Absstract of: US2025316685A1
A positive electrode active material for a lithium secondary battery comprises a core component with a lithium transition metal oxide and a coating layer on the core component's surface. The material meets the condition 0.5<A/B<0.8, where A is the normalized intensity of the L3 high peak in a Ni L3-edge spectrum of the positive electrode active material, and B is the normalized intensity of the L3 high peak in a Ni L3-edge spectrum of the core component. The invention includes a positive electrode for a lithium secondary battery, comprising the described active material and a sulfide-based solid electrolyte, and optionally a conductive material. Additionally, a lithium secondary battery comprises the positive electrode active material. The manufacturing method involves preparing the core component, mixing it with a coating precursor to form a starting material, and thermally treating the starting material to form the positive electrode active material, ensuring the condition 0.5<A/B<0.8 is met.
Absstract of: US2025316695A1
A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the negative electrode are provided. The negative electrode includes a dry negative active material layer including a negative active material and a polytetrafluoroethylene binder that includes a N-including protection layer.
Absstract of: US2025316687A1
An active material for negative electrode and a sodium ion battery are provided. The active material for negative electrode includes a core material and a first ion-conducting modification layer. The core material is a carbon material. The first ion-conducting modification layer is disposed on a surface of the core material. A material of the first ion-conducting modification layer includes sodium titanium oxide.
Absstract of: US2025316778A1
A master jig device for a secondary battery foreign matter inspection device configured to inspect whether a foreign matter inspection device is operating normally. The master jig device includes a jig body having a shape corresponding to a secondary battery; a magnetic force supply part on at least one of one side or another side in the longitudinal direction of the jig body and configured to generate a magnetic force; a current collection part outside the magnetic power supply part; and a to-be-inspected member fixed to the outside of the current collection part by the magnetic force of the magnetic force supply part and that is configured to be measured as foreign matter by a foreign matter inspection device.
Absstract of: US2025316776A1
A battery system and a battery communication system thereof, are provided by the present invention. The battery communication system includes: at least one monitoring chip, a controller and at least one radio frequency coupler. The monitoring chip is connected to at least one battery cell. The radio frequency coupler is disposed adjacent to the monitoring chip, or disposed between the monitoring chip and the controller.
Absstract of: US2025316774A1
A secondary battery includes an electrode assembly and a housing accommodating the electrode assembly. The electrode assembly includes a positive electrode plate having a positive current collector and a primer coating applied on a surface of the positive current collector. Along a winding direction of the electrode assembly, the primer coating includes a first primer coating and a second primer coating. A positive active material layer is located on a surface of the first primer coating. The second primer coating is disposed on at least a part of a surface of an outermost turn of the electrode assembly. The positive active material layer is not disposed on a surface of the second primer coating. A raised region and a recessed region are disposed on the second primer coating. An area of the raised region accounts for 50% to 80% of an area of the second primer coating.
Absstract of: US2025316771A1
An apparatus for manufacturing a dry electrode, a method for manufacturing a dry electrode, and a dry electrode manufactured thereby are disclosed. The apparatus may include: a dry mixture supply part, a dry binder, and a dry conductive material, where the dry mixture supply part may include a feeding shutter to adjust a width of an opening through which the dry mixture is supplied; an extrusion part to form an electrode active material layer including a first coated portion, a second coated portion, and a third coated portion including a film formed from the dry mixture, where the electrode active material layer may further include an uncoated portion, which is an empty area and defined between the first coated portion and the third coated portion; a lamination part to laminate the electrode active material layer on an electrode current collector; and a sensor part to recognize the uncoated portion.
Absstract of: US2025316772A1
A cylindrical secondary battery includes: a cylindrically wound electrode assembly including a plurality of positive electrode plates, a plurality of negative electrode plates, and a plurality of separators insulating the positive electrode plates and the negative electrode plates from each other; a can accommodating the electrode assembly; and a cap plate coupled to an open end of the can and sealing the can.
Absstract of: US2025316682A1
A dry electrode and a manufacturing method thereof are disclosed. The method includes preparing a first positive electrode active material Lia1Fex1B1-x1PO4-b1, a second positive electrode active material Lia2Nix2COy2Dz2O2-b2, a dry binder, and a dry conductive material; grinding the dry binder at 10° C. or less; forming a first mixture by mixing a first portion of the first positive electrode active material, the second positive electrode active material, the dry conductive material, and the grinded dry binder; forming a second mixture by mixing a second portion of the first positive electrode active material with the first mixture; forming a positive electrode active material layer by forming a film from the second mixture; and performing a lamination of the positive electrode active material layer on a positive electrode current collector.
Absstract of: US2025316677A1
Proposed is a roll-to-roll manufacturing method of electrodes for secondary batteries including material supplying for supplying an electrode material from an unwinder, meander correcting for correcting meandering in a movement path of the electrode material, notching processing for forming an electrode tab shape by processing a tab fabrication area of the electrode material, cleaning the electrode material, vision inspection for determining whether the electrode material is of good quality, and electrode material winding for winding the electrode material with a rewinder.
Absstract of: US2025316683A1
A ternary blended positive electrode material and a preparation method thereof and a battery are provided. The preparation method includes mixing a ternary material, a lithium manganese iron phosphate material and a coating material, and performing high-energy ball milling on the obtained mixture to obtain the ternary blended positive electrode material. The coating material includes a polyphosphazene intermediate.
Absstract of: US2025316679A1
The present disclosure provides a negative electrode plate for a lithium battery and a lithium-ion secondary battery comprising same. The negative electrode plate includes a negative electrode current collector and a negative electrode material, wherein the negative electrode material includes: a negative electrode active material including a silicon-based material or a mixture of graphite and silicon-based material; a conductive agent; and a polyacrylic acid-based binder having a pH of 4.5 to 8.5 and a viscosity of 3500 Pa·s to 30000 Pa·s.
Absstract of: US2025316675A1
A dry electrode manufacturing apparatus includes a plurality of rollers that laminate fine powder onto a current collector by calendaring the fine powder into a free standing film. A plurality of trimming knives adjust a film width of the free standing film passing by at least one roller among the plurality of rollers. A vision portion photographs a surface of the current collector on which the free standing film is laminated. A controller controls positions of the trimming knives based on the film width of the free standing film laminated onto the surface of the current collector.
Absstract of: US2025316770A1
A method for preparing a laminated battery cell is provided. The method comprises steps of: providing a negative electrode sheet, a positive electrode sheet, and a membrane; thermally bonding the negative electrode sheet and the positive electrode sheet to the membrane to form a thermally bonded structure; forming a plurality of folding structures in the thermally bonded structure, wherein i positive electrode sheets are arranged between every two adjacent folding structures, and i is a positive integer; folding the thermally bonded structure along each straight line where each of the folding structures is located to prepare the laminated battery cell. In the present disclosure, the folded position is fixed, so that the alignment of the positions on both sides of each electrode sheet during folding is improved, and subsequent investment and process of a shaping equipment are eliminated.
Absstract of: US2025316768A1
Disclosed herein is a thermal composite laminated cell comprising a negative electrode, a plurality of positive electrodes, and a separator, the separator comprising a first separator and a second separator, the negative electrode being attached to and between the first separator and the second separator to form a composite laminate comprising a plurality of body portions and a plurality of bending portions arranged alternately and continuously, the bending portions being provided with partially cut structures, the positive electrodes each being arranged between adjacent body portions in a thickness direction of the negative electrode, a projection in the thickness direction of the positive electrode falling completely within a planar area of the body portions. The present application overcomes the problem of poor alignment of the existing composite laminated cell, and has the advantages of good alignment and stable performance.
Absstract of: US2025316769A1
The disclosure provides a thermal composite laminated cell and a method for preparing the thermal composite laminated cell. The thermal composite laminated cell includes N negative electrode sheets, M positive electrode sheets, and a separator, N is greater than M, and a value of a difference between N and M is 1; the separator includes a plurality of body parts and bending parts alternately and continuously arranged; the negative electrode sheets and the positive electrode sheets are alternately stacked in a thickness direction of the negative electrode sheets, adjacent one of the negative electrode sheets and one of the positive electrode sheets are separated by one of the body parts, the bending parts are provided with incomplete-cut-off structures, and the separator is folded at the incomplete-cut-off structures; two outermost negative electrode sheets are single-sided electrode sheets, and other negative electrode sheets are double-sided electrode sheets.
Absstract of: US2025316767A1
A thermally-compositing laminated cell and a preparation method of a thermally-compositing laminated cell are provided. The cell includes a plurality of first electrode plates, a plurality of second electrode plates and a separator. The polarity of each of the first electrode plates and the polarity of each of the second electrode plates are opposite, and the separator includes a plurality of body portions and a plurality of bending portions disposed alternately and continuously. Along a thickness direction of each of the first electrode plates, the first electrode plates and the second electrode plates are alternately stacked, one of the first electrode plates and one of the second electrode plates adjacent to each other are separated by one of the body portions, and each of the bending portions is provided with an incomplete-cut-off structure, and the separator is folded at the incomplete-cut-off structure.
Absstract of: US2025316673A1
An apparatus for manufacturing a battery includes: a measurement module configured to measure physical properties of an electrode plate in a pressing process in which the electrode plate coated with a coating material is pressed by a pressing roll, and including a first measurement unit and a second measurement unit; and a processor configured to receive first physical properties of the electrode plate before pressing and second physical properties of the electrode plate after pressing from the first and second measurement units, respectively, and to determine a change in physical properties of the coating material caused by stretching of the electrode plate in the pressing process, wherein the change in physical properties of the coating material caused by the stretching of the electrode plate functions as a factor for defining a capacity of a battery to be manufactured.
Absstract of: US2025316672A1
A negative electrode manufacturing device for a secondary battery includes a dual slot die having an upper block, a middle block, and a lower block, a first slot provided through a gap between the upper and middle blocks and a second slot provided through a gap between the middle and lower blocks. The first and second slots discharge a first negative electrode slurry. The device further includes a coating roll opposite the first and second slots that transfers an electrode sheet coated with the negative electrode slurry discharged from each slot. The upper block, the middle block, and the lower block include an upper lip, a middle lip, and a lower lip forming an outlet at a front end of each block. The upper and lower lips exhibit a magnetism of a same polarity, and the middle and upper lips exhibit a magnetism having an opposite polarity.
Absstract of: US2025316992A1
A charge management system of a secondary battery with a novel structure is provided. The charge management system includes the secondary battery including a first battery cell and a second battery cell which are connected in series, a current measurement circuit having a function of measuring current flowing through the first battery cell and the second battery cell in charge of the secondary battery, a voltage measurement circuit having a function of measuring a voltage of each of the first battery cell and the second battery cell in charge of the secondary battery, and a control circuit having a function of performing control for making a charge rate of the first battery cell equal to that of the second battery cell. The control circuit has a function of calculating data exhibiting battery characteristics in accordance with current data and voltage data measured in each of the first battery cell and the second battery cell. The control for making the charge rate of the first battery cell equal to that of the second battery cell is performed by controlling the charge rates so that local maximum values of the data exhibiting battery characteristics are equal to each other.
Absstract of: US2025317000A1
This charge/discharge control device is used in a power storage system having a plurality of storage batteries, the charge/discharge control device comprising: a storage battery information acquisition unit that acquires storage battery information including a degree of health of each of the plurality of storage batteries; an overall command value acquisition unit that acquires a first charge/discharge electric power command value indicating a charge/discharge electric power requested for the power storage system overall; and a command value calculation unit that, on the basis of the degree of health, calculates a second charge/discharge electric power command value indicating a charge/discharge electric power allocated to each of the storage batteries from within the first charge/discharge electric power command value.
Absstract of: US2025316757A1
A solution comprising a solvent, a fluorinated polymer and an alkali or alkali earth metal salt wherein the fluorinated polymer is a partially unsaturated poly(alkylene) polymer.
Absstract of: US2025316773A1
A secondary battery includes: a stacked-type electrode body including first electrode plates, second electrode plates, and a separator. The separator includes a zigzag-bent part bent in a zigzag manner, and a wound part wound to an outer periphery of a part where the first and second electrode plates and the zigzag-bent part are stacked. The separator includes a start end part and a terminal end part that is positioned at a winding terminal end of the wound part. The zigzag-bent part includes a first bent part and a second bent part. The separator includes an extension part positioned on a side of the start end part relative to the zigzag-bent part, and disposed between the second bent part and the wound part. In the stacking direction of the first and second electrode plates, outer surfaces of both electrode plates positioned at the outermost surface sides are covered with the separator.
Absstract of: US2025316775A1
Examples of the present disclosure relate to a separator for a rechargeable lithium battery, and a rechargeable lithium battery including the separator, and are directed to providing a separator for a rechargeable lithium battery. The separator includes a porous substrate and a coating layer located on at least one surface of the porous substrate. The coating layer includes a binder and a filler, the filler includes a core-shell particle as a first particle, the core includes an organic component having a melting point lower than a melting point of the porous substrate, and the shell includes an inorganic component having a melting point higher than the melting point of the organic component.
Nº publicación: US2025316783A1 09/10/2025
Applicant:
MAHLE INT GMBH [DE]
MAHLE International GmbH
Absstract of: US2025316783A1
An expansion tank for a battery cooling system may include a tank housing composed of a plastic, a first receptacle, a dryer cartridge positively received in the first receptacle, a first valve via which air is released from the expansion tank into an environment when there is excess pressure in the expansion tank, and a second valve via which fresh air from the environment enters the expansion tank when there is a vacuum in the expansion tank. The tank housing may include a first shell and a second shell connected to the first shell. The first receptacle may be disposed in at least one of the first shell or the second shell.