Samsung SDI Patente

The present disclosure relates to a positive electrode for a rechargeable lithium battery, a rechargeable lithium battery including the positive electrode, and a method for manufacturing a positive electrode for a rechargeable lithium battery. The positive electrode includes a positive electrode current collector, a first positive electrode active material layer on the positive electrode current collector, and a second positive electrode active material layer on the first positive electrode active material layer. At least one of the first and second positive electrode active material layers includes a first particle and a second particle, wherein an amount of the first particle in the first positive electrode active material layer is in a range of about 55 wt% or more, and an amount of the second particle in the second positive electrode active material layer is in a range of about 55 wt% or more.

The present invention relates to systems (1) and method for temperature prediction for secondary battery. A system (1) may include: a storage device (11, 21, 25) configured to store a plurality of first data sets related to heat transfer of at least one battery; and a control device (13, 24, 27) configured to generate a plurality of second data sets by performing dimensionless conversion on the plurality of first data sets, and train an artificial neural network-based temperature prediction model based on the plurality of second data sets, wherein temperature of a target battery is predicted based on the artificial neural network-based temperature prediction model, and an aspect of the target battery is modified based on the temperature.

A wireless security device and method and a battery pack may be provided. The wireless security device comprises: a plurality of antennas associated with a battery management system, BMS; an angle-of-arrival estimator configured to estimate an angle of arrival from a signal received through at least one antenna among the plurality of antennas and calculate a reliability index for the angle of arrival; a beam forming controller configured to calculate a beam forming weight and control a phase and an amplitude of the signal based on the beam forming weight; a channel estimator configured to estimate a channel state of the signal and calculate a channel change rate based on the channel state; and an anomaly detector configured to perform anomaly detection for the signal based on the channel state, the channel change rate, the angle of arrival, and the beam forming weight.

The present disclosure relates to a composite substrate for a deposition-type negative electrode, a negative electrode including the composite substrate, and a rechargeable lithium battery including the composite substrate. The composite substrate includes an elastic layer, and a metal layer on the elastic layer. The elastic layer includes a polymer foam and a carbon-based conductive material.

The present invention relates to a secondary battery and a method of fabricating the secondary battery. The secondary battery of includes a case, an electrode assembly accommodated within the case, and a first insulating plate located exterior to the electrode assembly, the first insulating plate comprising a core portion and an insulating portion, the insulating portion having a rigidity less than a rigidity of the core portion, the insulating portion comprising an insulating material, the insulating portion surrounding the core portion.

An apparatus for manufacturing a separator for a rechargeable battery, a method of manufacturing a separator for a rechargeable battery, and a rechargeable battery are provided. The separator includes a porous substrate and a coating layer formed on at least one surface of the porous substrate. The apparatus includes a drying unit of a coating film for the coating layer, wherein the drying unit includes a drying oven providing a drying space for the coating film for the coating layer, and an injector located in the drying oven and having an injection plate having a plurality of discharge holes which inject hot air toward the coating film for the coating layer.

Disclosed is an apparatus (200) for measuring thermal conductivity of a secondary battery (10) using a detachable jig. The thermal conductivity measurement apparatus (200) includes: a plurality of independent thermal conduction blocks (210) arranged to correspond to respective surfaces of the secondary battery (10); a heat source (220) attached to at least one of the thermal conduction blocks (210); and an insulation unit (230) configured to enclose peripheries of the thermal conduction blocks (210). The thermal conduction blocks (210) are configured to independently measure thermal conductivities of the respective surfaces of the secondary battery (10).

The invention relates to a secondary battery (100), a secondary battery module (200), and a method for manufacturing the secondary battery module (200). The secondary battery (100) includes an electrode assembly (110) including a positive electrode and a negative electrode, a case (120) configured to accommodate the electrode assembly (110), and a bending portion (130) formed on a bottom portion of the case (120).

Disclosed are an electrolyte storage device and a method of manufacturing the electrolyte storage device, and more particularly, an electrolyte storage device configured such that a fine pattern is formed inside the electrolyte storage device to increase surface hydrophobicity, thereby preventing an electrolyte from adhering to the electrolyte storage device, and a method of manufacturing the electrolyte storage device.

The present disclosure refers to a battery system (10) including a battery housing (11) including a top cover (20), a plurality of battery cells (12) accommodated within the battery housing (11), wherein each of the battery cells (12) includes a venting side (13) with a venting exit (14) for allowing a venting gas stream (V) to exit the battery cells (12) in case of a thermal runaway (TR), the venting sides (13) facing the top cover (20), at least one pipe (30, 30') filled with a liquid and extending across the battery cells (12) at their venting sides (13), wherein the at least one pipe (30, 30') is configured to rupture and expel the liquid when exerted to the venting gas stream (V), a plurality of cell spacers (40) alternatingly stacked with the battery cells (12), each cell spacer (40) being adapted to absorb the liquid expelled by the at least one pipe (30, 30').

The present disclosure relates to a secondary battery testing apparatus including a case, a drum rotatably disposed in the case, a cable configured to be wound around the drum and having a detection terminal extending outward from the case, an adjustment member connected to the drum and configured to adjust rotation of the drum, and a measurement member connected to the cable and configured to measure a detection signal transmitted through the cable.

A secondary battery includes a battery can that accommodates an electrode assembly, a cap assembly connected to the battery can, a vent portion in the cap assembly, the vent portion being configured to open when an internal pressure of the battery can reaches a predetermined threshold, and a diffusion prevention unit on the vent portion, the diffusion prevention unit being expandable in response to pressure of a gas when the gas and flames are released through the vent portion, and the diffusion prevention unit being configured to block the gas and flames from spreading to an outside.

The present disclosure refers to battery system (100), including a battery housing (11) including a cover element (20), a plurality of battery cells (12) accommodated within the battery housing (11), wherein each of the battery cells (12) includes a venting side (13) with a venting exit (14) for allowing a venting gas stream (V) to exit the battery cells (12) in case of a thermal runaway, the venting sides (13) facing the cover element (20), an extinguishing agent supply (40), a first supply pipe (30) connected to the extinguishing agent supply (40) and extending laterally along the venting exits (14) of the battery cells (12) at a first side, a first outlet pipe (32) for each of the battery cells (12), and the first outlet pipe (32) connected to the first supply pipe (30) and extending towards the venting exit (14) of the associated battery cell (12) such that a free end (34) of the first outlet pipe (32) is located laterally of the venting exit (14) and directed at the venting exit (14), wherein the first outlet pipe (32) is configured to expel an extinguishing agent, supplied by the extinguishing agent supply (40) and the first supply pipe (30), via its free end (34) onto the venting exit (14) when exerted to the venting gas stream (V).

A secondary battery includes an electrode assembly including a first electrode plate, a separator, and a second electrode plate wound together. The first electrode plate of the electrode assembly includes a long uncoated portion and a short uncoated portion having different lengths in a width direction of the first electrode plate. Each of the long uncoated portion and the short uncoated portion of the first electrode plate has a plurality of cut pieces cut in the width direction. Furthermore, a method of manufacturing a secondary battery is comprised.

1. A secondary battery, comprising: a case; an electrode assembly accommodated in the case; a cap plate (300) welded to the case, the cap plate having a welded portion (300a) and a pair of terminals (400), each terminal having a polarity different from the other terminal; and a gasket (500) between the cap plate and each terminal, wherein the pair of terminals includes a first terminal portion (410) connected to the electrode assembly and a second terminal portion (420) extending from the first terminal portion, the second terminal portion being between the welded portion and the first terminal portion.

An electrode assembly and a battery including the same are disclosed. An electrode assembly is formed by winding a laminate having a separator interposed between a positive electrode plate and a negative electrode plate a plurality of times to have a winding center, wherein a cutting shape at a winding end portion of the separator has a shape in which an upper end is removed.

A rechargeable battery includes: an electrode assembly; a can accommodating the electrode assembly in an internal space and including an opening at one side; and a cover portion coupled to the can at the opening, wherein the cover portion comprises a vent comprising metal, wherein the vent comprises a first region and a second region surrounding the first region, wherein the first region includes: a first portion extending in a first direction; and a second portion extending in a second direction intersecting the first direction and crossing the first portion at an intersection area, and wherein an average grain size of a microstructure of the metal in the first region is larger than an average grain size of a microstructure of the metal in the second region.

A battery (2), including a case (100), an electrode assembly (200) inside the case (100), the electrode assembly (200) including an electrode (210, 220), a tab member (301, 302) connected to the electrode (210, 220), the tab member (301, 302) extending from the electrode assembly (200), a cap assembly (400) facing the electrode assembly (200), the cap assembly (400) having a terminal (420, 430), and a current collector assembly (500, 600) between the electrode assembly (200) and the cap assembly (400), wherein the current collector assembly (500, 600) includes a current collecting plate (520, 620) coupled to the tab member (301, 302) and a flexible current collector (510, 610, 710) electrically connecting the current collecting plate (520, 620) and the terminal (420, 430).

A welding device (1000) includes an anvil (1100), and a welding horn (1200) configured to apply ultrasound to weld an electrode plate (100a), a first substrate tab (120), and a second substrate tab (130) together, while pressing the electrode plate (100a), the first substrate tab (120), and the second substrate tab (130) on the anvil (1100). The welding horn (1200) includes a disk-shaped welding head (1300), and a body portion (1400) connected to a central axis of the welding head (1300), wherein the welding head (1300) is rotatable. The disk-shaped welding head (1300) includes a first pressing portion (1310) configured to press a first region located between the electrode plate (100a) and the first substrate tab (120), and a second region located between the electrode plate (100a) and the second substrate tab (130) between the anvil (1100) and the welding horn (1200), and a second pressing portion (1320) configured to press part of a third region located between the first substrate tab (120) and the second substrate tab (130).

A battery includes an electrode assembly, a case accommodating the electrode assembly, the case including a vent hole, and a vent formed of a polymer material, the vent includinga body portion covering the vent hole, and a flange portion extending from the body portion toward a surface of the case, the flange portion being coupled to the case and including at least one protrusion protruding in a thickness direction of a portion of the case coupled to the flange portion.

A secondary battery includes: an electrode assembly including: a first electrode, a second electrode, and a separator between the first electrode and the second electrode; a first horizontal portion at one end of the electrode assembly; and a second horizontal portion having a step difference relative to the first horizontal portion; a can accommodating the electrode assembly; and a first electrode tab connected to the first electrode. The second electrode is coupled to the can.

A secondary battery includes a cell case including an electrode assembly, a vent hole in the cell case, and a safety vent coupled to the vent hole, the safety vent configured to rupture when internal pressure of the cell case is higher than a reference pressure, wherein the vent hole is in a bottom portion of the cell case, and the safety vent does not contact a bottom plate of the cell case when swelling occurs due to an increase in the internal pressure of the cell case.

A rechargeable battery and a battery pack including the same are disclosed. A rechargeable battery includes a case, an electrode assembly accommodated in the case, a cap plate facing the electrode assembly, and a first vent member on the cap plate, and the first vent member is coupled to the cap plate in a snap-fit manner.

A composite positive electrode active material for a rechargeable lithium battery includes a composite positive electrode active material including a first positive electrode active material in a form of single particles and including a lithium nickel-based composite oxide and a second positive electrode active material in a form of secondary particles in which primary particles are agglomerated and including a lithium nickel-based composite oxide. The first positive electrode active material is included in an amount of more than about 50 wt% and less than about 100 wt% based on 100 wt% of the composite positive electrode active material. The second positive electrode active material is included in an amount of greater than 0 wt% and less than about 50 wt% based on 100 wt% of the composite positive electrode active material.

A secondary battery (2) includes a case (100), an electrode assembly (200) accommodated in the case (100), a cap plate (300) coupled to the case (100) and including an inner surface (301) facing the electrode assembly (200) and an outer surface (302) opposite to the inner surface (301), a terminal (400) protruding outward from the cap plate (300) and connected to the electrode assembly (200), a gasket (500) between the cap plate (300) and the terminal (400), and an outer groove (600) that is concave from the outer surface (302) toward the inner surface (301) and surrounds the gasket (500).

A secondary battery, including a case, an electrode assembly accommodated in the case, a terminal connected to the electrode assembly, a cap plate facing the electrode assembly, and an insulating member between the cap plate and the electrode assembly, the insulating member including an accommodating groove in which the terminal is accommodated.

A secondary battery and a method of manufacturing a secondary battery are disclosed. The secondary battery includes: an electrode assembly including a plurality of electrodes that are stacked, the plurality of electrodes each including: a mixture portion having a first width; and an uncoated portion which has a second width equal to the first width and extends from the mixture portion, and a plurality of the uncoated portions are stacked to form an uncoated portion bundle; and a current collecting member which covers at least two surfaces of the uncoated portion bundle and is connected to the uncoated portion bundle.

A secondary battery, including a case, an electrode assembly in the case, a cap plate coupled to the case, the cap plate facing the electrode assembly, a terminal protruding outward from the cap plate, the terminal being connected to the electrode assembly, an insulating member between the cap plate and the terminal, and a first fastening member extending from the insulating member, the first fastening member being coupled to the terminal.

Disclosed are a positive electrode and a rechargeable lithium battery. The positive electrode includes 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 a first positive electrode active material layer adjacent to the positive electrode current collector, and a second positive electrode active material layer facing the positive electrode current collector with the first positive electrode active material layer interposed therebetween. The first positive electrode active material layer includes a first positive electrode active material and a first irreversible positive electrode additive. The second positive electrode active material layer includes a second positive electrode active material and a second irreversible positive electrode additive. An average particle diameter (D<50>) of the first irreversible positive electrode additive is larger than an average particle diameter (D<50>) of the second irreversible positive electrode additive.

A secondary battery includes an electrode assembly, a case accommodating the electrode assembly, the case including an opening, a cap plate sealing the opening of the case, a pair of electrode terminals coupled to the cap plate and electrically connected to the electrode assembly, and a protective member between the electrode assembly and the cap plate.

A secondary battery includes a case, an electrode assembly inside the case, a cap plate coupled to the case, the cap plate sealing the case, a tab member extending from the electrode assembly in a first direction, a terminal protruding outward from the cap plate, the terminal facing the tab member, a support plate in the tab member in a second direction intersecting the first direction, and a connecting member between the tab member and the terminal, the connecting member connecting the tab member and the terminal.

A notching mold (10) comprises a lower plate(110); an upper plate (120) disposed above the lower plate (110); a die plate (410) disposed on the lower plate (120) and supporting a die (420); the die (420); a punch plate (510) between the upper plate (120) and the die plate (410); a punch pusher (530) between the upper plate (120) and the die plate (410); a punch (520) below the punch plate (510) and the punch pusher (530) and above the die plate (410); and a guide post (700) connected to the die plate (410) and the punch (520), wherein the die (420) comprises an opening (OP), wherein the punch (520) is coupled with the punch plate (510), wherein the punch (520) comprises a first region (1A) configured to be inserted into the opening (OP) and a second region (2A) disposed outside the opening (OP), and wherein the guide post (700) is configured to guide movement of the punch (520).

A method and apparatus for manufacturing an electrode assembly for secondary batteries. The method includes: a notching step comprising notching at least one side of each electrode plate of a plurality of electrode plates to form at least one substrate tab on each electrode plate of the plurality of electrode plates; an inspection step comprising primarily selecting a defective product from among the electrode plates each having the at least one substrate tab, a marking step comprising removing a portion of the at least one substrate tab of the electrode plate of the plurality of electrode plates that has been primarily selected as the defective product, and a final inspection step comprising detecting the electrode plate from which the portion of the at least one substrate tab has been removed to secondarily select the defective product.

A positive electrode for a rechargeable lithium battery includes a positive electrode current collector and a positive electrode active material layer on the positive electrode current collector. The positive electrode is a rectangle shape having a horizontal length that is longer than its vertical length and having upper and lower sides that are equal length. The positive electrode active material layer includes two trapezoidal patterns formed in its surface. The two trapezoidal patterns have short sides that are adjacent to each other, and long sides of the two trapezoidal patterns are adjacent to the upper and lower sides of the positive electrode active material layer.

A rechargeable battery (200) includes an electrode assembly (150), and a cap plate (120) defining a terminal hole, a pair of terminals (130, 140) connected with the electrode assembly (150), one of the terminals (130, 140) including a rivet terminal (50) in the terminal hole with a seal gasket (40) between the rivet terminal (50) and the cap plate (120), a terminal plate (60) coupled to the rivet terminal (50), surrounding a part of the rivet terminal (50) at an exterior of the cap plate (120), and having an air layer (80) therein, and an insulator (70) between the cap plate (120) and the terminal plate (60), and overlapping the air layer (80) in a thickness direction of the cap plate (120).

An electrode assembly (100) includes first and second electrodes (110, 120), and a separator (130), the first electrode (110) including a first substrate (S1) including a first active material layer (AM1) and a first non-coated part (NC1), a second substrate (S2) including a first active material layer (AM1) and a second non-coated part (NC2), a first central substrate (CS1) between the other surface of the first substrate (S1) and the other surface of the second substrate (S2), and a first substrate tab (ST1) extending from one end of the first central substrate (CS1), wherein the second electrode (120) includes a third substrate (S3) including a second active material layer (AM2) and a third non-coated part (NC3), a fourth substrate (S4) including a second active material layer (AM2) and a fourth non-coated part (NC4), a second central substrate (CS2) between a portion of the other surface of the third substrate (S3) and the fourth substrate (S4), and a second substrate tab (ST2) extending from one end of the second central substrate (CS2).

Disclosed are a heating sheet of a battery cell for a thermal propagation evaluation and a thermal propagation evaluation apparatus including the same. A thermal propagation evaluation apparatus (100) according to embodiments includes a power source (130), a housing (110) including a cell occupancy space, in which a plurality of battery cells (C1-C5) including a target battery cell are disposed in parallel, and a heating sheet connected to the power source and configured to heat the target battery cell (120) in the housing, wherein the heating sheet includes a cover in a sheet shape having an area corresponding to one surface of the battery cell and a predetermined thickness and a heating member including a heating coil pattern disposed in one region inside the cover and electrically connected to the external power source, and an area of a region in which the heating coil pattern is disposed may range from 5 to 20% of an area of the cover.

An electrode assembly may include a first electrode having a first electrode tab, a second electrode disposed on the first electrode and having a second electrode tab, a first pass electrode disposed on the second electrode and having a first pass electrode tab electrically connected to the first electrode tab, and a separator disposed between the first electrode and the second electrode or between the second electrode and the first pass electrode.

An electrode assembly according to some embodiments may include a first electrode, a second electrode, and a separator between the first electrode and the second electrode. The separator may include a protrusion protruding from the first electrode and the second electrode, and a protective layer may be disposed on the protrusion.

A secondary battery (100), including an electrode assembly (120), a case (110) that accommodates the electrode assembly (120), the case (110) including an opening at at least one side, and a cap plate (130) that seals the opening, wherein the case (110) includes an inner wall (111), an outer wall (112) spaced apart from and surrounding the inner wall (111), a space portion between the inner wall (111) and the outer wall (112), and a connection wall (113) connecting the inner wall (111) and the outer wall (112), the connection wall (113) sealing an upper end of the space portion.