SK On Patente

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 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.

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.

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.

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.

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 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.

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.

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.

An electrolyte for a lithium secondary battery and a lithium secondary battery are provided. The electrolyte for a lithium secondary battery includes a butyrolactone-based compound including at least one alkenyl group, and a lithium salt. The lithium secondary battery includes an electrode assembly including a cathode and an anode, and the electrolyte for a lithium secondary battery.

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.

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.

A secondary battery according to the present disclosure comprises a cathode, an anode facing the cathode, and a gel polymer electrolyte including a cross-linkable monomer, a polymerization product of the cross-linkable monomer, and a liquid electrolyte. A conversion rate of the cross-linkable monomer is 85% or more.

According to the present disclosure, a secondary battery is provided, which comprises an electrode assembly provided with an uncoated portion, a first current collector and a second current collector each comprising a connection portion electrically connected to the uncoated portion of the electrode assembly, a case having one open side to accommodate the electrode assembly, the first current collector, and the second current collector, and a cap plate covering the open side of the case.

A secondary battery according to various embodiments of the present disclosure may comprise a battery can (100) in which an electrode assembly (200) is housed, and having a terminal hole (111) formed on one side thereof; an electron transfer unit (300) that is disposed inside the battery can, at least a partial region of which protrudes to the outside of the battery can through the terminal hole; and an insulation unit (400) interposed between the electron transfer unit and the battery can.

The present disclosure relates to a cap assembly of a secondary battery. The cap assembly of the secondary battery includes: a current collector including a positive electrode terminal and a negative electrode terminal; a cap plate which the positive electrode terminal and the negative electrode terminal penetrate and which includes a protrusion portion respectively surrounding an outer circumference of the positive electrode terminal and an outer circumference of the negative electrode terminal; a first insulating member which the positive electrode terminal and the negative electrode terminal penetrate and which is disposed between the current collector and the cap plate; a bracket respectively disposed between the protrusion portion and the positive electrode terminal and between the protrusion portion and the negative electrode terminal; and a second insulating member respectively disposed between the bracket and the protrusion portion.

A sulfide-based solid electrolyte comprises 0.1 to 5 mol% of at least one element A that is selected from the group consisting of Group 1 and Group 2 elements, excluding Li, when analyzed by inductively coupled plasma spectroscopy (ICP). Accordingly, the moisture stability of a sulfide-based solid electrolyte may be improved.

A cathode (100) for a lithium secondary battery and a lithium secondary battery comprising the cathode are provided. The cathode comprises a cathode current collector (105), and a cathode active material layer (110) comprising a cathode active material on at least one surface of the cathode current collector. A G value and measured at a surface of the cathode active material layer is less than 2.0.

The present disclosure relates to a battery assembly. Such a battery assembly includes a case in which a receiving space is formed inside, a plurality of battery cells stacked in a predetermined direction, and a cell assembly accommodated in the receiving space. The cell assembly includes a printed wiring circuit board for measuring a voltage of at least one of the battery cells, and a cooling plate which is formed of an electrically conductive material, has a flow path formed therein through which a cooling material moves, and is disposed to face the battery cells. One electrode of each of the battery cells is electrically connected to the printed wiring circuit board through the cooling plate, and the other electrode of each of the battery cells is formed to be electrically connected to the printed wiring circuit board.

A lithium secondary battery, and a method of operating a lithium secondary battery are provided. The lithium secondary battery includes a cathode including a cathode active material layer that includes a lithium-nickel metal oxide, and an anode opposing the cathode. A full width at half maximum ratio or a relative peak area ratio of the lithium secondary battery is 70% or more.

An anode for a lithium secondary battery according to embodiments of the present disclosure includes: an anode current collector; and an anode active material layer disposed on at least one surface of the anode current collector, wherein the anode active material layer includes a first anode active material layer and a second anode active material layer disposed on the first anode active material layer, and the diffusivity (D) of the entire anode active material layer obtained through X-ray microscopy (XRM) analysis is 4.6% to 5.8%.

The present disclosure relates to a battery cell including: a case for receiving an electrode assembly; a terminal portion electrically connected to the electrode assembly and protruding in a predetermined protrusion direction toward one surface of the case; a through-hole penetrating the one surface of the case; a protrusion portion extending in the protrusion direction from a periphery of the through-hole, including an opening hole at one end, and connecting an inside and an outside of the case through the opening hole and the through-hole; and a cover portion detachably coupled to the protrusion portion to cover the through-hole.

A cathode for a secondary battery and a secondary battery comprising the cathode are provided. The cathode a cathode current collector, and a cathode active material layer on a surface of the cathode current collector which comprises a cathode active material. The cathode active material layer comprises a first plurality of pores having a diameter of 0.08 µm or less, and a second plurality of pores having a diameter of greater than 0.08 µm and 1 µm or less. A ratio of a second porosity to a first porosity is in a range from 1.75 to 3.6.

Provided is a battery pack. The battery pack comprises a plurality of battery cells, and a bus bar configured to electrically connect the plurality of battery cells, wherein the bus bar comprises a first segment and a second segment that are alternately repeated in a longitudinal direction, and the first segment and the second segment are tilted in different directions.

A battery cell is disclosed. In some implementations, the battery cell includes: an electrode assembly; a cell case accommodating the electrode assembly; a cap plate covering an open end of the cell case and including at least one through-hole; and a terminal assembly coupled to the cap plate, wherein the terminal assembly includes a terminal electrically connected to the electrode assembly, a bracket disposed around the terminal in a lateral direction of the terminal assembly, and an insulating member disposed between the terminal and the bracket, the cap plate includes a stepped portion formed around the through-hole on a surface of the cap plate facing the electrode assembly, and at least a portion of the bracket is disposed on the stepped portion and coupled to an inner surface of the cap plate.

A secondary battery according to various embodiments of the present disclosure includes: a battery can including a first curved part formed to be curved to have a first radius of curvature on an inner circumferential surface of a side wall; an electrode assembly accommodated inside the battery can; and a cover cap coupled to the side wall, wherein the cover cap includes a curved coupling part having a shape corresponding to at least a portion of the first curved part.

A solid electrolyte for a lithium secondary battery according to embodiments of the present disclosure may comprise a sulfide compound represented by Formula 1 below and may include a PS₄^3-unit and a BS₃^3- unit. Accordingly, the ionic conductivity of a lithium secondary including the solid electrolyte for a lithium secondary battery can be improved. [Formula 1] Li_6-aB_bP_1-bS_5-bX_1-a(in Formula 1, a and b may satisfy 0≤a<1, and 0<b<1, and X may be at least one element selected from the group consisting of F, Cl, Br and I).

The present disclosure relates to a cap for a secondary battery, a method for manufacturing the cap, and a method for assembling a secondary battery. The cap comprises an injection hole that penetrates the cap plate; the inlet portion of the hole has an oblique surface whose roughness is greater than that of the adjacent cap surface. The cap manufacturing method includes: forming the injection hole in the cap plate; shaping the inlet portion so its diameter decreases from inlet to outlet, which faces the interior of the battery housing, and creating an oblique surface inclined to the surrounding cap surface; and surface processing the oblique surface to achieve the desired roughness. The battery manufacturing method comprises: producing the cap as described; coupling the cap to one end of the housing; inserting at least one electrode cell into the housing; and sealing the cap to enclose the cell.

A battery cell according to an embodiment of the present disclosure includes a cell case having a can accommodating an electrode assembly therein and a cap plate connected to the can, and a vent notch formed in at least one of both surfaces of the cap plate, wherein the vent notch includes at least one first notch portion formed based on a first path, at least one second notch portion formed based on a second path, and a connection notch portion connecting the first notch portion and the second notch portion.

Proposed is an immersion cooling module including a housing configured to contain a cooling fluid, and a battery module submerged in the cooling fluid inside the housing, wherein the battery module includes a buffer member provided on stacked surfaces of battery cells and configured to have a buffer space into which an inflow of the cooling fluid is blocked or controllable by a rupture film.

A battery pack includes one or more battery modules. Each of the battery modules includes a plurality of battery cells having a plurality of first electrode terminals and a plurality of second electrode terminals, a first busbar electrically connected to a plurality of first electrode terminals, a second busbar electrically connected to a plurality of second electrode terminals, and a first insulator disposed between the first busbar and the second busbar and configured to electrically insulate the first and second busbars.

A secondary battery is disclosed. According to one aspect of the present disclosure, there is provided a secondary battery comprising a cell assembly comprising battery cells, first and second frames coupled to the battery cells, and a case accommodating the battery cells and the first and second frames, and a housing in which one or more cell assemblies are accommodated, wherein the first frame comprises a first plate portion and a first support portion protruding from an upper surface of the first plate portion and supporting a side surface of the battery cells, and the second frame comprises a second plate portion and a second support portion protruding from a lower surface of the second plate portion and supporting the side surface of the battery cells.