LG Energy Solution Patente

The present disclosure provides an air vent device comprising: a body unit having an oblique line-shaped groove formed therein; and an insertion unit having a protrusion coupled to the oblique line-shaped groove, wherein a space is formed between the insertion unit and the body unit by the movement of the protrusion in a state coupled to the oblique line-shaped groove, and wherein the oblique line-shaped groove comprises a first hooking groove at one side end and a second hooking groove at the other side end, and a filter comprising the same.

The present disclosure relates to a non-aqueous electrolyte comprising a lithium salt, an organic solvent and an additive, wherein the additive includes a compound represented by Formula 1, and the additive includes at least one of the compound represented by Formula 1, ethylene sulfate, and 1,3-propane sultone, and the compound represented by Formula 1 is included in the non-aqueous electrolyte in an amount of 0.25 wt% to 1.60 wt%, and a total content of the compound represented by Formula 1, ethylene sulfate, and 1,3-propane sultone may be 0.25 wt% to1.60 wt% based on a total weight of the non-aqueous electrolyte.In Formula 1, R₁ is -O-NO₂, and L₁ is an alkyleneoxy group having 1 to 5 carbon atoms, M is a metal cation or an organic cation, a is the valence of M when M is a metal cation, a is 1 when M is an organic cation, and a=b.

According to an embodiment of the present disclosure, provided is a device for producing an electrode slurry, comprising:a mixer in which an electrode material and a solvent are mixed;at least one liquid pipe that is connected to the mixer and introduces the solvent into the mixer; andat least one powder pipe that is connected to the mixer and introduces a powder electrode material into the mixer,wherein the powder pipe comprises a bent part in which the powder introducing direction changes, and comprises a first pipe connected to a powder tank in which a powder is stored on the basis of the bent part and a second pipe connected to the mixer, and the inside of the second pipe is formed with a high-pressure DIW spray nozzle that introduces distilled water (DI water, DIW) into the powder pipe and an air spray nozzle that introduces air.

Disclosed is a battery pack. The battery pack includes a case providing a space therein and having a pack cover; a battery module positioned inside the case and having a top plate facing the pack cover; and a spacer positioned between the top plate and the pack cover.

A positive electrode active material satisfying a specific parameter criterion for surface functional groups contained in the positive electrode active material is provided herein. A lithium secondary battery comprising the positive electrode active material is also provided herein. By introducing a parameter capable of evaluating the active material, the active material can be selected without separate evaluation of cells, thereby contributing to improving the development speed of cells. In addition, the lifespan of the secondary battery can be improved by improving the capacity retention rate of the positive electrode active material.

According to an embodiment of the present disclosure, provided is a positive electrode active material for lithium secondary battery, comprising: a lithium compound represented by the following Formula 1, and a carbon coating layer formed on the particle surface of the lithium compound, wherein the lithium compound has the form of secondary particles having a structure in which primary particles are aggregated each other, the average diameter(D50) of the secondary particles is 0.2 to 10 µm, the average diameter(D50) of the primary particles is 10 to 300 nm, and the ratio of the average diameter(D90)/average diameter(D10) of the secondary particles is 15 to 80, a method for preparing the same, a positive electrode and a lithium secondary battery comprising the same: [Formula 1] Li<1+a>M1<b>M2<c>O<2-d>X<d> wherein, in Formula 1, M1 is one or more selected from the group consisting of Ni, V, Mn, Mo, Cr, and Fe, and M2 is one or more selected from the group consisting of Ti, Zr, Nb, Mo, Ta, and W, 0.1≤a≤0.5, 0.2≤b≤0.6, 0.2≤c≤0.6, 1.05≤(1+a)/(b+c)≤1.5, 0≤d≤0.2, and X is a halogen element.

The present disclosure relates to a separator for an electrochemical device and an electrochemical device including the same, and more particularly, to a separator for an electrochemical device, wherein a coating layer provided on a porous polymer substrate includes inorganic particles, and the metal oxide in the inorganic particles has a controlled grain size, so that gas generation during the operation of an electrochemical device may be reduced, thereby improving the explosion safety of the electrochemical device, and an electrochemical device including the same.

An embodiment of the present disclosure provides a battery pack including a plurality of battery modules, a pack frame configured to accommodate the battery modules, a plurality of inter-busbars configured to electrically connect terminals of neighboring battery modules among the battery modules, and a heat-resistant cover positioned across the battery modules and configured to cover the inter-busbars.

The present disclosure relates to a secondary battery. A secondary battery according to an aspect of the present disclosure may include an electrode assembly extending in a first direction; a cap including a cover portion disposed on one side of the electrode assembly in the first direction and an extension portion extending from the cover portion toward the electrode assembly; and an exterior film surrounding the electrode assembly and coupled to the extension portion. The exterior film may include an accommodating portion that circumferentially surrounds the electrode assembly; a rim portion provided on one side of the accommodating portion in the first direction; and a coupling portion provided between the accommodating portion and the rim portion, coupled to the extension portion, and located at a predetermined first distance (d1) from a reference surface among outer surfaces of the cover portion, the reference surface facing the first direction.

Disclosed is a battery pack. The battery pack includes a base plate; a frame installed on the base plate, providing a space therein, and having a bottom plate; and a battery cell positioned inside the frame, and the bottom plate has a first venting hole facing the battery cell.

A battery system includes: a battery; a resettable fuse that is connected between a first node connected to a positive electrode of the battery and a second node connected to an external connection end and is closed after a predetermined recovery time after the resettable fuse is opened; a fuse compensation circuit that includes an operation switch connected between the first node and the second node and a sensing switch connected between a third node to which a voltage is provided according to a result of comparing a voltage of the second node with a predetermined reference voltage and ground and generates a first sensing voltage by resistance distribution of the voltage of the second node; and a main control unit (MCU) that controls a switching operation of the sensing switch based on the first sensing voltage. The fuse compensation circuit controls a switching operation of the operation switch according to a second sensing voltage according to a voltage of the third node.

The present specification discloses a technique relating to an electrode material mixture composition, wherein the electrode material mixture composition is characterized by including a binder mixture including a large-crystal binder having a crystal size of 50 nm or more and a small-crystal binder having a crystal size of less than 50 nm; and an electrode active material. The electrode material mixture composition may improve mechanical properties of a powder-sheeting film by utilizing different degrees of fibrillization by using a binder mixture in which binders having different crystal sizes are mixed, may improve processability of a calendering process, and thus may provide a secondary battery having excellent resistance characteristics.

The present disclosure provides a separator for a lithium secondary battery, including a porous polymer substrate; at least one inorganic coating layer present on at least one surface of the porous polymer substrate, the inorganic coating layer including inorganic particles and a first particulate binder polymer; and at least one adhesive layer present on at least one surface of the inorganic coating layer, the adhesive layer including a second particulate binder polymer and a non-particulate binder precursor, wherein the non-particulate binder precursor includes an acrylic monomer or oligomer.

An analysis device according to an embodiment may include a memory configured to store at least one instruction and at least one processor configured to execute the at least one instruction, and the at least one processor may acquire text included in content retrieved on a specific site based on a specified search term, acquire, from a learning model, a first parameter indicating a state of an expected change in a market for the search term and a second parameter indicating a degree of the expected change in the market, based on inputting input data according to the acquired text into the learning model, and identify a market indicator indicating the expected change in the market according to the content based on the first parameter and the second parameter.

The method of manufacturing a secondary battery according to the present disclosure comprises the steps of: forming a stack cell by stacking a negative electrode material layer, a current collector, a positive electrode material layer, and a separator in a first direction and sealing the side surfaces thereof with a sealing layer; pressing the stack cell in the first direction; and providing heat to the stack cell in a second direction perpendicular to the first direction to form the sealing layer, wherein the sealing layer comprises a sealing resin.

The battery management apparatus according to an embodiment of the present disclosure includes a profile obtaining unit configured to obtain a differential profile representing a corresponding relationship between a voltage and a differential capacity of a battery; and a control unit configured to determine a feature point included in a preset reference voltage section of the differential profile and determine a state of the battery based on the determination result of the feature point.

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