SK On Patente

A battery pack includes a cell stack in which a plurality of battery cells are stacked; a pack case accommodating the cell stack therein, a partition member partitioning an internal space of the pack case into a plurality of spaces, and a blocking member disposed between the partition member and the pack case to block heat propagation between the plurality of spaces.

A silicon-carbon-containing electrode material according to embodiments of the present disclosure includes a porous carbon structure including pores and a silicon-containing coating layer formed on the porous carbon structure, wherein the peak intensity ratio of the Raman spectrum, expressed as a percentage and as defined by a predetermined equation, is 3% to 18%. Accordingly, the cycle life and capacity characteristics of a lithium secondary battery may be improved.

A battery device includes a cell assembly in which a plurality of battery cells are arranged in a first direction, a case having an accommodation space in which the cell assembly may be accommodated, and a surface pressure member providing surface pressure to the cell assembly, wherein the case may include a partition partitioning the accommodation space, and the surface pressure member accommodates the partition and may be coupled to the partition.

The present disclosure relates to a battery assembly comprising: a plurality of battery cells having a cylindrical shape; a receiving member forming a placement space for receiving the plurality of battery cells; and a receiving case including a receiving space for receiving the plurality of battery cells and the receiving member, a receiving floor forming a bottom surface of the receiving space and including a communication hole, a venting space disposed below the receiving floor, and a communication hole formed on the receiving floor to communicate the receiving space and the venting space.

A pouch type secondary battery is disclosed. One aspect of the present invention provides a pouch type secondary battery including a casing material configured to accommodate an electrode assembly from which electrode tabs are led; and the casing material includes a sealing portion formed on three sides of four sides of the pouch type secondary battery and an close contact portion formed on the remaining one side; and an extending portion protruding perpendicularly with respect to the close contact portion is formed in a portion adjacent to the close contact portion in the sealing portion.

A cathode for a lithium secondary battery includes a cathode current collector; and a cathode mixture layer on at least one surface of the cathode current collector, wherein the cathode mixture layer includes a first cathode mixture layer on the cathode current collector; and a second cathode mixture layer on the first cathode mixture layer, the first cathode mixture layer and the second cathode mixture layer respectively independently include lithium metal phosphate and lithium transition metal oxide as active materials, a weight of the lithium metal phosphate included in the first cathode mixture layer exceeds a weight of the lithium transition metal oxide, the first cathode mixture layer includes a spherical-type conductive material, and the second cathode mixture layer includes a needle-type conductive material.

Methods for manufacturing an electrode for a lithium secondary battery, electrodes for a lithium secondary battery, and lithium secondary batteries including the electrodes are disclosed. In one embodiment, the method for manufacturing an electrode for a lithium secondary batteries may include: forming an electrode active material layer on at least one side of the electrode current collector, forming a plurality of grooves in the electrode active material layer, and rolling the electrode active material layer that includes the plurality of grooves.

Proposed are an additive for a thermal management fluid, the additive including a phosphate-based compound, and a thermal management fluid composition including the same.

The present disclosure provides an electrode for a secondary battery and a lithium secondary battery including the same. The electrode for a secondary battery according to the present disclosure includes an electrode current collector, and an electrode active material layer disposed on one surface of the electrode current collector, and including an electrode active material and a graphene conductive material. The number of layers of the graphene conductive material, as defined by Equation 1, is 2 to 15. Numberoflayers=Lc/D+1 (in Equation 1, Lc represents a grain size (Å) and D represents a d-spacing (Å), calculated from X-ray diffraction (XRD) analysis results of the graphene conductive material)

Provided is a secondary battery. According to one aspect of the present disclosure, the secondary battery comprises an electrode assembly accommodated inside a can, a current collector electrically connected to an electrode tab of the electrode assembly, and a rivet fastened to the current collector and functioning as an electrode terminal, wherein the current collector comprises a first coupling sleeve, the rivet comprises a second coupling sleeve fastened to the first coupling sleeve, and the first coupling sleeve is provided to be inserted into and fastened to the second coupling sleeve in a direction corresponding to a central axis of the electrode assembly.

The present disclosure relates to a cap assembly coupled to a case that accommodates an electrode assembly to cover one open side of the case, the cap assembly comprising: a cap plate including a first hole; a cylindrical terminal portion including an insertion hole and inserted into the first hole to be connected to the electrode assembly; a sheet-shaped first insulating member disposed to face the cap plate; and a heat insulating member disposed between the first insulating member and the terminal portion.

A battery cell includes a can, an electrode assembly disposed within the can, and including a first electrode plate and a second electrode plate, a terminal portion mounted on the can, a first current collector plate connected to the terminal portion and the first electrode plate, and a second current collector plate connected to the can and the second electrode plate. The first electrode plate includes a first uncoated portion bonded to the first current collector plate. The second electrode plate includes a second uncoated portion bonded to the second current collector plate. The first uncoated portion is surrounded by the second uncoated portion.

A battery cell includes an electrode assembly including an electrode tab, a cell case accommodating the electrode assembly, a cap plate coupled to the cell case, an electrode terminal disposed on the cap plate, and a current collector including a terminal connection portion electrically connected to the electrode terminal and a tab connection portion electrically connected to the electrode tab. The tab connection portion includes a step portion recessed toward the electrode assembly, and the electrode tab is bent to cover an outer surface of the step portion and then welded to the step portion on the outer surface of the step portion.

Disclosed are a method for controlling heating of an HVAC system for an electric vehicle and an HVAC system thereof. According to various embodiments, in an operation of the HVAC system including a main heating unit (141) in which a first refrigerant circulates and an auxiliary heating unit (143) in which a second refrigerant circulates, at least one of the first refrigerant and the second refrigerant may comprise at least one of: a natural refrigerant; a hydrofluorocarbon (HFC)-based refrigerant; a hydrofluoroolefin (HFO)-based refrigerant; a hydrochlorofluorocarbon (HCFC)-based refrigerant; a hydrocarbon-based refrigerant that is not a natural refrigerant; and a halon or a perfluorocarbon (PFC)-based refrigerant. Further disclosed is the use of a HVAC system as disclosed herein in an electric vehicle. Further provided is an electric vehicle, comprising the HVAC system as disclosed herein.

A secondary battery according to various embodiments of the present disclosure includes: a battery can configured to accommodate an electrode assembly; a cap plate including a body part having a shape corresponding to an opening of the battery can and an edge part protruding upward along a perimeter of the body part, the cap plate being coupled to the opening; and a sealing gasket disposed between the battery can and the edge part, wherein the battery can may include a crimping part formed by bending at least a partial section of an upper end portion thereof to surround the edge part.

Provided is a composite electrolyte membrane comprising a porous support including a polymer having a melting point of at least 145°C and a coating layer on at least one side of the support, wherein the coating layer includes a polymer binder and hydrophilic oxide particles. The membrane exhibits high heat resistance and improved ionic conductivity, and is suitable for use in electrochemical devices, such as lithium secondary batteries. Experimental results demonstrate excellent capacity retention, stability, and performance compared to conventional polyolefin-based separators, making the membrane advantageous for high-capacity and high-safety battery applications.

A cell case (100) according to an embodiment of the present disclosure may include: a can (200) having a sidewall (220) and an end plate (210) having an internal space (S) accommodating an electrode assembly (400) formed therein; a cap plate (300) disposed opposite the end plate, coupled to the sidewall, and sealing the internal space; and an electrode terminal (500) extending externally by penetrating through a portion of the can, and the electrode terminal may be coupled to the end plate via an insulating resin member (R).

In a method for manufacturing an electrode for a lithium secondary battery, an electrode mixture is prepared by mixing an electrode active material and a prepolymer binder including a polyvinylidene fluoride (PVDF)-based polymer. The electrode mixture is dry-coated onto an electrode current collector to form a preliminary electrode active material layer. The preliminary electrode active material layer is roll-pressed. An electric field is applied to the preliminary electrode active material layer to form an electrode active material layer. The electrode for a lithium secondary battery exhibits improved elasticity and ionic conductivity, thereby improving the cycle life characteristics and electrical properties of the secondary battery.

A multilayered separator for a lithium secondary battery according to embodiments of the present disclosure includes: a porous substrate; a first coating layer disposed on one surface of the porous substrate, and including a first binder, a nitrate compound and a first lithium salt; and a second coating layer disposed on a surface of the porous substrate opposite the surface in contact with the first coating layer, and including a second binder and a second lithium salt.

A secondary battery is disclosed. According to one aspect of the present disclosure, there is provided a secondary battery including: a can including an opening; an electrode assembly including a first hollow and disposed in the can; a cap plate that closes the opening; and an electrode rod extending to pass through the first hollow, wherein the electrode rod includes: a first end portion exposed to the outside of the can and forming an electrode terminal; and a second end portion disposed on an opposite side corresponding to the first end portion.

A battery device is disclosed, the battery device may include a plurality of cell assemblies including a plurality of battery cells; and a housing accommodating the plurality of cell assemblies therein, wherein upper surfaces of the plurality of cell assemblies may be spaced apart from the housing by a certain distance, a first venting passage may be formed in the housing facing the upper surfaces of the plurality of cell assemblies, and a second venting passage may be formed in a space between first side surfaces of the plurality of cell assemblies and the housing.

A device for manufacturing a battery cell is provided. The device includes a first pressing device including a first mold portion configured to press one side of a base material, and a second mold portion including a first protrusion configured to press the other side of the base material and configured to support the base material; and a second pressing device including a third mold portion including a second protrusion configured to press the one side of the base material, and a fourth mold portion including a third protrusion configured to press the other side of the base material, and configured to support the base material, wherein a first width of the first protrusion is greater than a third width of the third protrusion.

A composition for forming a solid electrolyte according to embodiments of the present disclosure includes: a liquid electrolyte including a solvent containing a nitrile compound having an ether group, a first lithium salt including a borate compound, and a second lithium salt different from the first lithium salt; and a monomer having a polymerizable functional group. A solid electrolyte according to embodiments of the present disclosure includes a nitrile compound having an ether group, a first lithium salt including a borate compound, a second lithium salt different from the first lithium salt, and a polymer.

A metal oxide precursor particle according to the present disclosure has a hollow structure, includes nickel, cobalt and manganese, and has a median particle diameter of 20 µm to 40 µm. According to a method for preparing metal oxide precursor particles according to the present disclosure, a mixed solution containing water and a metal source including a nickel source, a cobalt source and a manganese source is prepared. The mixed solution is sprayed into a quartz tube. The quartz tube includes a particle formation region therein, and the temperature of the particle formation region is set to 750 °C to 1100 °C. According to a method for preparing a cathode active material of the present disclosure, the metal oxide precursor particles are pulverized to prepare small-sized metal oxide precursor particles. A mixture including the small-sized metal oxide precursor particles and a lithium source is calcined to prepare lithium metal oxide particles.

A composition for forming a solid electrolyte according to embodiments of the present disclosure includes: a liquid electrolyte including a solvent containing a nitrile compound having an ether group and a lithium salt; inorganic electrolyte particles; and a monomer having a polymerizable functional group. A solid electrolyte according to embodiments of the present disclosure includes a nitrile compound having an ether group, a lithium salt, inorganic electrolyte particles, and a polymer.

The present disclosure relates to a stacking inspection device for a secondary battery. The stacking inspection device for a secondary battery may comprise: a stack table for holding a stacked body formed by stacking sheet-type stacking members, each of which is one of a first electrode sheet, a second electrode sheet, and a separator sheet, in a stacking direction in order to form an electrode assembly; first holders disposed in a row along the first side surface of the stacked body; second holders disposed in a row along the second side surface opposite to the first side surface of the stacked body; a reference line provided along the outer circumference of the stacked body; and an imaging unit for capturing images of the reference line and side boundaries of the stacked body exposed through the first holders and the second holders. In addition, the present disclosure includes a stacking inspection method using the stacking inspection device for a secondary battery described above.

An electrode assembly includes a first electrode, a second electrode, and a separator located between the first electrode and the second electrode. The first electrode, the second electrode, and the separator are wound in a roll shape. The first electrode includes a first coated portion in which a first active material is coated on a first current collector, and a first uncoated portion adjacent to the first coated portion and formed at one side of the first current collector. The first uncoated portion includes a plurality of cut portions each open to an outside and a plurality of flags partitioned by the plurality of cut portions. A length of each of the plurality of cut portions increases in at least one or more sections in a radial direction from a winding center.

The present disclosure provides a thermal barrier and a battery module, wherein the thermal barrier comprises a heat-absorbing layer comprising a hydrogel, wherein the hydrogel comprises an absorbent polymer and water retained in the absorbent polymer, and the hydrogel comprises 3 to 10 parts by weight absorbent polymer based on 100 parts by weight of water.

An electrolyte for a lithium secondary battery according to exemplary embodiments includes an additive including a compound having a specific structure, an organic solvent and a lithium salt. Accordingly, a lithium secondary battery including the electrolyte for a lithium secondary battery exhibits improved low-temperature properties and high-temperature stability.

Disclosed is a filler composition including a silicone polymer and at least one of a filling material and/or a catalyst. A battery assembly capable of delaying or preventing thermal runaway and/or thermal diffusion is also provided. The battery assembly can be a battery module or a battery pack. Further disclosed is a vehicle comprising at least one such battery module or battery pack.

A battery pack (100) includes:a pack unit body (140) including at least one battery cell (141);a first cooling plate (110) including a first cooling path (111), along which a refrigerant is circulated, and a first inlet pipe (112) connected to the first cooling path (111);a second cooling plate (120) including a second cooling path (121), along which a refrigerant is circulated, and a second inlet pipe (122) connected to the second cooling path (121) and sealingly coupled to the first inlet pipe (112);a main supply pipe (130) branching from the first inlet pipe (112) or the second inlet pipe (122) and supplying a refrigerant to the first inlet pipe (112) and the second inlet pipe (122);a side frame (170) facing the pack unit body (140);a cover member (180) disposed between at least of the first cooling plate (110) or the second cooling plate (120) and the pack unit body (140) to cover the pack unit body (140); anda partition wall frame(171) connected to the side frame (170) such that a third venting hole (171a) opens toward the pack unit body (140),wherein the side frame (170) has a first venting hole (170a) and a second venting hole (170b) connected to the outside; andwherein the partition wall frame (171) has the third venting hole (171a) connected to the first venting hole (170a) .

An electrode assembly, and a battery cell and a power source including the same are provided. The electrode assembly includes a first electrode plate wound about a winding axis and including a first uncoated portion without a first electrode active material coated thereon, a second electrode plate wound about the winding axis and including a second uncoated portion without a second electrode active material coated thereon, a separator disposed between the first electrode plate and the second electrode plate, and a plurality of segments formed on at least one of the first uncoated portion or the second uncoated portion. The plurality of segments are arranged such that at least one bottom angle is changed in a winding direction.

Disclosed are a use of a refrigerant, a method, and an apparatus for thermal management of a vehicle battery. The refrigerant comprises at least one of a natural refrigerant; a hydrofluorocarbon (HFC)-based refrigerant; a hydrofluoroolefin (HFO)-based refrigerant; a hydrochlorofluorocarbon (HCFC)-based refrigerant; a hydrocarbon-based refrigerant that is not a natural refrigerant; and a halon or a perfluorocarbon (PFC)-based refrigerant, and can be used for thermal management of the vehicle battery by controlling a temperature of said vehicle battery.

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