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Negative electrode active material for secondary battery, method for manufacturing same, and secondary battery using same

NºPublicación:  GB2641622A 10/12/2025
Solicitante: 
AEKYUNG CHEMICAL CO LTD [KR]
Aekyung Chemical Co., Ltd
GB_2641622_PA

Resumen de: GB2641622A

The present disclosure relates to a negative electrode active material for a secondary battery, a method for manufacturing same, and a secondary battery using same, the negative electrode active material comprising a carbide carbonized by heat-treating a mixture comprising starch and isocyanate in an inert gas atmosphere. More specifically, the present invention relates to a negative electrode active material for a secondary battery, a method for manufacturing same, and a secondary battery using same, the negative electrode active material having a low specific surface area and improving the initial charging/discharging capacity of a secondary battery.

BATTERY

NºPublicación:  EP4661110A2 10/12/2025
Solicitante: 
ZHUHAI COSMX BATTERY CO LTD [CN]
Zhuhai CosMX Battery Co., Ltd
EP_4661110_A2

Resumen de: EP4661110A2

Disclosed is a battery including a positive electrode plate, a negative electrode plate, and an electrolyte solution, the negative electrode plate includes a negative electrode current collector including a copper foil and a negative electrode active material layer including a negative electrode active material which including a silicon-based active material, the electrolyte solution includes lithium bis(trifluoromethanesulfonyl)imide; and the battery satisfies following relationship: B - 10A - C/10 + 3 ≥ 0; A is a grain size of copper foil, in a unit of µm; B is a mess percentage of lithium bis(trifluoromethanesulfonyl)imide in the electrolyte solution, in a unit of wt%; C is a mass percentage of the silicon-based active material in the negative electrode active material, in a unit of wt%, and C ≤ 50. The battery may significantly alleviate silicon negative electrode expansion while enhance the kinetic performance and cycling stability of the battery under room-temperature.

ENERGY STORAGE SYSTEM

NºPublicación:  EP4661174A1 10/12/2025
Solicitante: 
SK ON CO LTD [KR]
SK On Co., Ltd
EP_4661174_PA

Resumen de: EP4661174A1

An energy storage system may include: a cabinet including a mounting portion capable of mounting a plurality of battery modules thereon and a door member capable of being opened and closed; and a venting portion emitting gas occurring in an internal space of the cabinet, wherein the venting portion includes at least one inlet communicating with the internal space and allowing the gas to flow into the inlet; and at least one outlet disposed in an outer surface of the cabinet and communicating with the inlet.

SEPARATOR FOR RECHARGEABLE LITHIUM BATTERY, METHOD OF MANUFACTURING THE SAME, AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME

NºPublicación:  EP4661189A1 10/12/2025
Solicitante: 
SAMSUNG SDI CO LTD [KR]
SAMSUNG SDI CO., LTD
EP_4661189_PA

Resumen de: EP4661189A1

Examples of the present disclosure include a separator for a rechargeable lithium battery, a method of manufacturing the separator, an electrode assembly for a rechargeable lithium battery including the separator, and a rechargeable lithium battery including the separator. Examples of the present disclosure include a separator for a rechargeable lithium battery, the separator including a first area, and a second area located at each of both ends of the first area, wherein :Thickness increase rate of second area > MD heat shrinkage rate of second area, and :Thickness increase rate of second area > TD heat shrinkage rate of second area.

MONOMER FOR ELECTROLYTE, ELECTROLYTE FOR SECONDARY BATTERY INCLUDING THE SAME, METHOD OF PREPARING THE SAME AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME

NºPublicación:  EP4661137A1 10/12/2025
Solicitante: 
SK INNOVATION CO LTD [KR]
SK ON CO LTD [KR]
SK Innovation Co., Ltd,
SK On Co., Ltd
EP_4661137_PA

Resumen de: EP4661137A1

A monomer for an electrolyte according to the embodiments of the present disclosure may include a compound represented by Formula 1. A lithium secondary battery according to the embodiments of the present disclosure includes a cathode, an anode, and an electrolyte, wherein the electrolyte may include a polymer of the compound represented by Formula 1.wherein X<sub>1</sub>, X<sub>2</sub> and X<sub>3</sub> are each independently a halogen element,R<sub>1</sub>, R<sub>2</sub> and R<sub>3</sub> are each independently hydrogen, a halogen element, a substituted or unsubstituted C1 to C6 alkyl group, or a polymerizable group, andat least one of R<sub>1</sub>, R<sub>2</sub> or R<sub>3</sub> is a polymerizable group.

HIGH-NICKEL POSITIVE ELECTRODE MATERIAL, AND PREPARATION METHOD THEREFOR AND USE THEREOF

NºPublicación:  EP4661109A1 10/12/2025
Solicitante: 
NINGBO RONBAY NEW ENERGY TECH CO LTD [CN]
Ningbo Ronbay New Energy Technology Co., Ltd
EP_4661109_PA

Resumen de: EP4661109A1

Provided in the present application are a high-nickel positive electrode material, and a preparation method and a use thereof. The high-nickel positive electrode material of the present application is a secondary particle formed by aggregation of primary crystal grains, and a grain boundary is included between adjacent primary crystal grains. A mass ratio of cobalt element to nickel element at the grain boundary in a surface layer of the secondary particle is A, the mass ratio of cobalt element to nickel element at the grain boundary in an interior of the secondary particle is B, and the mass ratio of cobalt element to nickel element of the primary crystal grains in the surface layer of the secondary particle is C, where A is greater than B and A is greater than C. The high-nickel positive electrode material of the present application has a structure of cobalt-rich grain boundary in a surface layer of the secondary particle, which may enhance the structural stability of the material and reduce side reactions with the electrolyte, thereby enabling the battery to have excellent discharge capacity, Coulombic efficiency and capacity retention rate.

COOLED BUSBAR AND CHARGING SYSTEM

NºPublicación:  EP4659994A1 10/12/2025
Solicitante: 
NEXANS [FR]
Nexans
EP_4659994_PA

Resumen de: EP4659994A1

Es wird eine elektrische Stromschiene (100) vorgeschlagen, die als Hohlprofil (101) ausgebildet ist, dessen Hohlraum (104) von einem Kühlmittel durchströmt ist. Die Stromschiene weist einen Einlassanschluss und einen Auslassanschluss auf, wobei der Einlassanschluss so ausgebildet ist, um das Einströmen eines Kühlmittels in den Hohlraum zu gestatten. Der Auslassanschluss ist so ausgebildet, um das Ausströmen des Kühlmittels aus dem Hohlraum zu ermöglichen. Mit den Enden (106) der Stromschiene bzw. des Hohlprofils sind Kontaktstücke (107) stoffschlüssig und elektrisch leitend verbunden sind und verschließen den Hohlraum dicht. Weiterhin wird ein Ladesystem mit einer solchen Stromschiene vorgeschlagen.

LITHIUM SECONDARY BATTERY

NºPublicación:  EP4661115A1 10/12/2025
Solicitante: 
LG ENERGY SOLUTION LTD [KR]
LG Energy Solution, Ltd
EP_4661115_A1

Resumen de: EP4661115A1

The present invention provides a lithium secondary battery including a positive electrode, a negative electrode, a separator placed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the positive electrode includes a positive electrode active material and a first additive, the non-aqueous electrolyte includes a lithium salt, an organic solvent, and a second additive, the first additive includes at least one selected from the group consisting of compounds represented by Formula 1-1 and Formula 1-2, and the second additive includes a cyclic sulfur oxide-based compound. Formula 1-1 and Formula 1-2 above are as described in the specification.

BATTERY CELL, BATTERY, ELECTRIC DEVICE, AND PROCESSING METHOD FOR BATTERY CELL

NºPublicación:  EP4661149A1 10/12/2025
Solicitante: 
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD [CN]
Contemporary Amperex Technology Co., Limited
EP_4661149_PA

Resumen de: EP4661149A1

The present application is applicable to the technical field of batteries (100), and provides a battery cell (10), a battery (100), an electric device, and a processing method for a battery cell (10). The battery cell (10) comprises an electrode assembly (11) and active structures (12). The electrode assembly (11) comprises a positive electrode sheet (111) and a negative electrode sheet (112), wherein the positive electrode sheet (111) comprises first straight segments (1111) and first bent segments (1112), and the negative electrode sheet (112) comprises second straight segments (1121) and second bent segments (1122), the first straight segments (1111) and the second straight segments (1121) are alternately stacked to form straight portions (1101), and the first bent segments (1112) and the second bent segments (1122) are alternately stacked to form corner portions (1102). At least some of the active structures (12) are provided between the first bent segments (1112) and the second bent segments (1122) adjacent to the inner sides of the first bent segments (1112). In this way, the problem of ion precipitation at the corner portions can be solved.

METHOD AND APPARATUS FOR CHARGING BATTERY

NºPublicación:  EP4661242A1 10/12/2025
Solicitante: 
LG ENERGY SOLUTION LTD [KR]
LG Energy Solution, Ltd
EP_4661242_PA

Resumen de: EP4661242A1

A battery charging method according to an embodiment of the present disclosure is a method of charging a battery by dividing a charging section into a plurality of charging sections, and includes a first discharging step of applying a first discharging pulse between an n-1th (n is a natural number greater than or equal to 2) charging section and an nth charging section; and a second discharging step of applying a second discharging pulse between the nth charging section and an n+1th charging section. Here, a discharging rate of the second discharging pulse is less than a discharging rate of the first discharging pulse.

BUSBAR ASSEMBLY AND BATTERY PACK INCLUDING SAME

NºPublicación:  EP4661202A1 10/12/2025
Solicitante: 
LG ENERGY SOLUTION LTD [KR]
LG Energy Solution, Ltd
EP_4661202_PA

Resumen de: EP4661202A1

A busbar assembly according to an embodiment of the present disclosure includes: a busbar that guides an electrical connection of a battery module inside a battery pack; a fire resistant silicone member in which a recessed part is formed on a lower surface; and a cover in which an opening part is formed on a lower part. The fire resistant silicone member is fitted into the inside of the cover through the opening part, and busbar is mounted in the recessed part of the fire resistant silicone member.

POWER SUPPLY DEVICE AND METHOD FOR MANUFACTURING POWER SUPPLY DEVICE

NºPublicación:  EP4661182A1 10/12/2025
Solicitante: 
PANASONIC ENERGY CO LTD [JP]
Panasonic Energy Co., Ltd
EP_4661182_PA

Resumen de: EP4661182A1

A split battery holder is securely bonded together while retaining a plurality of rechargeable battery cells. The power source apparatus 100 holds a plurality of rechargeable battery cells 1 in a first battery holder 2A and a second battery holder 2B joined together through a bonding layer 4. The first battery holder 2A is provided with a plurality of first holder cylindrical sections 21, a first mating surface 22, and a plurality of side wall extensions 23. Cell exposed regions 24 are established between adjacent side wall extensions 23, and filling grooves 41, which hold adhesive 40, are formed in regions surrounded by rechargeable battery cells 1 and side wall extensions 23. The second battery holder 2B is provided with a plurality of second holder cylindrical sections 31, a second mating surface 32, and protruding posts 33. The protruding posts 33 insert into filling grooves 41 but are configured not to make contact with the first mating surface 22 or the side wall extensions 23. When the first battery holder 2A and the second battery holder 2B are connected, protruding posts 33 are inserted in the filling grooves 41 and are bonded and attached to the first battery holder 2A and rechargeable battery cells 1 via the bonding layer 4.

SI-C COMPOSITE PARTICLES, METHOD FOR PRODUCING SAME, AND USE OF SAME

NºPublicación:  EP4660133A1 10/12/2025
Solicitante: 
GROUP14 TECHNOLOGIES INC [US]
Group14 Technologies, Inc
EP_4660133_A1

Resumen de: EP4660133A1

Provided are: Si-C composite particles containing a carbon material and silicon, wherein the Si-C composite particles have a true density by dry density measurement using helium gas of 2.20 g/cm3 or less, a peak is present at 450-495 cm-1 in a Raman spectrum of the Si-C composite particles, and the change in volume calculated by the following formula between before and after stirring in water is 10% or less; a negative electrode mixture layer for a lithium ion battery; and a lithium ion battery. Change in volume (%) = {1 - (volume (cm3) of spheres the diameter of which is the 50% particle size (Dn50) in a number-based cumulative particle size distribution of the Si-C composite particles after stirring in water)/(volume (cm3) of spheres the diameter of which is the 50% particle size (Dn50) in a number-based cumulative particle size distribution of the Si-C composite particles before stirring in water)}×100

DRYING METHOD FOR SECONDARY BATTERY COATING FILM, AND COATING DEVICE FOR SECONDARY BATTERY COATING FILM

NºPublicación:  EP4661086A1 10/12/2025
Solicitante: 
O M C CO LTD [JP]
O.M.C. Co., Ltd
EP_4661086_PA

Resumen de: EP4661086A1

The present invention is a drying method for a coating film. A metal foil current collector 1 having a long strip shape and being conveyed in one direction is intermittently or continuously coated with a coating liquid 2 as an active material mixture for a secondary battery, whereby a coating film 3 is formed on the current collector 1. The metal foil current collector 1 is sent to a drying step, and the metal foil current collector 1 is heated such that the coating film 3 is dried in the drying step. Before or during the drying step for the coating film 3, the coating film 3 is irradiated with a laser beam L such that a hole 3h is formed in the coating film 3.

THERMAL MANAGEMENT SYSTEM FOR EFFICIENT HEAT DISSIPATION

NºPublicación:  EP4659307A1 10/12/2025
Solicitante: 
VAZIRANI AUTOMOTIVE PVT LTD [IN]
Vazirani Automotive Pvt. Ltd
US_2025353348_PA

Resumen de: US2025353348A1

The present disclosure relates to a thermal management system for a battery. The system comprises a solid component and a liquid conveying component for efficient heat dissipation in a battery comprising plurality of cells enclosed in a casing. The solid component is a powder mixture comprising organic and inorganic compounds mixed in optimum ratio for exchanging heat with the plurality of cells. The liquid cooling component comprises of plurality of liquid conveying component arranged for the flowing liquid coolant to exchange heat with the solid component and conveying the heat out of the battery.

ELECTROLYTE SOLUTION, BATTERY CELL COMPRISING SAME, BATTERY, AND ELECTRIC DEVICE

NºPublicación:  EP4661138A1 10/12/2025
Solicitante: 
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD [CN]
Contemporary Amperex Technology Co., Limited
EP_4661138_PA

Resumen de: EP4661138A1

Provided in the embodiments of the present application are an electrolyte solution, a battery cell comprising same, a battery and an electric device. The electrolyte solution comprises: a first additive, which comprises an isocyanate compound as represented by formula (I), wherein R comprises at least one of a hydrogen atom, a halogen atom, a nitrogen-containing group, an oxygen-containing group, a sulfur-containing group, a phosphorus-containing group, an alkyl group, a cycloalkyl group, a phenyl group, an aryl group, a halophenyl group, and an alkyl, cycloalkyl, phenyl, aryl or halophenyl group containing at least one isocyanate radical, and the value of n is any natural number of 0-8; and a lithium salt, which comprises lithium difluorosulfonimide, the weight content of the lithium difluorosulfonimide in the lithium salt being 30%-85% based on the total weight of the lithium salt. A battery comprising the electrolyte solution has both improved cycle performance and prolonged storage life.

System for deicing black ice on road surface using invisible light based on AI

NºPublicación:  GB2641589A 10/12/2025
Solicitante: 
SRD KOREA CO LTD [KR]
SRD Korea Co., Ltd
GB_2641589_PA

Resumen de: GB2641589A

The system for de-icing black ice includes a plurality of laser scanners 100 that are arranged at intervals along a road, each laser scanner including a light source unit, a non-contact temperature sensor, and a control unit 200 that controls an operation of radiating the laser to the area in charge, a weather sensor that measures a temperature and humidity, and an integrated controller that communicates with the plurality of laser scanners. The integrated controller determines whether the laser is radiated to the road surface based on at least one of the measured temperature and humidity, and when the laser radiation is determined, generates a control signal to activate at least one laser scanner, and the control unit determines a heating area, and generates a pulse signal to turn on/off a light source unit so that the laser is radiated in accordance with a shape and range of the heating area.

POWER STORAGE DEVICE

NºPublicación:  EP4661238A1 10/12/2025
Solicitante: 
SONY SEMICONDUCTOR SOLUTIONS CORP [JP]
Sony Semiconductor Solutions Corporation
EP_4661238_PA

Resumen de: EP4661238A1

Electric power is recovered from noise components generated by electrostatic induction.A power storage device includes: a first metal element electrically floating from a ground; a second metal element that is electrostatically coupled to the first metal element to cause charge bias in the first metal element; and a power storage unit that is connected to the first metal element and the second metal element, and stores a potential difference generated between the first metal element and the second metal element.

AIR AND MOISTURE STABLE HIGH-CAPACITY POSITIVE ELECTRODE MATERIALS FOR SODIUM-ION BATTERY

NºPublicación:  EP4659290A1 10/12/2025
Solicitante: 
COUNCIL SCIENT IND RES [IN]
Council Of Scientific & Industrial Research
KR_20250144408_PA

Resumen de: CN120642057A

The present invention relates to a sodium ion battery comprising a positive electrode composition having improved battery performance and moisture and air stability. The positive electrode composition has the general formula NaxAzNiiMyMnjTikSbfO2, where A is an alkali metal or alkaline earth metal selected from Ca, Li, M is a divalent element or trivalent element selected from Fe, Mg, Zn, Cu, Al, Co, and Ni is a divalent element, Mn, Ti are tetravalent elements, and Sb is a pentavalent element/trivalent element, where (i + j + k + f + y = 1), 0.7 < = x < = 1, 0 < = z < = 0.2, 0.1 < = i < = 0.6, 0 < = y < = 0.5, 0.1 < = j < = 0.5, 0.05 < = k < = 0.4, and 0 < = f < = 0.2. The invention is suitable for energy storage application.

SEALING FILM, METAL TERMINAL, BATTERY, AND DEVICE

NºPublicación:  EP4661172A1 10/12/2025
Solicitante: 
ZACROS CORP [JP]
ZACROS Corporation
EP_4661172_PA

Resumen de: EP4661172A1

The present invention relates to a sealing film for sealing between an electrode lead wire and a housing container, in which the sealing film has high adhesive strength, excellent heat resistance and dimensional stability, and high durability against an electrolyte; a metal terminal; a battery; and a device. More specifically, the present invention relates to a sealing film for sealing between an electrode lead wire electrically connected to a battery main body and a housing container housing the battery main body, in which the sealing film has an adhesive layer containing an acid-modified polypropylene resin at a surface on a side to be bonded to the electrode lead wire, the adhesive layer has a thickness of 30 um or less, and the adhesive layer has an elastic modulus of 1000 MPa or more and does not have a solidification point peak in a range of 90 to 110°C in measurement with a differential scanning calorimeter (DSC); a metal terminal; a battery; and a device.

BATTERY PACK COVER PLATE, BATTERY PACK AND VEHICLE

NºPublicación:  EP4661181A1 10/12/2025
Solicitante: 
BYD CO LTD [CN]
BYD Company Limited
EP_4661181_PA

Resumen de: EP4661181A1

The present disclosure discloses a battery pack cover, a battery pack, and a vehicle. The battery pack cover (100) includes: a first substrate (10), where a thickness of the first substrate (10) is a<sub>1</sub>, in mm, and a thermal conductivity of the first substrate (10) is b<sub>1</sub>, in W/(m·K); and a second substrate (20), where the second substrate (20) is located on a side of the first substrate (10), a thickness of the second substrate (20) is a<sub>2</sub>, in mm, and a thermal conductivity of the second substrate (20) is b<sub>2</sub>, in W/(m·K), where the first substrate (10) and the second substrate (20) satisfy the following condition: 6.67 < a<sub>1</sub>/b<sub>1</sub> + a<sub>2</sub>/b<sub>2</sub> < 100.04.

BATTERY ASSEMBLY AND ELECTRIC DEVICE

NºPublicación:  EP4661134A1 10/12/2025
Solicitante: 
BYD CO LTD [CN]
BYD Company Limited
EP_4661134_PA

Resumen de: EP4661134A1

The present application provides a battery assembly and an electric device. The battery assembly comprises first batteries and second batteries; the first batteries expand during charging and contract during discharging; and the second batteries contract during charging and expand during discharging. The battery assembly can effectively solve the problem of capacity attenuation caused by excessive volume change or excessive pressure change of batteries during charging and discharging, and can be used for providing an electric device having long battery life and continuous and stable battery life.

SILICON-CARBON NEGATIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, NEGATIVE ELECTRODE SHEET, AND ELECTROCHEMICAL DEVICE

NºPublicación:  EP4661112A1 10/12/2025
Solicitante: 
BYD CO LTD [CN]
BYD Company Limited
EP_4661112_PA

Resumen de: EP4661112A1

Silicon-carbon negative electrode material and preparation method therefor, negative electrode sheet, and electrochemical deviceThis application relates to the technical field of battery negative electrode materials, and specifically to a silicon-carbon negative electrode material and a preparation method therefor, a negative electrode plate, and an electrochemical apparatus. The silicon-carbon negative electrode material includes carbon and modified particles dispersed in the carbon, the modified particles include silicon carbide and silicon; and the silicon is at least partially connected to the carbon through the silicon carbide, and a mass ratio of the silicon carbide to the silicon is 1:1-50.

POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, POSITIVE ELECTRODE SHEET AND SECONDARY BATTERY

NºPublicación:  EP4661099A1 10/12/2025
Solicitante: 
TIANJIN B&M SCIENCE AND TECH CO LTD [CN]
Tianjin B&M Science And Technology Co., Ltd
EP_4661099_PA

Resumen de: EP4661099A1

The present application relates to a cathode material and a preparation method therefor, a cathode plate and a secondary battery. The cathode material includes an inner core and a coating layer coated on at least part of a surface of the inner core, wherein the inner core includes a material with a chemical formula LiNiaCobMncQdO2, where Q element includes at least one of Zr and Al, 0.89≤a≤0.98, 0≤b≤0.06, 0≤c<0.11, d>0, and a+b+c+d=1, and the coating layer includes a material with a chemical formula LimConX(1-n)O2, where X element includes at least one of Al, W, Ti, B and La, 0

SECONDARY BATTERY

Nº publicación: EP4661128A1 10/12/2025

Solicitante:

SAMSUNG SDI CO LTD [KR]
SAMSUNG SDI CO., LTD

EP_4661128_PA

Resumen de: EP4661128A1

A secondary battery includes an electrode assembly including a first electrode plate, a second electrode plate having a polarity different from the first electrode plate, and a separator between the first electrode plate and the second electrode plate, a case configured to accommodate the electrode assembly, and an adhesive member between the electrode assembly and the case, the adhesive member including a porous film.

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