Absstract of: US2025337132A1
A method for producing a secondary battery according to the present invention comprises a step wherein a negative electrode collector, which has a projection having a height of from 0.36 mm to 0.45 mm on at least one of a first member and a second member, said members constituting the negative electrode collector, is resistance-welded with a core multilayer part in such a manner that the core multilayer part is sandwiched between the first member and the second member, while having the projection in contact with the core multilayer part.
Absstract of: US2025337349A1
The present application relates to the field of photovoltaic storage and charging technology, and specifically to a photovoltaic energy storage system, including at least two modularized chambers; a power conversion system coupled to a DC bus, and at least one of a photovoltaic module, an energy storage module, and a DC charging module; where the power conversion system is disposed in one of the modularized chambers; and at least one of the photovoltaic module, the energy storage module, and the DC charging module is disposed in another of the modularized chambers.
Absstract of: US2025337075A1
A battery pack includes a base plate, battery cells supported by the base plate, extending in a first direction, and arranged in a second direction crossing the first direction, a side member supported by the base plate and disposed on one side of the battery cells in the first direction, and a plate including a portion disposed between adjacent battery cells of the battery cells and in contact with the battery cells and a partial area disposed between the battery cells and the side member and in contact with the side member.
Absstract of: US2025337117A1
A battery cell, a battery, an electric apparatus, and an energy storage apparatus are provided. The battery cell includes a housing and at least one electrode assembly disposed within the housing. The housing is shaped as a right parallelepiped and defined by three mutually perpendicular dimensions: W1, T1, and H1. The housing comprises six walls: opposing first and second walls along the W1 direction, opposing third and fourth walls along the T1 direction, and opposing fifth and sixth walls along the H1 direction. The sum of the thicknesses of each pair of opposing walls is denoted as a, b, and c, respectively. The effective internal volume ratio of the housing satisfies (W1−a)×(T1−b)×(H1−c)/(W1×T1×H1)≥90%. This configuration enhances the volumetric energy density of the battery cell while maintaining the same chemical material system.
Absstract of: US2025337115A1
A separator includes a substrate, an inorganic coating layer, and an adhesive layer, where the inorganic coating layer and the adhesive layer are disposed on a first surface of the substrate. The inorganic coating layer is disposed between the substrate and the adhesive layer. The adhesive layer is disposed on a second surface of the substrate. The inorganic coating layer includes filler particles. The adhesive layer includes polymer particles. The separator includes a first surface provided with the inorganic coating layer and the adhesive layer. In a region with an area of 100 μm2 on the first surface, a quantity of the polymer particles is A, where 10≤A≤100. An average particle size of the filler particles is Dv50−1 μm, and an average particle size of the polymer particles is Dv50−2 μM, WHERE Dv50−1 AND Dv50−2 SATISFY 0.2≤Dv50−1/Dv50−2≤2.5 AND 0.2≤Dv50−1≤1.
Absstract of: US2025337266A1
A charging device for wirelessly charging an electrical energy store of a mobile terminal has an air channel, a support that adjoins the air channel, a contact face, an energy transmission unit for wirelessly transmitting energy to the contacted mobile terminal, at least one temperature sensor designed to measure air temperature flowing in the air channel, and a charging controller connected to the energy transmission unit that controls at least one charging parameter. The charging device is designed to control the transmission of energy from the energy transmission unit to the contacted mobile terminal based on the temperature measured by the temperature sensor.
Absstract of: US2025336972A1
A negative electrode for a secondary battery includes: a current collector; a first negative electrode active material layer formed on the current collector and containing a first active material; and a second negative electrode active material layer formed on the first negative electrode active material layer and containing a second active material. The second active material is a bimodal active material including small particles and large particles having different particle sizes, a particle size (D2) of the second active material is smaller than a particle size (D1) of the first active material, and the particle size of the second active material is an average particle size of the small particles and the large particles.
Absstract of: US2025336968A1
A positive electrode for a rechargeable lithium includes a current collector. A first active material layer is provided on the current collector, and the first active material layer includes first particles, second particles, a first binder, and a first conductive material. A second active material layer is provided on the first active material layer, and the second active material layer includes third particles, a second binder, and a second conductive material. The first particles contain an olivine structured compound, the second particles contain a layered compound, the third particles contain an olivine structured compound, the first particles are single particles, and the first particles have an average diameter of about 100 nm to about 2 μm. The first active material layer and the second active material layer have a cobalt (Co) content of less than about 100 ppm. An average diameter of the second particles is greater than the average diameter of the first particles. The third particles are single particles, and the third particle have an average diameter of about 100 nm to about 2 μm.
Absstract of: US2025336969A1
A positive electrode for a rechargeable lithium battery includes a current collector, a first active material layer on the current collector, with the including first particles, second particles, a first binder, and a first conductive material. The positive electrode also includes a second active material layer on the first active material layer, the second active material layer including third particles, a second binder, and a second conductive material. The first particles are an olivine structured compound, the second particles are a layered compound, the third particles are an olivine structured compound. The first particle includes a plurality of first primary particles aggregated together, the first particles have an average diameter of about 3 μm to about 10 μm, and the first primary particles have an average diameter of about 200 nm or less. The third particles are single particles, and the third particles have an average particle diameter of about 100 nm to about 2 μm.
Absstract of: US2025336965A1
A positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the positive electrode are provided. The positive electrode includes a current collector, a first positive electrode active material layer on the current collector, and a second positive electrode active material layer on the first positive electrode active material layer. The first active material layer includes a first particle represented by Formula 1 and having the form of a single particle, and a second particle represented by Formula 2. The second positive electrode active material layer includes a third particle represented by Formula 3 and having the form of a single particle. The first particle is present in a greater content (e.g., amount) than the second particle.
Absstract of: US2025333315A1
The present disclosure relates to a negative electrode active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. The negative electrode active material for a rechargeable lithium battery includes a composite of silicon and amorphous carbon, and a closed pore increase rate according to Equation 1 is in a range of 20% to 100%.Closedporeincreaserate=(A-B)×100Equation1in Equation 1, A denotes a sum of an increase rate of closed pores and an increase rate of open pores of the negative electrode active material according to a first measurement method, and B denotes the increase rate of open pores of the negative electrode active material according to a second measurement method.
Absstract of: US2025333327A1
A positive electrode active material includes a first positive electrode active material including a first lithium cobalt-based oxide doped with aluminum and magnesium, and a second positive electrode active material including a second lithium cobalt-based oxide doped with aluminum and magnesium. An average particle diameter (D50) of the second positive electrode active material is less than an average particle diameter (D50) of the first positive electrode active material. The first positive electrode active material and the second positive electrode active material each include an aluminum coating layer on particle surfaces, with the aluminum coating layer of the first positive electrode active material being in a form of a shell that continuously surrounds the particle surfaces. An aluminum content based on 100 at % of cobalt and aluminum as measured by energy profiling energy dispersive spectroscopy (EP-EDS) on the surface of the first positive electrode active material is about 6 at % to about 10 at %.
Absstract of: US2025333320A1
The present disclosure is directed to systems and methods of producing lithium carbonate. The lithium carbonate can be produced by contacting a lithium precursor with a carbon dioxide gas. The lithium carbonate produced from this method can include micron-sized lithium carbonate particles with nano-sized lithium carbonate particles coated on a surface of the micron-sized lithium carbonate particles.
Absstract of: US2025333311A1
A negative electrode material has a core-shell structure. The shell includes a carbon layer, the core includes porous carbon and silicon particles distributed in the pores of the porous carbon, and the negative electrode material has a weight-gain peak between 400° C. and 900° C. on a derivative thermogravimetric curve of the negative electrode material.
Absstract of: US2025333321A1
The present disclosure is directed to systems and methods of producing lithium carbonate. The lithium carbonate can be produced by contacting a lithium precursor with a carbon dioxide gas. The lithium carbonate produced from this method can include micron-sized lithium carbonate particles with nano-sized lithium carbonate particles coated on a surface of the micron-sized lithium carbonate particles.
Absstract of: US2025337119A1
A separator comprises a separator body and a polymer layer disposed on at least one surface of the separator body, wherein the polymer layer comprises a liquid-retaining polymer. The liquid-retaining polymer is added to a first solvent at 70° C. to form a polymer system, the polymer system is left to stand at 70° C. for 8 h, and after standing at 25° C. for more than or equal to 24 h, the polymer system is filtered by means of a 200-mesh filter screen, thereby leaving a first substance, wherein the mass of the liquid-retaining polymer is q, the unit thereof being g; the mass of the first substance is m, the unit thereof being g; and the liquid-retaining polymer and the first substance satisfy: 5≤m/q≤1000. The bonding force of the separator is greater than or equal to 10 N/m.
Absstract of: US2025337088A1
A battery system includes: a battery pack including a plurality of battery cells, each having a pair of electrode terminals and a venting valve at a terminal side thereof, the terminal side of each of the battery cells facing a first side of the battery pack in a Z-direction; a cell contacting unit (CCU) carrier on the terminal side of the battery cells; and a plurality of busbars on the electrode terminals of the battery cells and being in mechanical contact with the CCU carrier. The busbars including an elastic member configured to exert a clamping force onto the CCU carrier.
Absstract of: US2025337095A1
A cell, a battery, and an electric device. The cell includes a can and an electrode assembly. The can has a first wall portion with N vent mechanisms arranged along a first direction. The electrode assembly, housed in the can, includes a body portion and a tab. The body portion has a plurality of consecutively arranged sub-regions. The tab is located at least at one end of the body portion along the first direction. The body portion has a length L, with each sub-region having a length L1, satisfying L=L1×N, L≥400 mm, and N≥2. Each vent mechanism is aligned with one corresponding sub-region in the thickness direction of the first wall. Each vent mechanism discharges a medium generated by thermal runaway in its corresponding sub-region, enabling fast and localized venting. This improves the timeliness of pressure relief and enhances cell reliability.
Absstract of: US2025337086A1
A battery and a power-consuming device are provided. The battery includes a load-bearing bracket and a plurality of battery modules. The battery modules are mounted to the load-bearing bracket, and at least one of the battery modules is detachably mounted. This configuration allows for flexible installation and replacement of battery modules, improving serviceability and adaptability of the battery system in the power-consuming device.
Absstract of: US2025337087A1
A battery pack is provided and includes: an outer housing, defining a receiving cavity; a battery group, received in the receiving cavity; at least one reinforcing layer, disposed at a discharging end of the battery group, wherein the at least one reinforcing layer defines a plurality of channel holes; and a fixation adhesive, filled in the receiving cavity, wherein the fixation adhesive wraps the reinforcing layer and the battery group.
Absstract of: US2025337122A1
This application provides a separator, including a first base film and a second base film, where a melting point of the second base film is lower than a melting point of the first base film; puncture strength of the second base film is 220 gf-460 gf, and puncture strength of the separator is 330 gf-620 gf. When the puncture strength of the first base film and the puncture strength of the separator are within the above ranges, the reliability of a secondary battery can be improved.
Absstract of: US2025337027A1
The present disclosure relates to a preventive battery discharge system for a battery system. The battery discharge system comprises an interface for receiving a thermal runaway indication signal for a first battery cell assembly and an energy sink device, wherein the energy sink device is connectable with a plurality of battery cell assemblies by a switching unit, wherein the energy sink device is configured to receive electrical energy discharged from at least one second battery cell assembly. The battery discharge system further comprises a control module configured to identify the at least one second battery cell assembly to be discharged based upon the thermal runaway indication signal and is configured to control the switching unit to discharge the at least one second battery cell assembly and to transport energy from the at least one second battery cell assembly to the energy sink device after receiving a thermal runaway indication signal.
Absstract of: US2025337038A1
Embodiments of the present application provide a control method for a refrigeration system, related devices, and a storage medium, involving battery cooling technology. The method includes: in a case that a current ambient temperature being within a first preset temperature range is determined, a water pump of the refrigeration system and a compressor of the refrigeration system are activated; in a case that a first pressure corresponding to the refrigeration system reaching a preset pressure value is determined, a fan of the refrigeration system is activated, so as to maintain a pressure of the refrigeration system within a preset pressure range for cooling a battery; in a case that the current ambient temperature being within a second preset temperature range is determined, the water pump of the refrigeration system is activated, and activation of the compressor and the fan is prohibited.
Absstract of: US2025337023A1
An embodiment of the present disclosure provides an electrode plate including: a substrate; an active material layer on at least a portion of one surface of the substrate and having a multi-stage end portion; and a protective member on at least a portion of the multi-stage end portion of the active material layer and on the substrate such that the protective member does not protrude past the active material layer in a thickness direction.
Nº publicación: US2025337110A1 30/10/2025
Applicant:
HUIZHOU EVE POWER CO LTD [CN]
EVE POWER CO LTD [CN]
HUIZHOU EVE POWER CO., LTD,
EVE POWER CO., LTD
Absstract of: US2025337110A1
The present disclosure provides a composite separator, a wound core, and a lithium-ion battery. The composite separator includes a porous substrate and a porous active layer; the porous active layer is arranged on at least one face of the porous substrate and includes a base coating and a non-binder polymer C embedded in the base coating, and the base coating includes inorganic particles A and a binder polymer B; the non-binder polymer C has a particle size D50 greater than a thickness of the base coating; a coverage rate of the non-binder polymer C is in a range of 2%-50%; and an average compression ratio P of the non-binder polymer C protruding from the base coating is in a range of 20%-50%.