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1441
results.
Updated on
07/08/2025 [09:25:00]
Results 200 to 225 of 1441
Absstract of: EP4597627A1
This application provides a positive active material. The positive active material is a composite of NaxRy(PO4)z(P2O7)k and C, where 1 ≤ x ≤ 7, 1 ≤ y ≤ 4, 1 ≤ z ≤ 2, 1 ≤ k ≤ 4, and R includes at least one of Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Sn, Hf, Ta, W, or Pb; and a water content of the positive active material is not higher than 1600 ppm. This application further provides a method for preparing the positive active material, a positive electrode plate containing the material, a secondary battery, and an electrical device. The positive active material of this application contains a relatively low water content, and can effectively alleviate or avoid difficulty of processing of the positive active material, and contribute to a relatively high level of specific charge capacity, specific discharge capacity, and first-cycle Coulombic efficiency of the positive electrode plate and secondary battery containing the material.
Absstract of: EP4597675A1
This application provides a sodium secondary battery electrolyte, a sodium secondary battery, and an electrical device. The sodium secondary battery electrolyte includes a solvent. A percentage of an amount of substance of a free solvent in relation to a total amount of substance of the solvent in the electrolyte is not greater than 50%. The electrolyte can improve the high-temperature cycle performance of the battery, reduce the high-temperature gassing amount of the battery, and improve the electrochemical performance and safety performance of the battery at high temperature.
Absstract of: EP4597596A1
A method of estimating an electrode density in secondary batteries according to one or more embodiments of the present disclosure includes: preparing an electrode comprising a current collector and first and second coating layers coated on the current collector; measuring first characteristic values of the electrode; removing the first coating layer of the electrode; measuring second characteristic values of the electrode from which the first coating layer has been removed; removing the second coating layer of the electrode from which the first coating layer has been removed; measuring third characteristic values of the electrode from which the first and second coating layer have been removed; and estimating at least one of a density of the first or second coating layer, a thickness of the current collector, or a weight of the current collector, based on the first characteristic values, the second characteristic values, and the third characteristic values.
Absstract of: EP4597656A1
A cylindrical secondary battery including an electrode assembly including a negative electrode plate and a positive electrode plate; a cylindrical can accommodating the electrode assembly and including a terminal hole in one side of the cylindrical can and an open inlet in another side of the cylindrical can; a terminal coupled to the cylindrical can through the terminal hole; and a negative electrode current collector in the cylindrical can and electrically connecting the cylindrical can to the negative electrode plate. The negative electrode current collector includes a notch groove or a cutting hole configured to be cut in response to an increase in pressure in the cylindrical can.
Absstract of: EP4597719A1
Embodiments of this application provide an electrode assembly, a battery cell, a battery, an electric device, and a method for manufacturing a separator, and pertain to the field of battery technologies. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator, and the separator is disposed between the positive electrode plate and the negative electrode plate; and the separator includes a first section, a second section, and a third section arranged sequentially in a width direction of the separator, and a porosity of the second section is less than both a porosity of the first section and a porosity of the third section. The electrode assembly provided by the embodiments of this application includes a separator with different porosities in different sections, which can alleviate precipitation of metal ions in the electrode assembly.
Absstract of: EP4597670A1
A gel electrolyte composition, a secondary battery, a battery module, a battery pack, and an electrical device are disclosed. A viscosity of the gel electrolyte composition at 25 °C is 500 mPa·s to 100000 mPa·s. The gel electrolyte composition falls within an appropriate viscosity range, thereby increasing the interface wettability of the battery and the ionic conductivity of the gel electrolyte composition at a room temperature and a high temperature, and on the other hand, alleviating interface side reactions of the gel electrolyte composition and improving the Coulombic efficiency of the battery.
Absstract of: EP4596494A1
A preparation method for a lithium iron phosphate material with low iron phosphide content is provided, including the following steps: mixing and dissolving anhydrous iron phosphate with a lithium source, a carbon source, a dopant and deionized water to obtain a mixed solution; conducting wet grinding and spray drying on the mixed solution to obtain a sintering precursor; conducting heat treatment and pulverization on the sintering precursor to obtain a lithium iron phosphate material, where the heat treatment process includes preheating, low-temperature sintering, high-temperature sintering, and cooling, a preheating temperature is lower than a low-temperature sintering temperature, the low-temperature sintering temperature is lower than a high-temperature sintering temperature, and a cooling temperature is lower than the high-temperature sintering temperature. The heat treatment process is conducted under a rare gas atmosphere, and the rare gas content in the high-temperature sintering is greater than that in the low-temperature sintering. Compared with the conventional process, the lithium iron phosphate material has high purity, remarkably reduces the iron phosphide content, maintains a high compaction density, and has excellent electrochemical performance. A lithium iron phosphate material and a lithium-ion battery using the lithium iron phosphate material are further provided.
Absstract of: EP4597702A1
The present invention relates to a battery module and a method for determining a center of a battery cell, and more particularly, to a battery module and a method for determining a center of a battery cell, in which a central position of the battery cell is capable of being contactlessly measured to prevent misalignment of the battery cell and prevent damage to the battery cell to improve quality of the battery module.The battery module according to the present invention is characterized by including a plurality of battery cells, and a battery cell case that accommodates the plurality of battery cells, wherein a central position of each of the plurality of battery cells in a longitudinal direction is marked on a surface of the battery cell.
Absstract of: EP4597133A1
The apparatus for diagnosing a battery according to the present disclosure includes a profile obtaining unit configured to obtain a battery profile representing a correspondence relationship between voltage and capacity of a battery; a profile adjusting unit configured to adjust a preset reference positive electrode profile and a reference negative electrode profile to correspond to the battery profile to generate an adjusted positive electrode profile and an adjusted negative electrode profile; and a control unit configured to extract a diagnostic factor for the battery from at least one of the adjusted positive electrode profile and the adjusted negative electrode profile and diagnose a state of the battery based on the extracted diagnostic factor.
Absstract of: EP4596194A2
Disclosed is a battery cutting apparatus, including a carrying assembly, a first cutter assembly, a first driving assembly, a second cutter assembly and a second driving assembly. The carrying assembly is configured to carry a battery to be cut. The first driving assembly is in transmission connection with at least one of the first cutter assembly and the carrying assembly and configured to make them move relative to each other along a first direction. The second driving assembly is in transmission connection with at least one of the second cutter assembly and the carrying assembly and configured to make them move relative to each other along a second direction perpendicular to the first direction. At least one of the first and second cutter assembly is a pressing and cutting cutter assembly, which is configured to be able to press and break the housing of the battery.
Absstract of: EP4597622A1
The present disclosure is intended to provide a production method for a positive electrode active material with reduced degradation in resistance property. The technology disclosed herein relates to a production method for a positive electrode active material after sintering, the method comprising: a preparation step of preparing an end material that includes a positive electrode composite material including a positive electrode active material for a secondary battery and a binder containing fluorine; and a sintering step of sintering the positive electrode composite material in a container, wherein the sintering step is performed with magnesium hydroxide present in the container. Consequently, a positive electrode active material with reduced degradation in resistance property is achieved.
Absstract of: EP4597733A1
A busbar assembly according to one embodiment of the present disclosure includes: a busbar including a body and end portions that extend from both ends of the body and have through holes defined therein; an insulating layer that encloses the body and has a groove formed in a recessed shape; and a cap that is inserted into the groove and encloses the end portions, wherein the insulating layer has a stronger elasticity than the cap.
Absstract of: EP4596495A1
The present invention relates to a carbon nanotube dispersion, comprising carbon nanotubes, a first dispersant containing a nitrogen atom, a mixture of a second dispersant and cations, and a solvent, wherein the second dispersant contains at least one hydroxy group and at least one carboxyl group in an aromatic ring, and the cations contain at least one selected from the group consisting of an alkali metal ion, an alkaline earth metal ion, an aluminum ion, a transition metal ion, an ammonium ion and a sulfonium ion, and a method for preparing the same.
Absstract of: EP4597631A2
The invention pertains to the use of porous, chemically interconnected, carbon nanofibres-comprising carbon networks as electrochemically active material in the anode of lithium or sodium batteries. It has been found that said carbon nanofibres-comprising carbon networks can beneficially be used in the anode of lithium or sodium batteries when added in an amount of 10 - 100 wt%. The benefits include a high capacity, high lifetime (stability over extended cycling), high charge and discharge rate and being resilient during manufacture and use. The porous, chemically interconnected, carbon nanofibres-comprising carbon networks can be used in the anode of lithium or sodium batteries of many areas of technology, such as smartphones, laptops and electric and hybrid vehicles.
Absstract of: EP4597669A1
The present application refers to secondary battery and battery module, battery pack and apparatus including the secondary battery. In particular, the secondary battery includes a housing as well as an electrode assembly and an electrolyte contained in the housing; the electrode assembly includes a positive electrode plate, a negative electrode plate and a separator, and the positive electrode plate includes a positive current collector and a positive electrode film that is disposed on at least one surface of the positive electrode current collector and includes a positive electrode active material; the positive electrode active material includes one or more of lithium nickel cobalt manganese oxide and lithium nickel cobalt aluminum oxide; the negative electrode plate includes a negative electrode current collector and a negative electrode film that is disposed on at least one surface of the negative electrode current collector and includes a negative electrode active material; the negative electrode active material includes silicon-based material and carbon material; and the secondary battery satisfies: 0.05≤Z≤0.6. The secondary battery has the characteristics including high energy density, fast charging and long cycle life.
Absstract of: EP4597521A2
The present invention relates to a ceramic solid electrolyte, which is a key component of an all-solid-state lithium secondary battery, for improving safety, and a method for synthesizing the same. The present invention relates to an oxide-based conductive ceramic of a new NASICON structure of the chemical formula Li1+xZr2XxP3-xO12 (X=Sn, Ge, or Y, 1.5≤ x≤2.3). The present invention relates to a method for manufacturing an oxide-based conductive ceramic having the above novel NASICON structure.
Absstract of: EP4597688A1
The present disclosure relates to an apparatus and method for battery cooling control. An apparatus for battery cooling control according to some embodiments includes a cooling water control apparatus configured to control the supply of cooling water for cooling a battery system, and a control apparatus configured to obtain the state of charge and charge/discharge rate of the battery system, determine a heating value of the battery system according to the state of charge and the charge/discharge rate, and control the cooling water control apparatus to control the supply of the cooling water according to the heating value.
Absstract of: EP4597717A1
Provided is a battery pack. The battery pack includes at least two battery modules (100). Each battery module (100) includes a housing (1) and multiple battery cells (2) disposed in the housing (1). Multiple pressure relief holes (122) are disposed on a side surface of the housing (1). The multiple pressure relief holes (122) are in a one-to-one correspondence with the multiple cells (2). One end of each battery cell (2) has an explosion-proof hole. The explosion-proof hole communicates with a corresponding pressure relief hole (122). Two adjacent battery modules (100) form a module assembly. In the same module assembly, two housings (1) are spaced apart to form a pressure relief channel (300), and pressure relief holes (122) on the two housings (1) are facing the pressure relief channel (300).
Absstract of: EP4596113A1
Disclosed is a slot die coater for improving profiles of edges of an electrode active material layer.A slot die coater according to the present disclosure includes: an upper die block, a middle die block, and a lower die block; an upper shim provided between the upper die block and the middle die block to form an upper slot; and a lower shim provided between the middle die block and the lower die block to form a lower slot, wherein a first coating liquid is discharged through an upper outlet communicating with the upper slot and applied onto a base material, and a second coating liquid is discharged through a lower outlet communicating with the lower slot and applied onto the base material, wherein the upper shim includes at least one first opening, wherein the lower shim includes a second opening at a position corresponding to the first opening, and wherein the second opening includes a section having a smaller width than the first opening at a front end adjacent to the lower outlet.
Absstract of: EP4597732A1
A busbar module (5) includes a case (6) that is assembled to a battery module (2), and a flexible substrate (7) that is held in the case (6). A main body (71) of the flexible substrate (7) includes a trunk portion (711), and a branch portion (712) branched from the trunk portion (711). Meanwhile, the case (6) includes a trunk holding portion (61), a branch holding portion (62) that is positioned closer to the battery module (2) side than the trunk holding portion (61), and a connecting wall (63) that connects the trunk holding portion (61) and the branch holding portion (62). The trunk holding portion (61), the branch holding portion (62), and the connecting wall (63) form a stepped portion. Further, the branch portion (712) includes a curved portion (7122) that curves smoothly in a connecting portion with the trunk portion (711). A holding portion (64) that holds the main body (71) in a state in which a curved shape of the curved portion (7122) is maintained is formed in the case (6).
Absstract of: GB2637678A
The invention relates to a directly cooled battery module (100) comprising at least one module casing (40) and a plurality of battery cells (10) arranged within the module casing (40). The module casing (40) encloses the plurality of battery cells (10) at least in some regions, and the battery cells (10) has a vertical axis (20) and first and second end faces (16, 18), which are mutually spaced in the direction of the vertical axis (20), and are arranged successively in the form of a cell packet (38) in a stacking direction (26) which is transverse to the vertical axis (20). The battery module also comprises a fluid supply device (50) with at least one inlet opening (54), which conducts a cooling liquid (60) to the battery cells (10) when operated as intended, and at least one outlet opening (56) for freely discharging the cooling liquid (60) out of the module casing (40) and/or the cell packet (38) and into the surroundings of the module casing (40), in particular into a battery housing (210) when arranged in a battery housing (210) as intended. The invention additionally relates to a battery (200) comprising at least one directly cooled battery module (100).
Absstract of: EP4597788A1
This application provides a battery pack. The battery pack includes a battery unit, a switch unit, a power balancing circuit, and a sampling circuit. The battery unit includes N electrochemical cells that are connected in series, and the switch unit includes N+1 switches, where N is an integer greater than or equal to 2. First ends of any two adjacent switches in the N+1 switches are respectively connected to two ends of one of the N electrochemical cells, and second ends of the any two adjacent switches are respectively connected to a first end and a second end of the switch unit. Both the sampling circuit and the power balancing circuit are connected to the first end and the second end of the switch unit. The sampling circuit is configured to obtain a power parameter of each of the N electrochemical cells by turning on or off the N+1 switches. The power balancing circuit is configured to perform power balancing on at least one electrochemical cell in the N electrochemical cells based on the N power parameters obtained by the sampling circuit, so that a power difference between the N electrochemical cells is reduced after the at least one electrochemical cell is charged or discharged, an inconsistency between the electrochemical cells is reduced, and a service life of the battery pack is improved.
Absstract of: EP4597612A1
A positive electrode active material includes: (a) a first positive electrode active material, including a layered lithium nickel-manganese-based composite oxide, in a form of single particles; and (b) a second positive electrode active material, including a lithium-manganese-rich composite oxide, in which a molar ratio of lithium to a total metal content of the lithium-manganese-rich composite excluding lithium is about 1.1 to about 3 and a manganese content based on 100 mol% of the total metal content of the lithium-manganese-rich composite excluding lithium is greater than or equal to about 60 mol%, the second positive electrode active material being in a form of single particles. Also disclosed are a positive electrode and a rechargeable lithium battery, each using the positive electrode active material.
Absstract of: EP4597611A1
A positive electrode active material includes: (a) a first positive electrode active material, including a first layered lithium nickel-manganese-based composite oxide, in a form of secondary particles in which a plurality of primary particles are agglomerated; (b) a second positive electrode active material, including a second layered lithium nickel-manganese-based composite oxide, the second positive electrode active material having a smaller average particle diameter (D<sub>50</sub>) than the first positive electrode active material, and the second positive electrode active material being in a form of single particles; and (c) a third positive electrode active material, including a lithium-manganese-rich composite oxide, in which a molar ratio of lithium to a total metal content of the lithium-manganese-rich composite oxide excluding lithium is about 1.1 to about 3 and a manganese content based on 100 mol% of the total metal content of the lithium-manganese-rich composite oxide excluding lithium is greater than or equal to about 60 mol%, the third positive electrode active material being in a form of single particles. Also disclosed are a positive electrode and a rechargeable lithium battery, each using the positive electrode active material
Nº publicación: EP4596500A2 06/08/2025
Applicant:
SK ON CO LTD [KR]
SK On Co., Ltd
Absstract of: EP4596500A2
A cathode active material for a lithium secondary battery according to embodiments of the present disclosure includes a lithium-transition metal oxide including a transition metal including nickel (Ni). A molar ratio of lithium to elements except for lithium and oxygen in the lithium-transition metal oxide is 1.04 to 1.08, and a molar fraction of cobalt (Co) in the transition metal is 0.05 or less. A lithium secondary battery including the cathode active material for a lithium secondary battery and having improved structural stability and charge/discharge efficiency is provided.
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