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1807
resultados
Última actualización
12/05/2025 [07:18:00]
Resultados 950 a 975 de 1807
Resumen de: WO2025086593A1
A multi-element positive electrode material and a preparation method therefor, and a positive electrode sheet and a lithium ion battery using the multi-element positive electrode material. The multi-element positive electrode material is secondary particles formed by agglomerating primary particles, wherein the ratio of the total cross-sectional area of the primary particles having five or more grain boundaries to the cross-sectional area of the secondary particles is greater than or equal to 3:4; the porosity of the cross section of the secondary particles is less than or equal to 2%; each grain boundary is the contour line of an interface between the primary particles with the same structure and different orientations on the cross section of the secondary particles, and the length of the grain boundary is greater than or equal to 0.1 μm. The internal crystal grains of the multi-element positive electrode material are irregularly, non-radially and disorderly arranged, so that the multi-element positive electrode material has high powder compaction density and processing performance. Moreover, the positive electrode sheet containing the multi-element positive electrode material easily bears high rolling pressure, and does not easily break.
Resumen de: WO2025089789A1
The present invention provides a lithium secondary battery comprising: a negative electrode including a negative electrode current collector and a negative electrode active material layer formed on the negative electrode current collector; a positive electrode; an electrolyte including a lithium salt, an organic solvent, and an additive, wherein the negative electrode active material layer includes Si as a negative electrode active material, the organic solvent includes a fluoroethylene carbonate, and Z has a value of 0.1-0.2. X is the content (wt%) of Si on the basis of the total weight of the negative electrode active material in the negative electrode active material layer, and Y is the content (wt%) of the fluoroethylene carbonate on the basis of the total weight of the electrolyte after the activation of the lithium secondary battery.
Resumen de: WO2025089898A1
The present invention relates to a silicon-based negative electrode satisfying both high energy density and long lifespan, and a lithium secondary battery comprising same. Conventional lithium-ion batteries face challenges in improving energy density due to the capacity limitations of graphite negative electrode. To address this issue, high-capacity anode materials such as Si and SiOx have been researched. However, these materials suffer from electrode damage and accelerated electrolyte consumption caused by volume expansion of silicon during charge and discharge cycles. In order to overcome these problems, a lithium-ion battery anode was fabricated by combining silicon oxide with a silicon-carbon composite in the present invention. While silicon oxide offers high volumetric energy density, its cycle life is relatively short. Conversely, silicon-carbon composites mitigate volume expansion to extend cycle life but exhibit lower energy density. By adjusting the mixing ratio of these two materials, a negative electrode for a lithium secondary battery that achieves both high capacity and long lifespan is provided.
Resumen de: WO2025089904A1
The present invention relates to a sulfide-based solid electrolyte comprising lithium (Li), phosphorus (P), sulfur (S), and a halogen element, having an argyrodite-based crystal structure, at least a part of which is doped with aluminum (Al) and tin (Sn), and exhibiting an ion conductivity of 3.2 mS/cm or more at 30°C.
Resumen de: WO2025089887A1
The present invention relates to a cathode material for a lithium secondary battery. This cathode material for a lithium secondary battery comprises a cathode active material including lithium metal oxide particles containing lithium, nickel, cobalt, and manganese, wherein the surface of the cathode material may have an average roughness (Ra) of 1.0 µm or less as a first roughness measured as the average value for the active material in an arbitrarily measured range of 40 µm x 40 µm.
Resumen de: WO2025089889A1
Provided are a battery cell stack assembly and a battery pack comprising same. The battery cell stack assembly according to one aspect of the present specification comprises: cell stacks in which a plurality of battery cells are vertically stacked so that the leads are disposed on at least one of the sides, one side or the other side, in a horizontal first direction; and a cooling plate disposed between the plurality of battery cells, wherein the cell stacks, multiply provided, are arrayed in a horizontal second direction intersecting the horizontal first direction, and the cooling plate extends in the horizontal second direction so as to pass over the plurality of cell stacks arranged in the horizontal second direction.
Resumen de: WO2025088619A1
The present disclosure provides a process for preparing an electrode, the process comprising: (a) mixing an active material, a first conductive carbon, and a first binder to obtain a first mixture; (b) high shear mixing the first mixture with a second binder to obtain a second mixture, wherein the second binder is different from the first binder; (c) cooling the second mixture and blending with a second conductive carbon to obtain a third mixture; and (d) jet milling the third mixture and processing it to obtain the electrode. The present disclosure further provides an electrode obtained by the process as disclosed herein, and an electrochemical cell comprising at least one of the electrodes obtained by the process as disclosed herein.
Resumen de: WO2025088440A1
The present invention relates to a method for producing a carbon enriched material having a total metal content below 500 ppm and a pH value in the range of from 6.0 to 8.0. The method involves the steps of providing a biobased carbon precursor; subjecting the biobased carbon precursor to heat treatment in an inert atmosphere at one or more temperatures in the range of from 500 to 1500°C, wherein the heat treatment is carried out for a total time of from 0.5 to 10 hours, to obtain a carbon enriched material; providing the carbon enriched material with a carbon-based coating; subjecting the carbon enriched material to a de-mineralization treatment in an atmosphere comprising at least one halogen-containing gas, wherein the de¬ mineralization treatment is carried out at one or more temperatures in the range of from 800 to 1500°C for a time period in the range of from 5 minutes to 10 hours, so as to obtain a carbon enriched material having a total metal content below 500 ppm and a pH in the range of from 6.0 to 8.0; wherein the de-mineralization treatment is carried out after providing the carbon enriched material with a carbon-based coating.
Resumen de: WO2025088459A1
One aspect of the present invention provides a charging control system that is capable of effectively using regenerative electric power without wasting the regenerative electric power. Generated regenerative electric power is efficiently stored in a second secondary battery and then stored in a main first secondary battery. Charging from the second secondary battery to the first secondary battery is performed via a DC-DC converter. The charge state of the first secondary battery and the charge state of the second secondary battery are controlled. When the first secondary battery is close to full charge and is likely to deteriorate, it is possible to perform charging from the first secondary battery to the second secondary battery.
Resumen de: WO2025088588A1
The present disclosure provides a method (700) and a system (210) for balancing a battery pack (220) of an electric vehicle. The method includes simultaneously detecting (710), by a cell balancing system (210), a voltage and a current of cells in the battery pack (220), and a temperature of components of the battery pack (220). The method includes determining (720) a terminal voltage and a state of charge of the cells based on the voltage and the current of the cells. The method includes estimating (730) cell balancing duty cycles based on the terminal voltage and the state of charge of the cells, and cell balancing duty cycles based on the temperature of the components of the battery pack (220), and balancing (750) the cells based on a minimum duty cycle being estimated between the cell balancing duty cycles.
Resumen de: WO2025086724A1
A method for estimating the available capacity of a lead-acid storage battery, a method for assessing the state of health of a lead-acid storage battery, and a maintenance method for a lead-acid storage battery. The method for assessing the state of health comprises: obtaining a real-time discharge current of a lead-acid storage battery to be subjected to assessment; on the basis of a first constant coefficient and a second constant coefficient, obtaining an estimation result of the available capacity of said lead-acid storage battery; and on the basis of the available capacity of said lead-acid storage battery, an internal resistance of the battery and the temperature of the battery, performing degree-of-health assessment on said lead-acid storage battery by means of a lead-acid storage battery degree-of-health assessment model, so as to obtain an assessment result of the state of health of said lead-acid storage battery. By means of the present invention, an accurate estimation result of the available capacity of a lead-acid storage battery can be obtained, the state of health of the lead-acid storage battery to be subjected to assessment can be precisely determined, and on this basis, whether the lead-acid storage battery is in an abnormal state is determined, thereby effectively improving the maintenance efficiency of maintenance personnel for a railway communication machine room, and ensuring the stable and safe operation of a communication device.
Resumen de: WO2025086720A1
An energy storage apparatus (10) and a container (20) therefor. The container (20) comprises a box body (21) and battery cells (30). The battery cells (30) are accommodated in the box body (21). The dimension of the container (20) in the length direction and the dimension thereof in the width direction are respectively consistent with the dimensions of a standard container, and the dimension h of the container (20) in the height direction is smaller than the dimension H of one standard container in the height direction of the container (20).
Resumen de: WO2025086474A1
A sodium-ion battery positive electrode material, and a preparation method therefor and a use thereof. The chemical general formula of the sodium-ion battery positive electrode material is NamNixFeyMnzO2, wherein 0.1≤x≤0.25, 0.5≤y≤0.8, 0.1≤z≤0.25, 0.8≤m≤1.1, 0.95≤x/z≤1.05, x+y+z=1, m, x, y, and z respectively are molar percentages of corresponding elements, and components in the chemical general formula satisfy charge conservation and stoichiometry conservation. The preparation method comprises: using a co-precipitation method to prepare a precursor containing a nickel source, an iron source, and a manganese source in required stoichiometric amounts; mixing the precursor containing the nickel source, the iron source, and the manganese source with a sodium source at a specific ratio, then adding a doping element for primary sintering to obtain a doped sodium-ion battery positive electrode material; and carrying out secondary sintering on the doped sodium-ion battery positive electrode material and a coating to obtain a final sodium-ion battery positive electrode material. The sodium-ion battery positive electrode material has the advantages of high capacity, low residual alkali, and high stability.
Resumen de: WO2025089760A1
The present invention relates to an anode and a manufacturing method therefor. The anode comprises a first anode active layer and a second anode active layer on an anode current collector. Here, the degree of alignment (O.I) of each anode active layer of the anode satisfies a predetermined range, and thus high adhesion of the anode active layer to the anode current collector is implemented, thereby providing excellent lifespan characteristics. In addition, a lithium secondary battery comprising same has excellent output characteristics, and enables charging in a short time even at a 1C-rate.
Resumen de: WO2025089929A1
A battery management apparatus according to embodiments and experimental examples of the present invention may comprise: a command to detect the occurrence of an abnormality in a battery system; a command to detect a specific battery group in which an abnormality has occurred according to whether balancing is performed if an abnormality has occurred in the battery system; and a command to detect a specific battery in which an abnormality has occurred on the basis of the temperatures of a plurality of batteries in the specific battery group.
Resumen de: WO2025089677A1
The present embodiments relate to an anode active material for a lithium secondary battery, a method for manufacturing same, and a lithium secondary battery comprising same. The anode active material of the present invention comprises coarse carbon particles and fine carbon particles and satisfies expression 1 below.
Resumen de: WO2025089802A1
The present invention relates to an anode active material for a lithium secondary battery, the material comprising silicon particles which are in the form of single particles and have a polycrystalline structure, having an average HS circularity of 0.875 or higher, and satisfying the following Equation 1. Equation 1 Dv1 ≥ 2 μm, where Dv1 is a particle diameter corresponding to 1% of the cumulative volume in a particle diameter distribution curve of silicon particles.
Resumen de: WO2025089699A1
The present invention provides a polyimide film comprising: a polyimide comprising, as repeating units, an anhydride monomer and a diamine monomer; and nanoparticles having an average particle size of 100 to 500 nm, wherein the polyimide film has a breakdown voltage (BDV) of 350 kV/mm or more and a surface roughness (Ra) value of 0.01 nm or more.
Resumen de: WO2025089799A1
The present invention relates to an anode active material for a lithium secondary battery, the material having silicon particles which satisfy the following Equation 1. Equation 1 0.70 ≤ Dv50 - Dv10 / Dv90 - Dv50 ≤ 0.80, where Dv50, Dv10, and Dv90 are particle diameters corresponding to 50%, 10%, and 90%, respectively, of the cumulative volume in a particle diameter distribution curve of silicon particles.
Resumen de: WO2025089934A1
The present invention relates to a cathode active material for a lithium secondary battery, comprising: a lithium metal oxide in a discrete-particle form; and a coating layer which is arranged on the surface of the lithium metal oxide and which contains cobalt, wherein: the coating layer is attached to the surface of the lithium metal oxide, and is in an island form including a plurality of attached particles spaced apart from each other; and the average coating rate of the coating layer is 35 to 48 area% on the basis of the total surface area of a discrete particle.
Resumen de: WO2025088457A1
Provided is a novel positive electrode active material. Also provided is a battery with excellent charge and discharge characteristics. This battery has a positive electrode. The positive electrode has a positive electrode active material layer. The positive electrode active material layer has positive electrode active material particles containing magnesium, titanium, nickel, aluminum, and lithium cobalt oxide. XPS analysis of the plurality of positive electrode active material particles in the positive electrode active material layer shows a peak in the range from 850 eV to 860 eV inclusive and at a position at least 0.5 eV higher than the peak position in XPS analysis of nickel(II) oxide.
Resumen de: WO2025087261A1
The present invention belongs to the technical field of lithium battery manufacturing, and particularly relates to a battery cell assembly winding apparatus and method and an electrode sheet fly-cutting mechanism, solving the problem of long auxiliary time and low efficiency caused by the need of deceleration or stopping for electrode sheet or separator cutting. The battery cell assembly winding apparatus comprises a turret; a first station and a second station are arranged on the turret; winding needles are respectively arranged on the first station and the second station; two electrode sheet cutter driving rollers symmetrically arranged along an electrode sheet conveying channel are arranged at an electrode sheet feeding end of the first station; electrode sheet cutters are arranged on the electrode sheet cutter driving rollers; the electrode sheet cutters on the two electrode sheet cutter main driving rollers are arranged in a staggered manner and can be meshed with each other during the rotation of the two electrode sheet cutter driving rollers; the two electrode sheet cutter driving rollers are respectively connected to respective first translation driving mechanisms; and a separator cutting mechanism is arranged between the first station and the second station. Short auxiliary time, high winding efficiency and excellent winding effects are achieved.
Resumen de: WO2025086284A1
An electrolyte, a secondary battery, and an electric device. The electrolyte comprises a first fluoroether solvent and a second fluoroether solvent, wherein the number of carbon atoms in the first fluoroether solvent is greater than 4, and the number of carbon atoms in the second fluoroether solvent is not greater than 4. The electrolyte can improve the cycling stability of a battery.
Resumen de: WO2025086481A1
The present application relates to the technical field of batteries. Provided are a battery cell, a battery and an electrical device. The battery cell comprises an electrode assembly and a current collection member, the electrode assembly comprising an electrode main body and tabs provided at the ends of the electrode main body; the current collection member is provided on a tab, and part of the outer edge portion of the current collection member coincides with the outer edge portion of the tab, such that part of the tab is exposed outside. In the battery cell provided by the present application, the outline dimension of the current collection member is smaller than that of the tab, such that the current collection member does not fully cover the tab. Thus, during laser welding of the current collection member and the tab, a laser beam can be incident laterally, so as to form a small acute angle with the plane where the tab is located, thereby lowering the probability of separator damage caused by the laser beam being vertically incident on the plane where the tab is located, and improving the yield of electrode assembly manufacturing.
Nº publicación: WO2025086609A1 01/05/2025
Solicitante:
SHANGHAI JIAO TONG UNIV [CN]
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Resumen de: WO2025086609A1
The present invention provides a high-voltage energy storage power system and a battery cluster state precise sensing method thereof. The high-voltage energy storage power system comprises: a battery cluster, a start-up protection circuit, PCS units, a fault bypass circuit, a direct-current side filter inductor, a bus capacitor, PCS unit sub-controllers, and a BMS; direct-current side positive electrodes of the PCS units are sequentially connected in series to the direct-current side start-up protection circuit, the battery cluster, and the direct-current side filter inductor, and then connected to direct-current side negative electrodes of the PCS units; alternating-current side positive electrodes of the PCS units are sequentially connected in series; the bus capacitor is connected in parallel to two electrodes at a direct-current side of each PCS unit; the PCS unit sub-controllers are respectively connected to the fault bypass circuit, the PCS units, the start-up protection circuit, and the BMS; and the BMS is connected to the battery cluster.
BOPI
Sede Electrónica
