Abstract: A method and a system for stabilizing battery cells of an energy storage system (ESS) to enable uniform charge/discharge without the generation of a state of charge (SOC) deviation among the battery cells by charging/discharging the plurality of battery cells included in a battery rack differently by module unit to minimize the deterioration and impact caused by intermittent charge/discharge.

Abstract: A non-aqueous electrolyte solution and a lithium secondary batter including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes a lithium salt, an organic solvent, and a first additive including a compound represented by Formula 1: wherein R1, and R2 are each independently hydrogen; or an alkyl group having 1 to 5 carbon atoms.

Abstract: Disclosed is a battery apparatus that measures a temperature of the battery apparatus, determines an estimated naturally-decreasing temperature based on information including a difference between the temperature of the battery apparatus and an atmospheric temperature in response to the temperature of the battery apparatus being higher than the atmospheric temperature, determine a stop temperature based on a reference temperature of the stop temperature and the estimated naturally-decreasing temperature, and stops a cooling operation of the battery apparatus in response to the temperature of the battery apparatus being lower than the stop temperature.

Abstract: Disclosed are a pouch-shaped battery case including an upper case and a lower case sealed to one another, the upper case and the lower case made of a laminate sheet comprising a metal layer and a resin layer, at least one of the upper case and the lower case having a concave unit for receiving an electrode assembly, the upper case and the lower case being sealed at all corners thereof located along the outer edge of the concave unit, a middle of a first side surface of each of the upper case and the lower case having a non-sealed portion for gas discharge, the first side surface being adjacent to a second side surface of each of the upper case and the lower case through which an electrode terminal extends, a method of manufacturing the pouch-shaped battery case, and a sealing block for manufacturing the pouch-shaped battery case.

Abstract: A cell module assembly includes a plurality of battery cells, each of the battery cells having electrode leads, a case configured to receive the battery cells, a cover plate located at an open upper surface of the case so as to be coupled to the case, and a busbar unit located at the front and the rear of the case, from which the electrode leads of the received battery cells protrude. The case is configured to have a U shape in which a base plate defining a bottom surface of the case and side plates defining opposite side surfaces of the case are coupled to each other, and the busbar unit includes a busbar frame, one side of which is bent, whereby a process of manufacturing the cell module assembly is simplified and the battery cells are easily received in the case.

Abstract: A battery module includes a sub module including a plurality of battery cells, a lower housing to receive the sub module therein and having an opening, a first housing cover coupled to the lower housing, covering the opening of the lower housing, and having a gas inlet, a second housing cover coupled to the first housing cover from above to form a gas receiving space therebetween, and having a gas outlet, and a variable partition structure using hinges installed in the gas receiving space to partition the gas receiving space to define a gas exhaust path to increase a movement path of a flame entering together with gas occurred in the sub module and entering the gas receiving space through the gas inlet.

Abstract: The present invention relates to a method for analyzing a degree of impregnation of an electrolyte of an electrode in a battery cell, the method comprising: a battery cell manufacturing step (S1) of preparing a battery cell by injecting an electrolyte into a battery cell including an electrode to be evaluated; a step of charging/discharging the battery cell several times and obtaining a capacity-voltage profile for each cycle (S2); a step of obtaining a differential capacity (dV/dQ) curve obtained by differentiating the capacitance-voltage profile for each cycle with respect to the capacity (S3); and a step of, in the differential capacity curve, determining a cycle at which behavior becomes the same as a time point when impregnation is sufficiently performed (S4).

Abstract: A method for evaluating phase stability of an electrode mixture slurry, including the steps of: (S1) introducing the electrode mixture slurry to a rheometer; (S2) applying a first shear rate to the electrode mixture slurry; (S3) applying a second shear rate after applying the first shear rate to the electrode mixture slurry, wherein the second shear rate is higher than the first shear rate; (S4) applying a third shear rate after applying the second shear rate to the electrode mixture slurry, wherein the third shear rate is lower than the second shear rate; and (S5) comparing the shear viscosity at the first shear rate with the shear viscosity at the third shear rate. An apparatus for evaluating phase stability of the electrode mixture slurry is also provided.

Abstract: A method for pre-lithiation of a negative electrode for a secondary battery, for reducing the time required for pre-lithiation and reducing changes in volume of the electrode. The method includes immersing a negative electrode for a secondary battery in the electrolyte to perform electrolyte impregnation, and pre-lithiating the negative electrode. Immersing the negative electrode for the secondary battery in an electrolyte includes introducing the prepared negative electrode into an electrolyte bath containing the electrolyte, and removing air bubbles and moisture in the negative electrode by applying a vacuum to the electrolyte bath in which the negative electrode is immersed.

Abstract: An electrode including: a coating part coated with an electrode active material; and an electrode tab part provided on one side of the coating part, wherein the electrode tab part includes: a first electrode tab connected to the one side of the coating part; and a second electrode tab connected to the first electrode tab and bent in a direction of the first electrode tab to overlap one surface of the first electrode tab.

Abstract: Disclosed is a battery module, which includes: a plurality of battery cells stacked side by side; a module case configured to accommodate the plurality of battery cells; a heatsink mounted to an outer side of the module case to cool the plurality of battery cells; and at least one heat transfer pad disposed in contact with the heatsink and the plurality of battery cells to penetrate the module case at least partially.

Abstract: A secondary battery static pressure jig and a secondary cell internal pressure control method using the same is provided. The secondary battery static pressure jig, includes: a supporting member disposed on both surfaces of a battery cell to support the battery cell; a piezoelectric element that is disposed on at least one of surfaces of the supporting member and the battery cell contacting each other and measures a pressure applied to the battery cell; and a controlling part that controls a volume of the piezoelectric element according to the pressure measured by the piezoelectric element, wherein a volume of the piezoelectric element may be changed according to the volume change of the battery cell, and the pressure applied to the battery cell from the supporting member by the volume change of the piezoelectric element may be made to be a constant pressure.

Abstract: An apparatus for estimating a state of a secondary battery, connectable to a positive electrode lead, a negative electrode lead, a first measuring lead, and a second measuring lead in the secondary battery, including: a terminal case including: inner terminals contactable with the positive electrode lead, the negative electrode lead, the first measuring lead, or the second measuring lead on a first surface of the terminal case, and outer terminals respectively electrically connectable to the inner terminals on a second surface facing the first surface of the terminal case, a voltage measuring unit electrically connected to at least two of the outer terminals, and measuring a potential difference between the first and the second measuring lead, and a control unit estimating a state of health of the secondary battery based on the potential difference between the first measuring lead and the second measuring lead.

Abstract: Disclosed is a welding jig for welding an electrode lead of a battery cell and a sensing bus bar of a bus bar assembly to each other, and the welding jig includes a jig body disposed above the electrode lead and the sensing bus bar during the welding; and a positioning guide unit coupled to the jig body and configured to make a step correction in at least three directions when the electrode lead and the sensing bus bar are welded.

Abstract: The present disclosure relates to a battery module and a battery pack including the same. A battery module according to an embodiment of the present disclosure may includes a battery cell stack in which a plurality of battery cells are stacked, a module frame arranged so as to wrap the battery cell stack, a busbar frame arranged so as to cover the front and rear surfaces of the battery cell stack that is exposed from the module frame, and an end plate arranged so as to cover the busbar frame. The module frame may includes a lower frame for covering the lower part and both side surfaces of the battery cell stack, and an upper plate for covering the upper part of the battery cell stack. At least one assembly guide part may be formed at an edge of the lower frame coupled to the upper plate.

Abstract: An apparatus and method for diagnosing an insulation resistance measurement circuit, and more particularly an insulation resistance measurement circuit of a battery cell or a battery module. When diagnosing the state of the insulation resistance measurement circuit, since the voltage ratio based on the measured voltage value of the battery module and the estimated voltage value is used, there is an advantage that the state of the insulation resistance measurement circuit may be diagnosed more diversely and accurately.

Abstract: Provided is a manufacturing method of an electrode, wherein productivity is improved by preventing a short circuit forming between a positive electrode and negative electrode even when an overhang occurs during manufacture of an electrode assembly. The present technology includes a step of forming an electrode active material layer and a resistance layer, by applying a resistance layer composition including inorganic additives and an electrode slurry, including an electrode active material on a current collector; a step of drying the current collector in which the electrode active material layer and resistance layer are formed; and a step of forming the electrode in which an electrode tab is formed at one end by notching the dried current collector and the method of forming the electrode active material layer and resistance layer is performed by one slot die in which two discharge ports are formed.

Abstract: The present invention relates to a waste battery treatment method which includes preparing a waste battery including a waste positive electrode which includes an aluminum current collector and a positive electrode active material layer formed on at least one surface of the aluminum current collector, heat treating the waste battery at a temperature of 650° C. or higher in an air atmosphere or oxidizing atmosphere to convert the aluminum current collector into aluminum oxide, and recovering aluminum oxide powder and positive electrode active material powder from the heat-treated waste battery.

Abstract: A method for pre-sodiation of a negative electrode, including the steps of: interposing a separator between a sodium ion-supplying metal sheet and a negative electrode to prepare a simple cell; dipping the simple cell in an electrolyte for pre-sodiation; and electrochemically charging the simple cell dipped in the electrolyte for pre-sodiation to carry out pre-sodiation of the negative electrode wherein the electrochemical charging is carried out while the simple cell is pressurized under a pressure of from 100 kPa to 1,000 kPa. A pre-sodiated negative electrode is also disclosed, including: a current collector; a negative electrode active material layer on at least one surface of the current collector. The negative electrode active material layer includes a negative electrode active material; and a coating layer on the surface of the negative electrode active material layer. The coating layer includes Na-carbonate and Na.

Abstract: An apparatus mounts a battery cell stack to a frame that includes a base cover and a pair of side covers respectively extending from both ends of the base cover. The apparatus includes a support member to support the battery cell stack, and two films, wherein one side of each of the two films is respectively attachable to one of the pair of side covers of the frame, and another side of each of the two films is respectively attachable to one of two side surfaces of the battery cell stack, wherein, when the support member and the frame move toward each other, the two films are movable into the frame, and the battery cell stack is movable along the two films to be mounted to the frame.