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BATTERY NEGATIVE ELECTRODE SHEET AND BATTERY

Resumen de: EP4794005A1

The present application provides a battery and a negative electrode sheet thereof. The battery negative electrode sheet includes a current collector and an active layer. The active layer is coated on the surface on at least one side of the current collector. The active layer has a plurality of grooves arranged in sequence along the length direction of the current collector. The grooves each extend along the width direction of the current collector. A plurality of regions in the active layer are separated by the plurality of grooves along the length direction of the current collector. Each region has a plurality of pores.

BATTERY PACK

Resumen de: EP4794075A1

A battery pack includes: a housing; multiple cells disposed in the housing; and a coupling portion configured to be coupled to an electrical device to transmit electrical energy. The coupling portion includes: a terminal assembly configured to be electrically coupled to the electrical device; and a support portion supporting at least the connection between the electrical device and the battery pack, where the support portion includes a support cavity and a reinforcing member accommodated in the support cavity, and the reinforcing member is an independent prefabricated member and is made of the same material as the housing.

ELECTRODE SHEET AND SECONDARY BATTERY

Resumen de: EP4794104A1

An electrode sheet (100) includes a current collector (10) including a current collector body (12) and a tab (14) extending from the current collector body (12) along a first direction (d); an active material layer (20) disposed on at least one side of the current collector (10) in a thickness direction; and a reinforcement rib (30). The tab (14) has a tab bare foil region (40) where the active material layer (20) is not disposed. In the first direction (d), the reinforcement rib (30) continuously extends from the tab bare foil region (40) to a surface of the active material layer (20). The disclosure provides an electrode sheet (100) and a secondary battery (1300) to at least achieve avoiding tab folding.

APPARATUS FOR CLEANING ELECTRODE ROLLING ROLL

Resumen de: EP4792944A1

0001 According to one embodiment of the present disclosure, provided is a device for cleaning an electrode rolling roll, comprising: a cleaning member provided so as to allow a surface of the electrode rolling roll to come into contact with a cleaning cloth, a spray nozzle that sprays a cleaning liquid onto the cleaning cloth, a control unit that adjusts the sprayed amount of the cleaning liquid, and a monitoring unit that monitors the sprayed amount of the cleaning liquid, wherein the cleaning liquid is a distilled water, and wherein the control unit adjusts the amount of the cleaning liquid sprayed once by the spray nozzle so as to be within a range of 0.05 ml to 0.2 ml.

LEAD-TAB LASER WELDING METHOD AND LEAD-TAB LASER WELDING APPARATUS

Resumen de: EP4792971A1

0001 The present invention relates to a lead-tab laser welding method for joining a lead portion and a tab portion, and the lead-tab laser welding method may comprise a seating step of disposing the lead portion and the tab portion of a secondary battery so as to overlap each other, and a laser welding step in which a welding unit forms a plurality of beads in an overlap region of the lead portion and the tab portion, wherein in the laser welding step, with respect to first, second, and third positions sequentially located along a first direction in the overlap region of the lead portion and the tab portion, the beads are formed in the order of the first position, the third position, and the second position.

ELECTROCHEMICAL APPARATUS AND ELECTRIC DEVICE

Resumen de: EP4794043A1

This application discloses an electrochemical apparatus and an electric device, and the electrochemical apparatus includes a housing, an electrode assembly, a first adhesive member, and a second adhesive member. A first sidewall of the housing includes an internal first surface and an external second surface opposite to each other along a first direction. The electrode assembly is disposed within the housing, and the electrode assembly includes a first side surface. The first adhesive member includes a first side portion and a second side portion opposite each other, where the first side portion includes a first adhesive region bonded to the first surface, and the second side portion includes a second adhesive region, a first non-adhesive region, and a third adhesive region sequentially arranged along a second direction, and the second adhesive region and the third adhesive region are bonded to the first side surface. Along the first direction, a projection of the first non-adhesive region overlaps with a projection of the first adhesive region. The second surface is bonded to an external structure through the second adhesive member. This application is conducive to suppressing impact on corners of the housing, and facilitates reducing the risk of damage to electrode plates of the electrode assembly.

SECONDARY BATTERY, BATTERY PACK AND ELECTRONIC DEVICE

Resumen de: EP4794070A1

Disclosed are a secondary battery (100), a battery pack (1002), and an electronic device (1000). The secondary battery (100) includes: a housing (200), including an end wall (111) and a side wall (109) surrounding the end wall (111), the end wall (111) having an opening portion (111V); an electrode assembly (120), including positive and negative electrode sheets (10, 20) and a separator (122); an electrode terminal (160), passing through the opening portion (111V) and fixed on the end wall (111); and a current collecting plate (202), disposed between the electrode assembly (120) and the end wall (111) and electrically connecting the electrode assembly (120) and the electrode terminal (160). Along a radial direction of the electrode assembly (120), the electrode assembly (120) includes a first region (Ra) and a second region (Rb). A minimum distance between a surface of the current collecting plate (202) facing the electrode assembly (120) and a first end (16u) of a negative electrode active material layer (16) along a first direction (D1) is L_A mm, L_A mm ≥1.5 mm.

ELECTRODE SHEET, SECONDARY BATTERY AND ELECTRONIC DEVICE

Resumen de: EP4794105A1

An electrode sheet (100), a secondary battery (500), and an electronic device (1000) are provided. The electrode sheet (100) includes: an electrode sheet body (160), including a current collector (110) and an active material layer (130), the current collector (110) has two opposite surfaces, and the two surfaces are respectively coated with active material layers (130); and a tab (150), extending from the electrode sheet body (160), the tab (150) is provided with a second stiffener region (192) and a first stiffener region (191), the second stiffener region (192) is disposed between the first stiffener region (191) and the active material layer (130), a stiffener (190) is disposed in the first stiffener region (191) and the second stiffener region (192), a depth (H1) of the stiffener (190) in the first stiffener region (191) is greater than a depth (H2) of the stiffener (190) in the second stiffener region (192).

LIQUID COOLING ASSEMBLY AND BATTERY PACK

Resumen de: EP4794057A1

A liquid cooling assembly and a battery pack are provided. The liquid cooling assembly includes a plurality of liquid cooling plates arranged at intervals and a main pipe. An installation space for mounting at least one heat-generating element is formed between two adjacent liquid cooling plates. Each of the liquid cooling plates includes a flow passage portion and a plurality of nozzles in communication with the flow passage portion. The main pipe includes a plurality of connectors, and the connectors are in one-to-one expansion connection to the nozzles and are inserted into the nozzles. An inner wall of each of the connectors is provided with a support ring that overlaps each of the nozzles (11).

INSPECTION APPARATUS AND INSPECTION METHOD

Resumen de: EP4794054A1

Disclosed herein relates to an inspection device including: an inspection jig including a first jig having a plurality of first pressure sensing elements and a second jig having a plurality of second pressure sensing elements, wherein the inspection jig is configured to generate thickness data regarding the thickness of a battery cell provided between the first jig and the second jig while the battery cell is in contact with the first jig and the second jig; and a processor configured to detect the bending dimensions and bending shape of the battery cell based on first pressure data generated from the plurality of first pressure sensing elements, second pressure data generated from the plurality of second pressure sensing elements, and the thickness data.

ELECTROLYTE SUITABLE FOR SODIUM ION BATTERY AND SODIUM ION BATTERY

Resumen de: EP4794047A1

The present invention relates to an electrolyte suitable for sodium-ion batteries and a sodium-ion battery. To solve the problem of poor room-temperature cycling performance, rate performance, and high-low temperature performance of sodium-ion batteries, the present invention provides an electrolyte suitable for sodium-ion batteries, comprising an electrolyte salt, an organic solvent, and an additive, wherein the organic solvent comprises a carbonate solvent, a fluorinated carboxylate solvent and a fluorinated benzene solvent, and the carbonate solvent does not include ethylene carbonate. The present invention improves the room-temperature cycling performance, rate performance, and high/low temperature performance of sodium-ion batteries through the synergistic cooperation of the carbonate solvent, the fluorinated carboxylate solvent, and the fluorinated benzene solvent.

FE-NI ALLOY CURRENT COLLECTOR HAVING LOW RESISTANCE MULTILAYER STRUCTURE AND SECONDARY BATTERY COMPRISING SAME

Resumen de: EP4794033A1

0001 The present invention relates to a current collector that has a Fe-Ni alloy formed on at least one surface of a core part composed of copper foil and which exhibits low resistance and high strength while improving corrosion resistance when used as a current collector of a secondary battery to which lithium ions and a lithium metal negative electrode or a sulfide-based solid electrolyte are applied.

BATTERY BOX, MANUFACTURING METHOD FOR BATTERY BOX, BATTERY AND ELECTRIC DEVICE

Resumen de: EP4794081A1

A battery box (100), a manufacturing method for the battery box (100), a battery (1100) and an electric device, the battery box (100) comprising a first box body (110). The first box body (110) comprises a plate component (111), one side of the plate component (111) being provided with an accommodating space (1101) for accommodating a battery cell (200). The plate component (111) comprises a plate body portion (1111) and a first bent portion (1112), wherein the first bent portion (1112) is bent towards the accommodating space (1101) from the edge of the plate body portion (1111). The fillet radius at the bend of the edge of the plate component (111) is small, so that the width dimension of the first box body (110) can be reduced, thereby reducing the width dimension of the battery box (100); thus, the space occupied by the battery (1100) in the electric device can be reduced, facilitating improvement to the structural compactness and usage performance of the electric device.

ANHYDROUS IRON PHOSPHATE AND PREPARATION METHOD THEREFOR, POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, POSITIVE ELECTRODE SHEET, AND SECONDARY BATTERY

Resumen de: EP4793231A1

0001 Provided is an anhydrous ferric phosphate and a preparation method thereof, a cathode electrode material and a preparation method thereof, a cathode electrode sheet, and a secondary battery, belonging to the field of a secondary battery. In terms of weight percentage, a quantity proportion of particles with a particle size greater than or equal to 0.01 µm and less than 0.1 µm in primary particles of the anhydrous ferric phosphate is 10%-30%, a quantity proportion of particles with a particle size of 0.1 µm-0.2 µm is 50%-60%, a quantity proportion of particles with a particle size greater than 0.2 µm and less than 0.4 µm is 15%-30%, and a quantity proportion of particles with a particle size of 0.4 µm-0.6 µm is 0.2%-10%. The present disclosure is beneficial for obtaining a well-dispersed anhydrous ferric phosphate by controlling particle gradation, which serves as a basis for preparing a highly compacted cathode electrode material and is advantageous for obtaining a cathode electrode material with high compact density, good rate performance, and high charging and discharging efficiency.

SUPPORTING SYSTEM FOR SUPPORTING A BATTERY ELONGATED STRUCTURE

Resumen de: SE2351182A1

SUMMARYA supportive system (140) is described, for supporting an elongated structure (130). The system comprises a first holding element (201) and a second holding element (202). The first element (201) features a receiving section (211) and a locking section (212) with a locking member (220), mating depression (221), and a groove (240) spanning both sections. This groove (240) has distinct profiles in the two sections. The second element (202) has a rim (250) and a beam (230) with a cantilevered hook (231). The rim (250) fits into the groove (240) and the hook (231) into the depression (221) of the first element (201). Together, they embrace the structure (130). The second element (202) slides from the receiving to the locking section, with the rim (250) and hook (231) aligning with the corresponding features of the first element (201).

SECONDARY BATTERY AND ELECTROCHEMICAL DEVICE

Resumen de: EP4794041A1

0001 An embodiment of the present application provides a secondary battery and an electrochemical device. The secondary battery includes an electrode assembly, where the electrode assembly is a flat wound structure, the electrode assembly includes a first electrode sheet, a second electrode sheet, and a separator, the separator is disposed between the first electrode sheet and the second electrode sheet, and an innermost electrode sheet of the electrode assembly is the first electrode sheet; where a length of the electrode assembly is denoted as L, a width of the electrode assembly is denoted as W, a thickness of the electrode assembly is denoted as H, meeting 0.9 ≤ L/W ≤ 1.1 and H ≤ 3 mm, the electrode assembly further includes an adhesive layer, an innermost turn of the first electrode sheet includes a first straight segment, a first bent segment, a second straight segment, and a second bent segment connected sequentially, the first electrode sheet has a first surface facing a winding core of the electrode assembly, and at least a portion of the adhesive layer is disposed on the first surface of the first straight segment and/or the first surface of the second straight segment. The technical solution according to some embodiments of the present application can improve the safety performance and cycling performance of the secondary battery.

LOW-IMPEDANCE STORAGE BATTERY

Resumen de: EP4794085A1

Provided in the present invention is a low-impedance storage battery, which comprises: an accommodation case, which is internally provided with an accommodation space; a first energy storage module, which is used for accumulating or supplying electric energy and is provided in the accommodation case; and a second energy storage module, which is used for storing or supplying a short-time large current and is provided in the accommodation case, the first energy storage module and the second energy storage module being electrically connected to each other. The second energy storage module at least comprises a circuit board, the circuit board having a second positive electrode and a second negative electrode. One side of the accommodation case is provided with a first electrical connector and a second electrical connector. One end of the first electrical connector and one end of the second electrical connector pass out of the accommodation case, and the other end of the first electrical connector and the other end of the second electrical connector are located in the accommodation case. The second positive electrode and the second negative electrode on the circuit board of the second energy storage module are respectively fixed at one end of the first electrical connector and one end of the second electrical connector in the accommodation case.

MULTIFUNCTIONAL POLYNORBORNENE BINDER SYSTEM

Resumen de: US2025118756A1

A cathode electrode assembly is disclosed, the cathode electrode assembly comprising an active material, a current collector, a conductive additive substance, and a polynorbornene-based (PNB) polymer binder configured to bind the active material and the conductive additive substance and maintain electrical contact between the active material and the conductive additive substance with the current collector. An alternative cathode electrode assembly comprising active material, a current collector, a conductive additive substance, a PNB polymer binder, and at least one polyacrylic acid (PAA) side chain configured to interface with the PNB polymer binder is also disclosed. A functional group is further disclosed, the functional group being configured to interface with a binder in a cathode electrode assembly of an electric battery system, the functional group comprising at least one PAA side chain.

APPARATUS FOR FORMING INCISIONS IN ELECTRODE PRECURSORS

Resumen de: WO2025078957A1

An apparatus (10) for forming incisions in electrode precursors comprises a laser head (11) configured to emit a laser beam (LB) having a predetermined wavelength along an optical path (OP), an incision formation zone (NZ) placed along the optical path (OP) of the laser beam (LB), a support device (12) for an electrode precursor (100) comprising a support structure (13) configured to receive and support the electrode precursor (100). The incision formation zone (NZ) is placed along a first portion (16) of the support structure (13) and in the incision formation zone (NZ) the first portion (16) of the support structure (13) is traversed by the optical path (OP) of the laser beam (LB). At least the first portion (16) of the support structure (13) is made of a material that is transparent to a laser beam having said predetermined wavelength.

APPARATUS FOR FORMING INCISIONS IN AN ELECTRODE PRECURSOR AND METHOD FOR FORMING INCISIONS IN AN ELECTRODE PRECURSOR

Resumen de: WO2025078960A1

An apparatus (10) for forming incisions in electrode precursors comprise a support drum (12) rotatable around a rotation axis (R1 ) and comprising a support surface (13) configured to receive and to support the electrode precursor (100), a laser head (11 ) placed at the rotation axis (R1 ) of the support drum (12) and configured to emit a laser beam (LB) along an optical path (OP), an incision formation zone (NZ) placed along the optical path (OP) of the laser beam (LB). The incision formation zone (NZ) is placed cantilevered with respect to said support surface (13). An adhesion device (16) is configured to generate forces (F) which have components having directions transverse to the support surface (13) and towards the support surface (13), the adhesion device (16) being configured to generate said forces (F) on the electrode precursor (100).

NEGATIVE ELECTRODE SHEET, SECONDARY BATTERY AND ELECTRICAL APPARATUS

Resumen de: EP4794013A1

0001 The present disclosure provides a negative electrode, a secondary battery, and an electric device, and belongs to the technical field of batteries. By controlling volume median particle sizes Dv50 of a first negative electrode active material and a second negative electrode active material in a negative electrode active material, a grading ratio (X) of the negative electrode active material, a tensile strength of the negative electrode, and a content of a first binder in the negative electrode active material layer to satisfy the following relationship: 0.69 ≤ (A + B) × X/(N × C) ≤ 160, the present disclosure can effectively enhance the adhesion and electrical conductivity of the negative electrode and effectively suppress the expansion and contraction of the negative electrode active material, thereby improving the stability of the negative electrode active material. This design enables the negative electrode active material to be uniformly distributed on the negative electrode, shortens the migration and diffusion path of lithium ions in the negative electrode active material, and reduces the resistance of the secondary battery while improving the cycling performance of the secondary battery.

SECONDARY BATTERY AND ELECTRIC DEVICE

Resumen de: EP4793995A1

0001 The present disclosure relates to a secondary battery and an electrical device. The secondary battery satisfies a relationship as follows: 0.3 ≤ A/100×(N+100P) ≤ 25; where A, in ppm, represents a mass content of the Al element in the positive electrode active material; P, in %, represents a weight percentage of the pyridine-based additive in the electrolyte; and N, in %, represents a weight percentage of the nitrile-based additive in the electrolyte. By correlating and defining the relationship between the key additives in the electrolyte and the Al content in the positive electrode active material, the present disclosure can effectively enhance the complexation between the nitrile-based and pyridine-based additives in the electrolyte and the positive electrode active material, thereby improving the film-forming stability of the battery during charging, and thus significantly enhancing the high-temperature stability of the battery.

CALENDER FOR PRODUCING VERY HIGH LINE FORCES, AND METHOD FOR OPERATING A CALENDER

Resumen de: WO2025078036A1

The invention relates to a calender (100) for calendering sheet materials (10), preferably in order to produce electrodes, having a first roller (1) and a second roller (2). The rollers (1, 2) can be moved relative to each other in an axial direction (A), and the calender (100) has first actuation means (7) for bending the first roller (1) by the introduction of torque in a radial direction (R). The invention additionally relates to a method for operating a calender (100).

SEPARATOR AND ELECTROCHEMICAL DEVICE

Resumen de: EP4794101A1

Disclosed are a separator (100) and an electrochemical device, specifically relating to the battery technology field. The separator (100) includes a porous base film (101), a heat-resistant layer (102) and an adhesive layer (103), wherein the heat-resistant layer (102) is disposed on at least one surface of the porous base film (101). The adhesive layer (103) is at least disposed on a surface of the heat-resistant layer (102) opposite to a surface in contact with the porous base film (101). An effective adhesion degree R-value of the separator (100) on a side where the heat-resistant layer (102) is provided is 40%-80%, and a difference between a maximum value and a minimum value of the effective adhesion degree R-value is <30%; wherein the effective adhesion degree R-value indicates a ratio of an effective adhesion area to a theoretical adhesion area of the separator (100).

SEPARATOR AND ELECTROCHEMICAL DEVICE

Nº publicación: EP4794045A1 19/08/2026

Solicitante:

AESC JAPAN LTD [JP]
AESC Japan Ltd.

Resumen de: EP4794045A1

Provided are a separator (100) and an electrochemical device. The separator (100) includes a porous base film (101) and a heat resistant layer (102). The heat resistant layer (102) is disposed on at least one surface of the porous base film (101), and includes inorganic particles and an adhesive agent. A surface static friction coefficient of the heat resistant layer (102) is ≤0.8, and a bulk density A of the heat resistant layer (102) satisfies: A=(0.4 to 0.5)×ρ. A heat resistant layer (102) with dense stacking and flat surface is obtained by controlling the static friction coefficient and bulk density of the heat resistant layer (102), which may increase an effective contact area between the adhesive particles in the heat resistant layer (102) and the electrode sheet, thereby increasing the adhesive force between the separator (100) as a whole and the electrode sheet.