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ELECTRODE CURRENT COLLECTOR FOR SECONDARY BATTERIES, AND SECONDARY BATTERY

Resumen de: EP4773253A1

An electrode current collector for secondary batteries includes a metal foil containing aluminum. The elongation percentage at break D1 of the metal foil at a tensile speed of 5.0 mm/min and the elongation percentage at break D2 of the metal foil at a tensile speed of 0.1 mm/min satisfy a relationship 1.3 ≤ D2/D1 . The tensile strength T1 of the metal foil at a tensile speed of 5.0 mm/min and the tensile strength T2 of the metal foil at a tensile speed of 0.1 mm/min satisfy a relationship 0.85 ≤ T2/T1.

BATTERY MANAGEMENT DEVICE, BATTERY SYSTEM, BATTERY MANAGEMENT METHOD, AND BATTERY MANAGEMENT PROGRAM

Resumen de: EP4773464A1

A measurement circuit is connected, with plural voltage measurement lines, to respective nodes of cells connected in series to one another and is configured to measure respective voltages across the cells. Each discharge circuit is connected to corresponding two adjacent voltage measurement lines of the plural voltage measurement lines and is configured to be connected in parallel to a corresponding cell of the cells. A control circuit is configured to execute a balancing process of balancing the cells by controlling each discharge circuit based on the respective voltages across the cells measured by the measurement circuit. The control circuit is configured to execute the balancing process when a variation of the respective voltages across the cells exceeds a first threshold. The control circuit is configured to determine that an error occurs when the variation of the respective voltages across the cells exceeds a second threshold obtained by adding an offset value to the first threshold.

CYLINDRICAL SECONDARY BATTERY

Resumen de: EP4773196A1

0001 Provided is a cylindrical secondary battery (10) comprising: an electrode body (14) in which a band-shaped positive electrode (11) and a band-shaped negative electrode (12) are wound along a longitudinal direction with a separator (13) therebetween; a nonaqueous electrolyte; and a cylindrical outer-casing can (15) that houses the electrode body (14) and the nonaqueous electrolyte, wherein the positive electrode (11) includes a positive electrode core (30), and a positive electrode mixture layer (32) disposed on the surface of the positive electrode core (30), wherein a positive electrode core exposed part (34), where the positive electrode core (30) is exposed, is formed at a portion in contact with only one end of the positive electrode (11) in the lateral direction thereof, and wherein the positive electrode core exposed part (34) is not formed in a range of L/10 from an outermost winding edge in the longitudinal direction of the positive electrode (11) when L represents the length of the positive electrode (11) in the longitudinal direction.

LASER-ASSISTED STRIPPING OF BATTERY PACKS

Resumen de: WO2025045454A1

A laser-cutting method for cutting open a battery assembly (10) is provided, the battery assembly (10) having a cell assembly (12) and a housing (14), which surrounds the cell assembly (12) and comprises a first housing shell (142) and a second housing shell (144), wherein the first housing shell (142) and the second housing shell (144) are firmly connected to one another along a connecting region (146) at the outer periphery of the housing (14). The method comprises creating a cut gap in the first housing shell (142) along a predefined cutting contour (C) by means of the laser-cutting method, wherein the cutting contour (C) extends laterally outside the cell assembly (12) and laterally inside a connecting region (146). A laser-cutting device for implementing the laser-cutting method is also provided.

BATTERY MODULE

Resumen de: GB2633029A

A battery module 7 comprising n cells including a first cell, wherein n is a non-zero positive integer. For each cell the battery module comprises a first switching element 91 coupled to a positive terminal of the cell, and a second switching element 92 coupled to a negative terminal of the cell, the first and second switching elements being coupled. The battery module further comprises a first inductor 101 coupled to the first and second switching elements corresponding to the first cell, a third switching element 93 coupled between the first inductor and a positive terminal of the battery module, the coupling between the first inductor and the third switching element forming a first node, a fourth switching element 94 coupled between the first node and a negative terminal of the battery module, wherein the coupling between the fourth switching element and the negative terminal of the battery module forms a second node, and the second switching element corresponding to the nth cell and the negative terminal of the nth cell are jointly coupled to the second node, and a capacitor 13 coupled between the negative and positive terminals of the battery module.

METHOD FOR MANUFACTURING A BATTERY CELL USING COMPRESSIVE FORCES

Resumen de: WO2025045820A1

A method for manufacturing a battery cell is performed during one or more manufacturing stages comprising at least one of: a dry stack time interval, electrolyte introduction, soaking, and precharge. The method comprises: providing a substantially rigid cell can (102) having a cell stack (302) disposed therein, the cell stack comprising a plurality of sheetlike cell layers arranged in a stack-like or roll configuration; and applying a supplemental, actively controllable compressive force to the cell stack (302) directly or indirectly by one or more inner walls of the cell can (102), wherein the supplemental compressive force is applied in addition to any forces resulting from electrolyte introduction into the cell can (102), and the supplemental compressive force is applied in a uniaxial direction that is substantially normal to the sheetlike cell layers, causing the sheetlike cell layers to have a denser configuration in the uniaxial direction compared to when no supplemental compressive force is applied.

BATTERY CELL, BATTERY APPARATUS AND ELECTRIC DEVICE

Resumen de: EP4773405A1

0001 A battery cell (100) includes an electrode core (2) with a plurality of electrode plates (21). Two ends of the electrode plate (21) are respectively provided with a tab (22) and a slitting edge (23). The plurality of electrode plates (21) include first electrode plates (211) and second electrode plates (212) having opposite polarities. Tabs (22) having opposite polarities are located on different sides of the electrode core (2). Tabs (22) located on a same side are electrically connected to a first connection surface (31) of a connection member (3) by using a transition piece (6). A spacing between the first connection surface (31) and the slitting edges (23) is L, a quantity of electrode plates (21) with same polarity is n, a quantity of bent layers of the tabs (22) is m and a thickness is t, a quantity of bent layers of the transition piece (6) is m1 and an overall thickness is t1, a thickness of the battery cell (100) is T, and the following is satisfied: 0.5≤N=(L-5-0.1*T/2)/(n*m*t+m1*t1)≤15.

BATTERY CELL, BATTERY APPARATUS, AND ELECTRIC DEVICE

Resumen de: EP4773406A1

A battery cell (100), including a jelly roll (2) that includes a plurality of electrode plates (21). A tab (22) and a cut edge (23) are provided at two ends of each electrode plate (21), respectively; the plurality of electrode plates (21) are classified into first electrode plates (211) and second electrode plates (212) which are arranged in sequence and have opposite polarities; the tabs (22) having opposite polarities are located on different sides of the jelly roll (2); the tabs (22) located on the same side are electrically connected to a first connecting surface (31) of a connector (3); and on the same side of the jelly roll (2), the distance between the first connecting surface (31) and the cut edge (23) is L, the number of electrode plates (21) having the same polarity is n, the number of bending layers of the tabs (22) is m, the thickness of the battery cell (100) is T, and the thickness of each electrode plate (21) is t, satisfying: 0.5≤N= (L-5-0.1*T/2)/(n*m*t)≤15.

METAL OXIDE AND USE THEREOF

Resumen de: EP4772470A1

The present invention relates to a metal oxide and use thereof. The metal oxide has a face-centered cubic structure, the space group is Fd-3m, the lattice constant a of the metal oxide is 8.32 Å to 8.37 Å, and in the metal oxide, the tensile residual stress F₁ is 0.105 MPa to 5.51 MPa, or the compressive residual stress F₂ is 1.05 MPa to 8.6 MPa. The metal oxide is prepared by spray pyrolysis with a pyrolysis rate K ranging from 0.361 to 48.611. The metal oxide of the present invention not only has a higher degree of crystallinity and high stability, but also has a high activity, which is beneficial to improve the intercalation of sodium ions or lithium ions when preparing a cathode material, thereby improving the comprehensive electrical performance.

AEROSOL GENERATING DEVICE AND OPERATING METHOD THEREFOR

Resumen de: EP4772057A1

0001 An aerosol generating device according to an embodiment includes a battery detachably disposed in a receiving portion, a battery monitoring unit configured to measure operation information of the battery, and a controller including an internal resistance calculation unit configured to calculate internal resistance of the battery based on the operation information of the battery. The controller is configured to determine whether the battery is normally mounted in the receiving portion by comparing a value of the calculated internal resistance with a preset reference value range.

ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE

Resumen de: EP4773221A1

Provided are an electrochemical device and an electronic device. The electrochemical device includes a positive electrode plate. The positive electrode plate includes a positive electrode active material layer, where the positive electrode active material layer includes a first positive electrode active material and a second positive electrode active material. The first positive electrode active material contains element Ni and element Mn, and the second positive electrode active material contains element Ni and element Co. A relationship curve of a capacity-voltage differential dQ/dV with respect to voltage V during discharge of the electrochemical device includes at least two peaks above 3.8 V. The electrochemical device can achieve good cycling performance and safety performance while meeting the demand for high energy density.

RECHARGEABLE LITHIUM BATTERY AND MANUFACTURING METHOD THEREFOR

Resumen de: EP4773278A1

0001 The present application relates to a rechargeable lithium battery and a manufacturing method thereof, the lithium battery includes a voltage regulation circuit assembly, a plastic frame, a first metal housing, a lithium cell and an insulation sheath, wherein the lithium cell includes a winding cell assembly, a high-voltage positive electrode cap assembly and a second metal housing, an annular rolling groove is formed on an upper portion of the second metal housing, the second metal housing is divided by the annular rolling groove into a lower body portion and an upper contraction portion, the contraction portion of the second metal housing is embedded in the first metal housing, an outer surface of the first metal housing is aligned with an outer surface of the second metal housing.

SECONDARY BATTERY AND ELECTRONIC DEVICE

Resumen de: EP4773283A1

This application provides a secondary battery and an electronic device. The secondary battery includes an electrode assembly. The electrode assembly includes first electrode plates, second electrode plates, and separators. The first electrode plates include two outer first electrode plates and an inner first electrode plate. The two outer first electrode plates are located on two outermost sides of the electrode assembly respectively. The first electrode plate includes a first current collector and a first active material layer. The first current collector includes a first surface and a second surface. At least one of the outer first electrode plates is a single-side-coated first electrode plate. The first active material layer applied to the second surface of the single-side-coated first electrode plate is a first material layer. Both the first surface and the second surface of the inner first electrode plate are coated with the first active material layer. The first active material layer applied to the first surface and the second surface of the inner first electrode plate is a second material layer. A conductivity of the single-side-coated first electrode plate is a S/cm, and a conductivity of the inner first electrode plate is b S/cm, satisfying a ≤ b. This configuration reduces the risk of black spots and lithium plating on the outer electrode plates of the electrode assembly.

ALUMINUM ALLOY BATTERY PACK BRACKET AND MANUFACTURING PROCESS THEREFOR

Resumen de: EP4772371A1

0001 The present invention relates to the technical field of aluminum alloy battery pack bracket manufacturing, and in particular to an aluminum alloy battery pack bracket and a manufacturing process thereof. The manufacturing process includes: blanking: obtaining a bar; die heating: heating a forging die; forging: placing the bar into the heated forging die for forging, to obtain a pre-forged part of the aluminum alloy battery pack bracket; trimming: removing flash, to obtain an intermediate product of the aluminum alloy battery pack bracket; solution treatment and aging treatment: sequentially subjecting the intermediate product of the aluminum alloy battery pack bracket to solution treatment and aging treatment, to obtain a heat-treated workpiece of the aluminum alloy battery pack bracket; and inspection and packaging. The present invention optimizes the solution treatment and aging treatment processes to reduce forming stress, thereby minimizing the extent of internal stress damage and residual stress within the workpiece and further suppressing the growth of coarse grains in stress-affected areas. Meanwhile, the forging die solves the problems of difficult placement and positioning of raw material bars during forging, prevents fold defects caused by deflection of raw material bars, and avoids low utilization caused by non-uniform material flow in different directions.

NEGATIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREOF AND LITHIUM ION BATTERY

Resumen de: EP4773190A1

0001 Provided are a negative electrode material and a preparation method thereof and a lithium ion battery, specifically relating to the technical field of lithium ion batteries. The Young's modulus E of the negative electrode material has a value of: 8GPa≤E≤17Gpa, the negative electrode material includes natural graphite and a coating layer coated on the surface of the natural graphite. The negative electrode material of the disclosure has a relatively high Young's modulus, may better maintain the microscopic crystal structure when lithium ions deintercalate, undergoes smaller irreversible deformation, and has better cycle performance.

BATTERY CELL, MANUFACTURING METHOD THEREFOR AND BATTERY ASSEMBLY COMPRISING SAME

Resumen de: EP4773363A1

0001 A battery cell manufacturing method of the present disclosure comprises: an insertion step of inserting a cap part into an opening; and a connection step of irradiating a laser at the cap part and a body part so as to connect the cap part to the body part, wherein, a welding bead for connecting the cap part to the body part is formed in the connection step, and the welding bead can satisfy formula 1. (Formula 1) T ≤ D (In formula 1, D is the thickness of a welding bead with respect to the cross-section of a battery cell in the thickness direction of a cap part, and T is the thickness of the cap part.)

POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, LITHIUM-ION BATTERY, AND ELECTRICAL DEVICE

Resumen de: EP4773229A1

The present disclosure belongs to the technical field of batteries, and specifically discloses a cathode material and a preparation method thereof, a lithium-ion battery, and an electrical device. The cathode material satisfies: 1.590 = (Ln₉₀-Ln₁₀)/Ln₅₀<4.5; 010<2000 Å; Ln₁₀50<3000 Å; and Ln₅₀90<15000 Å.

AEROSOL-GENERATING DEVICE

Resumen de: EP4772056A1

0001 An aerosol generating device according to an embodiment may include a main body including a battery accommodation space, a battery detachably coupled to the battery accommodation space, a first terminal arranged in the battery accommodation space, the first terminal being electrically connected to the battery when the battery is coupled to the battery accommodation space, and a first sealing member arranged to surround the first terminal and configured to prevent introduction of external impurities into the first terminal, wherein the battery may include a battery terminal and a battery sealing member, the battery terminal being in contact with the first terminal and the battery sealing member surrounding the battery terminal, the first sealing member may include a movable first cover, and the battery sealing member may include a movable second cover.

ELECTRODE SHEET PREPARATION METHOD, ELECTRODE SHEET, BATTERY, AND ELECTRIC DEVICE

Resumen de: EP4773219A1

The present application relates to the technical field of batteries, and in particular, to a preparation method for an electrode sheet, an electrode sheet, a battery, and an electric device. The preparation method for an electrode sheet includes: preparing an active layer comprising an active material and a binder on at least one side of a current collector; performing a heating treatment on the active layer to cause a temperature of a surface layer of the active layer to rise to a heating temperature; and performing a thermal insulation treatment on the active layer to cause the surface layer of the active layer to be at a thermal insulation temperature, where each of the heating temperature and the thermal insulation temperature is separately higher than or equal to a melting point or a softening point of the binder and lower than a decomposition temperature of the binder. The electrode sheet prepared by the method of the present application may enable a battery using the electrode sheet to have good cycling performance.

VEHICLE INTEGRATED DOMAIN CONTROLLER ARCHITECTURE, VEHICLE MANAGEMENT SYSTEM AND VEHICLE

Resumen de: EP4772384A1

0001 A vehicle integrated domain controller architecture (800), a vehicle management system, and a vehicle are disclosed. The vehicle integrated domain controller architecture (800) includes: a low-voltage battery (300), a battery management module (100), a low-voltage power distribution module (200), and a thermal management module (900), where the low-voltage battery is electrically connected to the low-voltage power distribution module; the low-voltage power distribution module is configured with a low-voltage load access terminal (210) configured to connect to a low-voltage load; the thermal management module is configured with a thermal management load access terminal (910) configured to connect to a thermal management load; and the battery management module, and the low-voltage power distribution module, and the thermal management module share the same controller. By integrating in the controller a function of managing the low-voltage battery and a function of managing the thermal management load and the low-voltage load, the control lines are simplified.

BATTERY CASE, BATTERY, AND ELECTRIC DEVICE

Resumen de: EP4773373A1

0001 A battery case (100), a battery (200), and an electric device (1000). The battery case (100) comprises a first case portion (1), a second case portion (2), a first sealing member (3), and first fastening members (4); the first case portion (1) and the second case portion (2) are sealedly connected to form a sealed cavity (101), the first case portion (1) comprises a first sealing surface (10), the second case portion (2) comprises a second sealing surface (20), and the first sealing surface (10) and the second sealing surface (20) match to each other to form a sealing interface; the first sealing member (3) is arranged at the sealing interface to seal the first sealing surface (10) and the second sealing surface (20); the first fastening members (4) pass through the first sealing surface (10) and the second sealing surface (20) to connect the first sealing surface (10) and the second sealing surface (20) to clamp the first sealing member (3), so that the first sealing surface (10) and the second sealing surface (20) are sealedly connected; the first fastening members (4) are completely located on the outer side of the sealed cavity (101), and in the direction of extension of the sealing interface, the first fastening members (4) are located on the side of the first sealing member (3) away from the sealed cavity (101).

SECONDARY BATTERY AND ELECTRONIC DEVICE

Resumen de: EP4773428A1

This application discloses a secondary battery and an electronic apparatus. The secondary battery includes a packaging pouch, an electrode assembly, an electrical connection member, a first insulating member, and a second insulating member, where the electrode assembly is located in the packaging pouch, the electrode assembly includes a main body portion and a tab assembly, the tab assembly includes a plurality of tabs, and the electrical connection member is located outside the packaging pouch and is electrically connected to the tab assembly. The tab assembly includes a first portion and a second portion. The first portion protrudes from the main body portion and is connected to the second portion. The second portion is bent toward the main body portion, the second portion forms a weld mark with the electrical connection member, and the second portion includes a first surface and a second surface. The first insulating member covers the weld mark, the second insulating member is located on one side in a thickness direction of the tab, and the second insulating member extends from the first surface of the second portion through the first portion to the main body portion. A thickness of the first insulating member is T₁, a thickness of the second insulating member is T₂, T₁ > T₂, 25 µm ≤ T₁ ≤ 60 µm, and T₂ ≥ 4 µm, balancing the safety performance and drop performance of the secondary battery.

NONAQUEOUS ELECTROLYTE SOLUTION AND NONAQUEOUS ELECTROLYTE BATTERY USING SAME

Resumen de: EP4773295A1

0001 A nonaqueous electrolyte solution capable of improving the cycle characteristic and the initial resistance of a nonaqueous electrolyte solution battery having a negative electrode containing Si and/or a Si metal oxide and graphite as negative electrode active materials in a well-balanced manner is provided. The nonaqueous electrolyte solution contains (I) at least one selected from the group consisting of a compound represented by the following general formula (1), a compound represented by the following general formula (2), a compound represented by the following general formula (3), and a compound represented by the following general formula (4), (II) a solute, and (III) a nonaqueous organic solvent.

COMPOUND HAVING OXAZOLIDINE STRUCTURE, NONAQUEOUS ELECTROLYTE CONTAINING SAID COMPOUND, AND NONAQUEOUS ELECTROLYTE BATTERY CONTAINING SAID NONAQUEOUS ELECTROLYTE

Resumen de: EP4773296A1

A nonaqueous electrolyte solution capable of exhibiting superior cycle characteristic to that of a case containing a known compound of the related art is provided. The nonaqueous electrolyte solution contains (I) a solute, (II) a nonaqueous organic solvent, and (III) at least one selected from the group consisting of compounds represented by the following formulae (1) to (8).

SECONDARY BATTERY, MANUFACTURING METHOD FOR SECONDARY BATTERY, AND ELECTRICAL APPARATUS

Nº publicación: EP4773282A1 08/07/2026

Solicitante:

NINGDE AMPEREX TECHNOLOGY LTD [CN]
Ningde Amperex Technology Limited

Resumen de: EP4773282A1

0001 This application relates to the technical field of energy storage, and specifically discloses a secondary battery, a secondary battery manufacturing method, and an electrical device. The secondary battery includes an electrode assembly. The electrode assembly includes a first electrode plate, a second electrode plate, a separator, and a filler. The first electrode plate includes a first current collector and a first active material layer. The second electrode plate includes a second current collector and a second active material layer. The separator is disposed between the first active material layer and the second active material layer. The first active material layer is provided with a groove. The groove includes a groove opening and a groove wall. Another side of the separator facing the groove opening corresponds to the second active material layer. The filler includes a filling portion. The filling portion is located in the groove. The filling portion covers at least a part of the groove wall. The filler can separate the separator from lithium dendrites deposited in the groove, and limit the growth of lithium dendrites in the groove toward the separator, thereby hindering the lithium dendrites from piercing the separator.