Samsung SDI Patente

Disclosed are an apparauta and a method of generating a lithium iron phosphate (LiFePO<4>, 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 lithium in the positive electrode active material. The battery model generator generates a battery model by modeling the LFP battery using a capacitor and a plurality of resistors including an additional resistance component generated based on the state of the lithium in the positive electrode active material.

A secondary battery (10) includes: an electrode assembly (210); a case body (110) accommodating the electrode assembly (210); a cap plate (120) sealing an opening of the case body (110); and a positive electrode terminal (130_1) and a negative electrode terminal (130_2), each of the positive electrode terminal (130_1) and the negative electrode terminal (130_2) being electrically connected to the electrode assembly (210), coupled to the cap plate (120), and protruding in a first direction (D1) from an upper surface of the cap plate (120). The cap plate (120) includes a vent portion (122) located between the positive electrode terminal (130_1) and the negative electrode terminal (130_2). A first length of the case body (110) in the first direction (D1) is longer than a second length of the case body (110) in a second direction (D2) perpendicular to the first direction (D1), and the second length is longer than a third length of the case body (110) in a third direction (D1) perpendicular to each of the first direction (D1) and the second direction (D2).

A secondary battery inspection apparatus includes a first support member configured to support an electrode tab bundle in which a plurality of electrode tabs extending outward from an electrode assembly are stacked from below, a displacement sensor configured to calculate a measurement value indicating a thickness of the electrode tab bundle by pressing the electrode tab bundle with a force from above, and a processor configured to determine whether the electrode tab bundle is normal based on the measurement value calculated by the displacement sensor.

Disclosed are a spacer, a slot die, and a method of coating an electrode plate using a slot die. The spacer is configured to be interposed between the upper die and lower die of a slot die and configured to form a gap between the upper die and the lower die. The spacer may include a spacer body part configured to be coupled to the upper die and the lower die and a plurality of insulating liquid discharge parts provided on one side of the spacer body part and configured to discharge an insulating liquid. When an electrode plate is coated through the slot die, slurry may be discharged through an area of the spacer body part other than the insulating liquid discharge parts and the insulating liquid may be discharged through the insulating liquid discharge parts so that the insulating liquid is coated adjacent to ends of the discharged slurry.

Disclosed are a negative electrode for a rechargeable lithium battery, and a rechargeable lithium battery including the negative electrode. The negative electrode for a rechargeable lithium battery includes a current collector, a first negative electrode active material layer on a first surface of the current collector, and a second negative electrode active material layer on a second surface of the current collector. A difference in the active mass density between the first negative electrode active material layer and the second negative electrode active material layer is in a range of about 0.02 g/cc to about 0.06 g/cc.

A spacer (130) configured to be provided between a pair of adjacent battery cells (110) among two or more battery cells arranged in a preset direction. The spacer (130) includes a spacer body (131) configured to allow a cooling fluid to flow in the spacer body. The spacer body includes opposite surfaces configured to face the pair of adjacent battery cells. The spacer also includes at least one elastic member (133) passing through the opposite surfaces of the spacer body and configured to contact the pair of adjacent battery cells.

A secondary battery includes a wound electrode assembly including a first electrode, a second electrode, and a separator between the first electrode and the second electrode, a case accommodating the electrode assembly, the case including a bottom portion, a sidewall portion connected to the bottom portion, and an opening facing the bottom portion, a first electrode tab connected to the first electrode, and a cap assembly coupled to one end of the sidewall portion to seal the opening, the cap assembly including an insulating washer between the cap assembly and each of the electrode assembly and the first electrode tab, and the insulating washer including a base film and a hard coating layer on a surface of the base film.

A solid-state battery and a method of preparing the solid-state battery, the solid-state battery including a cathode, an anode current collector, and a solid electrolyte layer disposed between the cathode and the anode current collector, wherein at least one of the cathode and the solid electrolyte layer includes a sulfide-based solid electrolyte, and at least one of a solvent or a decomposition product of the solvent, the solvent including a C1-C20 alkane compound containing one or more halogen atoms.

A secondary battery (2) includes a case (100), an electrode assembly (200) inside of the case (100) and including a first electrode (210) and a second electrode (220), a first tab member (240) including a first inner tab member (241) and a first outer tab member (242) extending in a first direction from the first electrode (210), a first terminal (310) protruding outward from the case (100), a first current collector (410) inside of the case (100) and contacting the first terminal, a first inner plate (420) connected to the first current collector (410) and contacting the first inner tab member, the first inner plate (420) has a first thickness in the first direction, and a first outer plate (430) connected to the first current collector (410) and contacting the first outer tab member (242), the first outer plate (430) has a second thickness in the first direction different from the first thickness.

A rechargeable battery, including an electrode assembly, a case accommodating the electrode assembly, the case including one side having an open portion, a cap plate sealing the open portion of the case, the cap plate including a through hole, and a pressure controller in the through hole of the cap plate, the pressure controller being open when the pressure inside the case is higher than or equal to a reference value and closed when the pressure inside the case is lower than the reference value.

A battery module includes: a plurality of battery cells; and a case accommodating the plurality of battery cells, wherein the case includes: a lower plate supporting lower portions of the plurality of battery cells; a side plate defining an accommodating space for the plurality of battery cells together with the lower plate; and a partition wall between the side plate and the plurality of battery cells, the partition wall being spaced apart from the side plate.

A secondary battery including a case, an electrode assembly housed in the case, and a cap assembly sealing the case. The cap assembly includes a cap down above the electrode assembly and a safety vent above the cap down. The safety vent includes a first notching region. The cap down includes a second notching region. Sizes of the first notching region and the second notching region are different.

Some example embodiments provide a negative electrode including a negative electrode current collector; a negative electrode active material layer on the negative electrode current collector and including a negative electrode active material; and an edge portion on the negative electrode current collector and provided at an edge of the negative electrode active material layer, wherein the edge portion includes metal particles that form an alloy with lithium.

A negative electrode active material for a rechargeable lithium battery (100) and a rechargeable lithium battery (100) including the negative electrode active material are provided. The negative electrode active material for a rechargeable lithium battery (100) includes graphite (110) and an amorphous carbon-containing layer (120) surrounding the graphite (110). The amorphous carbon-containing layer (120) includes a first region (130) and a second region (140), which have different R values of Equation 1 (R value = I<D>/I<G>, where I<D> and I<G> are a maximum peak intensity of the D band at a frequency of 1360±50 cm<-1> and a maximum peak intensity of the G band at a frequency of 1580±50 cm<-1>, respectively, obtained by Raman spectroscopy for the negative electrode active material), and the R value of Equation 1 in the first region is 0.5 or less.

Disclosed are a method and apparatus for analyzing impedance of a lithium-ion battery. The method according to embodiments includes a transmission line model (TLM) equivalent circuit fitting operation of analyzing measured impedance data and fitting the analyzed impedance data to a TLM equivalent circuit. The TLM equivalent circuit fitting operation includes deriving, through a complex nonlinear least square (CNLS) method, a value at which a difference between an analytical function of the TLM equivalent circuit and the measurement data is minimized. The method according to embodiments may further include a data verification operation of verifying the measured impedance data using a Kramers-Kronig relation.

Disclosed are an apparatus and a method of estimating a state of charge (SOC) using a lithium iron phosphate (LiFePO₄, LFP) battery model. The apparatus includes: a lithium state recorder configured to record the 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 lithium 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 lithium in the positive electrode active material.

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 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.

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.

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.

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).

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.

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.

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.

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.

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.

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.

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.

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 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.

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.

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.

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.

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.

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 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.