Absstract of: US2025233130A1
An electrode having a multilayer structure formed by stacking a plurality of unit electrode active material layers. The electrode is formed from granules comprising an electrode material densely packed in each unit electrode active material layer, and even though different types of electrode active materials are used in each unit electrode active material layer, the intermixing of the electrode active materials does not occur at or near the interface of the unit electrode active material layers, resulting in less interferences of electrochemical properties between the different types of electrode active materials. Additionally, the electrode active material layer has higher porosity of the unit electrode active material layer closer to the electrode surface than the unit electrode active material layer closer to the current collector. Accordingly, it is possible to improve electrolyte wetting and ionic conductivity of the electrode.
Absstract of: US2025233148A1
Disclosed are a negative electrode for a rechargeable lithium battery and a rechargeable lithium battery. The negative electrode includes a current collector; and a negative active material layer, wherein the negative active material layer includes a first active material layer on the current collector and including a first crystalline carbon, a Si—C composite, and a first binder; and a second active material layer on the first active material layer and including a second crystalline carbon, a Si—C composite, and a second binder, a particle diameter of the first crystalline carbon is smaller than a particle diameter of the second crystalline carbon, and based on the total negative active material layer, an amount of the first binder is larger than an amount of the second binder, an amount of the Si is about 3 wt % or more based on 100 wt % of the negative active material layer.
Absstract of: US2025233121A1
An electrode coating device includes a front surface coating part, which is provided on a traveling path of a current collector, for coating a slurry on the front surface of the current collector, a back surface coating part, which is provided on the traveling path, for coating the slurry on the back surface of the current collector passing through the front surface coating part, and a guide roll including a core part having a rotating shaft, and a surface part surrounding the core part and formed of a material different from that of the core part, and transferring the current collector in a state where the back surface of the current collector faces the back surface coating part. A guide roll is also provided.
Absstract of: US2025233133A1
A positive electrode active material including core particles including layered lithium nickel-manganese-based composite oxide, wherein each core particle is a secondary particle formed by agglomerating a plurality of primary particles, and a crystal size of the primary particle is about 105 nm to about 115 nm.
Absstract of: WO2025148724A1
An electrode sheet (10) and a secondary battery. The electrode sheet comprises a current collector (11), a first insulating layer (12), a second insulating layer (13), a first adapter portion (14a) and a second adapter portion (14b), wherein the current collector (11) comprises a first metal layer (112), a polymer layer (111) and a second metal layer (113), which are sequentially arranged, the first metal layer (112) having a first surface (1121) facing away from the polymer layer (111), the second metal layer (113) having a second surface (1131) facing away from the polymer layer (111), and in the widthwise direction of the current collector (11), the current collector (11) comprising a coating section (11a) and an empty foil section (11b), which are connected to each other; the first insulating layer (12) is arranged on the coating section (11a) on the first surface (1121) and extends to the empty foil section (11b); the second insulating layer (13) is arranged on the coating section (11a) on the second surface (1131) and extends to the empty foil section (11b); the first adapter portion (14a) is electrically connected to the current collector (11) on the first surface (1121) of the empty foil section (11b), the distance between the first adapter portion (14a) and the first insulating layer (12) is L1 mm, and 0 mm≤L1≤1 mm; and the second adapter portion (14b) is electrically connected to the current collector (11) on the second surface (1131) of the empty foil section (
Absstract of: WO2025148601A1
A negative electrode material and a preparation method therefor and the use thereof, and a lithium-ion battery. The preparation method for the negative electrode material comprises the following steps: (1) mixing graphitized needle coke, supercritical-fluid-stripped graphene and chitosan to obtain a mixture; and (2) carbonizing the mixture to obtain a negative electrode material. In the method, the graphitized needle coke and the supercritical-fluid-stripped graphene are used in combination with the chitosan, and a graphitized needle coke negative electrode material modified by a graphene two-dimensional laminated structure is obtained by means of solid-phase physical stirring and mixing and carbonization treatment, thereby achieving rapid transport of lithium ions, and providing excellent rate capability and cycle performance.
Absstract of: WO2025148600A1
Disclosed are a graphite negative electrode material, a preparation method therefor and a use thereof, and a lithium-ion battery. The preparation method for the graphite negative electrode material comprises the following steps: (1) dissolving chitosan in a solvent to obtain a chitosan solution, and adding graphite and supercritical fluid-exfoliated graphene into the chitosan solution for mixing to obtain a mixture; and (2) drying the mixture, and then performing carbonization treatment to obtain the graphite negative electrode material.
Absstract of: WO2025148749A1
An insulating adhesive and a secondary battery. The insulating adhesive comprises a first insulating adhesive layer, a second insulating adhesive layer and a third insulating adhesive layer, which are stacked in sequence along a first direction. A degree of swelling of the insulating adhesive when soaked in dimethyl carbonate for 4 hours at room temperature is less than or equal to 5%. Packaging tension between the insulating adhesive and a packaging bag of the secondary battery is high, and a sealing effect is good.
Absstract of: US2025231245A1
A processor of a battery device performs a precharge operation by closing a precharge switch during a precharge duration, closing a positive main switch in response to the precharge operation being complete, and diagnosing the precharge operation based on a voltage of a positive connection terminal measured when the positive main switch is about to be closed and the voltage of the positive connection terminal measured as soon as the positive main switch is closed.
Absstract of: US2025231242A1
A battery managing apparatus according to an embodiment of the present disclosure includes a profile acquisition unit configured to acquire a first profile for each of a plurality of batteries included in a battery pack; and a diagnosis unit configured to calculate a target ratio from each of the plurality of first profiles, calculate each target value as a diagnostic factor based on a plurality of calculated target ratios, generate a distribution profile indicating a correspondence relationship between a plurality of calculated target values and the number of each of the plurality of target values, determine whether the distribution profile satisfies a predetermined condition, and diagnose a state of the battery pack according to a determination result.
Absstract of: US2025230901A1
Methods and structures are disclosed to dispense a liquefied gas solution from a liquefied gas solution (LGE) container. The LGE container comprises a temperature sensor to detect the temperature of the liquefied gas solution within the LGE container. The LGE container temperature is controlled using a temperature control element and a processor connected to the temperature sensor and to the temperature control element. The LGE is transferred from the container into a secondary container through a valve. The method includes the following steps: (a) opening the valve to allow the LGE to flow from the LGE container into the secondary container; (b) taking readings from the temperature sensor; and (c) based on the temperature readings, heating the LGE container to maintain the temperature of the LGE container at a predetermined temperature or within a predetermined temperature range.
Absstract of: US2025234675A1
Systems, methods, and articles for a portable power case are disclosed. The portable power case is comprised of at least one battery and at least one PCB. The portable power case has at least two access ports and at least one USB port. The portable power case is operable to supply power to an amplifier, a radio, a wearable battery, a mobile phone, and a tablet. The portable power case is operable to be charged using solar panels, vehicle batteries, AC adapters, non-rechargeable batteries, and generators. The portable power case provides for modularity that allows the user to disassemble and selectively remove the batteries installed within the portable power case housing.
Absstract of: US2025234115A1
A power tool having multiple wireless communication states and a method of wirelessly communicating by a power tool. The power tool includes a motor, a battery pack interface that selectively receives a battery pack, a backup power source, and a wireless communication controller coupled to the backup power source and the battery pack interface. The wireless communication controller operates in a connectable state when coupled to a battery pack and transmits tool operational data to the external device and receives tool configuration data from the external device. The wireless communication controller operates in an advertisement state when the wireless communication controller is coupled to and powered by the backup power source. In the advertisement state, the wireless communication controller is configured to transmit the unique tool identifier. The external device may also display an indication of the communication state of the power tool.
Absstract of: WO2024052451A1
The present invention relates to a battery module wherein the electric cells are potted into a potting material and the potting material is obtained by mixing (a) one or more organic polyisocyanates, (b) one or more polymeric compounds having at least two isocyanate-reactive hydrogen atoms, (c) 0.5 to 15 wt.-%, based on the total weight of components a) to f), of one or more chain extenders, comprising O-H- chain extenders (c1) and aromatic diamine curing agents (c2), (d) optionally one or more cross linkers, (e) one or more aromatic diamine curing agents, (f) one or more catalysts, (g) 2 to 20 wt.-% based on the total weight of components a) to g), of one or more flame retardants, (h) at least one blowing agent and (i) optionally fillers and/or polyurethane additives, to give a reaction mixture and allow the reaction mixture to cure. The present invention is further directed to a method of producing a battery module wherein the electric cells are potted into a potting material and the potting material is obtained by inserting a reaction mixture according to the invention into the spaces between the adjacent electric cells of a battery case having the electric cells arranged within and allowing the reaction mixture to cure.
Absstract of: EP4585947A1
The present disclosure discloses a current detection method, a capacity prediction method, and a screening method for battery self-discharge, a device and a medium. In the current detection method for battery self-discharge, a battery is charged with a tiny current by a regulated power supply under a preset condition. During a charging process, a charging current provided by the regulated power supply is adjusted until a voltage of the battery remains stable. When the voltage of the battery to be tested remains stable, the charging current is determined as a self-discharge current of the battery under the preset condition.
Absstract of: EP4585353A1
A cutting apparatus (10) for producing an electrode film (E0, 101, 102) usable for producing electrical energy storage devices starting from an incoming film (F1, F1', F1"), comprising a continuous movement device (11) and a cutting unit (14), wherein said cutting unit (14) comprises two laser head devices (17) configured to each generate and focus a respective laser beam (FL) along a desired optical axis (Z), each laser head device (17) comprising two optical movement devices (21) configured to receive and direct the respective laser beam (FL) in such a way as to hit said incoming film (F1, F1', Fl"), and at least one control unit (22a, 24a) configured to control said two optical movement devices (21) so as to selectively move said laser beam (FL) hitting said film (F1, F1', F1") along two respective axes (X, Y) perpendicular to each other and also to said optical axis (Z), so that said two laser head devices (17) in combination are able to continuously perform notching cutting and singularization of said film (F1, F1', F1") in the same passage.
Absstract of: EP4586348A1
An apparatus (10) for stacking monocells (100) for producing electrical energy storage devices, each consisting of electrode films (101, 102), and at least one separator (103) interposed between them (101, 102), The apparatus (10) comprises a transport member (13) which receives a stack (12) of monocells (100) and a collection device (14) provided with a support member (15) movable along a functional axis (F) between a collection position, in which it is within the overall dimensions of one of the monocells (100), and a rest position, in which it is outside the overall dimensions of that monocell (100), and a movement member (16) selectively movable, independently of the support member (15), along a stacking axis (S) between a support position, in which it cooperates with the support member (15), and at least one release position, in which it positions the monocells (100), in cooperation with the transport member (13).
Absstract of: EP4585457A1
A battery pack for generating a synchronization signal according to an embodiment disclosed herein includes one or more battery modules including a plurality of battery cells capable of supplying power to a motor of a vehicle and a battery management system electrically connected to another battery management system of another battery pack, in which the battery management system is configured to transmit a designated first synchronization signal to the other battery pack before performing a designated task, and receive a designated second synchronization signal from the other battery pack, determine a reference synchronization signal based on the first synchronization signal and the second synchronization signal, and perform the designated task based on the reference synchronization signal.
Absstract of: US2025198044A1
A system or method to fabricate a nano surface on a conductive device, including a high voltage DC power source, a pulse generator connected to the power source, a fluid container, in which the electrolyte solution is placed and a cathode and an anode. The anode may be the conductive device and the anode and cathode are connected to the pulse generator with both being positioned within the fluid container and submerged in the electrolyte solution. The delivery of nanosecond pulses of electricity to the electrodes nanosurface the conductive material. The disclosure further includes methods to create a nano surface or texture on a conductive device having for example the steps of cleaning or pretreating the conductive device.
Absstract of: CN119816956A
The present disclosure provides methods and systems for recycling and upgrading reconstituted waste battery cathode materials. In some embodiments, the method may include separating cathode material of a spent battery into a plurality of sets of particles, where a first set of the plurality of sets of particles includes first particles having a first size and a second set of the plurality of sets of particles includes second particles having a second size. The method further includes generating a first precursor solution using the first set of particles; generating a second precursor solution using the second set of particles; generating a first cathode material using the first precursor solution; and generating a second cathode material using the second precursor solution.
Absstract of: WO2024054684A1
A method for discharging end-of-life batteries prior to dismantling and recycling involves recovering residual stored electrical energy by draining the battery to a zero charge state, and reverse biasing the battery to bring the potential from a zero charge state of around 2.7 V to a zero or near zero energy state. The reverse bias inverts the normal usage polarity for inducing a reverse current flow, and continues based on formation of internal short circuits formed on the cathode current collector for rendering the battery with little to no energy storage for safe agitation and dismantling.
Absstract of: CN119816475A
A method comprising: providing a metal salt solution comprising nickel, cobalt, manganese, aluminum, or a combination thereof; the metal salt solution is combined with an alkaline solution, where the combination of the metal salt solution and the alkaline solution is maintained at a pH of not greater than 10 to form a metal hydroxide precursor. To form the cathode active material, the method further includes adding a lithium compound to the metal hydroxide precursor to form a metal hydroxide precursor mixture; and heat treating the metal hydroxide precursor mixture to form the single crystal cathode active material.
Absstract of: CN119836698A
The present invention relates to a binder composition for a positive electrode comprising a polymer P1 containing repeating units derived from vinylidene fluoride and a hydrophilic polymer P2 containing repeating units derived from at least one monomer of formula R1R2C = C (R3) C (O) R (I) wherein R1, R2 and R3 are independently selected from H and C1-C5 alkyl; r is selected from-NHC (CH3) 2CH2C (O) CH3,-NR 'R "or-OR', where R 'and R" are independently selected from H and C1-C18 alkyl optionally substituted by one or more hydroxyl, thiol or amino functional groups or five to six membered heterocycles comprising at least one nitrogen atom in the ring, characterized in that the hydrophilic polymer P2 has a weight average molecular weight greater than 30000 g/mol, advantageously greater than 50000 g/mol, preferably greater than 65000 g/mol, more preferably greater than 80000 g/mol.
Absstract of: WO2024052473A1
According to an embodiment a method is disclosed for designing a heat sink (500- 508) comprising a container with means to guide a coolant from an inlet (100) to an outlet (200) designed to exchange heat with a component comprising the steps of generating a first mesh (600) comprising elements defining a discretized shape of a container in a massive state; generating a heat map of the container by imposing a thermal load of the component thereon thereby identifying thermal spots; repeatedly solving fluid flow equations and energy equations imposed on the first mesh through a topology optimization method by minimizing the heat sink (500-508) thermal resistance and/or maximizing the heat sink thermal uniformity; wherein the method further comprises the step of imposing a channel (400-402) on the first mesh (600) by connecting the inlet (100) with the outlet (200) via the thermal spots thereby identifying obstacles (300-302) within the first mesh (600) for the coolant; and wherein the solving step is up front performed on elements associated with the channel.
Nº publicación: EP4584829A1 16/07/2025
Applicant:
SPECIALTY OPERATIONS FRANCE [FR]
SPECIALTY OPERATIONS FRANCE
Absstract of: CN119856287A
The invention relates to an electrode powder composition, to a method for the production thereof and to the use thereof for producing electrochemical cell parts.