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Cylindrical-Type Lithium Secondary Battery, and Battery Pack Comprising the Same

Resumen de: US20260112703A1

A lithium secondary battery includes: a battery case; an electrode assembly accommodated in the battery case; and an electrolyte. The electrode assembly includes a positive electrode including a positive electrode active material, a separator, and a negative electrode including a negative electrode active material. The electrolyte includes LiPF6, and ethylene carbonate. The lithium secondary battery has a form factor ratio of a diameter (r) to a height (h) of the battery case that is 0.4 or more, and satisfies Equation (1):5.6≤hrWLiPF⁢6WEC×WEL×100≤8.6WLiPF6 is an amount of the LiPF6 expressed as a percentage relative to a total weight of the electrolyte. WEC is an amount of the ethylene carbonate expressed as a percentage relative to the total weight of the electrolyte. WEL denotes the total weight (g) of the electrolyte in the lithium secondary battery. A battery pack comprises the lithium secondary battery.

ACID SURFACE TREATMENT OF SOLID ELECTROLYTES

Resumen de: US20260112773A1

0000 Described herein are acid-treated solid-state electrolytes, processes for acid-treating solid-state electrolyte thin films, and electrochemical devices comprising acid-treated solid-state electrolyte thin films.

RECYCLED GRAPHITE SURFACE REPAIR AND CONDUCTIVE CARBON SEPARATION

Resumen de: US20260109608A1

0000 A process to make battery-grade graphite from black mass. The process entails spheronizing graphite derived from black mass to yield spheronized graphite, classifying the spheronized graphite to remove conductive carbon fines, and optionally coating the resulting bulk graphite to reduce its specific surface area.

Rapid Cooling and Strong Heat Insulation Device and Method for Emergency Disposal After Thermal Runaway Warning of Energy Storage Lithium-Ion Battery

Resumen de: US20260112724A1

Disclosed is a rapid-cooling and heat-insulating device and method for emergency disposal after a thermal-runaway warning of energy-storage lithium-ion batteries. The device includes a battery-pack case, multiple cooling and heat-insulating modules, a bottom liquid-cooling plate, a cooling system, and a thermal-runaway processing module. Each cooling and heat-insulating module has two liquid-cooling plates with an aerogel sheet sandwiched between them. A battery pack is tightly inserted between two adjacent modules. The condenser and compressor preliminarily cool the cooling medium, while semiconductor devices and phase-change materials assist in cooling branch pipelines. In operation, one liquid-cooling plate contacts the side surface of a battery row to rapidly cool it after a warning, preventing thermal runaway. When thermal runaway occurs, the aerogel sheet and the other liquid-cooling plate block heat transfer to neighboring batteries, thereby suppressing propagation of thermal runaway within the pack.

ENERGY STORAGE SYSTEM AND POWER SUPPLY DEVICE

Resumen de: WO2026081325A1

An energy storage system and a power supply device, which belong to the technical field of power supplies. The energy storage system comprises an insulation detection circuit (14), which switches and connects to a node close to a main positive line (V+) or close to a main negative line (V-) by means of a grounding terminal, such that among battery assemblies (11) connected in series, even when insulation failures occur in battery cells of the battery assemblies (11) (i.e., the battery assemblies at two ends) close to the main positive line (V+) or close to the main negative line (V-), changes in insulation parameters of the energy storage system can be accurately detected. In this way, insulation failures occurring in battery cells at all positions can be detected, thereby mitigating the problem of insufficient insulation monitoring precision due to a low reduction in insulation resistance caused when insulation failures occur in the battery cells of the battery assemblies (11) at the two ends. In addition, since the precision of insulation monitoring is improved, even if there is external interference, changes in the insulation resistance can still be identified.

POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE SLURRY, POSITIVE ELECTRODE SHEET, BATTERY, AND VEHICLE

Resumen de: WO2026081388A1

The present application belongs to the technical field of batteries, and provides a positive electrode active material, a positive electrode slurry, a positive electrode plate, a battery, and a vehicle. The positive electrode active material comprises lithium manganese iron phosphate and lithium nickel cobalt manganate. The mass ratio of the lithium manganese iron phosphate to the lithium nickel cobalt manganate is (50-95):(5-50). The general chemical formula of the lithium nickel cobalt manganate is LiNiaCobMn( 1-a-b) )O2, 0.6≤a<1, 0

PREPARATION METHOD FOR LITHIUM MANGANESE IRON PHOSPHATE POSITIVE ELECTRODE MATERIAL, POSITIVE ELECTRODE MATERIAL, AND LITHIUM-ION BATTERY

Resumen de: WO2026081418A1

The present application provides a preparation method for a lithium manganese iron phosphate positive electrode material, a positive electrode material, and a lithium-ion battery. The preparation method comprises the following steps: (1) performing sand-milling treatment on first slurry to obtain second slurry; and (2) performing spray drying and three-stage sintering on the second slurry to obtain a lithium manganese iron phosphate positive electrode material, wherein the first slurry comprises a lithium source, a manganese source, an iron source, a phosphorus source, and a solvent. In the preparation method provided by the present application, the lithium manganese iron phosphate positive electrode material having a wide particle size distribution, high conductivity and high compaction density is obtained.

DUAL-GRADIENT POSITIVE ELECTRODE PRECURSOR MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF

Resumen de: WO2026081417A1

The present application provides a dual-gradient positive electrode precursor material, a preparation method therefor, and a use thereof. The dual-gradient positive electrode precursor material comprises a gradient inner core and a gradient outer shell covering the gradient inner core. The gradient outer shell comprises an inner surface and an outer surface, wherein the inner surface is close to the gradient inner core, and the outer surface is away from the gradient inner core. The gradient inner core comprises a nickel element, a manganese element, and a doping element, and the gradient outer shell comprises a nickel element, a cobalt element, and a manganese element. From the core center of the gradient inner core to the outer surface of the gradient outer shell, the content of the nickel element gradually decreases, and the content of the manganese element gradually increases; from the core center of the gradient inner core to the surface of the gradient inner core, the content of the doping element gradually decreases; and from the inner surface of the gradient outer shell to the outer surface of the gradient outer shell, the content of the cobalt element gradually increases. The dual-gradient positive electrode precursor material of the present application allows the structural stability of the material to be significantly improved by means of a dual-gradient design in terms of composition and structure, thereby significantly improving the electrochemical performance of

SEPARATOR, AND PREPARATION METHOD THEREFOR AND USE THEREOF

Resumen de: WO2026082045A1

A separator, and a preparation method therefor and a use thereof. In the separator, by selecting a wetting agent in a coating, defining the amount of the wetting agent, and defining the proportional relationship between the particle size D of PMMA particles and the thickness H of a coating base layer, the breakdown strength of the separator is enhanced, and the influence of the wetting agent on the insulating performance of the separator is avoided. Compared with a conventional separator in which a base film, a heat-resistant coating and an adhesive coating are applied multiple times in a layered manner, by means of mixed application of inorganic particles and large PMMA particles, the coating is simplified, the bonding and heat resistance requirements on the coating are satisfied, the production cost of the separator is reduced, and there is no higher requirement on a production device.

SECONDARY BATTERY

Resumen de: US20260112634A1

A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a positive electrode active material layer. The electrolytic solution includes an aqueous solvent. The positive electrode active material layer includes a positive electrode active material and a positive electrode binder. The positive electrode active material includes a lithium-containing compound which a lithium ion is to be inserted into and extracted from. The positive electrode binder includes a polymer compound. The polymer compound includes a repeating unit represented by Formula (1), a repeating unit represented by Formula (2), or both. A solubility of the polymer compound in 100 g of water is less than or equal to 1 g. A ratio of a volume density of the positive electrode active material layer to a true density of the positive electrode active material is greater than or equal to 30% and less than or equal to 70%.

BATTERY, BATTERY MODULE AND ELECTRICAL DEVICE

Resumen de: WO2026081908A1

Provided in the present application are a battery, a battery module and an electrical device. The battery comprises a battery cell and a battery case, wherein the battery cell is located in an accommodating cavity of the battery case and comprises first side surfaces and second side surfaces which are connected to each other, the area of the first side surface being greater than that of the second side surface; the battery case comprises a top cover, a side housing and two first side plates; the top cover is welded to the battery cell; the side housing is welded to the top cover, the side housing comprises a bottom plate and two second side plates, the bottom plate and the top cover are spaced apart in the direction of height of the battery, the two second side plates are spaced apart from each other in the direction of length of the battery, each second side plate has one end connected to the bottom plate and the other end connected to the top cover and is opposite one of the second side surfaces, and the bottom plate, one of the second side plates, the top cover and the other second side plate are sequentially connected to form a main case; and the two first side plates are spaced apart from each other in the direction of width of the battery, the two first side plates respectively abut against the opposite first side surfaces, at least one of the first side plates is welded to the main case, and a weld seam of the first side plate welded to the main case is an annular weld

SECONDARY BATTERY DIAGNOSING APPARATUS AND METHOD

Resumen de: US20260112909A1

A secondary battery diagnosing apparatus includes a thickness sensor configured to sense a change in thickness of a secondary battery according to a volume change of a negative electrode active material while the secondary battery comprising a negative electrode active material containing silicon or silicon oxide is being charged or discharged; and a processor configured to estimate a capacity ratio, which is a ratio of a capacity provided by the silicon or the silicon oxide to a capacity of the secondary battery provided by the negative electrode active material, using a sensing result of the thickness sensor, and diagnose the state of the secondary battery based on the capacity ratio.

CHARGING METHOD AND TERMINAL DEVICE

Resumen de: US20260112900A1

This application relates to a charging method. In one example, a first terminal device includes a battery, a first switched-capacitor circuit, and a wired charging interface. The first switched-capacitor circuit is electrically connected between the battery and the wired charging interface. The wired charging interface is connected to a second terminal device through an on-the-go (OTG) data cable. The method includes: in response to a user selecting a reverse charging mode of the first terminal device, determining that the first terminal device is a primary device that is in an OTG connection and that is configured to provide electric energy; and controlling the first switched-capacitor circuit to increase a first output voltage of the battery to a second output voltage and output the second output voltage to the wired charging interface, to transmit the second output voltage to the second terminal device through the OTG data cable.

CARBON NANOTUBE DISPERSION AND PREPARATION METHOD THEREOF

Resumen de: US20260109607A1

The present invention relates to a carbon nanotube dispersion and a preparation method thereof, wherein the carbon nanotube dispersion includes carbon nanotubes, a first dispersant which is a cellulose-based dispersant, a second dispersant containing hexafluoropropylene (HFP) as a repeating unit, and a solvent, and the carbon nanotube dispersion of the present invention has a low initial viscosity and a low viscosity change rate, and thus, is excellent in storage stability and processability.

ANODE COMPOSITION FOR LITHIUM ION SECONDARY BATTERY, ANODE SLURRY, ANODE, AND LITHIUM ION SECONDARY BATTERY

Resumen de: US20260112629A1

Disclosed is a negative electrode composition for a lithium ion secondary battery, a negative electrode slurry including the negative electrode composition for the lithium ion secondary battery, a negative electrode for the lithium ion secondary battery, and the lithium ion secondary battery. The negative electrode composition includes a negative electrode active material, a conductive material, and an aqueous binder. The conductive material includes a pre-dispersion solution containing a specific type of dispersant and the aqueous binder includes a specific content of (meth)acrylamide. The negative electrode composition for a lithium ion secondary battery may contribute to improving phase stability and suppressing volume expansion according to the charging and discharging of a battery.

Disordered Rocksalt Material and Method of Forming It

Resumen de: US20260112620A1

0000 A composition comprising a disordered rock salt having a cation comprised of lithium and at least one other metal and an anion comprised of oxygen having a coating comprised of a metal fluoride, a metal oxyfluoride or combination thereof may be made by a dry or wet method. The methods comprise intermixing a metal fluoride and a disordered rock salt and heating to a temperature to react a metal fluoride with the DRS. The method may form a spinel in addition to the metal fluoride or metal oxyfluoride, when in the presence of a base such as ammonium.

LITHIUM-ION SECONDARY BATTERY POSITIVE ELECTRODE MATERIAL AND METHOD FOR MANUFACTURING SAME, LITHIUM-ION SECONDARY BATTERY POSITIVE ELECTRODE, AND LITHIUM-ION SECONDARY BATTERY

Resumen de: US20260112611A1

Provided is a positive electrode material for a lithium ion secondary battery, including aggregated particles including aggregated multiple primary particles of a positive electrode active substance containing lithium iron phosphate coated with a carbonaceous film, the positive electrode active substance having a prescribed composition containing lithium iron phosphate, the positive electrode material having a change rate of a lattice area of a b-c axis plane before charging and after full charging (((lattice area before charging-lattice area after full charging)/lattice area before charging)×100) of 1.10% or more and 1.33% or less. The positive electrode material has excellent cycle characteristics and high input and output characteristics in using as a positive electrode of a lithium ion secondary battery.

BATTERY MAIN BOX, CHARGE-DISCHARGE CIRCUIT, AND POWERED DEVICE

Resumen de: US20260112717A1

0000 A battery main box, a charge-discharge circuit, and a powered device. The battery main box includes two first electrode circuits and one second electrode circuit. A switch is connected between the two first electrode circuits. The two first electrode circuits are respectively configured to be connected to two powered loads and two batteries, and the second electrode circuit is configured to be respectively connected to the two powered loads and the two batteries. The battery main box in the embodiments of the present application includes the two first electrode circuits and the one second electrode circuit, and the switch is connected between the two first electrode circuits.

ACOUSTIC SIGNAL BASED ANALYSIS OF FILMS

Resumen de: US20260110665A1

Systems, techniques, and computer-implemented processes are provided for acoustic signal based analysis of thin-films, electrode coatings, and other components of batteries. Data analytics on signals obtained by ultrasound excitation of materials is used to analyze electrode coating parameters, analyzing separators, and other battery components. Using the disclosed techniques in battery manufacturing and production can lead to reduction in wastage of damaged/scrapped battery cells and shorten production time.

Power Distribution for Modular Storage

Resumen de: US20260112922A1

A power distribution device that couples to storage units is provided. The power distribution device a battery charger that indirectly charges batteries, such as for personal electronic devices. The device includes a top panel with a recess that receives the personal electronic devices. The device also includes interface components to couple the device to a modular tool storage unit.

METHOD FOR PRODUCING SULFIDE SOLID ELECTROLYTE, SULFIDE SOLID ELECTROLYTE, ALL-SOLID-STATE BATTERY, AND METHOD FOR SELECTING RAW MATERIAL COMPOUND FOR USE IN PRODUCING SULFIDE SOLID ELECTROLYTE

Resumen de: US20260112689A1

A method for producing a sulfide solid electrolyte according to an embodiment of the present invention is a method for producing a sulfide solid electrolyte, including: preparing a composition containing P, S, N, an element A, and an element M; reacting the composition to obtain an intermediate; and heating the intermediate to obtain a sulfide solid electrolyte, where the composition includes a raw material compound containing N, the element A, and the element M. A represents at least one element selected from the group consisting of Li, Na, and K. M represents at least one element selected from the group consisting of Al, Ta, Si, Sc, Mg, Nb, B, Hf, C, P, Zr, and Ti.

SHELL ASSEMBLY, ENERGY STORAGE DEVICE AND ENERGY STORAGE SYSTEM

Resumen de: AU2024349446A1

Disclosed in the present application are a shell assembly, an energy storage device and an energy storage system. The shell assembly defines an accommodating space, which is adapted to accommodate a battery cell. The shell assembly comprises: a first shell, wherein the first shell comprises an inner wall of the first shell and an outer wall of the first shell, which are arranged opposite each other; and a first reinforcing structure, wherein the first reinforcing structure is arranged on the outer wall of the first shell, is adapted to reinforce the rigidity of the shell, and is provided with a wall-hanging structure, the wall-hanging structure being adapted in such a way that the energy storage device is fixed to a wall surface by means of the wall-hanging structure.

BATTERY CASE AND VEHICLE

Resumen de: WO2026081971A1

Disclosed in the present application are a battery case and a vehicle. The battery case comprises a case body and a beam body. The case body at least comprises a case bottom wall and case side walls, the case bottom wall and the case side walls enclosing an accommodating cavity, and the accommodating cavity being used for accommodating batteries. The beam body is fixedly arranged within the accommodating cavity, and the beam body comprises an upper beam and a lower beam that are jointed, the upper beam and the lower beam each having a U-shaped structure, and the opening of the upper beam and the opening of the lower beam being arranged facing each other; at least part of beam side walls of the upper beam overlap at least part of beam side walls of the lower beam; at least part of the overlap sections of the beam side walls of the upper and lower beams is arranged in a direction perpendicular to the case bottom wall; the beam side walls of the lower beam are located between the two beam side walls of the upper beam; and a ratio L1/L2 of the height L1 of the beam side walls of the lower beam to the height L2 of the upper beam is 0.06-1. The battery case has reduced costs while having improved structural strength.

BATTERY CASE

Resumen de: WO2026081890A1

The present application relates to the technical field of batteries, and discloses a battery case, comprising a surrounding frame, a bottom plate, a middle beam, and a first heat insulation plate. The surrounding frame is configured to be annular. The bottom plate is connected to the surrounding frame. The bottom plate and the surrounding frame define an accommodating space. The bottom plate comprises a heat exchange plate. In a direction perpendicular to the bottom plate, the heat exchange plate and the accommodating space are arranged opposite to each other. Two ends of the middle beam in a length direction are respectively connected to the surrounding frame so as to partition the accommodating space. The first heat insulation plate is arranged between the middle beam and the heat exchange plate. A thermal conductivity coefficient of the first heat insulation plate is less than that of the heat exchange plate. The middle beam has a first top wall and a first bottom wall. The first top wall and the first bottom wall are both arranged parallel to the bottom plate. The first bottom wall is arranged facing the bottom plate. The first bottom wall, the first heat insulation plate, and the heat exchange plate are fixedly connected by means of riveting connectors. In the direction perpendicular to the bottom plate, the dimension of the first heat insulation plate is D1, the dimension of the heat exchange plate is D2, and the dimension of the first bottom wall is D3, and the followi

NEGATIVE ELECTRODE MATERIAL FOR NONAQUEOUS SECONDARY BATTERIES, NEGATIVE ELECTRODE FOR NONAQUEOUS SECONDARY BATTERIES, AND NONAQUEOUS SECONDARY BATTERY

Nº publicación: US20260112610A1 23/04/2026

Solicitante:

MITSUBISHI CHEMICAL CORP [JP]

Resumen de: US20260112610A1

Provided are: a negative electrode material for nonaqueous secondary batteries, which can yield a high-capacity nonaqueous secondary battery having excellent discharge rate characteristics; and a negative electrode for nonaqueous secondary batteries and a nonaqueous secondary battery. Also provided is a nonaqueous secondary battery having excellent charge-discharge efficiency. The negative electrode material for nonaqueous secondary batteries includes carbonaceous particles (A) and silicon oxide particles (B), and satisfies the followings: a) the average particle size (50% cumulative particle size from the smaller particle side; d50) is 3 μm to 30 μm, and the 10% cumulative particle size from the smaller particle side (d10) is 0.1 μm to 10 μm; b) the ratio (R1=d90/d10) between the 90% cumulative particle size from the smaller particle side (d90) and the d10 is 3 to 20; and c) the ratio (R2=d50/d10) between the d50 and the d10 is 1.7 to 5.