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Non-Aqueous Electrolyte and Lithium Secondary Battery Including the Same

Resumen de: US20260331581A1

0000 Provided is a non-aqueous electrolyte including a lithium salt, an organic solvent, and an additive, wherein the additive includes a compound represented by Formula 1, and is excellent in electrode film protection and an O<2 >scavenging effect, so that cycle properties and resistance properties of a lithium secondary battery including the non-aqueous electrolyte may be simultaneously improved, 0000 wherein all the variables are described herein.

NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Resumen de: US20260331593A1

0000 In the present invention, a negative electrode has a non-facing part on the side of the electrode body on the inner end side in the winding direction. The non-facing part has a composite material non-facing part, in which the negative electrode composition layer is formed on at least one surface of the negative electrode core. In the composite material non-facing part, the winding-direction length of a negative electrode composite layer formed on an inner circumference surface of the negative electrode core is 0.3 turns or more along the winding direction of the composite material non-facing part, and the winding-direction length of a negative electrode composite layer formed on an outer circumference surface of the negative electrode core does not exceed ⅔ of the winding-direction length of the negative electrode composite layer formed on the inner circumference surface of the negative electrode core.

Battery Assembly of Battery Modules

Resumen de: US20260331713A1

0000 A battery assembly (10) comprising a chain of at least a primary battery module (20) and a secondary battery module (22) is described. The primary battery module comprises a primary casing (40′) within which a first plurality of groups of battery cells (32) are housed and electrically connected in series, each group comprising a plurality of battery cells (30) electrically connected in parallel. The primary battery module further comprises a cell monitoring unit (60) arranged to detect a voltage of each of the plurality of groups of battery cells of the primary battery module. The secondary battery module comprises a secondary casing (40″) within which a second plurality of groups of battery cells (32) are housed and electrically connected in series, each group comprising a plurality of battery cells (30) electrically connected in parallel. Also provided is an electrical interconnect between the primary battery module and the secondary battery module, arranged such that each of the first plurality of groups of battery cells is electrically connected in parallel with a corresponding one of the second plurality of groups of battery cells, so that the voltages detected by the cell monitoring unit are also voltages of each of the plurality of groups of battery cells of the secondary battery module.

BINDER FOR ELECTRODE COMPRISING POLY(VINYLIDENE FLUORIDE) AND A HYDROPHILIC POLYMER

Resumen de: US20260331510A1

The present invention relates to a binder composition for positive electrodes comprising a polymer P1 comprising recurring units derived from vinylidene fluoride and a hydrophilic polymer P2 comprising recurring units derived from at least one monomer of formula R1R2C═C(R3)C(O)R (I) wherein R1, R2 and R3 are independently selected from the group consisting of H and C1-C5 alkyl; R is selected from the group consisting of —NHC(CH3)2CH2C(O)CH3, —NR′R″ or —OR′ wherein R′ and R″ are independently selected from the group consisting of H and C1-C18 alkyl groups optionally substituted by one or more hydroxyl, thiol or amino functional group(s) or a five- to six-membered heterocycle comprising at least one nitrogen atom in the ring; characterized in that the weight average molecular weight of said hydrophilic polymer P2 is greater than 30000 g/mol, advantageously greater than 50000 g/mol, preferably greater than 65000 g/mol, more preferably greater than 80000 g/mol.

CHARGING CASES FOR EARPHONES

Resumen de: US20260331935A1

0000 The present disclosure provides a charging case for an earphone, comprising a lower housing assembly, an upper housing assembly, a main control circuit board, a magnetic suction structure, and an upper housing magnet. A Hall sensor is provided within the lower housing assembly, and the Hall sensor is electrically connected to the main control circuit board. The magnetic suction structure is configured to place an earphone in a magnetic suction manner, and when the upper housing assembly is in an open state with respect to the lower housing assembly, the Hall sensor is in a first state under an action of a magnetic field of the magnetic suction structure, and when the upper housing assembly is in a closed state with respect to the lower housing assembly, the upper housing magnet causes the Hall sensor to switch to a second state different from the first state.

NEGATIVE ELECTRODE ACTIVE MATERIAL, SECONDARY BATTERY, AND ELECTRONIC APPARATUS

Resumen de: US20260331496A1

0000 A pressurized compacted density of a powder of the negative electrode active material is a g/cm<3>, a pressure-released compacted density of the powder the negative electrode material is b g/cm<3>, and a pressure-release rebound rate is c, where c=(a−b)/a×100%, and 1.5%≤c≤20%; and a and c satisfy: c=k×(a−1), where 0.08≤k≤0.20. By regulating the value of k within the above range and ensuring a and c satisfy the above relationship, the negative electrode active material can maintain high porosity under a high compacted density, facilitating the infiltration of an electrolyte into the negative electrode sheet, enhancing the diffusion rate of active ions, and improving the kinetic performance of the secondary battery.

Current Collector, Application of Current Collector, Secondary Battery, Battery Module, Battery Pack, and Electrical Device

Resumen de: US20260331521A1

This application provides a current collector, an application of the current collector, a secondary battery, a battery module, a battery pack, and an electrical device. An undercoat is formed on a surface of the current collector. The undercoat includes a carbon nanomaterial. The carbon nanomaterial includes at least two selected from a zero-dimensional carbon material, a one-dimensional carbon material, or a two-dimensional carbon material. The undercoat is conducive to reducing a nucleation overpotential in metal ion deposition, and can effectively induce uniform deposition of metal ions, regulate the metal ion deposition, effectively suppress dendrite growth of the metal ions, and improve cycle performance and safety of the battery.

BINDER COMPOSITION FOR ALL-SOLID-STATE SECONDARY BATTERY, SLURRY COMPOSITION FOR ALL-SOLID-STATE SECONDARY BATTERY, SOLID ELECTROLYTE-CONTAINING LAYER, AND ALL-SOLID-STATE SECONDARY BATTERY

Resumen de: US20260331506A1

0000 The binder composition for an all-solid-state secondary battery in which a sulfide inorganic solid electrolyte is used contains a polymer including a (meth)acrylic acid alkyl ester monomer unit and an acetic acid ester solvent in which a hydrocarbon group having a carbon number of 6 to 9 is bonded to a non-carbonyl oxygen atom. The (meth)acrylic acid alkyl ester monomer unit includes a first (meth)acrylic acid alkyl ester monomer unit in which an alkyl group having a carbon number of 3 to 8 is bonded to a non-carbonyl oxygen atom and a second (meth)acrylic acid alkyl ester monomer unit in which an alkyl group having a carbon number of 1 to 2 is bonded to a non-carbonyl oxygen atom. A mass ratio of the first (meth)acrylic acid alkyl ester monomer unit relative to the second (meth)acrylic acid alkyl ester monomer unit is 2.1 to 2.5.

LITHIUM SECONDARY BATTERY

Resumen de: US20260331473A1

A lithium secondary battery is provided, having a silicon-based negative electrode, a positive electrode, a separator; and an electrolyte, wherein the positive electrode or silicon-based negative electrode is a pre-lithiated electrode, and wherein the silicon-based negative electrode has a certain silicon discharge capacity use range, and certain upper and lower ends of the silicon discharge capacity.

BATTERY PACK WITH IMPROVED SAFETY

Resumen de: US20260331697A1

0000 A battery pack includes: a cell module assembly including a battery cell stack in which a plurality of battery cells are stacked; a pack case configured to house the cell module assembly, and including a venting port on at least one surface of the pack case; and an outer cover that covers an outer surface of the pack case and is arranged apart from the outer surface of the pack case by a prescribed distance. A space between the pack case and the outer cover forms a venting flow path through which a venting gas, generated during a thermal event of the plurality of battery cells, is able to move. The venting gas is discharged to an outside of the battery pack through an opened space formed on at least one end part of the outer cover.

ELECTRODE ASSEMBLY, SECONDARY BATTERY, AND ELECTRONIC DEVICE

Resumen de: US20260331722A1

An electrode assembly, a secondary battery, and an electronic device. One end of a first current collector in a width direction is provided with a plurality of extension members, a first surface of each extension member is provided with a plurality of protruding portions in a protruding manner, and a second surface of the extension member is provided with a plurality of recessed portions in a recessed manner. The electrode assembly includes adjacent extension members. When viewed along a thickness direction of the electrode assembly, two adjacent extension members at least partially overlap, and at least one protruding portion of one extension member is embedded in a recessed portion of another extension member adjacent thereto.

CYLINDRICAL BATTERY

Resumen de: US20260331523A1

0000 A positive electrode includes, between the winding start side end of a positive electrode mixture layer and the winding end side end of the positive electrode mixture layer in an o-direction, a first positive electrode core exposed portion positioned at one edge in a β-direction and to which a positive electrode lead is connected, and a second positive electrode core exposed portion positioned at the other edge in the β-direction and a part of which is opposite the first positive electrode core exposed portion in the β-direction with a part of the positive electrode mixture layer therebetween. The part of the positive electrode mixture layer is disposed between the first and second positive electrode core exposed portions in the β-direction. The width-direction length a between the first and second positive electrode core exposed portions is not less than 10% of the β-direction length b of the positive electrode.

BATTERY PACK WITH IMPROVED FIRE PROTECTION PERFORMANCE

Resumen de: US20260331739A1

0000 A battery pack including a cell module assembly including a battery cell stack in which a plurality of battery cells are stacked; a pack case including an internal space, and housing the cell module assembly in the internal space; and a fire extinguishing unit configured to extinguish a thermal event in the plurality of battery cells by supplying a fire extinguishing agent into the pack case when the thermal event occurs in the plurality of battery cells, wherein the pack case includes at least one drain port on at least one of a longitudinal edge and a widthwise edge of a bottom surface of the pack case.

BATTERY PACK AND VEHICLE HAVING SAME

Resumen de: US20260331642A1

0000 Provided are a battery pack and a vehicle having same. The battery pack includes a frame, a partition assembly, a liquid cooling plate, and a bottom protection plate. The frame is configured to enclose a receiving cavity. The partition assembly is disposed in the frame to divide the receiving cavity into a plurality of receiving sub-cavities. The liquid cooling plate is located at a bottom of the frame, and has a bottom access opening directly facing one of the plurality of receiving sub-cavities. The liquid cooling plate is fixedly connected to the frame and at least part of the partition assembly adjacent to the bottom access opening. The bottom protection plate is detachably connected below the liquid cooling plate, and configured to open and close the bottom access opening.

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Resumen de: US20260331517A1

0000 With respect to a nonaqueous electrolyte secondary battery according to the present disclosure, the positive electrode contains a lithium-containing composite oxide and a sulfonic acid compound that is present on the particle surfaces of the lithium-containing composite oxide; the sulfonic acid compound is represented by formula (I); the negative electrode comprises a negative electrode core body, a first negative electrode mixture layer that is arranged on the surface of the core body, and a second negative electrode mixture layer that is arranged on the surface of the first negative electrode mixture layer; the thickness T1 of the first negative electrode mixture layer and the thickness T2 of the second negative electrode mixture layer satisfy the relational expression 0.1≤T1/(T1+T2)≤0.9; the first negative electrode mixture layer and the second negative electrode mixture layer each contain a negative electrode active material and a binder; the binder content CI in the first negative electrode mixture layer and the binder content C2 in the second negative electrode mixture layer satisfy the relational expression C1>C2. (In the formula, A represents a group 1 element or a group 2 element, R represents a hydrocarbon group; and n is 1 or 2.) 0000

Pouch-Type Battery Case and Method for Manufacturing the Same, and Method for Manufacturing Secondary Battery

Resumen de: US20260331647A1

A pouch-type battery case including a cup part having a recessed shape; and a gas pocket part disposed at one side of the cup part and having a recessed shape is provided. A wrinkle part folds or unfolds so that a depth of the gas pocket part varies depending on an internal pressure of the gas pocket part may be defined on a circumferential portion of the gas pocket part. The wrinkle part may include: a convex portion protruding to the outside of the gas pocket part; and a concave portion which is alternately disposed with the convex portion in a depth direction of the gas pocket part. A remaining thickness of the convex portion may be less than a remaining thickness of the concave portion.

Temperature-Based Battery-Charging-Profile Architectures and Applications Thereof

Resumen de: US20260331942A1

0000 The present document describes techniques associated with temperature-based battery-charging-profile architectures and applications thereof. Although advances in battery chemistries may enable batteries to be charged at temperatures that are higher or lower than the limits of conventional-battery chemistries (e.g., 0 °C to 60 °C), conventional hardware is generally restricted (e.g., hardcoded) to those limits. However, the temperature-based battery-charging-profile architectures and applications thereof, as described herein, provide a low-cost solution for conventional battery-charging hardware to be able to charge batteries with battery chemistries having expanded charging limits. The techniques described herein enable charging of batteries at temperatures that are outside of the standard JEITA mask by utilizing a switching mechanism operated by a controller that switches, based on the battery temperature, to a different charge profile with a reduced charge rate at a reduced voltage and/or current without affecting the JEITA mask.

NEGATIVE ELECTRODE ACTIVE MATERIAL, BATTERY, AND ELECTRIC DEVICE

Resumen de: US20260331502A1

A particle size Dv50 of the negative electrode active material is a μm, a specific surface area is b m2/g, and 20≤2.5×a+b≤40. The battery includes a positive electrode plate, a negative electrode plate, and an electrolyte, where the negative electrode plate includes a negative electrode current collector and a negative electrode active material layer disposed on at least one surface of the negative electrode current collector, the negative electrode active material layer including the above negative electrode active material. The negative electrode active material, the battery, and the electric device can improve the low-temperature discharge capability of the battery and increase the low-temperature discharge capacity retention rate thereof.

FABRICATION OF POROUS ELECTRODES BY FUSION OF SILVER PARTICLES

Resumen de: US20260331455A1

0000 A method of making an electrode by providing a mixture of first particles of silver or silver oxide and second particles of an inorganic porogen, molding the mixture, cohering the mixture to form a green body, demolding the green body, heating the green body to form a monolith, to convert any silver oxide to silver, and to fuse the first particles together, and submerging the monolith in a liquid that removes the second particles.

LID CLOSURE FOR A SECONDARY CELL

Resumen de: US20260331657A1

There is disclosed herein a cylindrical secondary cell and a method of manufacturing thereof. The cell comprises a cylindrical casing (102) extending along an axis (A) from a first end (102a) to a second end (102b), the first end (102a) being an open end of the casing (102), an electrode roll (104) housed within the casing (102), and a lid (106) closing the open end (102a) of the casing (102). Advantageously, the edge of the open end (102a) is bent inwards to provide a flange (102d) comprising an angled surface (102e) sloping towards the second end (102b) of the casing (102), and the lid (106) is configured to be attached to the flange (102d).

Battery Cell, and Battery Module, Battery Pack and Vehicle Including the Same

Resumen de: US20260331658A1

Disclosed is a battery cell, which includes an electrode assembly including a cell body and an electrode tab provided to at least one side of the cell body, a cell case configured to accommodate the electrode assembly therein, an electrode lead coupled to the electrode tab and extending from the cell case, and a tab protection module accommodated in the cell case and configured to cover at least a portion of the electrode tab, the tab protection module including a lead positioning guide and a corresponding positioning guide insert portion adapted to receive the positioning guide insert portion, wherein the positioning guide insert portion is configured to couple to the electrode lead to guide a position of the electrode lead relative to the cell case.

CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, MANUFACTURING METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Resumen de: US20260331487A1

0000 The present invention relates to a positive electrode active material for a lithium rechargeable battery, which is a lithium transition metal oxide containing nickel (Ni) and manganese (Mn), wherein the lithium transition metal oxide may be a single particle and has a crystal defect rate of less than 3%.

BATTERY PACK AND VEHICLE INCLUDING THE SAME

Resumen de: US20260331698A1

A battery pack and a vehicle including the same are provided. The battery pack is configured to improve energy density and ensure structural stability even when a thermal event occurs. The battery pack includes a cell assembly, a cell case accommodating the cell assembly, the cell case including an open portion at least at one side thereof, and a pack housing to which the cell case is coupled, the pack housing including a venting path facing the open portion.

POSITIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Resumen de: US20260331458A1

0000 A positive electrode contains, as a positive-electrode active material, a lithium transition metal composite oxide that has a layered structure and contains at least 75 mol % of Ni with respect to the total molar quantity of metal elements excluding Li. The lithium transition metal composite oxide is made of secondary particles formed by aggregation of primary particles. At least one selected from the group consisting of Ca and Sr, and at least one selected from the group consisting of W, Mo, Ti, Si, Nb, and Zr, are present at the interface between primary particles inside the secondary particles. An electroconductive auxiliary agent within a positive-electrode compound layer includes at least one selected from the group consisting of particulate carbon materials having an average grain diameter of 20 nm or less and fibrous carbon materials having an average fiber diameter of 20 nm or less, the carbon materials containing carbon.

NEGATIVE ELECTRODE FOR SECONDARY BATTERIES, SECONDARY BATTERY, AND METHOD FOR PRODUCING NEGATIVE ELECTRODE FOR SECONDARY BATTERIES

Nº publicación: US20260331464A1 22/10/2026

Solicitante:

PANASONIC INTELLECTUAL PROPERTY MAN CO LTD [JP]
Panasonic Intellectual Property Management Co., Ltd.

Resumen de: US20260331464A1

0000 A negative electrode for secondary batteries according to one embodiment of the present disclosure is characterized by comprising a negative electrode current collector and a negative electrode mixture layer that is arranged on the negative electrode current collector, and is also characterized in that: the negative electrode mixture layer contains a binder and a negative electrode active material that contains a carbon material and an Si-based material; the pore size distribution of the negative electrode mixture layer as determined by a mercury intrusion method has two peak values R1 and R2; the peak value RI is within the range of 0.5 μm to 1.5 μm; the peak value R2 is within the range of 2 μm to 10 μm; and the content of the binder contained in the negative electrode mixture layer is 4% by mass or more with respect to the total mass of the negative electrode active material.