SK On Patente

A battery apparatus is disclosed including a cell assembly including a plurality of battery cells; a housing having an accommodation space accommodating the cell assembly therein; a cooling port allowing a cooling fluid to flow into the accommodation space; a plurality of cell monitoring units disposed in the accommodation space to monitor the plurality of battery cells, respectively; and an antenna disposed outside the accommodation space and performing wireless communication with the plurality of cell monitoring units.

A battery cell according to an embodiment of the present disclosure includes an electrode assembly; a case including at least one opening and including an accommodation portion accommodating the electrode assembly; and a cap assembly coupled to the case, wherein the cap assembly includes a cap plate coupled to the opening; and a cap insulator disposed between the cap plate and the electrode assembly to insulate the cap plate from the electrode assembly, and wherein the cap insulator includes a first insulator formed of a first material, and a second insulator formed of a second material, different from the first material.

A refrigeration oil composition according to embodiments of the present disclosure includes a silane compound represented by Formula 1 below, wherein any one or two of R₁ to R₄ are each independently selected from C₁-C₅ alkoxy groups, and the remaining groups are each independently C₁-C₁₄ alkyl groups.

The present disclosure relates to a battery module. The battery module may include: a housing having an interior space formed therein, and including an inlet through which refrigerant is introduced and an outlet through which refrigerant is discharged; a battery assembly accommodated in the housing; a busbar accommodated in the housing and electrically connected with electrode tabs of the battery assembly; and a busbar frame accommodated in the housing and having a surface on which the busbar is mounted.

An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on the anode current collector and including an anode active material, a binder and a nitrate. A concentration gradient of the binder in a thickness direction from a top surface of the anode current collector to a top surface of the anode active material layer is 0.1 wt%/µm or less. The concentration gradient of the binder is calculated from contents of a dye adsorbed to the binder measured at multiple points along a line in the thickness direction on a cross-section of the anode active material layer through an SEM-EDS and a thickness of the anode active material layer.

The present disclosure relates to a cathode for a lithium secondary battery including a cathode current collector; and a cathode composite layer formed on the cathode current collector, wherein the cathode composite layer includes a first cathode composite layer on a side of the cathode current collector, and a second cathode composite layer on a surface side of the cathode composite layer, wherein the first cathode composite layer includes a first cathode active material of lithium transition metal composite oxide particles in forms of secondary particles in which primary particles are aggregated, and a binder, wherein the second cathode composite layer includes a second cathode active material of lithium transition metal composite oxide particles in forms of single particles, and a binder.

A cathode active material for a lithium secondary battery, a method of fabricating the same, and a lithium secondary battery including the same are provided. The cathode active material for a lithium secondary battery includes a lithium-transition metal oxide particle, and a coating layer formed on a surface of the lithium-transition metal oxide particle and including Li₃PO₄ and an oxide represented by Li_wTi_x(PO₄)₃-(Al₂O₃)_y (0≤w, x≥4/3, y>0, 0<x+y≤6, and 0.125 ≤y/x≤0.5). A content of the lithium phosphate in the coating layer is 10 mol% to 60 mol%.

A cathode active material including: an active material 1 comprising secondary particles; and an active material 2 comprising single particles, wherein the active material 1 and the active material 2 have a bimodal particle diameter distribution, respectively, the active material 1 has an average particle diameter (D50) of 9 µm to 17 µm, and the active material 2 has an average particle diameter (D50) of 2.5 µm to 4 µm, is disclosed.In some implementations, a cathode active material having high packing density may be provided.

A cathode active material for a lithium secondary battery according to the present disclosure includes lithium-metal oxide particles and a coating part formed on the lithium-metal oxide particles and including a metal-containing part and a sulfur-containing part. A metal area ratio of the cathode active material according to a specific equation may fall within a predetermined range. Accordingly, side reactions between the cathode active material and the electrolyte may be suppressed, and the stability and cycle life characteristics of the secondary battery may be improved.

A cathode active material for a lithium secondary battery according to embodiments of the present invention includes lithium-nickel metal oxide particles. The lithium-nickel metal oxide particles have the form of secondary particles in which a plurality of primary particles are agglomerated, and include a tungsten compound at interfaces between the primary particles. When the content of tungsten measured by energy-dispersive X-ray spectroscopy (EDS) satisfies Equation 1, surface stability of the cathode active material is increased, thereby improving high-temperature performance.

The present disclosure relates to a battery assembly. The battery assembly may comprise: a plurality of battery cells arranged along a stacking direction; and a housing case containing the plurality of battery cells and including at least one end plate; wherein the end plate has a length dimension that extends parallel to the stacking direction and forms a first side of the housing case. The at least one end plate has one or more first type of venting holes penetrating it. The battery assembly possesses improved thermal stability, extended battery life and improved structural stability.

A cathode active material for a lithium secondary battery according to embodiments of the present disclosure includes first lithium transition metal oxide particles and second lithium transition metal oxide particles having a median particle diameter (D50) smaller than that of the first lithium transition metal oxide particles. The first lithium transition metal oxide particles and the second lithium transition metal oxide particles each include a lithium-sulfur-metal-containing part and satisfy predetermined relationships of a particle diameter ratio and a sulfur coating amount difference therebetween.

The present disclosure relates to a battery assembly, wherein the battery assembly according to one aspect may include: a plurality of battery cells; and a plurality of barriers, wherein the plurality of battery cells and the plurality of barriers may be stacked in a first direction to form a stack, wherein the plurality of barriers may include one or more first barriers and one or more second barriers, wherein a thickness of the first barrier may be from 25% to 200% of a thickness of the battery cells, and a thickness of the second barrier may be 10% or less of the thickness of the first barrier.

The present disclosure relates to an electrode current collector comprising an electrode sheet including an electrically conductive material, a first pattern portion protruding or recessed in a stacking region provided on at least one surface of the electrode sheet, and a second pattern portion protruding or recessed from the first pattern portion, and to an electrode including the same, wherein an average surface roughness of the electrode sheet in the stacking region is greater than 0.2 µm.

A separator for a secondary battery according to the present disclosure includes a substrate and a coating layer on a surface of the substrate, the coating layer including inorganic particles. The substrate orientation degree, which is calculated from a puncture strength of the separator and a weight per unit area of the substrate, may be within a predetermined range. A secondary battery according to the present disclosure includes an electrode assembly including a cathode, an anode, and the separator for a secondary battery according to the present disclosure. The thermal stability of the separator and the secondary battery may be improved.

A cathode active material for a lithium secondary battery according to exemplary embodiments of the present disclosure includes lithium metal oxide particles and a sulfur (S)-containing compound and a sodium (Na)-containing compound present on the surface or inside the lithium metal oxide particles. The surface portion of the lithium metal oxide particle has a concentration gradient of sulfur (S). The absolute value of the slope of the XPS signal of sulfur (S) in the surface portion is 20 cps/nm to 80 cps/nm.

The present disclosure relates to a secondary battery and a manufacturing method thereof, wherein the secondary battery includes: an electrode; a case having a receiving space, and accommodating the electrode in the receiving space; a current collector including a first protruding member including a first projection and a second protruding member including a second projection; and a cap coupled to the case to allow the first projection and the second projection penetrate through, and covering the receiving space.

An anode for a secondary battery includes an anode current collector, and an anode active material layer disposed on a surface of the anode collector and including an alcohol. In a 1H NMR analysis of the anode active material layer, a sum of a peak area of a first peak observed in a range of 4 ppm to 4.5 ppm and a peak area of a second peak observed in a range of 3.5 ppm to 4 ppm is greater than 0, and 0.15 or less. A peak area of a third peak observed in a range of 1.5 ppm to 2 ppm is greater than 0, and 0.15 or less. A peak area of a fourth peak observed in a range of 1 ppm to 1.5 ppm is greater than 0, and 0.8 or less.

The battery cell may include: a first electrode assembly including a first terminal tab protruding in a first direction; a second electrode assembly which is adjacent to the first electrode assembly in a second direction intersecting the first direction, and includes a second terminal tab protruding in the first direction; a case defining a receiving space that receives the first electrode assembly and the second electrode assembly, and including an opening that is in communication with the receiving space and is opened in a third direction perpendicular to each of the first direction and the second direction; and a cap assembly covering at least a portion of the opening.

The present disclosure relates to a battery assembly. The battery assembly comprises a plurality of battery cells, a barrier, and a housing case configured to accommodate the plurality of cells and at least one first barrier and at least one second barrier. The first and second barrier may each comprise an exterior comprising an endothermic material, and the endothermic material may comprise a hydrogel comprising a polymer and water.

Disclosed is an immersion cooling module and an immersion cooling method. The immersion cooling module includes a housing (10) configured to contain a cooling fluid at a predetermined level and to accommodate one or more battery cells (20) that are disposed to be at least partially immersed in the cooling fluid. The housing (10) has a first end inlet (11) and a second end inlet (12) at opposite sides, respectively. The module further includes: a connection pipe (30) separately coupled below the housing (10), extending from the first end inlet (11) to the second end inlet (12), a connection conduit (41, 42, 43, 44) formed on a lower surface of the housing (10) for each of cooling spaces (L1, L2, L3, L4), with the spaces (L1, L2, L3, L4) being divided by the battery cell(s), so that the cooling fluid is flowable between the spaces and the connection pipe (30); a heat exchanger (50) coupled to the connection pipe (30) and having a cooling fluid outlet formed therein, and a fluid pump (61, 62) coupled to the connection pipe (30) and configured to control a flow direction of the cooling fluid toward the first side and the second side of the heat exchanger (50).

The present disclosure relates to a battery assembly and a method for reducing risk of thermal runaway therein. A battery assembly according to one embodiment of the present disclosure comprises at least two battery cells; and a barrier disposed between the two battery cells, wherein the barrier comprises a sheet-shaped blocking layer, a surface pressure layer stacked on at least one surface of the blocking layer, the surface pressure layer comprises a first region in contact with the blocking layer and a second region which is a region other than the first region, and a protective layer may be stacked on at least a portion of the second region.

An electrode for a secondary battery, a method of fabricating the same, and a secondary battery including the same are provided. The electrode for a secondary battery includes a current collector, an active material layer disposed on the current collector. The active material layer includes an active material, and a protective coating formed on at least a portion of a surface of the active material or at least a portion of a surface of the active material layer and including an aryl-ring-containing metal compound.

The present disclosure relates to a separator, a method for manufacturing the same, and an electrode assembly including the same. The separator according to one aspect comprises: a substrate; and a coating layer formed on at least one surface of the substrate, wherein the coating layer comprises an inorganic material and a first binder, a glass transition temperature of the first binder is 100 °C or less, and the following Equation 1 can be satisfied: 1.2≤DB1/TC≤2.0In Equation 1, D_B1 is a particle diameter (D50) at a volume fraction of 50% in a cumulative particle size distribution of the first binder, and T_c is a thickness of the coating layer.

A system, a use of said system, and a method for manufacturing and drying of one or more electrodes for a secondary battery are disclosed. The system (1) includes a coating portion (30) adapted to apply a coating material (6) to a coating substrate (5) travelling along a path; and a drying portion (40) adapted to dry the coating material (6), wherein the drying portion (40) includes at least one Coanda nozzle (71) that is adapted to spray hot air onto one surface of the coating substrate (5), and wherein the Coanda nozzle (71) includes at least one hot-air blocker (90) that is adapted to selectively block a spray port through which hot air is sprayable.

A cathode active material for a secondary battery includes a plurality of a lithium metal oxide particle. A molar ratio of manganese based on total moles of all metal elements excluding lithium in the lithium metal oxide particle is in a range from 0.15 to 0.3, and a molar ratio of cobalt based on total moles of all metal elements excluding lithium in the lithium metal oxide particle is 0.05 or less. An R-factor of the lithium metal oxide particle is in a range from 0.45 to 0.57.

A cathode active material for a secondary battery includes a lithium metal oxide particle which contains nickel and cobalt and has a single particle structure. A content of cobalt increases in a direction from a particle center to a particle surface in at least a portion of a region between the particle center and the particle surface. The content of cobalt is in a range from 3 mol% to 20 mol%, and a content of nickel is in a range from 60 mol% to 90 mol% among elements of the lithium metal oxide particle excluding lithium and oxygen.

Provided are a composite electrolyte membrane and a lithium secondary battery including the same. According to an aspect of the present disclosure, a composite electrolyte membrane including: a fluorine-based porous support; and a gel polymer electrolyte including a fluorine-based compound is provided.

An active material for a lithium secondary battery according to exemplary embodiments may have a peak ratio index (S) of 100 to 500, as defined by Equation 1 below: S=A/B (wherein A denotes the maximum peak intensity in the 4.2 V to 4.3 V region of the differential capacity (dQ/dV) discharge graph, and B denotes the peak intensity at 4.5 V in the dQ/dV discharge graph). Therefore, the cathode active material may exhibit excellent structural stability and may provide a secondary battery with improved cycle life characteristics.

A cathode active material for a secondary battery according to one embodiment of the present disclosure includes a lithium metal oxide and has a C-axis lattice retention ratio (R<CL>) of 95% to 97%, as defined by Equation 1 below. R CL = C min / C max × 100 <img class="EMIRef" id="51ee46e0-3fd6-40b8-ad8e-5f161359beda-ia01" /> in Equation 1, R<CL> denotes the C-axis lattice retention ratio, and C<min> and C<max> respectively denote the minimum and maximum values of the C-axis lattice constant of the cathode active material, as observed by X-ray diffraction (XRD) analysis while the charge voltage is increased to a terminal voltage.

Proposed is an electrode assembly including a positive electrode plate, a separator, and a negative electrode plate sequentially stacked, wherein the positive electrode plate may include a first side region provided with a positive electrode external-connection non-coated part for electrical connection to an external terminal or lead, a non-coated part in a predetermined portion of a second side region, opposite to the first side region, where an active material layer is not formed, a coated part between the first and second side regions, where an active material layer is formed except for the non-coated part, and a positive electrode insulation coating part formed in the first side region of the positive electrode plate, extending from a boundary between the non-coated part and the coated part toward an end of the first side region of the positive electrode plate.

Provided are a secondary battery and a method of manufacturing the same. According to one aspect of the present disclosure, a secondary battery may be provided, which includes an electrode assembly provided with an electrode tab, a can that accommodates the electrode assembly and has a coupling hole provided in an outer part of one surface facing the electrode tab, and a terminal inserted into the coupling hole and electrically connected to the electrode tab.

A secondary battery is disclosed. According to the present disclosure, there is provided a secondary battery including an electrode assembly accommodated in a case, a current collector electrically connected to the electrode assembly, and a rivet welded to the current collector, wherein the current collector includes a stress relief space configured to accommodate least a portion of a weld bead generated during welding with the rivet.

Proposed is an immersion cooling module including a housing (10) in which an inlet (11) for cooling fluid to flow in and an outlet (12) for cooling fluid to flow out are formed, and in which the cooling fluid is accommodated at a predetermined level so as to form an upper space, a cooling chamber (20) coupled to a lower end of the housing (10), and configured to have a chamber inlet (21) through which the cooling fluid flows in and a chamber outlet (22) through which the cooling fluid is discharged, battery cells spaced apart from each other and immersed in the cooling fluid, and cooling fluid passage parts respectively formed in cooling spaces divided by the battery cells, wherein heat transfer members are arranged at predetermined intervals in a direction perpendicular to a flow direction of the cooling fluid.

A battery pack is disclosed. According to the present disclosure, there is provided a battery pack including one or more battery modules, wherein the battery module includes: a plurality of battery cells disposed between a first cover and a second cover; and an inner column extending in a third direction between adjacent battery cells to dissipate heat transferred from side surfaces of the battery cells to at least one of the first cover and the second cover.

According to embodiments of the present disclosure, a silicon-carbon-containing electrode material, a method for manufacturing the same, and a secondary battery including the same are provided. The silicon-carbon-containing electrode material includes a porous carbon structure; a silicon-containing coating disposed on the porous carbon structure; and a carbon-containing coating disposed on the silicon-containing coating. The electrode material has a color difference (ΔE*) of 5.0 to 19.0 and a Raman intensity ratio (R) of 0.5 to 2.0.

An anode for a secondary battery comprising: an anode current collector; and an anode active material coating comprising: a first anode active material layer disposed on the anode current collector and comprising a first anode active material, and a second anode active material layer disposed on the first anode active material layer and comprising a second anode active material, wherein the first anode active material comprises first silicon-based active material particles, the second anode active material comprises second silicon-based active material particles, wherein the second anode active material layer comprises a silicon-containing active material in a greater amount than the first anode active material layer, wherein a ratio of the content of the first silicon-based active material particles in the total weight of the first anode active material to the sum of the contents of the first silicon-based active material particles in the total weight of the first anode active material and the second silicon-based active material particles in the total weight of the second anode active material is greater than 0 and less than or equal to 0.1 and wherein a mass loading of the second anode active material layer is greater than a mass loading of the first anode active material layer.

Provided are secondary batteries and methods for manufacturing the same. According to one aspect of the present disclosure, a secondary battery may be provided, which includes an electrode assembly to which a current collector is coupled, a can that accommodates the electrode assembly therein and is provided with a coupling hole in an upper surface thereof facing the current collector, and a terminal inserted into the coupling hole and electrically connected to the current collector.

A battery cell includes a cell case including a side wall providing an accommodation space and an upper plate having a through-hole formed therein, an electrode assembly disposed in the accommodation space of the cell case, a first current collector electrically connected to a first electrode tab of the electrode assembly, an electrode terminal electrically connected to the first current collector through the through-hole, and a gasket disposed between the electrode terminal and the upper plate and having electrical insulation properties. The upper plate includes a protrusion protruding in one direction along an edge of the through-hole and a recessed portion recessed in the one direction.

According to exemplary embodiments, the lithium secondary battery electrolyte includes a sulfonyl compound including a cyano group and a lithium salt. According to exemplary embodiments, the lithium secondary battery includes an electrode assembly including a cathode and an anode and the electrolyte for a lithium secondary battery. Accordingly, a lithium secondary battery comprising the lithium secondary battery electrolyte has improved high-voltage characteristics and high-temperature stability.