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575
results.
Updated on
14/09/2026 [07:52:00]
Results 450 to 475 of 575
Absstract of: EP4804246A1
0001 The present invention provides a nonaqueous electrolyte secondary battery which is capable of achieving high output. A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure includes: a wound electrode body which is obtained by winding a belt-shaped positive electrode and a belt-shaped negative electrode, with a separator being interposed therebetween; and an outer package which houses the electrode body. The positive electrode has a positive electrode current collector and a positive electrode mixture layer that is formed on the surface of the positive electrode current collector. A positive electrode current collector exposed part, in which the positive electrode current collector is exposed, is formed in the surface of the positive electrode. A positive electrode tab is connected to the positive electrode current collector exposed part. The positive electrode mixture layer has a normal part and thick parts that are thicker than the normal part. The thick parts are close to both ends of the positive electrode current collector exposed part in the longitudinal direction of the positive electrode.
Absstract of: EP4804249A1
The present application provides a cathode material, a method for preparing the same, a cathode plate, a sodium-ion battery, and an electrical device, belonging to the battery field. The cathode material includes a core and a carbon-containing coating layer coated on at least part of a surface of the core. The core contains sodium vanadium fluorophosphate. A button battery is prepared using the cathode material and is subjected to an Nth charge-discharge test. In a discharge curve of the Nth charge-discharge test, a discharge specific capacity is C0; and a discharge specific capacity of a discharge platform corresponding to a voltage of 3.3 V to 3.4 V is C1, C1/C0<6.7%, where N is an integer equal to or greater than 1. The Nth charge-discharge test is performed at 20°C to 30°C by charging the button battery at a constant current of 0.2C rate to 4.3 V and then discharging the button battery at a constant current of 0.2C rate to 2 V. The cathode material provided in the present application has relatively high discharge specific capacity and electronic conductivity.
Absstract of: EP4804244A2
Provided herein are compositions and methods for calendering cathode materials for lithium battery construction.
Absstract of: EP4804300A2
0001 The present utility model provides a battery cell and a battery pack. The battery cell includes: a casing and a cell core, which is placed inside the casing, wherein the battery cell also includes an additional layer formed by coating, positioned between the cell core and the casing, this additional layer being an insulating material layer. The present utility model can achieve electrical insulation between the cell core and the casing in the battery cell.
Absstract of: EP4804319A1
0001 A battery cell (10) is provided. The battery cell (10) includes a housing (1), a pressure relief mechanism (6), an electrode assembly (2), and a separator (7). The housing (1) has a first wall (111). The pressure relief mechanism (6) is provided on the housing (1). The electrode assembly (2) is provided in the housing (1). The separator (7) is provided between the electrode assembly (2) and the first wall (111), the separator (7) is configured to separate the electrode assembly (2) and the first wall (111), and the separator (7) is provided with an exhaust passage (8). The exhaust passage (8) is configured to guide gas in the battery cell (10) to the pressure relief mechanism (6). The separator (7) includes a first portion (711) and a second portion (712). A melting point of the first portion (711) is higher than a melting point of the second portion (712). At least a portion of the exhaust channel (8) is defined by the first portion (711). The battery cell (10) reduces the risk that gas in the battery cell (10) is hindered from flowing to the pressure relief mechanism (6) due to melting of the separator (7) melting caused by thermal runaway of the battery cell (10), thereby improving the reliability of batteries.
Absstract of: EP4804241A1
0001 An electrode for secondary batteries includes: an electrode current collector in the form of a sheet, an electrode mixture layer supported on a principal surface of the electrode current collector, and having an end face ME continuous with an end face CE of the electrode current collector; and a protective layer partially covering the end face CE of the electrode current collector from a boundary between the electrode current collector and the electrode mixture layer, in the thickness direction of the electrode current collector.
Absstract of: WO2025091090A1
Doped layered cathode materials for an electrochemical device are disclosed, which comprises a layered cathode material and a dopant, wherein the dopant is selected and added so that the electrochemical device delivers a capacity retention of about 78% to about 88% after 500 cycles at 1 C.
Absstract of: EP4804240A1
An electrode for secondary batteries includes a sheet-shaped electrode current collector, a first electrode mixture layer supported on one main surface of the electrode current collector; and a second electrode mixture layer supported on another main surface of the electrode current collector. An end portion of the electrode includes end portions of the first electrode mixture layer and the second electrode mixture layer and an end portion of the electrode current collector. The end portions of the first electrode mixture layer and the second electrode mixture layer each protrude beyond the end portion of the electrode current collector.
Absstract of: EP4803558A1
0001 The present invention relates to: a copolymer comprising a sulfur atom-containing monomer unit, an acrylonitrile-based monomer unit, an acrylate-based monomer unit containing a linear C1-20 alkyl group, and a vinyl acetate-based monomer unit; and a slurry composition, a separator, and a secondary battery comprising same.
Absstract of: EP4804316A1
Provided is a composition for an electrochemical device functional layer with which it is possible to form a functional layer for an electrochemical device that has excellent normal temperature adhesiveness and can reduce internal resistance of an electrochemical device. The composition for an electrochemical device functional layer contains a particulate polymer A. The particulate polymer A has a volume-average particle diameter of not less than 0.75 µm and not more than 17.5 µm, an amount of elution into tetrahydrofuran of not less than 0.05 mass% and not more than 60 mass%, and a storage modulus at 25°C of 35 MPa or less.
Absstract of: EP4804211A1
0001 The solid-state battery according to an embodiment of the present disclosure is provided with a sulfide solid electrolyte including at least Li, Sn, S, and O and having a tetragonal crystal structure.
Absstract of: 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).
Absstract of: WO2025093838A1
The present invention relates to a composition comprising a fluorinated polymer P1 comprising monomer units derived from a fluorinated monomer M1a and a copolymer P2 comprising monomer units derived from a monomer M2a of formula (Ia) R1R2C=C(R3)C(O)R or (Ib) R1R2C=C(R3)R'' and monomer units derived from a monomer M2b of formula (II). The composition is used as an electrode binder.
Absstract of: US20250146981A1
0000 A battery cell inspection system and method are disclosed. The system performs an ultrasound interrogation session of a cell by directing ultrasound at different frequencies at target points across surfaces of the cell, detecting ultrasound at the target points that is transmitted through and/or reflected from the cell, generating response signals from the detected ultrasound at each of the target points, and determining characteristics of the cell including defects, anomalies and cell capacity based upon the response signals. During the session, the transducers are not in contact with the surfaces of the cell, and the transducers and the cell are immersed in an electrically non-conductive fluid. The system can also configure the ultrasound transmitted at the target points into focused beams. Alternatively, an inspection system can be configured to determine characteristics of a cell during a formation stage of the cell.
Absstract of: EP4804307A1
0001 This secondary battery comprises: an electrode body that is obtained by winding a positive electrode and a negative electrode with a separator interposed therebetween; a cylindrical outer can (20) that has a bottom part and that houses the electrode body; a sealing body (30) that closes an opening (24) of the outer can (20); and an annular gasket (40) that is interposed between the outer can and the sealing body (30), the sealing body (30) being fixed by crimping to the opening (24) of the outer can (20) with the gasket (40) interposed therebetween. The secondary battery is characterized in that: the gasket includes a first gasket (41) and a second gasket (42) disposed on the bottom side of the first gasket (41); the sealing body (30) is sandwiched between the first gasket (41) and the second gasket (42) from both sides in the axial direction of the outer can (20); and at least a portion of the first gasket (41) is adjacent to the second gasket (42) in the radial direction of the outer can (20).
Absstract of: EP4803658A1
The present invention relates to: a perforated aluminum foil suitably used for a current collector for a power storage device; and a method for manufacturing same. The present invention provides a method for manufacturing a perforated aluminum foil having a plurality of through-holes penetrating in the thickness direction thereof, the method comprising: an alkaline cleaning step for bringing a first aqueous composition containing 1-10 mass percent inclusive of an alkali into contact with the surface of an aluminum foil; and a through-hole forming step for forming the through-hole in the thickness direction of the aluminum foil by bringing a second aqueous composition containing 1-30 mass percent inclusive of halide ions into contact with the surface of the aluminum foil within 20 minutes after the alkaline cleaning step. Also provided is a perforated aluminum foil having a prescribed breaking strength, average pore diameter, and maximum pore diameter/average pore diameter.
Absstract of: EP4804373A1
0001 An energy storage circuit and a power supply apparatus, belonging to the technical field of power supplies. The energy storage circuit comprises a main positive line, a main negative line, at least one first current limiting component and a battery module connected between the main positive line and the main negative line. The battery module comprises a plurality of battery components which are sequentially connected in series; the plurality of battery components are respectively supported in a one-to-one correspondence by a plurality of support members; the battery components are insulated from the support members; and each first current limiting component is connected between two adjacent support members and is used for limiting the current between the two adjacent support members. Therefore, in case of double-point insulation failures across electrical boxes (support members), the present application reduces short-circuit currents, thus reducing the possibility of causing high-voltage sparking and battery combustion or explosion.
Absstract of: EP4803657A1
According to the present invention, it is possible to provide a method for producing an aluminum perforated foil which has a plurality of through holes penetrating therethrough in the thickness direction, the method including a through hole forming step in which an aqueous composition that contains 1-30 mass% of halide ions and 0.1-20 mass% of an oxidizing agent is brought into contact with the surface of an aluminum foil so as to form the through holes in the thickness direction of the aluminum foil.
Absstract of: EP4804255A1
Disclosed is a negative electrode (12) for secondary batteries, which includes a negative electrode current collector (40) and a negative electrode mixture layer (41) that is formed on the surface of the negative electrode current collector (40). This negative electrode (12) for secondary batteries is characterized in that: the negative electrode mixture layer (41) includes, as a negative electrode active material, a carbon material and an Si-containing material; the negative electrode mixture layer (41) includes, as a conductive agent, a first conductive agent that has a G/D ratio of not less than 20 but less than 65 as determined by Raman spectroscopic measurement, and a second conductive agent that has a G/D ratio of not less than 0.7 but less than 20 as determined by Raman spectroscopic measurement; and the ratio (W2/W1) of the mass (W2) of the second conductive agent to the mass (W1) of the first conductive agent is less than 2.0.
Absstract of: 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.
Absstract of: WO2025091077A1
The present invention provides an apparatus for cooling individual sources of heat disposed at locations on one or more printed circuit board (PCB) assemblies. The apparatus includes a bladder having a plurality of apertures positioned to substantially align with and provide an independent air stream to the location of each individual source of heat, thereby providing targeted forced convection cooling to each individual heat source. The apparatus further includes a source of forced air directed to inflate the bladder and thereby create a flow of air into the bladder that egresses through the plurality of apertures. The bladder has overall dimensions such that when fastened in an arrangement that substantially aligns the apertures with heat sources, the bladder, once inflated, extends over the one or more PCB assemblies in which the heat sources are located and causes substantially uniform air temperature and flow of air egressing through individual apertures.
Absstract of: EP4803225A1
One aspect of the present invention relates to a steel suitable for hot press forming and, more specifically, to an aluminum-based plated steel sheet for hot press forming, a hot press-formed member and manufacturing methods therefor. In addition, another aspect of the present invention relates to: a forming device for forming a high-strength steel; a forming method; a battery case bracket formed thereby; and a battery pack module.
Absstract of: EP4803575A1
The present application belongs to the technical field of separator material preparation, in particular to a microporous membrane, and a preparation method therefor and an application thereof. The microporous membrane includes a polymer and an ionic liquid. Based on a total mass of the microporous membrane, the microporous membrane includes 0.01 wt% - 5 wt% of the ionic liquid, optionally, 0.1 wt% - 5 wt% of the ionic liquid. By introducing an appropriate amount of the ionic liquid into the microporous membrane, the ionic liquid can be continuously or discontinuously adsorbed on surfaces of fibrils inside the microporous membrane. The ionic liquid is adsorbed on the surfaces of the fibrils inside the microporous membrane by means of lipophilic ends of the ionic liquid. This can not only eliminate internal static electricity, but also better avoid the reduction of ionic conductivity, increasing the migration speed of ions in an electrolyte solution, and reducing lithium dendrites. When the microporous membrane of the present application is used as separators of batteries, an appropriate amount of the ionic liquid is added to the microporous membrane, which is conducive to alleviating the problem of static electricity accumulation in the microporous membrane, and meanwhile enables the microporous membrane to have low thermal shrinkage, thereby avoiding the compromise of battery capacity and the occurrence of electrochemical safety issues.
Absstract of: WO2025093132A1
The invention relates to an electrochemical cell assembly (10), comprising a base plate, an end plate (26), a stack (12) comprising a plurality of cell units (14) stacked upon one another, said stack (12) being arranged between said base plate and said end plate, and an electrically conductive power transmission device (38) comprising a connector (40) that is located on a side of the end plate that is facing away from the stack, the power transmission device spanning the end plate and being electrically connected to the stack, wherein the power transmission device is attached to the end plate by a fastening device (42) at a portion of the power transmission device that is located between an electrical connection to the stack and the connector.
Nº publicación: EP4804376A1 09/09/2026
Applicant:
ZHONGTIAN ENERGY STORAGE TECH CO LTD [CN]
Zhongtian Energy Storage Technology Co., Ltd
Absstract of: EP4804376A1
Provided in the present application are a high-voltage box, and an electrical control system and method for an energy storage battery cluster. The high-voltage box comprises a main positive circuit, a main negative circuit and a pre-charging circuit, and further comprises a pre-charging resistor and an integrated switch, wherein the integrated switch is provided with a first contact, a second contact, a third contact and a fourth contact; the first contact is connected to the main positive circuit, and the second contact and the fourth contact are connected in parallel and then connected to the main negative circuit; the pre-charging resistor and the third contact are connected in series in the pre-charging circuit, and the pre-charging circuit is connected across the first contact in parallel; and the first contact and the second contact are interlocked, and the third contact and the fourth contact are also interlocked. The high-voltage box of the present application reduces the number of components, thereby also reducing the cost.
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