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1525
resultados
Última actualización
12/09/2025 [07:43:00]
Resultados 1350 a 1375 de 1525
Resumen de: US2025273694A1
The present disclosure is generally directed to current collectors for electrochemical cells and methods of fabricating current collectors. In some implementations, a current collector includes a terminal electrically connectable to an external electric circuit. The current collector includes a substrate including an electrically conductive material and having a first end portion and a second end portion. The terminal is disposed on the first end portion. The substrate has a length from the first end portion to the second end portion. The electrically conductive material has a cross-sectional area decreasing along at least a portion of the length in a longitudinal direction from the terminal to the second end portion of the substrate.
Resumen de: US2025273750A1
This application relates to a negative current collector. At least one surface of the negative current collector is overlaid with a LixM alloy layer, in which 0
Resumen de: US2025273672A1
Disclosed is a positive active material for a rechargeable lithium battery including secondary particles of a nickel-based transition metal oxide composed of an inner portion and an outer portion, wherein the inner portion has a dense structure having a higher density than the outer portion, the secondary particles of the nickel-based transition metal oxide have a plurality of protruding portions on the surface thereof, and the positive active material has an area ratio of 25% to 30% occupied by the protruding portions calculated by Equation 1 based on a cross-section of the secondary particles of the nickel-based transition metal oxide.
Resumen de: US2025273828A1
A power storage device includes a stacked electrode assembly and a seal member. An electrode plate (bipolar electrode) having a positive electrode layer and a negative electrode layer is stacked between a positive-electrode termination electrode and a negative-electrode termination electrode with a separator being interposed between the electrode plate and each of the positive-electrode termination electrode and the negative-electrode termination electrode so as to form a stacked electrode assembly. An uncoated portion of the negative-electrode termination electrode (current collector) and an uncoated portion of the electrode plate (current collector) extend in a stacking direction of the stacked electrode assembly together with the separator adjacent to each of the uncoated portions, and are folded so as to be stacked on the positive-electrode termination electrode with the separator being interposed between each of the uncoated portions and the positive-electrode termination electrode, thereby forming a crushing-time discharging portion.
Resumen de: US2025273737A1
A secondary battery and an electric device comprising the secondary battery. The secondary battery comprises: a negative electrode sheet and an electrolyte, where the negative electrode sheet comprises a silicon-carbon composite material and the silicon-carbon composite material has a three-dimensional network crosslinked pore structure; and the electrolyte comprises a carboxylate compound.
Resumen de: WO2025175805A1
The present application relates to the field of materials. Provided are a graphite negative electrode material, a preparation method therefor, a lithium ion battery and an electrical device. The preparation method for the graphite negative electrode material comprises: graphitizing a coke feedstock, so as to obtain a graphite aggregate; mixing asphalt with a polymer modifier, and carrying out a first heat treatment in a protective atmosphere, so as to obtain modified asphalt, the polymer modifier comprising one or more of a styrene-butadiene-styrene block copolymer, a hydrogenated styrene-butadiene block copolymer, an ethylene-vinyl acetate copolymer, styrene butadiene rubber, a styrene-isoprene copolymer and a styrene-ethylene-butylene-styrene block copolymer; mixing the graphite aggregate with the modified asphalt, and then carrying out a second heat treatment for granulation, so as to obtain a precursor; and carrying out a third heat treatment on the precursor, and performing screening and demagnetization, so as to obtain the high-energy-density and fast-charging graphite negative electrode material. The graphite negative electrode material obtained by the method provided by the present application has high energy density and superfast-charging performance.
Resumen de: US2025273840A1
A manufacturing method disclosed herein includes a preparing step of preparing an assembly including a case in which a resin member is attached to an electrolyte solution injection hole, and a sealing step of sealing the electrolyte solution injection hole after an electrolyte solution is injected. The resin member includes a shaft part that is hollow, a penetration hole, and a surplus part that rises up at a periphery of the penetration hole outside the case. In the sealing step, the penetration hole is closed by melting at least the surplus part.
Resumen de: US2025273669A1
A positive electrode active material includes a lithium nickel-based oxide which is a single particle composed of one single nodule, a quasi-single particle which is a composite of at most 30 nodules, or a combination thereof. The positive electrode active material has a D90 ranging from 8.0 μm to 11.5 μm, and a negative skewness factor (NSF) represented by Equation 1 below ranges from 0.20 to 0.35:NSF=(D50 - D10)/ImaxEquation1D50 is a particle diameter at a cumulative volume of 50% in a volume cumulative particle size distribution graph of the positive electrode active material. D10 is a particle diameter at a cumulative volume of 10% in a volume cumulative particle size distribution graph of the positive electrode active material. Imax is a maximum volume fraction in the volume cumulative particle size distribution graph of the positive electrode active material.
Resumen de: US2025273810A1
Provided are a battery module, and a battery pack and a vehicle including the same. A battery module according to an embodiment includes a battery cell stack in which a plurality of battery cells are stacked, a case in which the battery cell stack is accommodated, the case including a first outlet through which gas is discharged, an exhaust path member mounted on the case to provide a gas discharge path through which gas is discharged but a flame is prevented from leaking out, and a cover coupled to the case to cover the exhaust path member, the cover including a second outlet through which gas moving through the exhaust path member is discharged, wherein a covering portion included in the case is provided to adjust a length.
Resumen de: US2025273798A1
An energy storage cabinet includes a cabinet body and a partition assembly, an upper installation space and a lower installation space are arranged in the cabinet body; slide rails are respectively arranged on two opposite inner walls of the cabinet body; the slide rails are arranged between the upper installation space and the lower installation space; and grooves are arranged on upper side surfaces of the sliding rails. The partition assembly is used for separating the upper installation space and the lower installation space, and is provided with a roller which can be snapped into the groove and can roll along the slide rail to move the partition assembly out of the cabinet. When the electrical element breaks down and needs to be taken out, the partition assembly can be pulled out, so that the roller can move out of the groove and roll on the slide rail.
Resumen de: US2025273801A1
The present disclosure relates to a battery pack. The battery pack includes a first array including a plurality of first battery cells arranged side by side, a second array including multiple second battery cells arranged side by side, a plurality of partition plates located between the first array and the second array and configured to electrically isolate the first array from the second array, and a plurality of support members located between the first array and the second array, wherein the second array is supported against the first array via the plurality of support members.
Resumen de: US2025273816A1
Electrochemical devices are disclosed for various applications such as secondary batteries. In an embodiment, an electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte. The separator includes a porous membrane including a core-shell structure that includes formed on at least one polyolefin strand. The coating shell includes one or more of a hydrophilic inorganic material or a hydrophilic polymer. The electrolyte includes a nitrile-based compound. The electrochemical device exhibits high ionic conductivity by including the porous separator having wettability to the electrolyte.
Resumen de: US2025273811A1
A battery system includes: a coffin having a battery compartment and a sand-filled compartment separated from the battery compartment; and a battery pack accommodated within the battery compartment. The battery pack includes a pack housing, a plurality of battery cells accommodated within the pack housing, and a pack venting element in the pack housing configured to exhaust venting gases from the pack housing. The sand-filled compartment forms a venting channel filled with sand and is configured to guide venting gases exhausted from the pack venting element through the sand to a venting outlet in the coffin in the event of a thermal runaway of one or more of the battery cells of the battery pack.
Resumen de: WO2025175681A1
An electrode sheet rolling and slitting system (10), comprising: a slitting mechanism (11), a pre-slitting detection mechanism (12), a plurality of post-slitting detection mechanisms (13), a conveying mechanism (14), an encoder (15), a programmable logic controller (16), and a marking mechanism (17). The pre-slitting detection mechanism is configured to perform surface defect detection on a first electrode sheet before slitting. The plurality of post-slitting detection mechanisms are configured to perform surface defect detection and tab area size measurement on a plurality of second electrode sheets after slitting; and the plurality of post-slitting detection mechanisms are in one-to-one correspondence with the plurality of second electrode sheets. The pre-slitting detection mechanism and the post-slitting detection mechanisms each comprise a macro camera (121, 131), a superordinate computer (122, 132), and an acquisition card unit (123, 133). Also provided is an electrode sheet rolling and slitting method. The system can obtain clear, fine and distortionless detection images, thereby accurately determining surface defects of electrode sheets.
Resumen de: WO2025175666A1
Disclosed in the present invention are a method and system for testing the air tightness of a battery pack, the method comprising: step S1, by means of an upper-computer APP, setting air tightness test parameters comprising a target test air pressure and an allowable leakage rate; step S2, the upper-computer APP generating an inflation policy in light of an air inflow rate per unit time and the target test air pressure, and issuing same to a lower-computer program; step S3, the lower-computer program stepwise inflating a battery pack on the basis of the inflation policy until the battery pack reaches the target test air pressure, and displaying a real-time air pressure value; step S4, the lower-computer program stopping inflating the battery pack, and waiting until the air pressure of the battery pack is stable; step S5, the upper-computer APP acquiring from the lower-computer program the difference between an initial air pressure and a final air pressure during a leakage test time period, calculating a leakage rate per unit time and, on the basis of the allowable leakage rate set in step S1, determining whether the air tightness of the battery pack passes; and step S6, the lower-computer program controlling the battery pack to deflate. The present invention can improve the precision of testing the air tightness of batteries, helping to improve the production quality of the batteries.
Resumen de: WO2025175683A1
An electrolyte injection system (100) and an electrolyte injection method. The electrolyte injection system (100) comprises an electrolyte injection device (110), an upper computer (120), and a control device (130). The electrolyte injection device (110) is used for injecting an electrolyte into a battery cell in a battery cell electrolyte injection process. The upper computer (120) is used for: acquiring electrolyte injection data of the battery cell after battery cell electrolyte injection is completed, and locally recording the electrolyte injection data of the battery cell as historical electrolyte injection data; determining a first battery cell set placed in a battery cell tray that currently enters the electrolyte injection device (110); on the basis of the local historical electrolyte injection data, determining from among the first battery cell set a second battery cell set, electrolyte injection of which has not been completed; determining from among the second battery cell set a target battery cell set to be subjected to electrolyte injection; and sending to the control device (130) the position of each target battery cell in the target battery cell set in the battery cell tray. The control device (130) is used for controlling the electrolyte injection device (110) to perform electrolyte injection on the target battery cell set on the basis of the position corresponding to each target battery cell.
Resumen de: US2025273655A1
A method for producing a positive electrode active material which can minimize the surface degradation of a positive electrode active material which occurs in a washing process, effectively control residual lithium, and form a uniform coating layer on the surface of the positive electrode active material, the method including the steps of: preparing a lithium transition metal oxide; mixing the lithium transition metal oxide and a first washing solution to first wash and then first filter the lithium transition metal oxide; simultaneously second washing and second filtering the lithium transition metal oxide using a filter device capable of washing and filtering simultaneously with a second washing solution; and drying the lithium transition metal oxide, then mixing a coating element-containing raw material with the dried lithium transition metal oxide and heat-treating the mixture to form a coating layer. A positive electrode active material produced by the method is also provided.
Resumen de: US2025273794A1
A battery cell includes a housing, an electrode assembly, and an insulating member. The housing includes a first wall. The electrode assembly is housed within the housing. The insulating member is covered on an outer side of the housing and covers an outer surface of the first wall that is away from the electrode assembly in a thickness direction of the first wall. The insulating member is further provided with a first hollow region; along the thickness direction of the first wall, the first hollow region is positioned on a side of the first wall that is away from the electrode assembly; the first wall forms a first exposed region at a position corresponding to the first hollow region; and the first exposed region is configured for connecting with a compression strip.
Resumen de: US2025273651A1
Provided is a lithium secondary battery negative electrode active material including a pre-lithiated silicon oxide-based complex containing Al, Li, and Si. More particularly, the present disclosure relates to a lithium secondary battery negative electrode active material and a production method thereof in which aluminum (Al) is additionally mixed and heat treated during pre-lithiation of a silicon oxide-based negative electrode active material, such as SiOx(0<x<2), to form compounds, such as Al2O3 and Li2SiO3, which have the effect of preventing the silicon oxide-based negative electrode active material from cracking, which occurs due to shrinkage and expansion of the silicon oxide-based negative electrode active material during charging and discharging of a battery.
Resumen de: US2025273800A1
An electric storage device includes: a first case that houses a first cell group; and a second case that houses a second cell group. Each of the first cell group and the second cell group includes a plurality of electric storage cells that is connected in a first direction. The first case includes an opening portion at one end in a second direction orthogonal to the first direction. The first case and the second case are disposed such that the second case closes the opening portion of the first case.
Resumen de: WO2025177668A1
The present invention suppresses a decrease in temperature of a coating film when transferring a base material from a first drying part to a second drying part. Specifically, a drying apparatus 10 comprises: a first drying part 11 that dries a coating film P applied on a base material W; and a second drying part 12 that further dries the coating film P of the base material W transferred from the first drying part 11. The first drying part 11 includes: a first heating device 21 for heating the coating film P; and a second heating device 22 for raising the atmospheric temperature of the first drying part 11, or heating the base material W or the coating film P at the first drying part 11.
Resumen de: WO2025177605A1
Provided are a method for manufacturing a retort using an Ni-based alloy containing 2.0% by weight or more of Al, a retort employing the Ni-based alloy, and a rotary kiln provided with the retort. A retort manufacturing method according to the present invention is a method for manufacturing a retort by plasma-welding a joint part of a base material made of an Ni-based alloy, without using a filler. The retort of the present invention comprises a base material made of an Ni-based alloy containing 90.0 % by weight or more of Ni and 2.0 % by weight or more of Al, and a weld metal portion generated at a joint part of the base material, wherein the base material comprises a heat affected zone generated around the weld metal portion, and a base material portion, which is the part of the base material other than the heat affected zone, and a value obtained by (formula 1) (average crystal grain size of heat affected zone/average crystal grain size of base material portion) × 100 is 100 to 300%, and/or the average crystal grain size of the heat affected zone is less than 250 μm. The rotary kiln of the present invention is provided with the retort of the present invention.
Resumen de: WO2025177409A1
This negative electrode material for lithium-ion secondary batteries comprises composite particles, a silicon carbide layer, and a coating layer. The composite particles include amorphous carbonaceous particles, and amorphous silicon particles having an average primary particle size of 1 nm to 50 nm inclusive. The silicon carbide layer is between the composite particles and the coating layer. The film thickness of the silicon carbide layer is 1 nm to 100 nm inclusive. The coating layer includes a magnesium or fluorine compound.
Resumen de: WO2025177401A1
This negative electrode material for lithium-ion secondary batteries contains silicon particles. The silicon particles have an average particle size of 0.1 μm to 10 μm, inclusive. The Mg or F concentration of the silicon particles at a first measurement point is higher than the Mg or F concentration of the silicon particles at a second measurement point. The Mg or F concentration of the silicon particles at the second measurement point is higher than the Mg or F concentration of the silicon particles at a third measurement point. The first measurement point is located on the surface of the silicon particles. The second measurement point is located between the geometric center and the surface of the silicon particles. The third measurement point is located at the geometric center of the silicon particles.
Nº publicación: WO2025175651A1 28/08/2025
Solicitante:
CONTEMPORARY AMPEREX TECH CO LIMITED [CN]
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Resumen de: WO2025175651A1
An adhesive coating test system (10) and an adhesive coating test method for cylindrical battery cells (20). The adhesive coating test system (10) comprises test positions (1a), a control device, rotating mechanisms (4) and visual inspection modules (3). Each rotating mechanism (4) is arranged at a test position (1a), the rotating mechanism (4) comprises a rotating motor (41), a driving wheel set (42) and a driven wheel set (43), and a coder (2) is provided in the driven wheel set (43). In response to a cylindrical battery cell (20) coated with adhesive reaching a test position (1a), the control device controls a visual inspection module (3) to move to an image acquisition point position of the cylindrical battery cell (20), and controls the rotating motor (41) to drive the driving wheel set (42) so as to drive the cylindrical battery cell (20) to rotate, such that the cylindrical battery cell (20) drives the driven wheel set (43) and the coder (2) to rotate in the rotating process. During the rotation process of the coder (2), an acquisition trigger signal is output to the visual inspection module (3) according to a set frequency, so as to control the visual inspection module (3) to perform image acquisition on the side surface of the cylindrical battery cell (20) according to the set frequency, thus performing defect detection on adhesive coating of the side surface of the cylindrical battery cell (20).
BOPI
Sede Electrónica
