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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.

LITHIUM SECONDARY BATTERY

Resumen de: EP4773398A1

A lithium secondary battery (10) disclosed includes a positive electrode (11), a negative electrode (12), a separator (13) and a spacer (53) that are disposed between the positive electrode (11) and the negative electrode (12), and a nonaqueous electrolyte. The negative electrode (12) is an electrode on which lithium metal is deposited during charging, and from which the lithium metal dissolves during discharging. The negative electrode (12) includes a negative electrode base foil (12a) having a negative electrode current collector foil. At least one portion selected from the group consisting of a portion of the separator (13) that is in contact with a spacer (53) and a portion of the spacer (53) is embedded in the negative electrode base foil (12a).

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.

BOTTOM SUPPORT APPARATUS, GRABBING DEVICE, PRODUCTION LINE, AND METHOD FOR REPLACING TYPE OF BOTTOM SUPPORT APPARATUS

Resumen de: EP4773270A1

The present disclosure relates to the technical field of batteries, and provides a bottom support apparatus, a grabbing device, a production line, and a method for replacing the type of a bottom support apparatus. The bottom support apparatus comprises a plurality of mounting units, a bottom support set, and a plurality of type-replacing mechanisms. Each mounting unit comprises two mounting platforms spaced apart along a first direction, and the plurality of mounting units are spaced apart along a second direction. The bottom support set comprises a plurality of bottom support boards. The plurality of bottom support boards are spaced apart along the second direction, and each bottom support board corresponds to the two mounting platforms of one of the mounting units. Two ends of each bottom support board along the first direction are each detachably connected to one of the type-replacing mechanisms. The type-replacing mechanisms are detachably connected to the mounting platforms. The first direction is perpendicular to the second direction.

GRABBING DEVICE, MATERIAL GRABBING ROBOT, BATTERY PRODUCTION LINE, AND MATERIAL-GRABBING CONTROL METHOD

Resumen de: EP4772460A1

This application relates to the field of battery technologies and provides a grabbing apparatus, a material grabbing robot, a battery production line, and a material grabbing control method. The grabbing apparatus includes a mounting frame, a gripper mechanism, and a driving member. The gripper mechanism includes a first position finding member, a second position finding member, a first clamping jaw, a second clamping jaw, and a movable component. The first clamping jaw is arranged on the mounting frame, the second clamping jaw is movably arranged on the movable component, the first position finding member is arranged on the movable component, the second position finding member is arranged on the second clamping jaw, and the second position finding member has a staggered position and a detection position. When the second position finding member is located at one of the staggered position and the detection position, the second clamping jaw and the first clamping jaw clamp a battery cell. When the second position finding member is located at the other of the staggered position and the detection position, the second clamping jaw and the first clamping jaw release the battery cell. The driving member is arranged on the mounting frame and is configured to drive the movable component to move, so that the first clamping jaw and the second clamping jaw clamp or release the battery cell. The grabbing apparatus can grab battery cells of different sizes.

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.

METHOD FOR RECOVERING CAPACITY OF AN ELECTROCHEMICAL ENERGY STORAGE DEVICE, AND CORRESPONDING DEVICE AND COMPUTER PROGRAM

Resumen de: WO2025045846A1

Disclosed is a method for recovering capacity of an electrochemical energy storage device, comprising alternating steps of: a. fully charging (S1) the device to a maximum charge voltage (Umax); b. relaxing (S2) the device for a period TREL; the alternating steps being repeated during a period of unavailability TIND of the electrochemical device and carried out at a cycling current CCyc less than or equal to the maximum current supported by the electrochemical device in normal operation.

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

Resumen de: EP4773223A1

0001 The positive electrode active material for a lithium secondary battery according to the present invention includes a lithium metal oxide in a single-particle form and a coating layer located on a surface of the lithium metal oxide, and the coating layer may include Al and W.

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.

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.

NEGATIVE ELECTRODE SHEET, ELECTROCHEMICAL APPARATUS, AND ELECTRICAL DEVICE

Resumen de: EP4773199A1

The present application relates to the field of battery technologies and discloses a negative electrode plate, an electrochemical apparatus, and an electric device. The negative electrode plate includes a first active material layer, a first current collector, and a second active material layer; the first active material layer includes a first coating and a second coating disposed between the first coating and the first current collector, along a first direction, a first end of the second coating exceeds a first end of the first coating, such that the first active material layer has a first single-layer portion, and/or along a second direction, a second end of the second coating exceeds a second end of the first coating, such that the first active material layer has a second single-layer portion, where the first direction and the second direction are opposite. The negative electrode plate, along the first direction or the second direction, has the second coating exceeding the first coating, thereby addressing the issue that two end portions of the active material layer are prone to overpressure during the rolling process, which leads to damage to the first current collector. This reduces the probability of tape breakage during the rolling process of the negative electrode plate and improves the production yield of the negative electrode plate.

SECONDARY BATTERY AND ELECTRONIC DEVICE

Resumen de: EP4773356A1

0001 This application discloses a secondary battery and an electronic device. The secondary battery includes an electrode assembly, a packaging bag, and an insulation adhesive. The packaging bag includes a main portion and a first side seal edge. The main portion accommodates the electrode assembly, and includes a first sidewall and a second sidewall disposed along a thickness direction of the secondary battery. The first side seal edge includes a first connecting portion and a second connecting portion disposed in sequence. The first connecting portion is connected to the main portion. The second connecting portion is bent toward the main portion relative to the first connecting portion. An angle θ is formed between the first connecting portion and the first sidewall, satisfying: 0° < θ < 90°. A thickness of the main portion is less than a width of the first connecting portion. The insulation adhesive covers one end, facing the main portion, of the second connecting portion. The insulation adhesive bonds the first connecting portion to the second connecting portion, and further bonds the second connecting portion to the main portion. This application increases energy density. When sealing an end portion of the second connecting portion, this application reduces the risk of deformation of the first side seal edge.

SECONDARY BATTERY AND ELECTRONIC APPARATUS

Resumen de: EP4773279A1

A secondary battery and an electronic apparatus are provided. A positive electr ode sheet in the secondary battery includes a positive electrode current collector, a pos itive electrode active material layer, and a positive electrode tab, where the positive el ectrode active material layer is disposed on at least one surface of the positive electrod e current collector. The positive electrode active material layer is provided with a first groove exposing the positive electrode current collector. The positive electrode tab is disposed in the first groove and connected to the positive electrode current collector. An insulating tape is provided on each of a surface of the positive electrode tab and a r egion, corresponding to the first groove, of a surface of the positive electrode sheet aw ay from the positive electrode tab. A melting point of the insulating tape is 250°C to 4 50°C. An electrolyte includes carbonate and carboxylate. Based on a mass of the elect rolyte, a mass percentage of the carbonate is denoted as A and a mass percentage of th e carboxylate is denoted as B, where A and B satisfy: 75% ≤ A + B ≤ 88% and 1 < A / B. Through the above configuration, the secondary battery has good reliability.

POWER CONVERSION SYSTEM-BASED CHARGING METHOD AND APPARATUS, AND POWER CONVERSION SYSTEM

Resumen de: EP4773458A1

A power conversion system-based charging method and apparatus, and a power conversion system. A soft-start circuit (301) connected in parallel with a first branch (302) can be used to perform voltage compensation on a bus by means of a direct current side. A voltage of the first branch (302) of a positive electrode of a battery is acquired as a first voltage, a voltage of a second branch (303) of the positive electrode of the battery is acquired as a second voltage, a difference between said voltages is calculated, the value of the first voltage is compared with the value of the second voltage when the difference is greater than a preset voltage value, the bus undergoes voltage compensation by using the direct current side so that the voltage of the bus is equal to the smaller voltage value, and then the bus is charged on the basis of the larger voltage value. A power conversion system is compatible with a multi-branch system and is used for a multi-branch topology, and a voltage compensation method of the power conversion system is not limited by the incapability to perform voltage compensation due to a low voltage of the branch where the soft-start circuit (301), thereby reducing the cost and improving the efficiency without affecting the system function, and greatly improving the utilization rate.

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Resumen de: EP4773321A1

0001 The present invention provides a nonaqueous electrolyte secondary battery in which electrode plate deformation near a winding start end part of a positive electrode caused by charge/discharge cycles can be suppressed. 0002 Disclosed is a nonaqueous electrolyte secondary battery in which a negative electrode (12) that constitutes a wound electrode body has a negative electrode mixture layer (32). The negative electrode mixture layer (32) has: a non-facing part (12a) that is disposed on the inner end side in the winding direction of the electrode body and does not face a positive electrode (11) with a separator interposed therebetween; and a facing part (12b) that is disposed on the outer side, in the winding direction, from the outer end in the winding direction of the non-facing part (12a) and that faces the positive electrode (11) with the separator interposed therebetween. The length of the non-facing part (12a) in the winding direction is not less than 0.3 turns. The inner circumferential surface of the negative electrode mixture layer (32) is provided with a recess (33) that straddles the boundary between the non-facing part (12a) and the facing part (12b), and the length of the recess (33) in the winding direction from the boundary to the outer end in the winding direction of the recess 33 is less than one turn.

LITHIUM SECONDARY BATTERY

Resumen de: EP4773324A1

A lithium secondary battery includes: an electrode group including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte. In the negative electrode, lithium metal is deposited during charging, and the lithium metal is dissolved in the non-aqueous electrolyte during discharging. The separator includes a sheet-shaped substrate, and a spacer disposed on a principal surface of the substrate. The spacer includes a protruding portion, an end portion of the positive electrode includes a portion A overlapping the protruding portion. An insulating layer is disposed between at least part of the portion A and the negative electrode.

NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Resumen de: EP4773319A1

0001 The positive electrode active material contains a lithium-containing composite oxide; the negative electrode active material contains a silicon-containing material; the discharge capacity per 1.0 g of the negative electrode mixture layer (52) is 0.5 Ah or more; and the thickness of the negative electrode mixture layer (52) is 85 µm or less. The positive electrode (11) has one or more double-sided positive electrode current collector exposed parts (45a, 45b), and the negative electrode (12) has one or more double-sided negative electrode current collector exposed parts (55a). The one or more double-sided positive electrode current collector exposed parts (45a, 45b) include one or more lead fixing exposed parts (45a), and a negative electrode lead (21) is fixed to the double-sided negative electrode current collector exposed part (55a). The double-sided negative electrode current collector exposed part (55a) faces double-sided positive electrode current collector exposed parts (45a, 45b) through an interposed separator (13), and at least a part of a positive electrode lead (20) is fixed in a location that overlaps in the height direction with the negative electrode lead facing position in the positive electrode (11) that the negative electrode lead (21) faces via the interposed separator (13).

LITHIUM-ION BATTERY HAVING BINDER-FREE ANODE

Resumen de: WO2025049747A1

The present invention relates to a lithium-ion battery (LiB) having a binder-free anode comprising an active material and about 1-5% by weight of single wall carbon nanotubes (SWCNT) as a conductive additive, wherein the SWCNT has an inorganic impurity content of less than 10% by weight. The LiB of the present invention having a binder-free anode, provides higher capacity than a LiB having an anode that contains a polymeric binder.

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.

ELECTRODE MANUFACTURING METHOD, BATTERY AND ELECTRIC DEVICE

Resumen de: EP4773250A1

The present application discloses an electrode manufacturing method, a battery, and an electrical apparatus. The electrode manufacturing method comprises steps of: providing a slurry mixed with a pore-forming agent; coating the slurry on a current collector to form an active material layer on the current collector; and electrically energizing the active material layer to cause the pore-forming agent in the active material layer to undergo an electrochemical reaction to form pores. Before the step of coating the slurry on the current collector, the method further comprises a step of: providing a roller configured to coat and convey the current collector and provided with a conductive member on a surface of the roller, the conductive member being configured to electrically connect to the current collector. The step of electrically energizing the active material layer comprises electrically energizing the current collector through the conductive member. The technical solutions provided in the present application can improve the pore-forming efficiency of the electrode, thereby enabling, when the electrode is used in the battery, the battery to have relatively high manufacturing efficiency.

BATTERY CELL LITHIUM PRECIPITATION POTENTIAL DETERMINATION METHOD AND APPARATUS, STORAGE MEDIUM AND ELECTRONIC DEVICE

Nº publicación: EP4772897A1 08/07/2026

Solicitante:

EVE ENERGY CO LTD [CN]
Eve Energy Co., Ltd.

Resumen de: EP4772897A1

The present application relates to method and apparatus for determining a lithium plating potential of a battery cell, storage medium, and electronic device, wherein the method includes: obtaining a voltage and a capacity of the battery cell at different charging rates, and a voltage and a capacity of the battery cell at the same discharge rate; plotting a first relationship curve and a second relationship curve; plotting a charging capacity differential curve based on the first relationship curve, and plotting a discharge capacity differential curve based on the second relationship curve; and finally determining the lithium plating potential of the battery cell based on the two differential curves.