Abstract: A battery pack includes a plurality of battery modules including a first battery module and a second battery module; and a busbar electrically connecting the first battery module and the second battery module, wherein the first battery module or the second battery module includes a vent hole in a portion corresponding to a portion of the busbar.

Abstract: Provided are a novel boron-containing compound and an electrolyte solution additive for a secondary battery including the same. The electrolyte solution for a secondary battery provided in one embodiment includes the novel boron-containing compound, thereby suppressing the decomposition of an electrolyte solution to improve the capacity and the life characteristics of a battery.

Abstract: The present invention relates to a battery module. The battery module according to the present invention includes a housing having an internal accommodation space; and a plurality of battery cells disposed in the internal accommodation space, in which the housing includes a weld joint in which a first base material of a first aluminum-based alloy and a second base material of a second aluminum-based alloy are welded, and at least a partial region of a bead surface of the weld joint is located inward with respect to a reference plane, with an imaginary plane, which connects an outer surface of the first base material and an outer surface of the second base material in contact with the weld joint, as the reference plane.

Abstract: A battery module includes a plurality of secondary battery cells, including at least one weak sealing portion, and a housing unit in which the plurality of secondary battery cells are accommodated. The housing unit includes a flame discharge opening formed to face the weak sealing portion such that flame or exhaust gas, discharged from the weak sealing portion, is induced to be discharged outwardly of the housing unit.

Abstract: An apparatus for loading and unloading a roll includes a roll support portion disposed adjacent to a roll unwinder; a first traveling rail disposed on one side of the roll unwinder; a moving frame movably installed on the first traveling rail; and a roll attaching and detaching unit movably installed on the moving frame, wherein the roll support portion includes a lifting unit configured to move up and down a disposed roll, and wherein the roll attaching and detaching unit includes a moving plate moving on the moving frame, and a main body portion rotatably installed on the moving plate.

Abstract: A battery cell includes: an electrode assembly; a battery case accommodating the electrode assembly and an electrolyte; and a gas discharging portion disposed between the electrode assembly and the battery case, and opening and closing a flow path based on pressure within the battery case, wherein the gas discharging portion includes: a moving member being moved in the flow path; a plurality of elastic members each elastically supporting the moving member; and a plurality of support members each disposed between the moving member and the elastic member, and in point contact with the moving member.

Abstract: A battery module is proposed. The battery module includes a plurality of battery sub-modules, and a front cover part configured to cover an outermost stacking surface of the plurality of stacked battery sub-modules. The front cover part includes a front plate including a contact terminal electrically connected to an outside, a bus bar electrically connecting the plurality of battery sub-modules to each other, and a disconnection induction bus bar coupled to an inside end of the contact terminal to press and contact the bus bar, and a switching slider configured to slide between the bus bar and the disconnection induction bus bar.

Abstract: A battery module includes a housing having an internal space, a cell stack disposed in the internal space and including a plurality of battery cells and one or more thermal barrier assemblies, and an adhesive member disposed between the cell stack and the housing, wherein at least a portion of the adhesive member fills a gap between at least one edge of the thermal barrier assembly and the housing, and the at least one edge of the thermal barrier assembly is coupled to the housing by the adhesive member.

Abstract: Provided are the system and method of molding a gas collection portion of a battery pouch, and more particularly, the system and method of molding a gas collection portion to collect gas in a portion where an electrode tab welding portion of a battery pouch is disposed. In the system and method of molding the gas collection portion of the battery pouch according to the present disclosure, the electrode tab welding portion may also be molded when the battery pouch is molded, and the gas generated in the battery cell may thus be collected in a space formed between the pouch inclined surfaces, thereby preventing or delaying venting of the battery pouch.

Abstract: A pouch case is provided which includes: a forming portion having a predetermined depth, and allowing each of a first end surface and a second end surface of the electrode assembly to be received therein; a notch portion extending from each of opposite ends of the forming portion so as to have a depth gradually decreasing from a depth defined by the thickness of the electrode assembly received in the forming portion; and a storing portion covering a remaining portion other than a portion of the electrode assembly received in the forming portion. By effectively controlling a protruding structure of the pouch case sealed on the first and second end surfaces of the electrode assembly received therein, it is possible to improve contact reliability between the stacked battery cells.

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: Provided is a battery management system and method for selecting at least one battery cell of a high-risk group and calculating a maximum current limit value for stably using a battery pack using the selected at least one battery cell of the high-risk group. According to the present invention, the battery cells of high-risk group may be selected and managed by calculating a maximum voltage change amount of a plurality of battery cells, and the battery pack may be stably used by calculating a maximum current limit value that prevents the battery cell from being out of an operating voltage range to have a maximum margin.

Abstract: Provided is a negative electrode for a secondary battery including: a current collector, and a negative electrode active material layer formed on the current collector and containing a first negative electrode active material having a large particle size and a second negative electrode active material having a small particle size, wherein the second negative electrode active material is contained in an amount of 10% by weight or less based on the total weight of the negative electrode active material, and the following Relational Equation 1 is satisfied: [Relational Equation 1] 0.4<D2/D1<0.7; wherein D1 and D2 are the particle sizes (D50, ?m) of the first and second negative electrode active materials, respectively.

Abstract: A battery module which uses a flexible printed circuit board (FPCB) to provide a transmission path of information on the voltage or temperature thereof sensed by a bus bar. The battery module may have a smaller size in a height direction compared to a case of using a rigid printed circuit board (RPCB) or a wire instead of the FPCB to provide the transmission path of the information on the voltage or temperature, and may thus have improved energy efficiency per volume.

Abstract: The present invention provides a fabrication method of a negative electrode for a secondary battery, including: (a) heating a slurry composition for a negative electrode containing a negative electrode active material, a binder, and a solvent to a temperature lower than a boiling point (Tb) of the solvent; (b) applying the heated slurry composition for a negative electrode onto a current collector; and (c) cooling the applied slurry composition for a negative electrode.

Abstract: A plug-in type energy storage system is proposed. The system includes: a plurality of battery racks configured to store power; and a panel configured to control charging or discharging of the plurality of battery racks, where each battery rack includes: a plurality of battery modules configured to store the power; a control module connected to each battery module and the panel to control the charging or discharging of each battery module according to a control signal received from the panel; a conversion module connected to the control module to convert waveforms of the power into direct current or alternating current according to a control signal received from the control module; and a casing configured to accommodate each battery module, the conversion module, and the control module. In addition, the plurality of battery modules and the battery power management unit integrally constitute each battery rack.

Abstract: A taping apparatus for a secondary battery, configured to adhere an adhesive member cut and provided as a single sheet to a secondary battery cell including an accommodating portion in which an electrode assembly is accommodated and a sealing portion folded in a direction of the accommodating portion and sealing an edge of the accommodating portion, includes a support unit supporting a portion of the adhesive member; and a roller unit continuously moving in at least one direction of the accommodating portion and the sealing portion and adhering the adhesive member supported by the support unit to the secondary battery cell.

Abstract: Provided is a negative electrode for a secondary battery including: a current collector; and a negative electrode active material layer including a negative electrode active material, formed on the current collector, with the negative electrode satisfying Relation 1: 3.0<?*DP<7.2 ??[Relation 1] with ? a tortuosity of the negative electrode, and DP a pellet density (g/cm3) of the negative electrode active material, measured by pressing the negative electrode active material at 8 kN/cm2. Also provided is a secondary battery including the same.

Abstract: Provided is a battery assembly including: a battery housing; a battery cell assembly including a plurality of battery cells which are stacked and placed in the housing and are electrically connected; and a heat dissipation resin layer, and the battery assembly has minimized cell damage due to a swelling phenomenon occurring in a battery cell and an improved module life by controlling the physical properties of the low-hardness heat dissipation resin layer.

Abstract: A battery pack comprising one or more battery modules and a support frame opposing the one or more battery modules in a first direction, the one or more battery modules including a plurality of battery cells stacked in the first direction to form a cell stack and a side cover opposing the cell stack in the first direction, wherein the side cover comprises a first inclined surface opposing the support frame and inclined with respect to the first direction.