Resumen de: US2025205823A1
A secondary battery electrode plate processing jig apparatus is provided and an electrode plate processing method using the same is also provided. The secondary battery electrode plate processing jig apparatus includes: a base portion; a rotating plate rotatably installed on an upper portion of the base portion; a driving portion that provides a rotational driving force to the rotating plate; and a plurality of clamping portions installed on the rotating plate. Each of the clamping portions is configured to clamp an electrode plate such that the electrode plate can be transported to a plurality of processing positions. A controller controls each of the clamping portions to clamp electrode plates according to a process of the electrode plate and control the driving portion to rotate the rotating plate according to the process.
Resumen de: US2025205820A1
A method for welding a multi-layer aluminum foil of a current collector of a battery onto a corresponding structure includes performing a laser welding operation. The laser welding operation includes a spot welding operation of welding the multi-layer aluminum foil and the corresponding structure to each other using laser pulses. The corresponding structure is located under the multi-layer aluminum foil in a stacking direction of the multi-layer aluminum foil.
Resumen de: US2025205818A1
The laser welding system can have: a laser welder having an emitter configured to emit the laser beam, and a scanning head optically coupled to the laser emitter; a robot having an end effector having a body, a resilient member having a first end mounted to the body and a second end opposite the first end, a pressing element at the second end of the resilient member, and a laser aperture extending across the body, the resilient member and the pressing element; and wherein the laser beam can be directed across the laser aperture by the scanning head when either one of the pole regions is pressed against a corresponding one of the electrical poles by the pressing element.
Resumen de: US2025205817A1
The present invention provides a laser welding device, which irradiates laser to perform welding so that an electrode lead and an electrode tab sequentially pass through an opening hole of a base plate and an opening hole of an upper mask when the electrode lead and the electrode tab are seated on a lower mask in a state in which a laser irradiator, the base plate, and the upper mask are coupled to each other, the laser welding device including: the base plate provided with a coupling tool that protrudes from one surface thereof; and the upper mask provided with a coupling hole through which the coupling tool enters and coupled to the base plate by coupling the coupling tool to the coupling hole, wherein the coupling tool comprises a cylinder which has a hollow shape therein in a longitudinal direction and in which an air hole is punched, a piston which is capable of being slid inside the cylinder in a state of being coupled to a spring and has a section of which a diameter is reduced toward one side thereof, and a ball coupled to the cylinder, and when the coupling hole enters the inside of the coupling hole, the ball enters a groove formed in an inner circumferential surface of the coupling hole by the piston so as to be prevented from being separated, wherein, when air is injected into the air hole, the piston is slid to separate the ball from the groove.
Resumen de: US2025210813A1
Provided are a spacer for a battery cell, a battery cell, a battery pack, and a vehicle. The spacer includes a spacer body having an accommodation groove. The accommodation groove has a gap formed at a bottom wall of the accommodation groove. The gap is in communication with the accommodation groove. The gap is adapted for a tab of the battery cell to pass through the gap to enable the tab to be partially accommodated in the accommodation groove. The spacer body has a width D, and the gap has a width d, where 3*d≤2*D.
Resumen de: US2025210809A1
The present invention relates to the technical field of separators, and in particular to a composite oil-based separator and a preparation method therefor. The composite oil-based separator comprises a base film and a moisture retention coating applied on at least one side surface of the base film, wherein the moisture retention coating comprises an inorganic filler, a bonding polymer, and a moisture retention polymer. The composite oil based separator in the present invention is provided with the moisture retention coating, so that a layer structure having moisture can be formed on the surface of the base film, thereby reducing the electrostatic intensity of the composite oil based separator; thus, when the separator is applied to a battery cell and wound, wrinkling would not occur.
Resumen de: US2025210812A1
A battery has a protection member applied between an electrode assembly and a beading portion. The battery includes an electrode assembly; a battery housing having an opening formed on one side to accommodate the electrode assembly through the opening and including a beading portion formed by press-fitting the perimeter of an outer circumference at the opening; a top cap configured to cover the opening; and a first protection member interposed between the beading portion and the electrode assembly.
Resumen de: US2025210811A1
A power storage device includes a safety valve in a case member made of metal. The case member has a valve periphery roughened portion around the safety valve on a case inner surface The power storage device includes a blockage preventing resin protrusion that is a protrusion made of resin and protruding to the inside. The blockage preventing resin protrusion is joined to the valve periphery roughened portion and reduces the possibility of a piece of the electrode body blocking the safety valve. Nanocolumns stand numerously on the valve periphery roughened portion, and the blockage preventing resin protrusion is joined to the valve periphery roughened portion such that a resin material fills gaps between the nanocolumns standing numerously.
Resumen de: US2025210807A1
A composite separator including an adhesive layer and a secondary battery including the same. In the composite separator, the adhesive layer contains a particulate organic binder having a glass transition temperature of 60 to 80° C., and when the adhesive layers are brought into contact with each other, pressurized at a temperature of 50° C. and a pressure of 1.7 MPa for 2 hours, and then peeled at a speed of 300 mm/min and an angle of 180°, blocking does not occur between the adhesive layers, and an adhesive strength to a positive electrode is 5 gf/cm or more.
Resumen de: US2025210617A1
A method for manufacturing a battery cell comprising manufacturing C cathode electrodes by coating first and second cathode active material layers on opposite sides of C cathode current collectors, and applying first and second seal coatings on the C cathode current collectors to surround the first and second cathode active material layers, respectively. The method includes manufacturing A anode electrodes by coating first and second anode active material layers on opposite sides of A anode current collectors; and applying first and second seal coatings on the A anode current collectors to surround the first and second anode active material layers, respectively. The method includes arranging S separators between the C cathode electrodes and the A anode electrodes to form a battery cell stack, where C, A and S are integers greater than one.
Resumen de: US2025210649A1
A novel positive electrode active material is to be provided. In addition, a battery with favorable charge and discharge characteristics is to be provided. The battery includes a positive electrode, and the positive electrode includes a positive electrode active material including lithium cobalt oxide. The lithium cobalt oxide contains magnesium, aluminum, and nickel, and when the concentration of cobalt in the lithium cobalt oxide measured from XPS analysis is represented as 1, the magnesium concentration (Mg/Co) is higher than or equal to 0.50 and lower than or equal to 0.90; and the half width of a Mg1s peak is higher than or equal to 1.0 eV and lower than or equal to 2.6 eV.
Resumen de: US2025210647A1
Disclosed herein a process for preparing a cathode active material of Formula (I) LiNixCoyMnzO2, including steps of: i) preparing a precursor of hydroxides or carbonates of Ni, Co and Mn; ii) mixing the precursor obtained from step i) with a source of Li; and iii) calcining the mixture obtained from step ii), where step iii) includes multi-step calcination, where x is in a range of from 0.80 to 0.95 and preferably from 0.80 to 0.92, y is in a range of from 0.01 to 0.15 and preferably from 0.01 to 0.12, and z is in a range of from 0.01 to 0.15 and preferably from 0.01 to 0.12, and the sum of x, y and z is 1.
Resumen de: US2025210642A1
Disclosed herein is a process for making an electrode active material for lithium-ion batteries. The process includes the steps of(a) providing a cathode active material (α) that has the general formula Li1+x1TM1−x1O2,(b) providing another cathode active material (β) that has the general formula Li1+x2TM1−x2O2, and(c) combining cathode active material (α) and cathode active material (β) in a mass ratio in the range of from 1:5 to 5:1.
Resumen de: US2025210643A1
A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is a composite oxide which is represented by general formula LixTMtmMyO2-fFf and has a crystal structure that belongs to the space group Fm-3m; and in the general formula, TM represents a transition metal, M represents a non-transition metal, and if Q=2×tm×(1−(1−f/2)5), Q<1 is satisfied. With respect to a dV/dq-SOC curve showing the relationship between the state of charge SOC and dV/dq of a half cell that contains this composite oxide, the dV/dq-SOC curve being obtained by charging the half cell with a charging current of 0.1 C at 25° C. to an end voltage within the range of 4.7 V to 4.95 V, there is one or more peaks within the SOC range from 10% to 40%.
Resumen de: WO2025130394A1
The present application relates to the technical field of lithium battery electrode sheets, and provides a positive electrode sheet and a battery. The positive electrode sheet comprises a positive electrode current collector, a positive electrode active material layer and a protective layer; a positive electrode lug is arranged at one end of the positive electrode current collector in a first direction; the positive electrode active material layer is arranged on one side surface or two side surfaces of the positive electrode current collector; and the protective layer is arranged on one side surface or two side surfaces of the positive electrode current collector and located between the positive electrode active material layer and the positive electrode lug, wherein the positive electrode active material layer is provided with first recessed areas, the protective layer is provided with a second recessed area, and the first recessed areas and the second recessed area are all provided with pits. According to the positive electrode sheet, by forming the recessed area in the protective layer, the problem of being unable to form a recessed area on the outermost edge of a positive electrode active material layer due to strip running deviation, positioning deviation or unstable electrode sheet slitting width and the like is avoided, the problem of edge lithium precipitation under a high-rate charging system is mitigated, the cycle performance and the capacity retention rate of the b
Resumen de: WO2025130004A1
The present application relates to the technical field of batteries, and in particular to a positive electrode sheet, a preparation method for a positive electrode sheet, and a lithium-ion battery. To address the problem of poor rate capability of existing lithium-ion batteries, the applied improvement is as follows: a positive electrode sheet and a positive electrode material layer satisfy a relational expression 3.0<η*D50<10, where η is the porosity of the positive electrode sheet, and D50 is a corresponding particle size when a cumulative particle size distribution of the positive electrode material layer is 50%. By means of the improvement above, the positive electrode sheet has higher rate capability and a longer cycle life.
Resumen de: WO2025130381A1
The present application provides an electrochemical device and an electronic device. The electrochemical device comprises an electrode assembly and an electrolyte. The electrode assembly is of a winding structure and comprises curved parts and a straight part, wherein the maximum length of the straight part is L mm, the maximum radius of each curved part is D mm, and 5≤L/D≤10. The electrolyte contains a compound represented by a formula (I), wherein, on the basis of the mass of the electrolyte, the content percentage by mass of the compound represented by the formula (I) is A%, and 30≤A≤80. By means of combining the regulation and control of L/D of the electrode assembly with the the regulation and control of components of the electrolyte, the present application improves the high-temperature cycle performance of the electrochemical device.
Resumen de: WO2025129906A1
The present application discloses a battery and a battery pack. The battery comprises a case, a pole group, an explosion-proof valve, and a pressure relief channel; the battery satisfies that: S1≥αCV and S2≥(αCV)2γ/S1, wherein S2 is the equivalent cross-sectional area of the pressure relief channel, γ is the actual equivalent cross-sectional area coefficient of the pressure relief channel, S1 is the total area of the explosion-proof valve, α is the actual area coefficient of the explosion-proof valve, C is the capacity of the battery, and V is the rated voltage of the battery.
Resumen de: US2025204676A1
A wirelessly locatable tag may include a first housing member defining a first exterior surface of the tag, a second housing member removably coupled to the first housing member and defining a second exterior surface of the tag, and an antenna assembly. The antenna assembly may include an antenna frame defining a top surface and a peripheral side surface, a first antenna on the antenna frame along the peripheral side surface and configured to communicate with the electronic device using a first wireless protocol, a second antenna on the antenna frame along the peripheral side surface and configured to send a localization signal to the electronic device using a second wireless protocol different than the first protocol, and a third antenna on the antenna frame along the top surface and configured to communicate with the electronic device via a third wireless protocol different than the first and second protocols.
Resumen de: US2025208218A1
A computer system for estimating a terminal voltage of a battery cell of a battery is provided. The terminal is electrically connected to another object (such as another battery cell) via e.g. a cell-to-cell busbar. Processing circuitry is configured to obtain a voltage drop across at least the battery cell and at least part of the busbar; obtain a voltage correction value from a model of voltage drop across the busbar, and estimate the terminal voltage based on the voltage drop corrected by the voltage correction value.
Resumen de: US2025208227A1
The purpose of the present invention is to provide a battery degradation state estimation method with which it is possible to highly accurately detect degradation due to reduction in battery capacity, and also provide a degradation suppression control method and a degradation suppression control system which are for suppressing degradation by using data of a result obtained by said battery degradation state estimation method. The present invention is configured to comprise: a degradation state estimation unit including a resistance value history acquisition unit that acquires a resistance value history of a battery in discharging for a predetermined time during traveling of a vehicle, and a degradation calculation unit that calculates the degradation state of the battery from the resistance value history of the battery; and a degradation suppression control unit for performing control on degradation suppression of the battery on the basis of the degradation state of the battery.
Resumen de: US2025208228A1
The battery ECU updates the frequency data of the area having the temperature and SOC of the battery as parameters, and estimates the degree of degradation (amount of degradation) from the frequency data and the degradation coefficient that increases as the temperature increases. When the battery is replaced, the battery ECU obtains an estimated full charge capacity value of the replaced battery, and calculates a degree of degradation of the replaced battery from a difference from the full charge capacity at the time of the new battery. Then, new frequency data is created based on the degree of degradation. The new frequency data is created as frequency data of an area having a high temperature and a large SOC, and the other area is null.
Resumen de: US2025205808A1
A first pressure bonding roller 110 and a second pressure bonding roller 112 have a cylindrical shape. A first metal foil 200 and a second metal foil 202 are inserted between the first pressure bonding roller 110 and the second pressure bonding roller 112. The first metal foil 200 and the second metal foil 202 are pressure bonded by a rotation of the first pressure bonding roller 110 and the second pressure bonding roller 112. The first pressure bonding roller 110 includes a D-cut surface at least in a portion of the cylindrical shape. A protrusion is provided in each of two boundaries between a side surface and the D-cut surface of the cylindrical shape in the first pressure bonding roller 110.
Resumen de: US2025210806A1
An ion selective layer includes a water-soluble organic polymer, a cross-linker, a water-soluble inorganic salt or hydroxide, and water. A method of making the ion selective layer includes dissolving a water-soluble organic polymer in water, dissolving a water-soluble inorganic salt or hydroxide in water, dissolving a cross-linker in water, cross-linking the water-soluble polymer, forming a layer by casting onto a substrate, and drying the water solution to form a film. Another method of making the ion selective layer includes dissolving a water-soluble organic monomer in water, dissolving a water-soluble inorganic salt or hydroxide in water, dissolving a cross-linker in water, dissolving an initiator in water, polymerizing and cross-linking the water-soluble monomer, forming a layer by casting onto a substrate, and drying the water solution to form a film.
Nº publicación: US2025210808A1 26/06/2025
Solicitante:
ZEON CORP [JP]
ZEON CORPORATION
Resumen de: US2025210808A1
A slurry composition for a non-aqueous secondary battery functional layer contains a particulate polymer having a glass-transition temperature within a specific range and a binder A including an alkali metal salt group and either or both of a hydroxy group and an acidic functional group.