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SECONDARY BATTERY

Resumen de: EP4804323A1

0001 Aspects herein relate to a secondary battery (100). The secondary battery may include an electrode assembly (140) configured such that a first electrode plate (142), a second electrode plate (144), and a separator (146) are wound together, a case (110) configured to receive the electrode assembly (140) therein, a cap assembly (130) configured to seal the case (110), and a composite current collecting plate (150) located between the electrode assembly (140) and the cap assembly (130), the composite current collecting plate (150) having a plurality of lead tabs (154, 156) integrally formed thereon and being electrically connected to the first electrode plate (142) and to the cap assembly (130), the plurality of lead tabs (154, 156) being connected to the cap assembly (130).

NEGATIVE ELECTRODE CASE FOR ALKALINE PRIMARY BUTTON BATTERY, AND ALKALINE PRIMARY BUTTON BATTERY

Resumen de: EP4804305A1

A negative electrode can (40) includes a top portion (42) and a negative-electrode-can peripheral wall portion (44), and is inserted into a positive electrode can (20). An inner cylindrical portion (45) of the negative-electrode-can peripheral wall portion (44) includes a first curved portion (51) extending in a curved manner downward from an outer peripheral edge of the top portion (42), a second curved portion (52) extending in a curved manner outward in a radial direction from a lower edge of the first curved portion (51), and a third curved portion (53) extending in a curved manner downward from an outer peripheral edge of the second curved portion (52). A radius of curvature of an outer surface (52a) of the second curved portion (52) in a longitudinal cross section is larger than a radius of curvature of an inner surface (51a) of the first curved portion (51) in the longitudinal cross section and a radius of curvature of an inner surface (53a) of the third curved portion (53) in the longitudinal cross section. In the longitudinal cross section, an angle θ formed between a common tangent line (L) of the inner surface (51a) of the first curved portion (51) and the inner surface (53a) of the third curved portion (53) and an axial direction is 40° or more and less than 60°.

BATTERY EQUALIZATION CONTROL METHOD, APPARATUS, DEVICE, STORAGE MEDIUM AND PROGRAM PRODUCT

Resumen de: EP4804374A1

0001 The present application relates to a battery equalization control method, an apparatus, a device, a storage medium and a program product. The method comprises: acquiring the current capacity and the current temperature of each battery branch in a battery system; according to the current capacity and the current temperature of each battery branch, determining a target temperature of each battery branch; and, according to the target temperature of each battery branch, performing thermal management on each battery branch so as to balance branch currents of the multiple battery branches. Using the present application can reduce the problem of ring current and increase the available capacity of battery systems.

BATTERY CELL ASSEMBLY, MANUFACTURING METHOD THEREFOR, BATTERY CELL, BATTERY, AND ELECTRICAL DEVICE

Resumen de: EP4804280A1

0001 The present application relates to a battery cell assembly, a manufacturing method therefor, a battery cell, a battery and an electrical device. The battery cell assembly comprises a first electrode sheet, a plurality of second electrode sheets and separators. The separators are arranged on two opposite sides of the first electrode sheet and are combined with the first electrode sheet so as to form a combined sheet, and the combined sheet is configured to be continuously Z-folded so as to form a plurality of sub-combined sheets, there being arranged one second electrode sheet between any two adjacent sub-combined sheets. In the length direction of the second electrode sheets, an isolation layer is connected between at least one side edge of each second electrode sheet and each sub-combined sheet. Since the isolation layers can connect the second electrode sheets to the sub-combined sheets, the distance between the second electrode sheets and the sub-combined sheets is shortened, thereby reducing gaps at corners of the combined sheet, improving the transport dynamic performance of a battery, and reducing phenomena of lithium plating at edges. In addition, when lithium-plating accumulation occurs at the edges, the provision of the isolation layers will stop dendrites generated by the lithium plating from puncturing the separators, thereby reducing risks of short circuits due to the connection between positive and negative electrodes.

SODIUM ION BATTERY CELL, POSITIVE ELECTRODE SHEET, PREPARATION METHOD THEREFOR AND RELATED DEVICE

Resumen de: EP4804257A1

A sodium ion battery cell, a positive electrode sheet, a preparation method therefor and a related device. The sodium ion battery cell comprises a positive electrode sheet, the positive electrode sheet comprising a positive electrode active material and a solid electrolyte interphase film at least bonded to the surface of the positive electrode active material, and the solid electrolyte interphase film comprising one or multiple cations from Na⁺, Li⁺, K⁺ and Ca²⁺. The solid electrolyte interphase film bonded to the surface of the positive electrode active material comprises cations such as Na^-, Li⁺, K⁺ and Ca²⁺, and the cations can participate in electrochemical reactions of the sodium ion batteries to provide reversible capacity, so as to compensate for the capacity loss caused by the passivation of the positive electrode active material, thus improving the cycle performance of batteries. Additionally, the solid electrolyte interphase film comprising the cations helps to reduce the impedance of batteries, thus further improving the cycle performance of batteries.

IRON PHOSPHATE AND PREPARATION METHOD THEREFOR, PRODUCTION DEVICE, AND LITHIUM IRON PHOSPHATE POSITIVE ELECTRODE MATERIAL

Resumen de: EP4803481A1

The present application provides an iron phosphate, a preparation method and production device thereof, and a lithium iron phosphate cathode material, which relates to the field of iron phosphate technology. The present application includes spherical secondary particles, the secondary particles are composed of primary particles, the primary particles have an octahedral structure, and an average side length of the primary particles is 200 nm-800 nm. In the present application, the provided iron phosphate has a high tap density, and the lithium iron phosphate cathode material made from this iron phosphate has good electrochemical performance.

BATTERY PACK AND SPACER

Resumen de: EP4804311A1

0001 Disclosed is a battery pack in which a spacer is disposed between unit cells, the battery pack being characterized in that the spacer includes an exterior material and an inclusion material, the exterior material includes a metal layer, and the metal layer is not in contact with the unit cells at a temperature of from 25 to 500°C. It is possible to provide a highly safe spacer and a battery pack incorporating the spacer.

ALL-SOLID RECHARGEABLE BATTERY

Resumen de: EP4804282A1

0001 An all-solid-state rechargeable battery is provided. The all-solid-state rechargeable battery includes a negative electrode; a solid electrolyte layer stacked on the negative electrode; a positive electrode provided with a positive active material layer on a positive electrode current collector and stacked on the solid electrolyte layer; and an insulating gasket positioned on the outside between the positive active material layer and the solid electrolyte layer, wherein the positive active material layer includes a high-density area corresponding to the gasket and compressed by the penetration of the gasket, and a low-density area provided inside the high-density area.

EXTERIOR MATERIAL FOR PARTITION MEMBER, METHOD FOR PRODUCING EXTERIOR MATERIAL FOR PARTITION MEMBER, PARTITION MEMBER, AND STRUCTURE

Resumen de: EP4803304A1

0001 The present invention provides an exterior material which is for a partition member, which is constituted by a laminate comprising at least a metal layer, an adhesive layer, and a thermally fusible resin layer in this order, and which suppresses a decrease in adhesive strength between the metal layer and the thermally fusible resin layer of the exterior material. Provided is an exterior material that is for a partition member and that is used for a partition member which is disposed between a plurality of heat-generating bodies, said exterior material being constituted by a laminate comprising at least a metal layer, an adhesive layer, and a thermally fusible resin layer in this order, wherein the adhesive layer is formed from a cured product of a polyolefin-based adhesive.

EXTERIOR MATERIAL FOR PARTITION MEMBER, METHOD FOR MANUFACTURING EXTERIOR MATERIAL FOR PARTITION MEMBER, PARTITION MEMBER, AND STRUCTURE

Resumen de: EP4803303A1

0001 Provided is an exterior material for a partition member. The exterior material for a partition member is used for a partition member disposed between a plurality of heating elements, and is composed of a laminate including at least a metal layer and a hot-melt adhesive resin layer, wherein the metal layer includes a corrosion-resistant film on a surface of the hot-melt adhesive resin layer.

CYLINDRICAL BATTERY

Resumen de: EP4804301A1

Provided is a cylindrical battery comprising: an electrode body in which a positive electrode and a negative electrode are wound with a separator therebetween; a cylindrical outer can (20) that has a bottom part (21) and accommodates the electrode body; and a sealing body that closes an opening in the outer can (20). The cylindrical battery is characterized in that the surface area of an outer surface (21A) of the bottom part (21) is 1.2 times or more the projection area of the outer surface (21A) of the bottom part (21).

ALL-SOLID RECHARGEABLE BATTERY

Resumen de: EP4804281A1

0001 The all-solid rechargeable battery includes a plurality of unit cells each of which is formed by stacking a negative electrode, a solid electrolyte layer, and a positive electrode, and ceramic insulating layers provided at least between the negative electrodes of adjacent ones among the unit cells and on the negative electrodes positioned on outermost sides of the entirety of the unit cells.

MANUFACTURING METHOD FOR ALL-SOLID-STATE SECONDARY BATTERY-MOUNTED CIRCUIT BOARD

Resumen de: EP4804279A1

0001 Provided is a method for manufacturing an all-solid-state secondary battery-mounted circuit board that can maintain good characteristics of the all-solid-state secondary battery. The method for manufacturing an all-solid-state secondary battery-mounted circuit board of the present invention is a method for manufacturing a circuit board on which an all-solid-state secondary battery is mounted, the all-solid-state secondary battery having a power generation element in which a positive electrode layer, a solid electrolyte layer, and a negative electrode layer are stacked in this order, and an exterior body accommodating the power generation element, the positive electrode layer including a sulfide-based solid electrolyte and a positive electrode active material on which a reaction suppressing layer is formed on at least a portion of a surface of the positive electrode active material, the method comprising a step of mounting the all-solid-state secondary battery on a circuit board through reflow soldering, wherein the all-solid-state secondary battery is subjected to the reflow soldering in a state in which a potential of the positive electrode layer is 2.55 V or less relative to the lithium potential.

POWER STORAGE DEVICE

Resumen de: EP4804284A1

In the present invention, a cylindrical battery (10) comprises: an electrode body (14) in which a positive electrode (11) and a negative electrode (12) are disposed with a separator (13) interposed therebetween; and an outer can (16) that accommodates the electrode body (14). The negative electrode (12) has a first end constituting a lower end section and a second end constituting an upper end section in the axial direction (negative electrode width direction) which is a first direction. In the negative electrode (12), a current is collected from the first end side, and one or more notches (46) are provided at the second end. The electrode body (14) may be a wound electrode body in which the strip-shaped positive electrode (11) and the strip-shaped negative electrode (12) are wound with the separator (13) interposed therebetween.

POWER STORAGE DEVICE

Resumen de: EP4804262A1

This power storage device (10) comprises a power storage cell (20) that is comprised of a positive electrode (21), a negative electrode (22), a separator (23), and a sealing part (24) that forms a sealed space for housing a liquid electrolyte between the positive electrode (21) and the negative electrode (22). The positive electrode (21) has a positive electrode active material layer (21b) that is formed on a first surface (21a1) of a positive electrode current collector (21a). The first surface (21a1) of the positive electrode current collector (21a) is formed of aluminum. The sealing part (24) is formed of an acid-modified polyolefin resin, and is bonded to the first surface (21a1) of the positive electrode current collector (21a). The positive electrode (21) comprises a carbon coating layer (M) that is provided, at a bonded portion with the sealing part (24), on the first surface (21a1) of the positive electrode current collector (21a). The carbon coating layer (M) contains carbon particles and a coating layer binding agent. The basis weight of the carbon coating layer M is 0.2 g/m² or more.

SEALED BATTERY

Resumen de: EP4804309A1

0001 A sealed battery (10) comprises an electrode body, an outer can (20), a sealing body (19), and a gasket (30) interposed between the outer can and the sealing body. The gasket has a protruding portion (31) that protrudes radially inward of the radially inner end of a radially bent portion (20c) that is formed at an opening-side end portion of the outer can and is bent radially inward. A cutout (32) which is continuous on at least a portion of the circumferential direction of the axially outer surface of the protruding portion and has a width in the radial direction so as to include a tip (37) of the protruding portion is formed. The axial thickness of the part of the protruding portion where the cutout is formed is smaller than the thickness of a part of the gasket that is adjacent to the radially outer side of the cutout.

NON-AQUEOUS ELECTROLYTE SOLUTION FOR SECONDARY BATTERY, AND SECONDARY BATTERY PROVIDED WITH SAID SOLUTION

Resumen de: EP4804277A1

0001 Provided is a nonaqueous electrolyte solution for a secondary battery which is excellent in electric capacity retention characteristics and favorably suppresses an increase in internal resistance when a secondary battery used at a high voltage is stored in a high-temperature environment, and exhibits favorable electric capacity retention characteristics even when such a secondary battery is repeatedly charged and discharged at a high charge voltage after storage in a high-temperature environment, and a secondary battery provided the same. The nonaqueous electrolyte solution for a secondary battery of the present invention contains an electrolyte and a nonaqueous solvent, and further contains at least one fluorophosphate represented by Chemical Formula (1) as an additive: wherein M<+> represents an alkali metal ion, R<1> to R<5> each independently represent a hydrogen atom, a hydrocarbon group having 1 to 10 carbon atoms, and the like, or R<1> to R<5> each independently represent any of a hydrocarbon group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, and the like, and optionally selected combinations are bonded to each other to form a cyclic structure, and n represents an integer of 0 to 10.

POWER STORAGE DEVICE

Resumen de: EP4804283A1

0001 A battery (10) comprises: an electrode body (14) in which a strip-shaped positive electrode (11) and a strip-shaped negative electrode (12) are wound with a strip-shaped separator (13) interposed therebetween; an outer can (16) that accommodates the electrode body (14) and includes a cylindrical section (30); and a sealing body (17) that closes an opening of the outer can (16). The negative electrode (13) has a first end and a second end in the axial direction of the electrode body (14), and the negative electrode (12) undergoes current collection on the first end side, and either includes a dispersion section in which sections of the second end that are neighboring in the radial direction are directly joined to or in contact with each other, or includes a dispersion section in which the same are indirectly joined to or in contact with each other via a second upper current collector plate (19) that is conductive.

NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Resumen de: EP4804269A1

A non-aqueous electrolyte secondary battery (10) disclosed herein includes a positive electrode (11), a negative electrode (12) that includes a negative electrode mixture layer, and a non-aqueous electrolyte. The negative electrode mixture layer contains the negative electrode active material and the binder component. The binder component includes a binder compound and a chelating agent. The negative electrode active material includes a silicon-containing material. The non-aqueous electrolyte contains the polyvalent cation.

COATED MEMBRANE, SEPARATOR AND RELATED METHODS

Resumen de: WO2025122603A1

Disclosed is an improved non-continuous and water-based adhesive coating containing large polymeric particles or agglomerate with an average particle size (D50) greater than 5 microns. The coating may be applied onto one or both sides of a porous film. A method of forming the coating involves applying an aqueous slurry containing the large polymeric particles with a D50 greater than 5 microns onto a porous membrane. The method of application may be a spray coating method.

BATTERY CELL, BATTERY, AND ELECTRIC DEVICE

Resumen de: EP4804268A1

Disclosed are a battery cell (100), a battery (200), and an electric apparatus (1000). The battery cell (100) includes a case (1), a pressure relief mechanism (2), and an electrode assembly (3). The case (1) has a first wall (11) and a second wall (12) that are adjacent and connected to each other. The pressure relief mechanism (2) is provided on the first wall (11). The electrode assembly (3) is provided in the case (1), the electrode assembly (3) has a first portion (3a) and a second portion (3b) sequentially arranged along a first direction (X), the first portion (3a) and the second portion (3b) each include multiple anode electrode sheet layers (32) and multiple cathode electrode sheet layers (31), the multiple anode electrode sheet layers (32) and the multiple cathode electrode sheet layers (31) are alternately stacked one-to-one along the first direction (X), the second portion (3b) is disposed between the first portion (3a) and the second wall (12), a distance from the cathode electrode sheet layer (31) of the second portion (3b) to the first wall (11) is greater than a distance from the cathode electrode sheet layer (31) of the first portion (3a) to the first wall (11), and the first direction (X) is perpendicular to the second wall (12).

HOT-PRESSING ROLLER MECHANISM, PRESSING ROLLER MECHANISM, ADHESIVE APPLICATION DEVICE AND BATTERY PRODUCTION SYSTEM

Resumen de: EP4804242A1

0001 Disclosed in the present application are a hot-pressing roller mechanism, a pressing roller mechanism, an adhesive application device and a battery production system. The hot-pressing roller mechanism comprises a hot-pressing roller and a heating assembly, wherein the heating assembly and the hot-pressing roller are spaced apart from each other; and the heating assembly is configured to perform non-contact heating on the hot-pressing roller. By means of non-contact heating, no structural member is introduced to the surface of the hot-pressing roller, such that the phenomenon of foreign matter being introduced to the surface of an electrode sheet during the process of the hot-pressing roller performing hot pressing on the electrode sheet can be alleviated, thus increasing the adhesive application yield. The hot-pressing roller mechanism is used to perform hot pressing on an electrode sheet to which an adhesive has been applied, and to smooth and compact an adhesive tape on the surface of the electrode sheet, thus enhancing the bonding tightness between the adhesive tape and the electrode sheet, and increasing the adhesive application yield.

BINDER COMPOSITION FOR MANUFACTURING ELECTRODE, ELECTRODE MATERIAL LAYER COMPOSITION FOR DRY PROCESS COMPRISING BINDER COMPOSITION, AND SECONDARY BATTERY COMPRISING SAME

Resumen de: EP4804258A1

0001 The present invention relates to an electrode material layer composition for a secondary battery and a secondary battery comprising the same, and more particularly, to a binder composition having a novel composition that comprises a ternary copolymer and is capable of improving adhesion between an electrode and a metal current collector, as well as binding strength among respective components within the electrode, regardless of whether it is applied in a wet process or a dry process, while stably maintaining electrical conductivity and thereby providing excellent electrochemical properties; and to an electrode material layer composition for a dry process comprising the binder composition, and a secondary battery comprising the same.

DRYING OVEN SYSTEM, AND CURRENT COLLECTOR PASSING-THROUGH CONTROL METHOD FOR DRYING OVEN SYSTEM

Resumen de: EP4803463A1

0001 Embodiments of the present application relate to the field of control, and provide a drying oven system, and a current collector passing-through control method for a drying oven system. The system compr i ses: an oven body, wherein a drying cavity is formed in the oven body, and a current collector inlet and a current collector outlet which are communicated with the drying cavity are formed in the oven body; a traction device passing through the drying cavity; a fixing part connected to the traction device; and a controller configured to control, when a current collector is fractured, a coating system to push a first fractured section of the current collector out to a first side outside the oven body and pull a second fractured section of the current collector out to a second side outside the oven body, and control the traction device and the fixing part to pull the first fractured section, which is fixed to the fixing part, to pass through the drying cavity, wherein the second side is a side in the opposite direction of the first side, and the first side or the second side is a current collector inlet side.

PHOSPHATE-BASED POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, POSITIVE ELECTRODE SHEET, AND SECONDARY BATTERY

Nº publicación: EP4804251A1 09/09/2026

Solicitante:

HUBEI WANRUN NEW ENERGY TECH CO LTD [CN]
Hubei Wanrun New Energy Technology Co., Ltd.

Resumen de: EP4804251A1

0001 The present application provides a phosphate cathode material, a preparation method thereof, a cathode plate, and a secondary battery, which belong to the field of battery material technology. The phosphate cathode material includes a core and a carbon layer coating the core. The core is represented by formula Na<3>V<2-x-y>AB(PO<4>)<2>F<3>, where 0≤x≤0.5, 0≤y≤0.5, and x and y are not simultaneously zero. Element A and element B each independently include one or more of Fe, Mn, Ti, Al, and Mg, and element A and element B are different from each other. A compaction density of the phosphate cathode material is greater than or equal to 2.0 g/cm<3>, and a BET specific surface area of the phosphate cathode material is greater than or equal to 8 m<2>/g. The core of the phosphate cathode material is doped with high voltage plateau metal elements, and is coated with the carbon layer, which can effectively improve the electronic conductivity, compaction density and BET specific surface area of the phosphate cathode material, thereby achieving excellent performance in terms of capacity, rate performance, and cycling performance.