Samsung SDI Patente

A positive electrode active material comprises a first positive electrode active material comprising a first lithium nickel-based composite oxide and being in a form of secondary particles that are agglomerations of primary particles. The primary particles has an average particle diameter of about 0.6 µm to about 1.05 µm as measured by electron backscatter diffraction. The positive electrode active material also comprises a second positive electrode active material including a second lithium nickel-based composite oxide and being in a form of single particles. An average particle diameter (D<50>) of the secondary particles of the first positive electrode active material is greater than an average particle diameter (D<50>) of the single particles of the second positive electrode active material. Based on 100 wt% of a total of the first positive electrode active material and the second positive electrode active material, the positive electrode active material comprises about 10 to about 45 wt% of the first positive electrode active material and about 55 to about 90 wt% of the second positive electrode active material.

The present disclosure provides a method and apparatus for measuring a deformation amount of a tray (80). The method of measuring a deformation amount of a tray (80) for a secondary battery includes: fixing a tray (80) for a secondary battery; moving the tray (80) to a reference position; measuring displacement at a plurality of measurement points on the tray (80); and storing and analyzing data of the measured displacement, calculating a deformation amount, and evaluating a state of the tray (80).

A plate end for cell swelling prevention is provided that absorbs stress caused by cell swelling in secondary batteries. The plate end includes: a laminated part including a curved metal plate having multiple, individual layers; and fixing parts at opposite ends of the laminated part to fix the plate end.

The present disclosure relates to a battery pack, and the technical problem is to prevent thermal runaway from spreading to adjacent battery cells or blocking a vent path and/or a pack vent in the event of thermal runaway in the battery cell. The battery pack according to embodiments includes a housing having a pack vent, a plurality of battery cells accommodated within the housing and arranged side by side such that cell vents thereof are directed in the same direction, a vent path communicating with the pack vent and the cell vent of each of the plurality of battery cells as an empty space between the plurality of battery cells and the housing, and a cooling member including a pipe disposed in contact with the plurality of battery cells and the vent path within the housing and formed of a material that is melted by gas discharged from the cell vent.

A recycled lithium carbonate has an L value of about 96.5 to about 100.8 according to a colorimetric system, and a b value of about 0.2 to about 3.0 according to a colorimetric system. The recycled lithium carbonate may be used in a positive electrode active material for a rechargeable lithium battery.

A negative electrode active material, a rechargeable lithium battery including the same, and a method for manufacturing the same are provided. The negative electrode active material includes a silicon-carbon composite in the form of particle. The silicon-carbon composite includes a secondary particle in which a plurality of primary particles is agglomerated and a carbon coating layer around (e.g., surrounding) the secondary particle. The silicon-carbon composite includes macro pores having a pore diameter of about 50 nm or more. A volume ratio of the macro pores is about 10% to about 50% relative to a total pore volume of the silicon-carbon composite. The primary particle includes a silicon nanoparticle, and the carbon coating layer includes an amorphous carbon.

The present disclosure relates to a rupture pressure measurement apparatus and is directed to providing a rupture pressure measurement apparatus capable of measuring a rupture pressure of a secondary battery in an environment similar to an actual ignition situation. To this end, the present disclosure provides a rupture pressure measurement apparatus including a chamber provided with a secondary battery therein, a heating unit that heats the secondary battery, a pressing unit that presses the secondary battery until the secondary battery is ruptured, and a main sensor that measures a rupture pressure of the secondary battery when the secondary battery is ruptured.

A fire detector (100, 200) includes: a detection device (110), 210); a cover member (120, 230) surrounding the detection device (110, 210); and a conductor wire (240) positioned such that one side thereof contacts at least one area of the cover member (120, 230), wherein the cover member (120, 230) comprises a mesh, and another side of the conductor wire (240) is grounded.

A secondary battery includes a cylindrical can having an open end and a closed end, an electrode assembly accommodated in the can, and a cap assembly. The cap assembly includes a upper cap closing the open end of the can, a lower cap spaced apart from the upper cap and facing the electrode assembly, a vent plate disposed between the upper cap and the lower cap, with a notch being formed in the vent plate, and an insulating gasket inserted between the vent plate and the can. An diameter of the lower cap is less than the diameter of the notch.

An electrode includes a substrate, a first active material layer formed on the substrate, and a second active material layer formed on the first active material layer. A porosity of the first active material layer is greater than a porosity of the second active material layer.

A battery pack includes a housing, a plurality of battery cells accommodated in the housing and each including a vent, a cover coupled to the housing and spaced apart from the battery cells, and a heat-resistant layer on the cover and facing the battery cells.

An electrode for secondary battery includes a substrate layer, an active material layer coated on at least one surface of the substrate layer, and a guide member formed along sides of the active material layer. The guide member includes a polymer cured by exposure to electromagnetic waves.

An electrode includes a strip-shaped substrate extending in one direction, an active material layer formed on at least one side of the substrate, and a spacer including a plurality of protrusions in which the substrate and the active material layer are raised together.

An electrolyte injection apparatus for secondary batteries, the electrolyte injection apparatus being configured to inject electrolyte into an electrolyte injection port (64) on at least one surface of a battery cell (1), the electrolyte injection apparatus including a dispensing unit (100) including a dispensing nozzle (101) configured to inject the electrolyte into the electrolyte injection port (64), a suction unit (200) positioned in a peripheral portion of the dispensing nozzle (101), the suction unit (200) being configured to provide a predetermined suction force, and a suction force generating unit (300) connected to the suction unit (200), the suction force generating unit (300) being configured to generate the suction force.

A negative electrode active material, a negative electrode including the negative electrode active material, and a method for manufacturing the negative electrode active material are disclosed. The negative electrode active material may include a core and a carbon coating layer on the core. The core may include a porous support including a plurality of pores and a silicon on a surface of the porous support. The plurality of pores may include micro pores. A volume ratio of the micro pores of the porous support may be about 50% to about 100% relative to (e.g., based on) a total pore volume of the porous support. The porous support may include a first amorphous (e.g., non-crystalline) carbon, and the silicon may include an amorphous (e.g., non-crystalline) silicon.

The present invention relates to a negative electrode active material, a method for manufacturing the negative electrode active material, and a negative electrode including the negative electrode active material. The negative electrode active material includes porous particles and an amorphous carbon coating layer surrounding the porous particles, wherein the porous particles include metal particles and silicon nanowires in pores of the porous particles, and wherein ends of the silicon nanowires are attached to the metal particle.

A battery module includes a housing, a plurality of battery cells accommodated in the housing and each including a vent, a plurality of bus bars connecting neighboring battery cells of the plurality of battery cells, a cover including an inner cover surface facing the plurality of battery cells, and an outer cover surface opposite the inner cover surface, one or more cover holes passing through the inner cover surface and the outer cover surface and facing the vents, and a cover film facing the one or more cover holes and configured to open and close the one or more cover holes.

Embodiments of the present disclosure provide an electrode assembly including a plurality of positive electrode plates each of which including a positive electrode substrate, a positive electrode active material layer provided on a side of the positive electrode substrate, and a positive electrode uncoated portion where the positive electrode active material layer is not provided. Further, the electrode assembly includes a plurality of negative electrode plates, at least one separator interposed between each of the positive electrode plates and each of the negative electrode plates, and blocking members inserted into one of the positive electrode plates and the negative electrode plates.

A rechargeable battery (100) includes: a case (200) forming an internal space and having an opening (250); a cap plate (310) coupled to the opening (250) in the case (200); and an electrode assembly (400) in the internal space. The case (200) includes: a body (200A) having a flat surface (220) and a non-flat surface (210), the flat surface (220) facing the non-flat surface (210); a first notch (215) in the non-flat surface (210); and a gas discharge portion (211) in the non-flat surface (210) and overlapping the first notch (215). The non-flat surface (210) has a curved structure protruding in a direction away from the flat surface (220).

An electrode assembly includes a first electrode, a second electrode, and a separator between the first electrode and the second electrode. At least one of the first electrode and the second electrode comprises a current collector comprising an uncoated portion, and an active material layer on the current collector. The current collector comprises a resin layer, an upper metal layer provided to a first side of the resin layer, and a lower metal layer provided to a second side of the resin layer. The resin layer comprises a substrate and a plurality of conductive particles in the substrate. The substrate comprises a first region corresponding to the uncoated portion and a second region corresponding to the active material layer, and the conductive particles are disposed in at least one of the first region and the second region.

An apparatus and method for estimating capacity dispersion of a battery cell, in which a relative capacity difference between battery cells in a battery pack is extracted using charge and discharge data in an actual use environment, includes a processor, and a memory configured to store instructions executed by the processor, wherein the processor calculates a partial capacity of each battery cell with respect to a common operating voltage range of the battery cells based on a voltage of each battery cell, and estimates the capacity dispersion of the battery cell using the partial capacity of each battery cell.

A secondary battery (100) includes an electrode assembly (10), a case (110) accommodating the electrode assembly (10), a safety vent (150) formed on a surface of the case (110) and includes a notch (152), and a coating layer (160) disposed on the surface of the case (110) on which the safety vent (150) is formed. The case (110) may include a first surface (210) being open and a second surface (220) being open and opposite to the first surface (210).

A rechargeable battery includes a case and an electrode assembly accommodated in the case. A cap plate seals an opened portion of the case, and an electrode terminal is positioned to the cap plate and electrically connected to the electrode assembly. An insulating member is positioned between the electrode terminal and the cap plate to insulates the electrode terminal from the cap plate, with the insulating member sealing between the electrode terminal and the cap plate, and the insulating member being configured to partially rupture when a pressure inside the case exceeds a certain level.

Aspects herein relate to an electrode assembly (400) and a battery (2) comprising an electrode assembly (400). The electrode assembly (400) includes an electrode (410) having two coated portions that each include an active material layer (414) formed on a substrate (412), with the coated portions being spaced apart from each other by a first distance in a length direction of the electrode (410). A pair of stress buffering layers (430) are disposed on the substrate (412) between the two coated portions and spaced apart from each other in the length direction of the electrode (410) by a second distance that is less than the first distance. An electrode tab (420) is joined to the substrate (412) between the pair of stress buffering layers (430) such that edge portions (422a) on opposite sides of the electrode tab (420) are each positioned on one of the stress buffering layers (430).

A secondary battery module includes: a cell stack including a plurality of battery cells linearly arranged with respect to each other; a module main body including a variable housing accommodating the battery cells, the variable housing having an adjustable length in an arrangement direction of the battery cells, the variable housing supporting the battery cells such that the battery cells are in close contact with each other; a pressure sensor configured to detect a change in pressure of the battery cells applied to the variable housing; a controller configured to output a control signal based on the pressure information received from the pressure sensor; and a housing length adjuster operated by the controller to adjust the length of the variable housing.

A composite positive electrode active material may include a first positive electrode active material including a first lithium nickel-based composite oxide and a second positive electrode active material including a second lithium nickel-based composite oxide, which has an average particle diameter D50 smaller than an average particle diameter D50 of the first positive electrode active material. The first lithium nickel-based composite oxide may include tungsten, aluminum, and boron. An amount of the aluminum in the first positive electrode active material may be from about 0.1 mol% to about 1.45 mol% based on 100 mol% of a total metal, excluding lithium, in the first positive electrode active material. An amount of the boron in the first positive electrode active material may be from about 1.05 mol% to about 2 mol% based on 100 mol% of the total metal, excluding lithium, in the first positive electrode active material.

A battery pack includes a first battery module and a second battery module each including battery cells, busbars electrically connecting the battery cells to each other, and a circuit board positioned between the first battery module and the second battery module. The circuit board includes a tabs electrically connected to the busbars, and each of the tabs includes at least two fastening portions extending from opposite ends of each of the tabs, and the at least two fastening portions extend into a surface of the circuit board such that the tabs are coupled to the circuit board.

A battery pack comprising: - a housing (1); - a plurality of battery cells (2) accommodated in the housing; - a bus bar electrically connecting the plurality of battery cells; - a case (4) mounted on the housing and supporting a battery cell of the plurality of battery cells; - a first space (5) between the battery cell and the case and which provides a space to discharge a gas; and - a second space (6) between the case and the housing.

A conductive material dispersion for a rechargeable lithium battery includes carbon nanotubes as a conductive material and a mixture of a first dispersant and a second dispersant as a dispersant. The second dispersant is an alcohol having 1 to 5 carbon atoms in its main chain. The conductive material dispersion has a viscosity of 500 to 3000 cPs at 25 °C and a specific surface area (SSA) of 260,000 m<2>/kg or more.

A battery tape includes: a base attachment portion to be attached to at least part of a first surface of a battery cell; a first side attachment portion extending from one side of the base attachment portion, and to be attached to one side of a second surface of the battery cell opposite to the first surface; a second side attachment portion extending from another side of the base attachment portion, and to be attached to another side of the second surface; and a reinforcement attachment portion extending from the first side attachment portion, and to be attached to the one side of the second surface to reinforce an adhesive strength of the first side attachment portion.

An adhesive sheet includes a first adhesive layer including a (meth)acrylic binder having a (meth)acrylate group on a side chain thereof, a silicone oligomer, and an oligomer having a glass transition temperature of 10°C or higher. The first adhesive layer has a peel strength ratio of 0.5 or less, which is a ratio of a peel strength of the first adhesive layer with respect to an adherend after the first adhesive layer attached to the adherend is heated at 230°C for 10 minutes and irradiated with UV light versus an initial peel strength of the first adhesive layer.

Disclosed is an adhesive sheet. The adhesive sheet includes a base film; and a first adhesive layer stacked on a first surface of the base film. The base film is a polyethylene naphthalate film, the first adhesive layer includes a (meth)acrylic binder, a photocurable monomer, a heat curing agent, and a photoinitiator, and the photocurable monomer includes a mixture of an aromatic group-containing monomer, a hydrophobic group-containing monomer, and a hydroxyl group-containing monomer.

The rechargeable battery includes a can (110) accommodating an electrode assembly and an electrolyte in an inner space and a cap plate (120) coupled to the can to seal the can. A safety vent (160) is provided in the cap plate and configured to rupture at a predetermined pressure, and a vent guide (170) positioned inside the cap plate and facing the safety vent. The vent guide includes a pair of guide walls (53,56) configured to protrude to the outside of the cap plate when the safety vent is ruptured.

The present invention relates to a battery diagnosis apparatus (20) and method for diagnosing or detecting a condition of a battery. A battery diagnosis apparatus (20) according to an embodiment may include: a measuring device (22) for measuring a first current value (Im) flowing through a charging-discharging path of a plurality of battery cells (11) and a cell voltage value (Ut) of at least one of the plurality of battery cells (11); and at least one processor configured to estimate a second current value (Ib) flowing through a balancing resistor (Rb) connected to the at least one of the plurality of battery cells (11) based on the cell voltage value, estimate a third current value (Ip) flowing through an internal short-circuit resistance (Ri) of the at least one of the plurality of battery cells (11) based on the first current value, the second current value, and a change in charge state of the at least one of the plurality of battery cells (11), and detect an abnormal cell among the plurality of battery cells (11) based on the third current value of the at least one of the plurality of battery cells (11).

A battery and a battery pack including the same are disclosed. A battery of a battery pack having a cooling member includes an electrode assembly and a case in which the electrode assembly is accommodated, and a thermal contact resistance between the case and the electrode assembly in a first portion of the battery adjacent to the cooling member is greater than a thermal contact resistance between the case and the electrode assembly in a second portion of the battery that is farther from the cooling member than the first portion.

The present disclosure refers a method for assembling a battery pack (100) in a battery pack assembly line (210), comprising the steps of: obtaining (S100) battery module frame (10) with at least one accommodation compartment within the battery module frame (10); coupling (S200) the battery module frame (10) in a receiving compartment of a battery pack frame (20) to be releasably coupled to the battery pack frame (20); and inserting (S300) a battery cell stack (40), after the battery module frame (10) is releasably coupled to the battery pack frame (20), in the battery module frame (10) and coupling the battery cell stack (40) within the battery module frame (10) by adhesive force.The present disclosure further relates to a battery pack assembly system (200) and a battery pack (100).

Provided are a positive electrode, and a rechargeable lithium battery including the positive electrode, the positive electrode including a positive electrode current collector and a positive electrode active material layer on the positive electrode current collector. The positive electrode active material layer includes an olivine-based positive electrode active material and a nickel-based layered positive electrode active material. The olivine-based positive electrode active material has a DD (Degree of Divergence) value defined that is greater than or equal to about 19.

A method for preparing a positive electrode active material includes preparing core particles including a lithium nickel-based composite oxide and mixing the core particles and water to wash the core particles. The method further includes removing a portion of the water so that the water is included in an amount of about 1 wt% to about 10 wt% based on a total 100 wt% of the core particles and water to obtain a washed product. The method also includes adding and mixing an aluminum raw material and a metal raw material into an aqueous solvent to prepare a coating solution. The method further includes adding the washed product into a mixer and performing heat treatment at about 300 °C to about 400 °C while or after spraying the coating solution. The metal raw material is a boron raw material or a tungsten raw material.

A secondary battery includes an electrode assembly including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The electrode assembly is accommodated in a case body having opening. A cover is coupled to the case body to close the opening. The case body includes an accommodating part in which the electrode assembly is accommodated and a flange part that extending outward from the accommodating part. At least part of the cover is coupled to the flange part. The flange part comprises at least one coupling part arranged along a periphery of the flange and coupled to a coupling member. At least one avoidance part is formed in the cover such that the at least one coupling part is not covered by the cover.

A positive electrode active material includes a first positive electrode active material having an average particle diameter (D<50>) of greater than or equal to about 10 µm and less than or equal to about 30 µm, with the first positive electrode active material including a first lithium nickel-based composite oxide. The positive electrode active material further comprises a second positive electrode active material having an average particle diameter (D<50>) of greater than or equal to about 5 µm and less than about 10 µm, with the second positive electrode active material including a second lithium nickel-based composite oxide. The positive electrode active material still further comprises a third positive electrode active material having an average particle diameter (D<50>) of greater than or equal to about 0.1 µm and less than about 5 µm, with the third positive electrode active material including a third lithium nickel-based composite oxide. Based on a total weight of the positive electrode active material, a sum weight of the second positive electrode active material and the third positive electrode active material is greater than about 20 wt% and less than about 40 wt%. A powder flow rate measured at 9 kPa using rheometer by adding 200 ml of the positive electrode active material to a 300 ml vessel, fixing the vessel to a device, and moving a blade counterclockwise at a speed of 100 mm/s is greater than or equal to about 4.2.