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1261
results.
Updated on
29/04/2025 [07:13:00]
Results 175 to 200 of 1261
Absstract of: WO2025081452A1
Provided are an electrochemical device and an electronic device. The electrochemical device comprises a positive electrode sheet. The positive electrode sheet comprises a positive electrode active material layer. The positive electrode active material layer comprises a first positive electrode active material and a second positive electrode active material. The first positive electrode active material contains an element Ni and an element Mn. The second positive electrode active material contains an element Co. During discharging of the electrochemical device, the relation curve of the capacity/voltage differential dQ/dV and the voltage V comprises a peak a with a peak position of 4.1 V-4.3 V and a peak b with a peak position of 3.6 V-4.0 V. The electrochemical device can have good cycle performance and safety performance while the energy density of the electrochemical device is improved.
Absstract of: WO2025081370A1
A battery cell, a battery, and an electric device. The battery cell comprises an electrode assembly, a casing, an electrode terminal, an insulating member, and a protective member. The casing comprises a wall portion, and the wall portion is provided with an electrode lead-out hole. The electrode assembly is accommodated in the casing, and the electrode assembly comprises a tab. The electrode terminal is electrically connected to the tab, and the electrode terminal comprises a terminal body passing through the electrode lead-out hole and a fixing portion connected to the terminal body. The insulating member is arranged around the terminal body, and at least part of the insulating member is located between the fixing portion and the wall portion so as to insulate and isolate the fixing portion from the wall portion. The protective member is arranged around the terminal body and is arranged in contact with the insulating member, and the tensile strength of the protective member is greater than that of the insulating member.
Absstract of: US2025130288A1
The invention relates to a method for determining the state of charge of an electric energy store comprising electric energy store cells and at least one sensor,in which method: in a first method step, operating parameters of the electric energy store are determined;in a second method step, at least one maximum state of charge and at least one minimum state of charge are determined as a temporal integral for each electric energy store cell on the basis of a current (I), a current measuring inaccuracy (ΔI), at least one capacitance, a correction value for the minimum state of charge (formula (IA)), and a correction value for the maximum state of charge (formula (IB)) of the electric energy store cells;the correction value for the minimum state of charge (formula (IA)) is determined by means of a minimum state of charge (formula (IIA)) on the basis of a filtered minimum open-circuit voltage (formula (III)) of the electric energy store;the correction value for the maximum state of charge (formula (IB)) is determined by means of a maximum state of charge (formula (IIB)) on the basis of a filtered maximum open-circuit voltage (formula (III)) of the electric energy store;wherein a maximum state of charge (SOCmax) of the electric energy store is the maximum of the maximum states of charge (formula (IVA)) of all the electric energy store cells, and a minimum state of charge (SOCmin) of the electric energy store is the minimum of the minimum states of charge (formula (IVB)) of all th
Absstract of: US2025130285A1
A thermal runaway sign detection device includes a measurement unit that measures a voltage fluctuation in a first mode in which a number of times that a fluctuating current is output from the secondary battery and voltage fluctuation of the secondary battery in response to the fluctuating current is measured is first number of times, and in a second mode in which the number of times is second number of times less than the first number of times. A detection unit detects a sign of thermal runaway in the secondary battery when a rate of change in a real part of an AC impedance obtained based on the voltage fluctuation measured by the measurement unit at the fluctuating current of a predetermined frequency at which an imaginary part of the AC impedance of the secondary battery calculated based on the voltage fluctuation becomes zero, is greater than a threshold value.
Absstract of: US2025129923A1
A lamp cell box includes a switch, a least one button cell, a metal elastic sheet and a box holder. The switch includes a body, a button and a contact terminal. The metal elastic sheet includes a first elastic contact part. The box holder includes a cell trough, a switch trough, an elastic sheet trough, a first connection port and a second connection port, where the button cell is disposed in the cell trough, a portion of the metal elastic sheet is disposed in the elastic sheet trough, the body is disposed in the switch trough, the contact terminal penetrates through the first connection port and is in electrical contact with the negative electrode of the button cell, and the first elastic contact part penetrates through the second connection port and is in electrical contact with the positive electrode of the button cell.
Absstract of: US2025133325A1
This application discloses an earphone and an earphone assembly. The earphone includes a housing, a speaker, a main circuit board, and a battery. All of the speaker, the main circuit board, and the battery are mounted in the housing. The main circuit board is located between the speaker and the battery. The main circuit board is disposed in an inclined manner relative to the speaker. A risk that the speaker of the earphone generates current noise is low, and sound quality of the earphone is good.
Absstract of: US2025132374A1
An enclosure body and a method for manufacturing an enclosure includes one of extruding and deep drawing an enclosure including a plurality of side walls defining a first cavity. The plurality of side walls are formed without stiffening portions. After extruding and deep drawing of the enclosure, forming a plurality of stiffening portions on the enclosure using an expandable punch, a hydraulic punch, and/or hydroforming.
Absstract of: US2025132415A1
A power battery heat exchanger, a power battery system and an electric vehicle are provided. The power battery heat exchanger comprises a connector, a first collecting tube assembly and a second collecting tube assembly which are arranged at intervals in a first direction, and a plurality of harmonica tubes arranged between the first collecting tube assembly and the second collecting tube assembly and arranged at intervals in a second direction. Each harmonica tube comprises a first end and a second end that are opposite to each other, an inlet of the connector is respectively in communication with first ends of one or more harmonica tubes through the first collecting tube, and an outlet of the connector is respectively in communication with first ends of remaining harmonica tubes through the collecting tube. Second ends of the plurality of harmonica tubes are in communication through the second collecting tube assembly.
Absstract of: US2025132380A1
A solid electrolyte, a positive electrode including the same, and an all-solid-state rechargeable battery, the solid electrolyte includes solid ion conductor particles; a coating layer on the solid ion conductor particles, the coating layer including a compound represented by Chemical Formula 1; and a lithium-deficient layer at an interface between the solid ion conductor particles and the coating layer:Li3+aM1bX16+c. Chemical Formula 1
Absstract of: US2025132340A1
The present disclosure relates to an electrochemical device that can simultaneously satisfy a high energy density of 400 Wh/kg or more, excellent lifespan characteristics, and stability. The electrochemical device according to the present disclosure includes a cathode; an anode including an anode current collector, or the anode current collector and lithium metal; and an electrolyte; wherein the cathode includes a cathode current collector; and a cathode active material layer formed on the cathode current collector, and including a porous binder scaffold and cathode active material particles.
Absstract of: US2025132419A1
The present application provides a loop-based thermal management method, apparatus, device, and system. A thermal management capacity deviation value in a current sampling stage is determined according to a rate of change of temperature difference and a temperature difference in a current sampling stage, and a thermal management capacity value is calculated according to a thermal management capacity value in a previous sampling stage and the deviation value. A corresponding number of chillers to be operated in the current sampling stage is determined according to the thermal management capacity value in the current sampling stage, and a target output cooling capacity of the chillers is determined according to a preset Cooling demand control strategy to control the chillers. This technical solution can reduce the energy consumption of the whole system. Furthermore, centralized control of the water loop improves the reliability and cooling efficiency of the battery cabinet.
Absstract of: WO2025081345A1
A potassium-embedded nickel-iron-manganese composite hydroxide, a sodium ion positive electrode material and preparation methods therefor, which belong to the technical field of sodium ion battery positive electrode materials. The preparation method for the potassium-embedded nickel-iron-manganese composite hydroxide comprises adding an additive during coprecipitation so as to perform doping of metal/non-metal ions. Compared with dry-mixing doping and sintering, the ions doped during the coprecipitation of a precursor are more uniformly distributed; in addition, performing potassium ion doping after the coprecipitation does not change the appearance of original particles, and under the action of a strong oxidant, potassium ions can enter hydroxide sites to form a prototype of a solid solution structure, so as to obtain a composite hydroxide solid solution. The potassium ions replace nickel/iron/manganese sites, thereby forming a single phase.
Absstract of: WO2025081765A1
A positive electrode sheet, a secondary battery, and an electric device. The positive electrode sheet comprises a positive electrode current collector, a positive electrode active material layer located on at least one side of the positive electrode current collector, and a base coating located between the positive electrode current collector and the positive electrode active material layer; the base coating comprises an additive, and the additive comprises a compound containing at least one group among a carboxylic acid group, a phosphate group, and a fluoro group. The provision of the base coating between the positive electrode current collector and the positive electrode active material layer can effectively reduce corrosion of an electrolyte to the positive electrode current collector. Moreover, the additive comprised in the base coating contains at least one group among the carboxylic acid group, the phosphate group, and the fluoro group and thus the additive can effectively complex and/or capture free aluminum ions, so that the effect of protecting the positive electrode current collector can be further achieved, and free aluminum ions can be prevented from migrating to a negative electrode, thereby avoiding damage to an SEI membrane by the free aluminum ions.
Absstract of: WO2025081348A1
The present disclosure relates to a method for separating, purifying and recovering an electrolyte, which method comprises the following steps: (1) mixing an electrolyte of a power battery with a stabilizer, and then subjecting same to a first reduced-pressure distillation treatment, so as to obtain an electrolyte solvent; (2) subjecting the electrolyte solvent obtained in step (1) to a second reduced-pressure distillation treatment, and separating same to obtain a first light component and a heavy component; and dehydrating the obtained first light component, so as to obtain a second light component; and (3) rectifying the second light component obtained in step (2), so as to obtain dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate; and crystallizing and melting the heavy component obtained in step (2), so as to obtain ethylene carbonate. In the present disclosure, all the solvents in the electrolyte of a power battery are separated and purified to obtain a re-commercializable carbonate product having a high yield and a high purity, thereby achieving green cyclic utilization of the electrolyte.
Absstract of: US2025132470A1
A battery cell stack assembly for a prismatic battery includes a plurality of monocells and two current collector bracket assemblies. Each monocell includes an anode electrode sheet having an outer perimeter and an anode cell tab and a cathode electrode sheet having a cathode cell tab. One of the current collector bracket assemblies electrically connect each of the anode cell tabs with one another and a remaining current collector bracket assembly electrically connects each of the cathode cell tabs with one another, and each current collect bracket assembly includes at least one arm that is positioned to electrically connect either two or more of the anode cell tabs or two or more of the cathode cell tabs to one another.
Absstract of: US2025132457A1
A battery thermal management system including an air induction device for drawing air to a battery pack, a controller, a valve that opens to permit the air to enter the battery pack, and a temperature sensor for generating signals indicative of a temperature within the battery pack. Upon receipt of a signal from the temperature sensor that is indicative of the temperature within the housing being above a predetermined threshold, the controller is configured to instruct the air induction device to begin drawing the air, and instruct the valve to open to permit the air to enter the battery pack and cool each of the battery cells and dilute the battery gases generated by the plurality of battery cells.
Absstract of: US2025132406A1
A system for calculating the maximum power limit of a battery pack for an electric vehicle includes one or more controllers in electronic communication with the battery pack. A plurality of battery open circuit voltage look-up tables and a plurality of direct current internal resistance (DCIR) look-up tables are stored in memory of the one or more controllers.
Absstract of: US2025132585A1
An power module includes a battery cell and a circuit board electrically connected to the battery cell. A number of the battery cell is one. The battery cell is configured to feed a first voltage to the circuit board. The battery cell includes a housing and an electrode assembly disposed in the housing. The circuit board includes a buck-boost circuit and at least two output terminals. The buck-boost circuit is configured to receive the first voltage and step up or step down the first voltage, so as to output at least two different second voltages to the at least two output terminals respectively. Each of the output terminals is configured to feed one of the second voltages to a drive circuit in a load electrically connected to the output terminal.
Absstract of: US2025132468A1
Proposed in the present disclosure is a current collector structure, including a positive current collector, in which the positive current collector includes a current collector body and a current collector leading-out tab connected to each other; in which the current collector body is provided with a center underflow hole through the current collector body in a thickness direction thereof, and an entire surface of a surface of the current collector body in the thickness direction is a welding surface configured to weld with a positive tab of a winding core. Proposed in the present disclosure is also a battery pack including the aforementioned current collector structure.
Absstract of: WO2025081403A1
The present disclosure belongs to the technical field of lithium battery recovery, and particularly relates to a recovery method used for waste lithium batteries and applied to lithium battery entire-chain integration. In view of valuable metals (such as nickel, cobalt and manganese) in waste lithium battery powder being insoluble in alkali, aluminum in the waste lithium battery powder can be removed by means of primary alkaline leaching; the aluminum-containing leachate is mixed with glycine, and the cooperative effect of glycine and copper ions is used, such that copper and aluminum are selectively leached out. The recovery method provided by the present disclosure can efficiently remove copper and aluminum at low cost, and improve the valuable metal recovery rate.
Absstract of: WO2025081728A1
The present application relates to a battery cell, a battery and an electrical apparatus. The battery cell comprises a casing and a first protective layer, the casing having a wall portion, the wall portion being provided with a weak portion, and the weak portion being configured to rupture when the internal pressure or temperature of the battery cell reaches a threshold value; the first protective layer is arranged on the wall portion and covers at least part of the weak portion. In the battery cell provided by the present application, the battery cell comprises the casing and the first protective layer, the casing has the wall portion, the wall portion is provided with the weak portion, the weak portion ruptures when the internal pressure or temperature of the battery cell reaches the threshold value, and the first protective layer covers at least part of the weak portion, so as to protect the weak portion, thus reducing corrosion of the weak portion, and ameliorating the impact on the bursting pressure of the weak portion.
Absstract of: WO2025081727A1
An energy storage power supply (100) comprising first and second battery modules and a battery management module (50). The battery management module (50) comprises an acquisition module (51) for acquiring operating parameters of the first and second battery modules, a charging-discharging module (52) electrically connected to the first battery module (10), a conversion module (53) electrically connected to both the first battery module (10) and the second battery module (30), and a control module (54).
Absstract of: WO2025081660A1
A positive electrode material and a preparation method therefor, and a lithium ion battery. The positive electrode material comprises: a core layer, the core layer comprising Li, Fe, Mn and PO4 - ions, and a doping element A; and a shell layer, wherein the outer surface of the core layer is coated with at least the surface of the shell layer, and the shell layer comprises first carbon particles and second carbon particles. The doping element A comprises at least one element of Al, Mg, Ni, Co, Ti, Ga, Cu, V, Nb, Zr, Ce, In, Zn and Y; the distance between the highest point and the lowest point in a single surface of the positive electrode material does not exceed 1 nm, and the surface roughness of the positive electrode material is 0.8 μm to 1.6 μm. By means of the two-time carbon coating process, the present application greatly reduces manganese dissolution while ensuring high capacity and high compaction of the positive electrode material, thereby ensuring the cyclic discharging efficiency of the positive electrode material.
Absstract of: US2025132325A1
A positive electrode with a positive electrode mixture layer provided on a surface of a positive electrode current collector, which includes a first layer contacting the positive electrode current collector and a second layer contacting the first layer. The first layer includes first active material particles with a particle diameter L. The second layer includes active material particles with a particle diameter R. Third positive electrode active material particles with a particle diameter r are included at least at an interface between the first and the second layers, wherein R>L>r. The first active material particles include a lithium transition metal composite oxide with a ratio of Co in metal element atoms other than Li of 2 atom % or more. The second and third active material particles including a different lithium transition metal composite oxide than the first active material particles.
Nº publicación: US2025132347A1 24/04/2025
Applicant:
LG ENERGY SOLUTION LTD [KR]
LG Energy Solution, Ltd
Absstract of: US2025132347A1
A conductive material dispersion includes a carbon-based conductive material, a main dispersant, an auxiliary dispersant, and a dispersion medium, wherein the main dispersant is a nitrile-based copolymer and the auxiliary dispersant is a copolymer including an oxyalkylene unit and at least one selected from the group consisting of a styrene unit and an alkylene unit.
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