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1263
results.
Updated on
26/12/2025 [07:11:00]
Results 975 to 1000 of 1263
Absstract of: US2025379231A1
A negative electrode active material includes a carbon-based material, where particle surface of the carbon-based material includes an alkali metal element, and the alkali metal element includes element sodium and/or element potassium. The surface of carbon-based material such as a graphite material is treated to obtain an organic substance layer similar to an SEI film on the particle surface, which can effectively improve the quality of the SEI film, thereby improving the initial coulombic efficiency and cycling performance of the secondary battery.
Absstract of: US2025379232A1
A secondary battery and an electric apparatus including the secondary battery. The secondary battery includes a negative electrode plate. The negative electrode plate includes a negative electrode current collector and a negative electrode film layer disposed on at least one surface of the negative electrode current collector, where the negative electrode film layer includes an additive capable of undergoing a nucleophilic reaction with a cyclic carbonate compound.
Absstract of: US2025379233A1
The present invention relates to a binder composition for a sulfur cathode of a lithium-sulfur secondary battery, comprising at least one selected from a polar monomer, an ionic monomer, a polar polymer, and an ionic polymer, and comprising a counterion that forms a pair with an ion included in the ionic monomer and the ionic polymer; and to a sulfur cathode and a lithium-sulfur secondary battery comprising the same. Accordingly, the shuttle phenomenon of lithium polysulfide can be prevented, and the formation of a three-dimensional lithium sulfide structure on the surface of the sulfur cathode can be induced, thereby preventing the loss of active material and suppressing passivation of the sulfur cathode surface, ultimately enabling the realization of a high energy density lithium-sulfur secondary battery.
Absstract of: WO2025251427A1
An electrode sheet and a preparation method therefor, and a lithium-ion battery. The electrode sheet comprises a first electrode sheet, which comprises a first current collector and a first active material coating layer coated on one surface of the first current collector, wherein the first active material coating layer comprises a first active substance, a first binder and a first conductive agent. The mass content of the first conductive agent is D1, the mass content of the first binder is P1, and the total mass of the first active material coating layer is CW1; the electrode efficiency of the first electrode sheet is Q1; and Q1, CW1, D1 and P1 satisfy the relational expression: Q1=CW1*(1-D1-P1), and 1≤P1/D1≤8. By reducing the content of a conductive agent, the source of lithium ions is limited, thereby reducing the precipitation ability of lithium ions. Moreover, the content of a binder is increased so as to improve the bonding capability between an electrode sheet and a separator, which reduces lithium precipitation of the electrode sheet. In addition, the warping phenomenon of a single-sided sheet is reduced by controlling the mass of the active material coating.
Absstract of: WO2025251426A1
A roller-pressing pressure control method, apparatus and system. The method comprises: when an edge region of a cathode sheet is located at a roller-pressing position point, which is on an anode strip and is for an upper roller, reducing the roller-pressing pressure of the upper roller for the anode strip, such that the roller-pressing pressure of the upper roller for the anode strip is less than an initial pressure value; and when a non-edge region of the cathode sheet is located at the roller-pressing position point, which is on the anode strip and is for the upper roller, maintaining the roller-pressing pressure of the upper roller for the anode strip at the initial pressure value, wherein the non-edge region of the cathode sheet is the region of the cathode sheet other than the edge region.
Absstract of: WO2025251278A1
The present application relates to a battery cell, an electrode assembly, a battery and an electrical apparatus. The battery cell comprises a casing, an electrode assembly and an end cover assembly; the electrode assembly comprises a first electrode sheet and a second electrode sheet which have opposite polarities, and a separator; the first electrode sheet, the second electrode sheet and the separator are wound in a winding direction to form a winding structure, the winding structure comprising a straight region and a bent region; the first electrode sheet comprises a first current collector and a first active material layer which are connected to each other, the first current collector comprising a base portion and a thickened portion; the thickened portion is located within the bent region and extends toward the straight region for a predetermined length, and the base portion is located within the straight region and connected to the thickened portion, the thickened portion having a thickness greater than the thickness of the base portion and being arranged protruding from the base portion, and the first active material layer covering the base portion and the thickened portion. In the electrode assembly, the battery cell, the battery and the electrical apparatus provided in the present application, the electrode assembly can reduce the risk of short-circuit in the battery cell, thereby ensuring the overall reliability of the battery cell.
Absstract of: US2025379213A1
A positive electrode for a non-aqueous electrolyte secondary battery, including: a positive electrode current collector including a positive electrode current collector main body formed of a metal material; and a positive electrode active material layer provided on the positive electrode current collector, wherein: the positive electrode active material layer includes a positive electrode active material; the positive electrode active material has, on at least a part of its surface, an active material coating section including a conductive material; the positive electrode current collector main body has, on at least a part of its surface on a side of the positive electrode active material layer, a current collector coating layer including a conductive material; and a ratio of thickness of the current collector coating layer to thickness of the positive electrode active material layer is more than 0.000 and less than 0.020.
Absstract of: US2025379347A1
Disclosed are a battery pack case including a base plate forming one side of the battery pack case and having a through hole connecting an internal space of the battery pack case with outside of the battery pack case, and an outer plate spaced apart from an outer surface of the base plate and blocking the through hole from being exposed to the outside and forming a separation space between the base plate and the outer plate. Also disclosed are a battery pack including the same, and a vehicle.
Absstract of: US2025379343A1
A system may include a battery, a protection field-effect transistor electrically coupled to a first terminal of the battery, such that when the protection field-effect transistor is deactivated, substantially zero electrical current flows to and from the battery, and a battery management system electrically coupled to the protection field-effect transistor and configured to sense a first voltage across the protection field-effect transistor and control the protection field-effect transistor based on the first voltage.
Absstract of: US2025379344A1
A battery and an electrical apparatus. The battery includes a battery cell, a support component, a first plate, and a protective component; the battery cell includes a pressure relief mechanism, and the pressure relief mechanism is arranged on a first wall of the battery cell; the support component abuts against the first wall to support the battery cell, and the support component is arranged between the battery cell and the first plate. The support component and the first plate are arranged at an interval to form an accommodating space, and the accommodating space is used to accommodate an emission from the battery cell when the pressure relief mechanism is actuated; and the protective component is arranged between the support component and the first plate and arranged opposite to the pressure relief mechanism, and is used to withstand an impact force of the emission.
Absstract of: WO2025251600A1
Disclosed in the present application are an electrolyte and a battery, the electrolyte comprising a lithium salt, an organic solvent, a first additive and a second additive; the first additive is represented by formula I, and the second additive comprises at least one of 1,3-propane sultone, 1,3-propene sultone, ethylene sulfate, methylene methanedisulfonate and a compound represented by formula II; in formula I, R1, R2, R3, R4, R5, R6, R7 and R8 are each independently selected from any one of hydrogen, halogen, alkyl and haloalkyl. Introducing both the first additive and the second additive into the electrolyte can improve the cycle performance and the high and low temperature performance of lithium batteries, thereby prolonging the service life.
Absstract of: WO2025251524A1
The present application relates to the field of batteries, and provides a battery cell, a battery and an electrical device. The battery cell comprises a casing, an electrode assembly and a protective member, the electrode assembly being accommodated in the casing, the electrode assembly comprising a positive electrode sheet, a negative electrode sheet and a separator, and the positive electrode sheet, the separator and the negative electrode sheet being wound or stacked to form the electrode assembly. The protective member covers at least part of the outer surface of the casing, and the protective member comprises a thermal insulation layer, the thermal insulation layer being used for suppressing the heat of the electrode assembly from transferring to the side of the protective member facing away from the casing, and the thermal conductivity of the thermal insulation layer being less than or equal to 0.5. The battery cell is provided with the protective member, and the protective member covers at least part of the outer surface of the casing. The protective member has the thermal insulation layer, such that when thermal runaway occurs in one battery cell, the protective member can prevent heat from being transferred to another battery cell adjacent to the battery cell to a certain extent, thereby reducing the risk of thermal runaway occurring in another battery cell adjacent to the battery cell, and helping to improve the battery reliability.
Absstract of: WO2025251576A1
Provided in the present invention are a temperature effect calibration circuit and method for voltage measurement, and a battery management system and a vehicle. The temperature effect calibration circuit for voltage measurement comprises: a temperature measurement module, which performs measurement and outputs a temperature measurement signal; a sampling module, which samples a voltage to be measured; a reference voltage generation module, which generates a reference voltage; a quantization module, which converts into a digital signal an analog signal output by the sampling module; a compensation parameter calculation module, which performs quadratic fitting and calculation to obtain compensation parameters; and a temperature effect correction module, which corrects an output signal of the quantization module at a current temperature to obtain a corrected voltage measurement signal. In the present invention, there is no need to add a complex circuit design to an analog circuit domain, and thus the design is easier to implement; the requirement for a temperature coefficient of a device in the process is reduced, and thus the technical solution can be applied to various different process nodes; and calibration is performed at a digital backend, and only one instance of full-temperature-range scanning is required during the factory testing of a chip, without spending a large amount of time on a high/low-temperature test, thereby effectively reducing costs.
Absstract of: US2025379230A1
Systems and methods utilizing aqueous-based polymer binders for silicon-based anodes may include an electrode coating layer on a current collector, where the electrode coating layer is formed from a silicon carbon composite or SiOx-based or Si-Carbon-SiOx-based powder and a water soluble polymer and may comprise one or more additional materials. The anode may be in a lithium ion battery.
Absstract of: US2025379226A1
The present disclosure provides an aluminum alloy plate for a case of a secondary battery. The aluminum alloy plate includes 1.25 wt % to 1.5 wt % of manganese (Mn), and 0.6 wt % to 0.8 wt % of magnesium (Mg).
Absstract of: US2025379229A1
An anode for a secondary battery includes: an anode current collector, a first anode active material layer disposed on at least one surface of the anode current collector and including a first anode active material and a first binder, and a second anode active material layer disposed on the first anode active material layer and including a second anode active material, a second binder, and a conductive additive, wherein the conductive additive includes a conductive polymer and a water-soluble polymer having a weight average molecular weight of 10,000 g/mol to 100,000 g/mol.
Absstract of: US2025379223A1
A negative electrode active material, a method for preparing the same, a negative electrode composition and a negative electrode including the same, and a lithium secondary battery including the negative electrode are provided. The negative electrode active material comprises a silicon-based active material; and a carbon coating layer covering at least a portion of an outer surface of the silicon-based active material, the carbon coating layer comprising carbon having a Raman peak intensity ratio ID/IG of 0.1 to 1.2, the silicon-based active material including Si and optionally SiOx (0<x<2), and Si being comprised in an amount of 70 parts by weight or more based on 100 parts by weight of the silicon-based active material.
Absstract of: US2025379258A1
A secondary battery according to the present disclosure includes an electrode body with a zigzag structure, and an electrolyte solution. The electrode body includes a first outer surface and a second outer surface. The electrolyte solution includes a surplus solution that is disposed at least between the first outer surface and a case. The separator includes a plurality of first protrusion parts including a first bent part on the first outer surface, and a plurality of second protrusion parts including a second bent part on the second outer surface. A plurality of penetration holes are provided at the first protrusion part. A protrusion length of the second protrusion part is larger than a protrusion length of the first protrusion part.
Absstract of: US2025376375A1
A process for producing a sulfamyl fluoride composition includes providing a solution comprising fluorosulfonic acid, urea and a solvent; reacting the solution at a reaction temperature from 80° C. to about 170° C. to produce a mixture including sulfamyl fluoride, bis(fluorosulfonyl) imide, ammonium fluorosulfate and the solvent; separating the ammonium fluorosulfate from the mixture; and separating the mixture into a sulfamyl fluoride composition and a recycle composition, the sulfamyl fluoride composition including a higher concentration of sulfamyl fluoride and bis(fluorosulfonyl) imide than the recycle composition. A mole ratio of the fluorosulfonic acid to the urea in the solution is from about 1.80:1 to about 2.00:1.
Absstract of: US2025376374A1
A method for producing lithium hydroxide includes: reacting lithium carbonate with calcium hydroxide in a liquid to obtain a solution containing lithium hydroxide; subjecting the solution to solid-liquid separation into a liquid component containing the lithium hydroxide and a solid component comprising lithium derived from the lithium carbonate; and recovering the lithium hydroxide from the liquid component.
Absstract of: US2025376387A1
Simple, material-efficient microgranulation methods are disclosed for aggregating precursor particles into larger product particles with improved properties and, in some instances, novel structures. The product particles are useful in applications requiring uniform, smooth, spherical, or rounded particles such as for electrode materials in lithium batteries and other applications.
Absstract of: WO2025251336A1
A battery (100) and an electric device. The battery (100) comprises a plurality of battery cells (10) and a busbar member (20); the busbar member (20) comprises a first connection portion (21), a second connection portion (22) and a plurality of buffer portions (23); the plurality of buffer portions (23) are at least partially spaced apart in a first direction and are located between the first connection portion (21) and the second connection portion (22) in a second direction; the first connection portion (21) and the second connection portion (22) are respectively connected to different battery cells (10); the second direction is parallel to the arrangement direction of the plurality of battery cells (10); the first direction intersects the second direction. The buffer portions (23) can be stretched or compressed under the action of a pulling force, to absorb part of the external force and achieve a stress relief function, reducing the risks of structural failure or cracking in the busbar member (20) and the battery cells (10), enhancing the operational reliability of the battery (100).
Absstract of: US2025379346A1
An electrode assembly for an electrochemical cell comprises a current collector having opposed faces extending to a peripheral edge connected to a tab. The current collector tab has a tab height measured from the frame peripheral edge to a tab distal edge. An electrode active material is contacted to the current collector to form an electrode. A separator envelope housing the electrode comprises a separator collar having a collar height measured from the frame peripheral edge to a collar distal edge. The collar height is less than the tab height so that a distal portion of the current collector tab is left uncovered by separator material. A distal edge of the separator collar resides adjacent to an imaginary tab fold line along which the tab is intended to be folded. The imaginary fold line is intermediate the frame peripheral edge and the tab distal edge.
Absstract of: US2025379216A1
A negative electrode active material, a negative electrode including the same, and a lithium secondary battery including the negative electrode are provided. The negative electrode active material comprises a silicon-based active material; and graphite including natural graphite and artificial graphite, where an absolute difference between an average particle diameter of the natural graphite and that of the artificial graphite is 10% or less based on the average particle diameter of artificial graphite, and an absolute difference between an average particle diameter of the silicon-based active material and the average particle diameter of the artificial graphite is 40% or less based on the average particle diameter of artificial graphite.
Nº publicación: US2025379345A1 11/12/2025
Applicant:
SAMSUNG SDI CO LTD [KR]
SAMSUNG SDI CO., LTD
Absstract of: US2025379345A1
A secondary battery includes: an electrode assembly including an electrode stack including a first electrode, a separator, and a second electrode; a first electrode tab and a second electrode tab protruding from a top surface of the electrode stack; a first insulating member attached to the top surface of the electrode stack, a first surface of the first electrode tab, and a first surface of the second electrode tab; a second insulating member attached to a rear surface of the electrode stack, a second surface of the first electrode tab, and a second surface of the second electrode tab; a case having one opened surface, and to accommodate the electrode assembly; and a case cover to cover the opened surface of the case to seal the electrode assembly from the outside.
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