Samsung SDI Patente

The present disclosure relates to a positive electrode for an all-solid-state battery. The present disclosure includes a positive electrode current collector, and a positive electrode active material layer on the positive electrode current collector. The positive electrode current conductor includes a main body section and a positive electrode tab protruding in one direction from the main body section. The positive electrode active material layer includes a first layer provided on the main body section, and a second layers on the first layer. At least one of the first and second layers includes a positive electrode active material, a solid electrolyte, and a binder. The binder content of the first layer is greater than the binder content of the second layer. The second layer includes a first region adjacent to the positive electrode tab, and a second region which remains after excluding the first region.

Disclosed is an electrolyte for a rechargeable lithium battery, and a rechargeable lithium battery including the rechargeable lithium battery. The electrolyte for a rechargeable lithium battery includes a non-aqueous organic solvent, lithium salt, a first additive, and a second additive .

Disclosed are an apparatus and a method of generating a lithium iron phosphate (LiFePO₄, LFP) battery model. The apparatus includes: a lithium state recorder configured to record a state of lithium (Li) in a positive electrode active material of an LFP battery according to charging or discharging of the LFP battery; and a battery model generator configured to generate a battery model of the LFP battery based on the recorded state of the Li in the positive electrode active material. The battery model generator may generate the battery model by modeling the LFP battery through adding an additional voltage increment corresponding to a charging or discharging path of the LFP battery to an open circuit voltage (OCV), in consideration of the state of the Li in the positive electrode active material.

The present disclosure relates to a secondary battery and a method of manufacturing the secondary battery. The secondary battery includes a case having an opening formed therein and an electrode assembly accommodated in the case. The electrode assembly includes a first electrode, a separator, and a second electrode, with the first electrode being electrically connected to the case. A cap assembly seals an opening formed in the case and is electrically connected to the second electrode. A gasket is interposed between the case and the cap assembly. The cap assembly includes a protrusion extending upward along a perimeter of the cap assembly, and the case includes a crimping portion that surrounds the protrusion and fixes the cap assembly to the case.

A battery system (1) includes a battery module (10) and a measuring device (20) that (i) operates in a sleep mode or an active mode, (ii) performs a state measurement function of the battery module (10) during the active mode, and (iii) deactivates the state measurement function during the sleep mode. A control device (40) controls the measuring device (20) to alternately repeat the sleep mode and the active mode during an idle period of the battery system (1), estimates a full-charge arrival time or a full-discharge arrival time according to a present state of a battery cell (11) included in the battery module (10), and sets a wake-up cycle for transitioning the measuring device (20) from the sleep mode to the active mode using the full-charge arrival time or the full-discharge arrival time.

Disclosed are a positive electrode for a rechargeable lithium battery, and a rechargeable lithium battery including the positive electrode. The positive electrode for a rechargeable lithium battery includes a substrate and a positive electrode active material layer on the substrate. The positive electrode active material layer includes MXene and a positive electrode active material. An amount of the MXene increases from an upper portion to a lower portion of the positive electrode active material layer.

Disclosed are a positive electrode for a rechargeable lithium battery, and an electrode assembly for a rechargeable lithium battery including the positive electrode, and a rechargeable lithium battery. The positive electrode includes a positive electrode current collector, a positive electrode active material layer on at least one surface of the positive electrode current collector, and an insulating layer on at least one surface of the positive electrode current collector. The positive electrode active material layer includes a first positive electrode active material layer having a constant thickness, and a second positive electrode active material layer located at an edge portion of the positive electrode current collector and having a thickness of about 10% to about 80% of the thickness of the first positive electrode active material layer. The insulating layer is disposed on the second positive electrode active material layer.

An apparatus for drying a coated electrode includes a perforated plate nozzle located above a transfer path for the coated electrode. A duct is provided to connect to an area of the perforated plate nozzle that does not face the coated electrode among areas of the perforated plate nozzle. The duct may supply hot air flowing outside opposite ends of the coated electrode to a lower portion of the coated electrode.

The present disclosure relates to a device and a method for detecting an internal resistance of a battery (20). An internal resistance detection device (10) according to embodiments includes: a measuring device (12) configured to measure a state value of a battery (20); and a control device (13) configured to determine a state of charge (SOC) of the battery (20) based on the state value, estimate a lithium ion distribution state within a positive electrode active material of the battery (20) based on the SOC, determine a detection section depending on the lithium ion distribution state, and determine an internal resistance value of the battery (20) based on the state value measured within the detection section.

Disclosed are a porous separator for a rechargeable lithium battery, a method of manufacturing the porous separator, and a rechargeable lithium battery including the porous separator. The porous separator for a rechargeable lithium battery includes a boron nitride nanosheet (BNNS), a boron nitride nanotube (BNNT), and a polymer that is or includes polyimide (PI), aramid, or a combination thereof.

Disclosed herein is a method for detecting fire in ESSs using cloud services. The method for detecting fire in ESSs includes receiving battery status data from battery management systems via a server, and analyzing the received battery status data to determine whether a fire occurs. It is possible to detect whether a fire has occurred in an ESS without installing a separate fire sensor in the ESS.

A composite positive electrode active material having excellent or suitable adhesiveness and electronic conductivity (e.g., electrical conductivity) and a positive electrode including the composite positive electrode active material are disclosed. The composite positive electrode active material may include an active material core and a graphene coating layer coated on the active material core. The graphene coating layer may partially coat the surface of the active material core. The graphene coating layer may include graphene having a surface modified with an adhesive material.

A battery module includes a housing including a cover plate having thermal conductivity, a plurality of secondary batteries accommodated in the housing and each including an electrode assembly, a case accommodating the electrode assembly, a cap plate which seals the case and faces the cover plate, and a pair of terminals installed on the cap plate, a plurality of busbars accommodated in the housing and configured to electrically connect the plurality of the secondary batteries, and a heat conductor between the cap plates of the plurality of the secondary batteries and the cover plate.

Provided is an insulating coating composition, an insulating layer, and a rechargeable lithium battery including the insulating layer. An insulating coating composition includes a boehmite particle and a binder, wherein the boehmite particle has a plate-like structure extending in a first direction and a second direction that crosses the first direction, the boehmite particle has a first width in the first direction, a second width in the second direction, and a thickness in a third direction perpendicular to the first direction and the second direction, a ratio of the thickness to the first width is about 0.8 or less, and a ratio of the thickness to the second width is about 0.8 or less.

A battery apparatus includes a charging path through which a charging current is supplied to a battery bank (B) that includes one or more battery cells (C), a charge control switch (SW_C) positioned on the charging path (300) and configured to selectively allow or block a flow of the charging current, and a processor (100) configured to wake up as the charging current is supplied through the charging path, to turn off the charge control switch, and to monitor cell voltages of the one or more battery cells (C) to detect an abnormal battery cell among the one or more battery cells.

A device for detecting a battery condition may include a storage device storing a battery model that models a voltage change and an internal impedance of a battery as an electrical circuit, a measuring device configured to measure a current value of the battery, and a control device configured to estimate a distribution status of lithium ions within a positive electrode active material of the battery, detect a distortion zone remaining in a boundary portion of two identicalphase regions within the positive electrode active material based on the distribution status, estimate an overvoltage caused by the distortion zone, correct the battery model by using a correction parameter corresponding to the overvoltage, and determine a first state-of-charge (SOC) of the battery by using the battery model and an SOC estimated by integrating the current value.

The present disclosure relates to a positive electrode for a rechargeable lithium battery. The positive electrode includes a positive electrode current collector and a positive electrode active material layer formed on at least one surface of the positive electrode current collector. The positive electrode active material layer includes a first positive electrode active material layer in contact with the positive electrode current collector, and a second positive electrode active material layer disposed on the first positive electrode active material layer. The first positive electrode active material layer includes a first positive electrode active material and the second positive electrode active material layer includes a second positive electrode active material. The DA (Degree of Alignment) value of the second positive electrode active material DA₂ is greater than the DA value of the first positive electrode active material DA₁.

A secondary battery includes a can including a bottom portion and a side portion extending from the bottom portion, an electrode assembly accommodated in the can, a cap assembly coupled to the side portion, and a gasket interposed between the side portion and the cap assembly. The side portion includes a beading portion bent inward between the cap assembly and the electrode assembly, and a crimping portion bent inward at an opening-side end of the side portion. A thickness of an upper region of the side portion above the beading portion is less than a thickness of a lower region of the side portion below the beading portion. The thickness of the upper region of the side portion above the beading portion is less than a thickness of the beading portion.

An electrode (400) includes an electrode plate (200) including a substrate (210) and an active material layer (220) located on a portion of the substrate (210). A protective layer (300) including two or more regions having different thicknesses is provided on the electrode plate (200).

An all-solid-state battery according to an embodiment of the present disclosure includes a positive electrode current collector; a positive electrode active material layer on the positive electrode current collector; a solid electrolyte layer surrounding the positive electrode active material layer, the solid electrolyte layer covering a first top surface and first side surfaces of the positive electrode active material layer; a negative electrode active material layer partially surrounding the solid electrolyte layer, the negative electrode active material layer covering a second top part and second side parts of the solid electrolyte layer, wherein the solid electrolyte layer exposes at least one first exposed surface of the second side parts to the outside; and a negative electrode current collector on the negative electrode active material layer.

The present disclosure refers to a battery system (100). The battery system (100) includes a plurality of battery modules (10). Each of the battery modules (10) includes a plurality of battery cells (12) stacked along a stacking direction (S). First halves of the plurality of battery cells (12) of each adjacent battery module (10) are electrically connected with each other to form a first electric stack (14) and second halves of the plurality of battery cells (12) of each adjacent battery module (10) are electrically connected with each other to form a second electric stack (16). The battery system (100) is configured to selectively connect the first electric stack (14) and the second electric stack (16) in series or in parallel.

The present invention relates to a negative electrode active material for a rechargeable battery, a method of preparing the same, and a rechargeable battery including the same, wherein the negative electrode active material for a rechargeable battery includes a crystalline carbon-containing layer surrounding a hollow cavity; a silicon-based oxide contained within the hollow cavity; and an amorphous carbon-containing layer formed on an outer surface of the crystalline carbon-containing layer.

A negative electrode plate for a rechargeable lithium battery includes a negative electrode active material. The negative electrode active material includes a mixture of a first negative electrode active material, a second negative electrode active material and a third negative electrode active material. The first negative electrode active material includes natural graphite including secondary particles each formed from primary particles, with an amorphous carbon coating layer surrounding secondary particles, and with the first negative electrode active material has an orientation degree of 90 or less and a d002 of 3.356 Å to 3.360 Å, The second negative electrode active material is graphite. The binder includes a (meth)acrylic based binder.

The present disclosure relates to a battery pack (100) manufacturing device and a method of manufacturing a battery pack (100), and a technical object to be achieved is to provide a battery pack (100) manufacturing device which includes a core molding jig (200) having a plurality of molding parts (230) on which a core pack (110) is seated to minimize a melting cycle, thereby increasing productivity and reducing a mold cost by standardizing the core molding jig (200), and a method of manufacturing a battery pack (100). To this end, a battery pack (100) manufacturing device includes a core molding jig (200) including a molding part (230) on which a core pack (110) of which a bare cell (112) and a protection circuit part (114) are coupled is seated, a mold part (300) which fixes the core molding jig (200), and an injection part (400) which is provided at the mold part (300) and performs a hot-melting process on the molding part (230) to form a resin molding portion (120) on the core pack (110), wherein the molding part (230) is formed as a plurality of molding parts (230) so that a plurality of core packs are seated on the plurality of molding parts (230).

A positive electrode active material, a method of preparing the positive electrode active material, and a positive electrode and rechargeable lithium battery each including the positive electrode active material are provided. The positive electrode active material includes a lithium nickel-based composite oxide having a nickel content (e.g., amount) of greater than or equal to about 60 mol% based on 100 mol% of a total metal excluding lithium in the lithium nickel-based composite oxide, the lithium nickel-based composite oxide further including zirconium, and the positive electrode active material has a span ((D₉₀-D₁₀)/D₅₀) value of about 1.10 to about 1.25 in the particle size distribution and is in the form of single particles.

A battery cell cooling unit to be arranged between battery cells is provided. The battery cell cooling unit includes: two facing plates in a space between the battery cells and respectively facing the battery cells; a thermoelectric element between the two facing plates and configured to dissipate heat generated by the battery cells; and an elastic pad between the two facing plates and configured to absorb volumetric expansion caused by swelling of the battery cells.

A battery module includes a housing, a plurality of battery cells arranged in the housing along a first direction, a plurality of cell bus bars connected to the battery cells, a holder arranged on the battery cells and supporting the cell bus bars, a module bus bar including an extending portion connected to the cell bus bars and arranged on the holder, and an adhesive member fixing the extending portion to the holder.

Provided are a separator for a rechargeable lithium battery, and a lithium secondary battery including the separator. The separator includes a porous substrate, and a coating layer located on at least one surface of the porous substrate. The coating layer includes a composition including a binder, a crosslinking agent, and a filler mixture. The filler mixture includes a filler having an amine group, and a filler having a carboxyl group or carboxylate.

An energy storage device according to embodiments may include a battery module including battery cells, and a gas discharging device connected to the battery module. The gas discharging device may include a filling portion filled with an extinguishing agent, a void path for moving exhaust gas discharge from the battery module and the extinguishing agent input from the filling portion, a first vent portion disposed between the filling portion and the void path, and a mixing portion connected to the void path, for mixing the exhaust gas and the extinguishing agent input from the void path and discharging mixed gas to an outside.

The present disclosure relates to a battery abnormality detection apparatus and method, and a battery pack, for precisely detecting an abnormal battery cell. A battery abnormality detection apparatus includes a memory (100) configured to store an instruction, and a processor (200) configured to execute the instruction, detect an abnormality of a target battery cell of battery cells based on a cell voltage of the target battery cell, determine (S200) a size of an interquartile range of cell voltages for the battery cells, and analyze a relative behavior of the cell voltage of the target battery cell with respect to the cell voltages for the battery cells based on the size of the interquartile range.

A battery diagnosis device (20) may include a database (270) configured to store design data (271) during design process for a battery (10), process data (272) collected during a process of manufacturing the battery (10), evaluation data (273) collected during a process of evaluating the battery (10), and field data (274) collected during a field process with the battery (10). A data link unit (260) is configured to link the design data (271), the process data (272), the evaluation data (273), and the field data (274). A processor (220) configured to, by executing an algorithm stored in a memory (230), (i) extract features based on each of the design data (271), the process data (272), the evaluation data (273), and the field data (274) in the order of the field data (274), the evaluation data (273), the process data (272), and the design data (271), and (ii) generate battery status information including information about the cause of deterioration of the battery (10) and the timing of deterioration of the battery (10) based on the extracted features.

A device (1) for measuring pressure of a battery cell (10) includes: a lower substrate (300) configured to accommodate a battery cell (10) thereon; an upper substrate (200) spaced apart from the lower substrate (300); a connection shaft (100) vertically coupling the lower substrate (300) and the upper substrate (200); and a first load cell (220) configured to measure force applied to the upper substrate (200).

Disclosed are a positive electrode active material, a positive electrode, and a rechargeable lithium battery. The positive electrode active material includes a first positive electrode active material including a lithium iron phosphate-based compound, a second positive electrode active material including a lithium nickel based composite oxide, and an irreversible positive electrode additive. A weight ratio (a/b) of the first positive electrode active material (a) to the second positive electrode active material (b) is about 1.5 to about 8.5. The irreversible positive electrode additive is included in an amount of about 0.1 wt% to about 1.9 wt% based on 100 wt% of the positive electrode active material.

The present disclosure relates to a positive electrode for an all-solid-state battery, an all-solid state battery including the positive electrode, and a method for manufacturing the positive electrode for an all-solid state battery. The positive electrode includes a positive electrode current collector and a positive electrode active material layer on the positive electrode current collector, wherein the positive electrode active material layer includes a positive electrode active material, a sulfide-based solid electrolyte, a binder, and an additive. The additive includes metal-acetylacetonate.

A dark current detection apparatus, a battery management system, and a battery pack, having a circuit topology capable of detecting an increase in dark current due to the loss of a dark current blocking function of a dark current blocking element. A dark current detection apparatus can include a voltage monitoring circuit that outputs a voltage monitoring signal having a variable magnitude, the variable magnitude varying according to a monitoring voltage of a monitoring node connected to the dark current blocking element, and a processor that determines whether the dark current occurs based on the voltage monitoring signal output from the voltage monitoring circuit.

A negative electrode active material comprising: a composite that includes a carbon-based material and silicon nanoparticles. The silicon nanoparticles have a pipe-shaped structure extending in one direction by a length. A wall portion of the silicon nanoparticles includes an inner wall forming a through hole having a diameter, and the wall portion has a thickness from the inner wall to an outer wall. Also disclosed is a negative electrode comprising a current collector having a negative electrode active material layer comprising the negative electrode active material on it. Further disclosed is a rechargeable lithium battery comprising the negative electrode and a positive electrode.

A secondary battery having a degassing space formed inside a battery can, the battery can accommodating an electrode assembly. Using one or more gas guide parts formed inside the battery can, the secondary battery prevents the expansion of an accident by lowering pressure and discharging of gas inside the battery can, even when the electrode assembly expands due to an event, such as a fire or the like. The degassing space that accommodates the electrode assembly opens outward, the electrode assembly can be accommodated in the battery can, and a cap assembly can be mounted on the battery can while in contact with the electrode assembly. The degassing space also has a gas vent part, and the one or more gas guide parts guide gas generated in the battery can toward the gas vent part, the one or more gas guides located on an inner surface of the battery can.

A positive electrode active material may include a first positive electrode active material comprising a first lithium transition metal composite oxide and having an average particle diameter D<50> from 9 µm to 20 µm and may comprise a second positive electrode active material comprising a second lithium transition metal composite oxide and having an average particle diameter D<50> from 1 µm to 8 µm. A particle diameter D<20> of the positive electrode active material may be from 1.0 µm to 5.0 µm.

A method of kneading an electrode mixture capable of controlling the fiberization state of a binder to improve the characteristics of a dry electrode film, and a method of manufacturing a dry electrode film and a dry electrode including the same are provided. The method of kneading an electrode mixture includes performing a kneading process on the electrode mixture, obtaining a processed image of the electrode mixture on which the kneading process has been performed, determining a fiberization state of the binder included in the obtained processed image, and controlling process conditions of the kneading process based on the determined fiberization state of the binder.

The present disclosure a battery pack including a holder that may be universally applied to various types of secondary batteries. The battery pack includes a plurality of secondary batteries, a housing accommodating the plurality of secondary batteries, and a holder disposed within the housing and supports the plurality of secondary batteries, wherein the holder includes one or more short sides extending in a first direction and a plurality of long sides connected to the short sides and extending in a second direction, and wherein the holder defines one or more accommodating spaces where the plurality of secondary batteries are provided through the short sides and the long sides.