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ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE

Resumen de: EP4597737A1

The present application relates to the technical field of batteries, and provides an electrode assembly, a battery cell, a battery, and an electric device. The electrode assembly comprises two electrode sheets having opposite polarities and a separator used for separating the two electrode sheets, the two electrode sheets and the separator being wound in a winding direction to form a main body and two tabs. The tabs and the main body are arranged in a first direction; each tab comprises a plurality of tab portions arranged at intervals in the winding direction; the tab portions are bent relative to the first direction; at least parts of the plurality of tab portions are stacked in the first direction; and a protrusion is formed on at least one side of each tab portion in the thickness direction thereof. By providing the protrusions on the tab portions, the thickness of the plurality of tab portions stacked together can be increased after the tab portions are bent, and the problem of a small local thickness of the tab can be alleviated, so that the risk that the tab is welded through in the subsequent assembly process is reduced, and reduction of damage to the electrode assembly is facilitated, improving the production quality of the battery cell comprising the electrode assembly.

NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Resumen de: EP4597680A1

In the present invention, a non-aqueous electrolyte secondary battery has a wound electrode body comprising a negative electrode (12) in which a negative electrode composite layer (32) is formed on a negative electrode core (30). The negative electrode (12) has a non-facing part (12a) on the side of the electrode body on the inner end side in the winding direction, the non-facing part (12a) not facing the positive electrode across the separator. The non-facing part (12a) has a composite material non-facing part (12c), in which the negative electrode composition layer (32) is formed on at least one surface of the negative electrode core (30). In the composite material non-facing part (12c), the winding-direction length of a negative electrode composite layer (32a) formed on an inner circumference surface (30a) of the negative electrode core (30) is 0.3 turns or more along the winding direction of the composite material non-facing part (12c), and the winding-direction length of a negative electrode composite layer (32b) formed on an outer circumference surface (30b) of the negative electrode core (30) does not exceed 2/3 of the winding-direction length of the negative electrode composite layer (32a) formed on the inner circumference surface (30a) of the negative electrode core (30).

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Resumen de: EP4597662A1

With respect to a nonaqueous electrolyte secondary battery according to the present disclosure, the positive electrode contains a lithium-containing composite oxide and a sulfonic acid compound that is present on the particle surfaces of the lithium-containing composite oxide; the sulfonic acid compound is represented by formula (I); the negative electrode comprises a negative electrode core body, a first negative electrode mixture layer that is arranged on the surface of the core body, and a second negative electrode mixture layer that is arranged on the surface of the first negative electrode mixture layer; the thickness T1 of the first negative electrode mixture layer and the thickness T2 of the second negative electrode mixture layer satisfy the relational expression 0.1 ≤ T1/(T1 + T2) ≤ 0.9; the first negative electrode mixture layer and the second negative electrode mixture layer each contain a negative electrode active material and a binder; the binder content C1 in the first negative electrode mixture layer and the binder content C2 in the second negative electrode mixture layer satisfy the relational expression C1 > C2. (In the formula, A represents a group 1 element or a group 2 element; R represents a hydrocarbon group; and n is 1 or 2.)

BATTERY PACK AND METHOD FOR MANUFACTURING SAME

Resumen de: EP4597704A1

A secondary battery cell can be fixed to a battery holder with high reliability. Battery pack 100 includes a plurality of secondary battery cells 1 and battery holder 20 including a plurality of storage tubes 22 that respectively hold the plurality of secondary battery cells 1. Battery holder 20 is divided into at least first divided holder 21A and second divided holder 21B in the length direction of secondary battery cell 1, and first storage tube 22A of first divided holder 21A and second storage tube 22B of second divided holder 21B are joined to form a cell storage space for storing secondary battery cell 1. At least a part of second storage tube 22B has recess 24 formed on at least a part of the inner surface thereof, and adhesive 50 is interposed between recess 24 of storage tube 22 and secondary battery cell 1.

BINDER COMPOSITION FOR NONAQUEOUS SECONDARY BATTERY ELECTRODES, SLURRY COMPOSITION FOR NONAQUEOUS SECONDARY BATTERY ELECTRODES, ELECTRODE FOR NONAQUEOUS SECONDARY BATTERIES, AND NONAQUEOUS SECONDARY BATTERY

Resumen de: EP4597634A1

A binder composition for a non-aqueous secondary battery electrode contains a polymer X that includes an acidic group-containing monomer unit in a proportion of not less than 3 mass% and not more than 20 mass% and a repeating unit derived from an unsaturated monomer A in a proportion of not less than 5 mass% and less than 50 mass%. The unsaturated monomer A has a solubility in water of not less than 1 g/100 mL and not more than 15 g/100 mL and has a glass-transition temperature of 40°C or lower.

ELECTRODE MATERIAL WINDING APPARATUS

Resumen de: EP4597651A1

The present specification relates to an embodiment of an electrode material winding apparatus, in which an electrode material is processed so that an electrode tab is not disposed in an impregnation region into which an electrolyte can be injected, and the electrode material is wound so that the electrode tab is arranged only in a specific region excluding the impregnation region, thereby winding the electrode material such that the electrolyte is injected through the impregnation region.

POWER SUPPLY DEVICE RECYCLING METHOD

Resumen de: EP4597681A1

A method of easily recycling power supply devices is provided. Each power supply device includes battery blocks (10) and a circuit board (30) accommodated in a housing (20), each of the battery blocks (10) including secondary battery cells. The method includes: measuring resistance values based on current and voltage values of the devices before and after starting one of charging and discharging of power supply devices (100) for a predetermined time not longer than 10 seconds and based on current and voltage values after finishing the one of charging and discharging of the devices; grouping one or more power supply devices (10), the one or more power supply devices each having a difference between the resistance values which is within a predetermined range; taking out the battery blocks (10) accommodated in the housing (20) by disassembling the devices; and reproducing, according to a result of the grouping, a power supply device: by constituting a new power supply device (100') by accommodating the battery blocks in a new housing; or by reproducing a power supply device by combining a new battery block with a separated housing (20) and a separated circuit board (30).

POSITIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Resumen de: EP4597633A1

A positive electrode for a nonaqueous electrolyte secondary battery includes a positive electrode mixture containing a positive electrode active material, and a binder having a polymer structure derived from vinylidene fluoride. An ATR-IR spectrum of the positive electrode mixture has an α peak belonging to an α-type crystal in the polymer structure in a wavelength region of 760 to 764 cm<-1>, and a β peak belonging to a β-type crystal in the polymer structure in a wavelength region of 838 to 842 cm<-1>. A maximum absorption intensity H(α) of the α peak and a maximum absorption intensity H(β) of the β peak satisfy 0.2 ≤ H(α)/H(β) ≤ 5. With this configuration, in the case of using a ferroelectric, it is possible to improve the capacity retention rate while maintaining the capacity of the nonaqueous electrolyte secondary battery.

POSITIVE ELECTRODE FOR SECONDARY BATTERY, PRODUCTION METHOD THEREFOR, AND SECONDARY BATTERY

Resumen de: EP4597632A1

A positive electrode 13 for secondary battery of the present disclosure includes a positive electrode current collector 11 and a positive electrode active material layer 12 supported on the positive electrode current collector 11, where the positive electrode active material layer 12 includes a positive electrode active material and polyvinyl alcohol modified with a phosphorus compound. A method for manufacturing the positive electrode 13 for secondary battery includes: preparing a polymer solution including polyvinyl alcohol, a phosphorus compound, and a solvent; preparing a positive electrode slurry including the polymer solution and the positive electrode active material; and applying the positive electrode slurry to the positive electrode current collector 11 to form the positive electrode active material layer.

BATTERY SYSTEM

Resumen de: EP4597700A1

The present invention suppresses a temperature rise of a battery cell due to a bus bar plate connected to first and second lead plates. In battery system 1 in which a plurality of battery cells 4A included in battery block 4 are connected in series as well as in parallel by connecting the end-face electrodes of battery cells 4A with first lead plate 7A and second lead plate 7B that are connected by bus bar plates 3, a temperature rise of a specific battery cell 4A caused by bus bar plates 3 is suppressed by ensuring cooling gap 5 between bus bar plates 3 and battery block 4, and enabling the air in cooling gap 5 to rise quickly when the temperature of bus bar plate 3 rises due to the Joule heating of the load current.

ELECTROLYTE FOR SODIUM SECONDARY BATTERY, SODIUM SECONDARY BATTERY, AND ELECTRICAL DEVICE

Resumen de: 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.

POSITIVE ELECTRODE ACTIVE MATERIAL AND PREPARATION METHOD THEREFOR, AND POSITIVE ELECTRODE SHEET, SECONDARY BATTERY AND ELECTRIC DEVICE COMPRISING POSITIVE ELECTRODE ACTIVE MATERIAL

Resumen de: 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.

ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, ELECTRICAL DEVICE, AND SEPARATOR MANUFACTURING METHOD

Resumen de: 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.

CURRENT COLLECTORS FOR BATTERY ELECTRODES

Resumen de: WO2024073512A2

A device can include a battery electrode that comprises a substrate having one or more polymeric materials and a layer disposed on the substrate. The layer can include one or more conductive materials, have a thickness no greater than 12 micrometers, and have a porosity of at least 5% by volume. Additionally, an electrode layer including a seed layer can comprise a number of fused nanoparticles. The electrode layer can also include a lithium metal layer disposed on the number of fused nanoparticles. The electrode layer can be formed by producing, on a polymeric current collector layer, a seed layer that includes nanoparticles. A formulation to form the seed layer can include nanoparticles having ligands and then removing the ligands using one or more thermal and/or one or more chemical treatment processes. The seed layer can be electrically conductive, acting as the current collector when disposed on a polymeric substrate.

PRODUCTION METHOD FOR POSITIVE ELECTRODE ACTIVE MATERIAL

Resumen de: 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.

BUSBAR ASSEMBLY AND BATTERY PACK INCLUDING SAME

Resumen de: 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.

CARBON NANOTUBE DISPERSION AND PREPARATION METHOD THEREFOR

Resumen de: 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.

BATTERY PACK

Resumen de: 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).

GEL ELECTROLYTE COMPOSITION, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND ELECTRICAL DEVICE

Resumen de: 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.

PREPARATION METHOD FOR LITHIUM IRON PHOSPHATE MATERIAL WITH LOW IRON PHOSPHIDE CONTENT, AND USE OF LITHIUM IRON PHOSPHATE MATERIAL

Resumen de: 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.

ALKALI METAL OXIDE AND HYDROXIDE REDUCTION IN THE FILM BY EX-SITU SURFACE PASSIVATED LAYER

Resumen de: WO2024073001A1

Embodiments of the present disclosure include an anode for a battery including a substrate, a metal film disposed on the substrate, and a film stack disposed on the metal film. The film stack includes a lithium carbonate film and a lithium halide film disposed on the lithium carbonate. The lithium carbonate film is disposed on the metal film.

PRE-INTERCALATED TUNNEL-PHASE V2O5 AS A BATTERY CATHODE MATERIAL

Resumen de: AU2023354916A1

The subject invention pertains to design of strategies that enable the more effective utilization of active intercalation materials in the production of lithium ion batteries. Na- and K-ion intercalation "props" open the ID tunnel, reduces electrostatic repulsions between inserted Li-ions, and entirely modifies diffusion pathways, enabling orders of magnitude higher Li-ion diffusivities and accessing higher capacities. The subject invention provides materials and batteries comprising the materials produced via the methods disclosed within this application.

JOINING METHODS AND DEVICES MADE USING SAID METHODS

Resumen de: TW202425391A

Disclosed herein are joining methods (e.g., methods of forming a joined material) and devices comprising materials joined by said methods. For example, the disclosed subject matter related to methods of joining one or more metallized polymer current collectors together and/or to a tab. For example, the methods can comprise: placing one or more metallized polymer current collector proximate a tab, such that at least a portion of the metallized polymer current collector(s) overlaps with at least a portion of the tab in an overlap region; placing a conductive material proximate the overlap region; inducing flow of the conductive material such that the conductive material flows at least between the portion of the metallized polymer current collector(s) and the portion of the tab; and subsequently solidifying the conductive material, thereby forming a joint that joins the metallized polymer current collector(s) to the tab.

TERNARY SOLVENT ELECTROLYTES FOR HIGH VOLTAGE AND HIGH RATE LITHIUM BATTERIES

Resumen de: WO2024073410A1

Ternary electrolyte compositions are described, having a primary solvent, a mediating solvent, a diluent, and at least one lithium salt.

CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, MANUFACTURING METHOD THEREFOR, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Nº publicación: EP4597624A1 06/08/2025

Solicitante:

POSCO HOLDINGS INC [KR]
RES INST IND SCIENCE & TECH [KR]
POSCO Holdings Inc,
RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY

Resumen de: EP4597624A1

The present invention relates to a positive electrode active material for a lithium rechargeable battery, which is a lithium transition metal oxide containing nickel (Ni) and manganese (Mn), wherein the lithium transition metal oxide may be a single particle and has a crystal defect rate of less than 3%.