Abstract: A penetration test apparatus may include a penetration unit having a needle-shaped conductor formed in the shape of a sharp needle, a guide unit configured to push out the penetration unit such that the needle-shaped conductor bores a side of a battery cell, and a holder configured to receive the penetration unit. When the guide unit pushes the penetration unit, the needle-shaped conductor of the penetration unit can penetrate the side of the battery cell. A battery cell penetration test method using the penetration test apparatus is also disclosed.

Abstract: The battery pack includes a battery module; and a pack case provided to accommodate the battery module therein. The pack case includes a bottom cover accommodating the battery module; and a top plate having cooling fins protruding from one surface facing the inside of the pack case and vertically coupled to the bottom cover so that the upper portion of the battery module is covered, and is configured such that the venting gas generated in the battery module is discharged to the outside of the pack case through empty spaces formed between the cooling fins.

Abstract: A battery module manufacturing apparatus is capable of switching between a heating function and a cooling function and a manufacturing method using the same, and more particularly to a battery module manufacturing apparatus including a pressing jig and a base jig located under the pressing jig. The base jig includes a temperature conversion unit capable of switching between a heating function and a cooling function, and a battery module manufacturing method using the same.

Abstract: An energy storage system connected with at least one photovoltaic module and a power grid and including a plurality of battery racks may comprise a direct current/direct current (DC/DC) converter for controlling charging and discharging of the plurality of battery racks, a DC connector for connecting the photovoltaic module and the DC/DC converter, a power conversion system for receiving an output of the DC connector as input and converting the output of the DC connector into AC (alternating current) power, and a controller for monitoring states of the plurality of battery racks, the DC/DC converter, the photovoltaic module, and the power conversion system, comparing a DC voltage of the photovoltaic module and a DC voltage of the power conversion system, and controlling operations of the power conversion system and the DC/DC converter according to a result of comparison.

Abstract: The present disclosure relates to an electrode assembly for a secondary battery comprising two or more electrodes and one or more separators stacked in a stacking direction. The two or more electrodes respectively comprise electrode tabs, the electrode tabs include a metallized film in which metal layers are formed on both surfaces of a polymer substrate and the electrode tabs are arranged so as not to wholly overlap in the stacking direction Tabs are electrically connected through a first metal connector at an upper portion where the metal layer is formed, and are electrically connected through a second metal connector at a lower portion where the metal layer is formed. The present disclosure also relates to a secondary battery including the electrode assembly.

Abstract: An electrode assembly includes a first electrode, a second electrode, and a separator interposed therebetween. The first electrode, the second electrode and separator are wound in a winding direction about a winding axis to define a core and an outer circumference of the electrode assembly. The first electrode includes an active material portion coated with an active material layer and a first non-coated portion not coated with the active material layer along the winding direction. The first non-coated portion includes a plurality of impregnation slits extending along a circumferential direction of the electrode assembly. Longitudinal extension lines of impregnation slits adjacent to each other along the circumferential direction do not overlap each other.

Abstract: A slot die coater includes a lower die block including a first manifold in which an electrode active material slurry is accommodated, an upper die block including a second manifold in which an insulating coating solution is accommodated, and a shim plate located between the lower die block and the upper die block to form a slot communicating with a discharge port. The shim plate includes a first concave portion provided in a first surface located to cover the first manifold of the lower die block, and a second concave portion provided in a second surface located to cover the second manifold of the upper die block, wherein two second concave portions are configured to be located on opposite sides of the first concave portion in a width direction.

Abstract: A secondary battery according to one embodiment of the present disclosure may includes an electrode assembly a first battery case that houses the electrode assembly and a second battery case that houses the first battery. The second battery case may be formed to have a different color from that of the first battery case.

Abstract: A secondary battery according to an embodiment of the present disclosure includes an electrode assembly to which an electrode lead is attached; a case accommodating the electrode assembly so that a portion of the electrode lead is exposed to the outside; a sealing portion formed in the case to seal the electrode assembly; and a lead film covering a portion of an outer surface of the electrode lead and interposed between the electrode lead and the sealing portion, wherein the electrode lead includes a first region not corresponding to the lead film and exposed to the outside of the case, a second region corresponding to the lead film, and a third region not corresponding to the lead film and not exposed to the outside of the case, wherein a separation groove may be located in the third region.

Abstract: A battery module includes a plurality of cell assemblies including a plurality of secondary batteries; a module housing including an accommodation space configured to accommodate the plurality of cell assemblies; and a blocking member configured to, when a gas pressure more than a predetermined gas pressure or a heat more than a predetermined temperature is generated in at least some cell assemblies among the plurality of cell assemblies, block the generated gas or heat from moving to the other cell assemblies.

Abstract: A secondary battery includes an electrode assembly, a battery can in which the electrode assembly is accommodated, a cap assembly including an upper cap plate defining a positive terminal, the cap assembly being disposed above the battery can, a gasket surrounding a rim of the cap assembly and interposed between the battery can and the cap, and a porous member disposed between the cap assembly and the gasket to discharge gas generated in the battery can to outside the battery can.

Abstract: A battery pack includes a battery module including a battery cell stack in which a plurality of battery cells are stacked, a pack frame for accommodating the battery module, a heat sink located between the battery cell stack and the pack frame, and a cooling fin between the two battery cells adjacent to each other. The cooling fin comprises a body part in contact with the battery cell, and an extension part extending to the upper side (z-axis) of the battery cell stack and located adjacent to the heat sink. The extension part has a bent part formed by bending in a direction different from the upper side (z-axis).

Abstract: The present invention relates to a device for measuring the thermal characteristics of a pouch-type battery cell, specifically, the thermal conductivity of the battery cell, and a thermal conductivity measurement method using the same. When the battery cell thermal conductivity measurement device of the present invention is used, the thermal conductivity of a pouch-type battery cell exhibiting anisotropic thermal conductivity characteristics can be separated along each direction and measured, and thereby stability according to the thermal characteristics of a product, which uses a battery cell for a rechargeable battery, can be efficiently evaluated.

Abstract: A method of cooling a rack of heat dissipating components comprises cooling air, and porting the cooled air into a volume in front of the rack from above the volume. The method further comprises moving the cooled air from the volume in front of the rack to a plenum at a rear portion of the rack to pressurize the plenum. The cooled air is moved with an air mover disposed at a bottom portion of the rack, The method also comprises flowing air from the pressurized plenum past or through heat dissipating components in the rack to the volume in front of the rack, by force of pressure in the plenum through air-directing ports in the plenum. The air may be flowed through the heat dissipating components, around the heat dissipating components, or both. The method further comprises drawing warm air from an upper portion of the volume in front of the racks to cool it again.

Abstract: Provided is a non-aqueous electrolyte solution for a lithium secondary battery containing a lithium salt, an organic solvent and a phosphoric acid-based additive of Formula 1 below, which significantly improves the high temperature stability of the lithium secondary battery: wherein R is described herein.

Abstract: A ceria-carbon-sulfur (CeO2—C—S) composite including a ceria-carbon (CeO2—C) composite in which cylindrical carbon materials having ceria (CeO2) particles bonded to surfaces thereof are entangled and interconnected to each other in three dimensions; and sulfur introduced into at least a portion of an outer surface and an inside of the ceria-carbon composite, a method for preparing the same, and positive electrode for a lithium-sulfur battery and a lithium-sulfur battery including the same.

Abstract: A method for pre-treating lithium metal for a lithium secondary battery including stripping a surface oxide film formed on a surface of the lithium metal by discharging the battery, and a plating lithium metal on the surface of the lithium metal, from which the surface oxide film has been stripped, by charging the battery.

Abstract: An apparatus for manufacturing the secondary battery includes a first measurement part photographing unit cells, which are continuously transferred, to measure a position of a first electrode having a relatively large size of the first electrode and a second electrode, which are provided in the unit cells and have polarities opposite to each other, from an image of each of the photographed unit cells; and a first arrangement part disposing the unit cell passing through the first measurement part at a preset position of the separation sheet to adjust an interval between the unit cells disposed on the separation sheet on the basis of the position of the first electrode, which is measured by the first measurement part.

Abstract: The present invention relates to a method of manufacturing a separator-composite electrode having a multilayer-structured inorganic layer and a separator-composite electrode manufactured thereby. The present invention provides a method of manufacturing a separator-composite electrode and a separator-composite electrode using the same, wherein there is no separator substrate by forming an inorganic layer serving as an insulating layer in multiple layers, thereby safety is improved and the capacity of a battery is not reduced compared to a conventional battery.

Abstract: A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes a lithium salt, an organic solvent, and a phosphoric acid-based additive represented by Formula 1 below, which improves the high temperature stability in a lithium secondary battery: wherein R is described herein.