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REGENERATIVE BRAKING CURRENT CONTROL IN POWER TOOL

Resumen de: US2025350214A1

A power tool is provided including: a tool housing; a motor disposed within the tool housing; a battery receptacle arranged to be coupled to a battery pack having a rated capacity; a power switch circuit disposed between the battery receptacle and the motor; and a controller that controls the power switch circuit to drive the motor. The controller is configured to: determine or receive a pack ID associated with the rated capacity of the battery pack; set a braking profile for electronically braking the motor based on the pack ID; and apply an electronic brake to the motor in accordance with the set braking profile upon detection of an event associated with stoppage of the motor.

SELF-SUPPORTING ELECTROCHEMICAL DEVICE MIXTURE FILM, ELECTRODE, AND ELECTROCHEMICAL DEVICE

Resumen de: US2025349857A1

A self-supporting electrochemical device mixture film exhibiting excellent strength and flexibility without a support. A self-supporting electrochemical device mixture film containing: at least one of an electrode active material or a solid electrolyte; and a binder, the binder containing a TFE-based polymer composition, the TFE-based polymer composition containing a TFE-based polymer and at least one compound selected from the group consisting of a compound of formula (1) and a compound represented of formula (2):wherein m is 4 to 20; M1 is H, a metal atom, NR54 (where R5s are optionally the same or different from each other and each represent H or a C1-C10 organic group), or the like; and p is 1 or 2, andwherein n is 4 to 20; M2 is H, a metal atom, NR54 (where R5 is defined above), or the like; and q is 1 or 2.

BATTERY CATHODES CONTAINING MXENES PROCESSED FROM WATER-BASED SLURRIES

Resumen de: US2025349853A1

A method, comprising: combining at least a MXene, a solvent, and an electrochemically active material to form a slurry, the solvent consisting essentially of water, alcohol, or a combination of alcohol and water. An electrode, comprising: a structure comprising a MXene and an electrochemically active material, the structure optionally having a cross-sectional dimension of from about 1 to about 300 μm in thickness, preferably from about 10 to about 100 μm; and optionally a substrate on which the film is disposed. A device, the device comprising an electrode according to the present disclosure (for example, according to any one of Aspects 14-19). A method, comprising operating a device according to the present disclosure (for example, according to any one of Aspects 21-22).

HIGH-PERFORMANCE SODIUM BATTERIES AT ULTRALOW TEMPERATURES

Resumen de: WO2025234942A1

The present disclosure relates to a sodium-metal cell comprising (a) an anode; (b) an electrolyte comprising a base electrolyte containing diglyme and sodium hexafluorophosphate, dioxolane, and tris(trimethylsilyl)borate; and (c) a cathode comprising sodium or Na2/3Cu1/12Ni1/4Mn2/3O2, having a high mass loading of at least 15 mg cm-2, wherein the sodium-metal cell enables stable cycling at a temperature of -40 °C or lower.

IMPURITY MANAGEMENT PROCESS FOR LITHIUM-ION BATTERY RECYCLING

Resumen de: WO2025235821A1

Methods are provided for removing impurities from recycled battery black mass. The method includes mixing a delithiated black mass with a first solution to form a pre-leached delithiated black mass and a pre-leach solution, separating the pre-leached delithiated black mass from the pre-leach solution, mixing the separated pre-leached delithiated black mass and a second aqueous solution to form a mixture comprising graphite and a leachate solution, and separating the graphite and the leachate solution. The pre-leach solution is comprised of a first group of impurity ions while the leachate solution is comprised of a second group of impurity ions and cathode metal ions.

LITHIUM IRON PHOSPHATE MATERIAL AND METHODS OF FORMING AND USING SAME

Resumen de: WO2025235958A1

Methods of forming lithium iron phosphate cathode material and cathodes and electrochemical cells formed using the methods and/or including the cathode material are disclosed. Exemplary methods include forming iron nanotubes and/or solid state processing.

NON-AQUEOUS ELECTROLYTE, LITHIUM-ION BATTERY AND ELECTRONIC DEVICE

Resumen de: WO2025232335A1

A non-aqueous electrolyte, a lithium-ion battery and an electronic device. The non-aqueous electrolyte comprises a non-aqueous solvent and a lithium salt. The non-aqueous electrolyte comprises specific amounts of 1,2-bis(difluorophosphoroxy)ethane, ethylene carbonate, propylene carbonate and a boron-containing lithium salt, wherein the total content of 1,2-bis(difluorophosphoroxy)ethane and ethylene carbonate in the non-aqueous electrolyte is set to be within a specific range, and the total content of propylene carbonate and the boron-containing lithium salt in the non-aqueous electrolyte is also set to be within a specific range. By using the non-aqueous electrolyte, not only can the expansion of a negative electrode of the lithium-ion battery be improved, but the IV resistance can also be inhibited, and the high-temperature cycling performance of the lithium-ion battery is substantially improved.

ELECTRODE SHEET AND MANUFACTURING METHOD THEREFOR, SECONDARY BATTERY AND ELECTRICAL APPARATUS

Resumen de: WO2025232355A1

Disclosed in the present application are an electrode sheet and a manufacturing method therefor, a secondary battery and an electrical apparatus. The electrode sheet comprises a current collector, an active material layer, a conductive member and an insulating layer; the current collector comprises a first part and a second part which are adjacently arranged in a first direction; the active material layer is arranged on the first part, and comprises a first covering part and a second covering part which are successively arranged in the first direction, in the thickness direction of the current collector, the thickness of the second covering part being less than that of the first covering part; the conductive member is connected to the second part; the insulating layer is arranged on the second part, the surface of at least part of the conductive member away from the current collector, and the surface of at least part of the second covering part away from the current collector. Compared with existing electrode sheets, the electrode sheet using the described structure can reduce the risk of increased thickness at the edge of the active substance layer caused by the coating of the insulating layer on the active substance layer during the manufacturing process, thus helping to improve the energy density of secondary batteries.

BATTERY CELL, BATTERY PACK, AND VEHICLE

Resumen de: WO2025232136A1

The present application relates to the technical field of vehicles, and discloses a battery cell, comprising at least one structural unit. The height direction of the structural unit is a vertical direction, and if a plurality of structural units are provided, the plurality of structural units are stacked in the vertical direction. The length L1 of the battery cell satisfies 400 mm≤L1≤2200 mm; the width L2 of the battery cell satisfies 400 mm≤L2≤2200 mm; the ratio of the length L1 to the width L2 of the battery cell satisfies 1≤L1/L2≤2; the height direction of the battery cell is the vertical direction, and the height L3 satisfies 10 mm≤L3≤80 mm; and the ratio of the width L2 to the height L3 of the battery cell satisfies L2/L3≥8.

COMPOSITE NEGATIVE ELECTRODE SHEET, PREPARATION METHOD THEREFOR, AND LITHIUM ION BATTERY USING SAME

Resumen de: WO2025232315A1

A composite negative electrode sheet, a preparation method therefor, and a lithium ion battery using same. The composite negative electrode sheet comprises a current collector (1), an active coating (2) and an insulating coating (3) which are sequentially arranged. The insulating coating (3) comprises a polymer, an inorganic filler and a fast ion conductor. The active coating (2) comprises a binder and an active material. The difference between the solubility parameters of the polymer and the binder is denoted as |△δ|, where |△δ|>0.5(J/cm3)1/2. The barrier property between the insulating coating (3) and the active coating (2) is effectively improved, thus improving the structural stability of the composite negative electrode sheet.

METHOD AND SYSTEM FOR PREDICTING BATTERY CAPACITY DEGRADATION FOR ELECTRIC VEHICLE

Resumen de: US2025346150A1

A method and a system for predicting a battery capacity degradation for an electric vehicle having a battery are provided. The method comprises extracting and pre-processing a raw dataset comprising a plurality of battery loss indicators and a plurality of battery loss values each corresponding to a plurality of time steps to obtain a pre-processed dataset. The method further comprises selecting a loss indicator subset from the pre-processed dataset at a first time step and a second time step based on a smart feature selection (SFS) algorithm. The method further comprises training a machine learning model with each battery loss indicator at the first and second time steps and the battery loss value at the first time step. The method further comprises determining the battery loss value at the second time step with the machine learning model to predict the battery capacity degradation.

ELECTROCHEMICAL DEVICE SEPARATOR, METHOD FOR MANUFACTURING SAME, AND ELECTROCHEMICAL DEVICE COMPRISING SAME

Resumen de: US2025349971A1

Disclosed is a separator for an electrochemical device. The separator includes a porous polymer substrate, a porous coating layer formed on at least one surface of the porous polymer substrate and including a polymer binder and inorganic particles, and a dopamine coating layer formed on the porous coating layer and including polydopamine and dextrin. The separator has reduced thermal shrinkage even in a high temperature wet state.

BATTERY CELL, BATTERY AND ELECTRIC DEVICE

Resumen de: US2025349969A1

A battery cell, a battery, and an electric device are disclosed. The battery cell includes a housing with an inner cavity, an electrode assembly positioned within the cavity, and an exhaust structure located between the electrode assembly and a first wall of the housing. The exhaust structure includes a fluid channel configured to guide airflow. By positioning the exhaust structure within the inner cavity and between the electrode assembly and the housing wall, the airflow can pass through the fluid channel with reduced obstruction. This design allows airflow to reach a designated area more efficiently, thereby enhancing the reliability of the battery cell.

HOUSING ASSEMBLY, BATTERY PACK, AND ENERGY STORAGE POWER SUPPLY

Resumen de: US2025349968A1

Provided are a housing assembly, a battery pack, and an energy storage power supply. The housing assembly includes a housing having a receiving chamber. The receiving chamber is provided with a first support at an inner wall of the receiving chamber. The first support is configured for mounting a battery cell provided with a first explosion-proof valve. The first support is provided with a supporting structure configured to support the battery cell and allow a spacing to be formed between the first explosion-proof valve and the inner wall of the receiving chamber to form a pressure relief space. The pressure relief space is in communication with the receiving chamber. A valve port of the first explosion-proof valve is oriented towards the pressure relief space.

SEPARATOR, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE

Resumen de: US2025349981A1

A separator, a battery cell, a battery, and an electric device. The separator comprises a liquid retention polymer, and the separator satisfies the following formula: (m2−M)/(m1−M)≥25%, wherein M represents the mass of the electrolyte not absorbed by the separator, and the unit thereof is g; m1 represents the mass of the separator weighed under an ambient pressure after having been immersed in the electrolyte for 2 h, and the unit thereof is g; and m2 represents the mass of the separator weighed under a pressure of 10,000 N in the ambient pressure after having been immersed in the electrolyte for 2 h, and the unit thereof is g.

ELECTROCHEMICAL CELL WITH TMCCC ELECTRODES IN AN ACETONITRILE SOLVENT INCLUDING A DINITRILE ADDITIVE

Resumen de: US2025349895A1

A system and method for a liquid electrolyte used in secondary electrochemical cells having at least one electrode including a TMCCC material, the liquid electrolyte enabling an increased lifetime while allowing for fast discharge to extremely high depth of discharge. The addition of dinitriles to liquid electrolytes in electrochemical cells in which energy storage is achieved by ion intercalation in transition metal cyanide coordination compounds (TMCCC) has the advantage of increasing device lifetime by inhibiting common chemical and electrochemical degradation mechanisms.

ELECTROLYTES INCLUDING PHOSPHATE TRIESTER SOLVENTS FOR BATTERIES THAT CYCLE LITHIUM IONS AND BATTERIES INCLUDING THE SAME

Resumen de: US2025349900A1

An electrolyte for a battery that cycles lithium ions includes an organic solvent and a lithium salt in the organic solvent. The organic solvent includes a primary solvent component and a secondary solvent component. The primary solvent component includes a phosphate triester having the formula R1O—P(═O)(OR2)(OR3), wherein R1, R2, and R3 are each individually a fluorinated or nonfluorinated organic group selected from the group consisting of hydrocarbyl, heterohydrocarbyl, silyl, siloxy, alkoxysilyl, cyano, and alkylcyano. The lithium salt includes lithium nitrate (LiNO3). The lithium nitrate is present in the organic solvent at a concentration of greater than or equal to 0.5 moles per liter and less than or equal to 4 moles per liter. The electrolyte is configured to provide a medium for the conduction of lithium ions between a negative electrode including a lithium-based electroactive negative electrode material and a positive electrode including an olivine-type lithium transition metal oxide.

BINDER COMPRISING COPOLYMER, ANODE FOR SECONDARY BATTERY COMPRISING SAME BINDER, SECONDARY BATTERY COMPRISING SAME ANODE, AND METHOD FOR POLYMERIZING SAME COPOLYMER

Resumen de: US2025349855A1

The present invention relates to a poly(vinyl alcohol-co-acrylic acid-co-cyanoethylated vinyl alcohol) (PVA-PAA-CEPVA) copolymer and a method for preparing same, and an anode slurry, an anode, and a secondary battery comprising the copolymer.

CONTROL METHOD FOR ELECTRIC VEHICLE AND CONTROL SYSTEM FOR ELECTRIC VEHICLE

Resumen de: WO2025234060A1

Provided is a control method for an electric vehicle that includes a motor, an inverter that sends and receives power to/from the motor, and a battery that is warmed up by exhaust heat from the motor and/or the inverter. The control method involves calculating a first current command value on the basis of a torque command value, calculating a voltage command value for operating the inverter on the basis of a value obtained by multiplying the difference between the first current command value and a current detection value for the motor by a prescribed gain, and, when it has been determined to be necessary to warm up any warm-up target from among the motor, the inverter, and the battery, calculating a second current command value for causing the motor and the inverter to produce heat and transitioning the current command value for calculating the voltage command value from the first current command value to the second current command value. The gain at the time that the current command value is transitioned from the first current command value to the second current command value is set to a second gain that is greater than a first gain that is the gain immediately before the current command value is transitioned from the first current command value to the second current command value.

RESIN FILM FOR POWER STORAGE DEVICE AND POWER STORAGE DEVICE

Resumen de: WO2025234420A1

Provided is a resin film for a power storage device, said film being capable of suitably absorbing gas inside of the power storage device, and capable of suppressing the occurrence of wrinkles, dents, and the like in an outer casing when vacuum-sealing a power storage device element.　This resin film for a power storage device is disposed between an outer casing of a power storage device and a power storage device element. The resin film for a power storage device comprises a gas absorbing agent and a porous resin layer.

COOLING STRUCTURE FOR VEHICLE-MOUNTED BATTERY

Resumen de: WO2025234049A1

Provided is a cooling structure for a vehicle-mounted battery, whereby a battery pack can be efficiently cooled with a simple configuration, a rise in temperature of the battery pack can be prevented, and battery performance can be maintained, and in addition, a variation in temperature among a plurality of battery packs can be suppressed, and output restrictions and accelerated battery degradation can be avoided.　The cooling structure for the vehicle-mounted battery is for cooling a battery mounted under the floor of a vehicle. The battery has a plurality of battery packs arranged along the front-rear direction of the vehicle. A first air flow passage through which cooling air (traveling wind) introduced from the front of the vehicle flows is formed above the plurality of battery packs. A second air flow passage through which the traveling wind introduced from the front of the vehicle flows is formed at the lower side of the plurality of battery packs, and a cooling air flow passage through which the cooling air introduced from the first air flow passage flows is formed in each arrangement gap between the plurality of battery packs. A negative pressure suctioning part that draws air into the cooling air flow passages by a negative pressure suctioning action generated by the flow velocity of the traveling wind is formed in the second air flow passage.

PREPARATION METHOD FOR CARBON NANOTUBE-SODIOPHILIC METAL ANODE-FREE SODIUM METAL BATTERY ELECTRODE MATERIAL AND USE THEREOF

Resumen de: WO2025231782A1

A preparation method for a carbon nanotube-sodiophilic metal anode-free sodium metal battery electrode material. The preparation method comprises the following steps: modifying the carbon nanotubes by using a dielectric barrier plasma device; mixing and stirring the modified carbon nanotubes with a sodiophilic metal salt to obtain a precursor slurry; and drying the precursor slurry, placing the precursor slurry into a tubular furnace after the drying, and heating same for reaction by introducing a reducing gas to obtain a carbon nanotube-sodiophilic metal anode-free sodium metal battery electrode material. The prepared electrode material has a stable structure, excellent conductivity, and excellent sodiophilicity, and can be applied to anode-free sodium metal battery electrode materials. The entire preparation process is controllable, with a short synthesis cycle and simple operation.

SECONDARY BATTERY, MANUFACTURING METHOD FOR ELECTRODE ASSEMBLY, AND ELECTRONIC DEVICE

Resumen de: WO2025231629A1

Disclosed in the present application are a secondary battery, a manufacturing method for an electrode assembly, and an electronic device. The secondary battery comprises an electrode assembly and a first tab, wherein the electrode assembly comprises a first electrode sheet, a second electrode sheet, and a separator arranged between the first electrode sheet and the second electrode sheet. The first tab is connected to the outermost ring of the first electrode sheet, and the relative position between the first tab and the electrode assembly is fixed. In the winding direction of the electrode assembly, the electrode sheet at the outermost ring of the electrode assembly is the first electrode sheet, and the outermost ring of the first electrode sheet is partially laminated in a first direction to form a first laminated portion, the first direction being the lamination direction of the second electrode sheet and the separator that are adjacent to the first laminated portion; and in the winding direction of the electrode assembly, the shortest distance between a first junction position and a second junction position on the first electrode sheet is P, a first portion is formed therefrom, and P satisfies 0 mm≤P≤6 mm; and the first laminated portion is disposed between the first tab and the first portion.

SECONDARY BATTERY, MANUFACTURING METHOD FOR ELECTRODE ASSEMBLY, AND ELECTRONIC DEVICE

Resumen de: WO2025231627A1

The present application relates to a secondary battery, a manufacturing method for an electrode assembly, and an electronic device. The secondary battery comprises an electrode assembly, the electrode assembly comprising a first electrode sheet, a second electrode sheet and a separator, wherein the separator is arranged between the first electrode sheet and the second electrode sheet, and the first electrode sheet, the second electrode sheet and the separator are stacked and wound to form a wound structure; the first electrode sheet comprises a first current collector and a first active material layer, the first active material layer being disposed on at least one surface of the first current collector; the first current collector comprises a first surface and a second surface, which are arranged opposite each other in the direction of the thickness of the first current collector; and in the winding direction of the electrode assembly, the first current collector comprises a first empty foil region on the first surface that is not provided with a first active material layer, a first coated region on the first surface that is provided with a first active material layer, and a second coated region on the first surface that is provided with a first active material layer, the first empty foil region being located between the first coated region and the second coated region.

POSITIVE ELECTRODE ACTIVE MATERIAL AND PREPARATION METHOD THEREFOR, POSITIVE ELECTRODE PLATE, SECONDARY BATTERY, AND POWER CONSUMING APPARATUS

Nº publicación: US2025349850A1 13/11/2025

Solicitante:

CONTEMPORARY AMPEREX TECH HONG KONG LIMITED [CN]
CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED

Resumen de: US2025349850A1

A positive electrode active material and a preparation method therefor, as well as a positive electrode plate, a secondary battery, and a power-consuming apparatus, are disclosed. The positive electrode active material is a polyanionic compound/carbon composite and has the general formula: Na4-xR3-γM(PO4)2P2O7/C, where R includes at least one of Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Sn, Hf, Ta, W, and Pb; M includes at least one of Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Sn, Hf, Ta, Si, W, and Pb; 0≤x≤0.5, 0≤y≤0.5, 0≤z