward the central core, and a second separator positioned adjacent a terminal end of the first separator and extending in the second direction opposite the first direction toward the central core. A loop portion in which the first and second separators are looped about each other in the central core to extend in the first direction around the first and second electrodes such that the second separator extends in both the first and second directions within the separator overlapping portion.

Abstract: A battery module reinforces safety by reducing the influence on adjacent battery cells when a thermal event occurs. The battery module includes a plurality of battery cells having electrode leads; a module case configured to accommodate the plurality of battery cells in an inner space; a separation member configured to divide a space between at least some of the plurality of battery cells and having a slot into which the electrode lead is inserted; and an insulation block having an electrical insulating material and configured to surround an outer side of at least a part of the electrode lead inserted into the slot.

Abstract: The present disclosure relates to a method of preparing an electrode assembly capable of improving life characteristics and rapid charging performance by minimizing a space between a folding separator and an electrode. The method of preparing the electrode assembly includes disposing a plurality of unit cells on a first surface of a folding separator, fixing the unit cells on the first surface of the folding separator, providing a binder composition to at least one end portion of a second surface of the folding separator, and stacking the unit cells by folding the folding separator.