Resumen de: US2025286239A1
An electrode assembly including: an electrode plate stack including a plurality of electrode plates stacked in a first direction; and a tab stack including a plurality of electrode tabs extending from the electrode plates from among the plurality of electrode plates having the same polarity as each other in a second direction perpendicular to the first direction, and having at least one open trench extending downward through an end thereof. A lower electrode tab located at a lower side from among the plurality of electrode tabs is exposed through the open trench in an adjacent upper electrode tab located at an upper side from among the plurality of electrode tabs.
Resumen de: US2025286240A1
The present disclosure relates to a secondary battery manufacturing apparatus and a secondary battery manufacturing method that are capable of adjusting a bending position and angle of a lead tab and improving energy density of a secondary battery. To this end, the present disclosure provides an secondary battery manufacturing apparatus, including a support member configured to support a lead tab including an electrode tab extending from an electrode assembly and an electrode lead connected to the electrode tab, a first bending member spaced apart from the support member and configured to press the electrode lead such that a first bending part is formed on the electrode lead, and a second bending member connected to the support member and configured to move the support member such that a second bending part is formed on the electrode tab.
Resumen de: US2025286155A1
A battery cell comprises: an electrode assembly, comprising: a positive electrode plate comprising a positive electrode current collector and a positive electrode active material layer at least located on the surface on one side of the positive electrode current collector; a negative electrode plate comprising a negative electrode current collector; a separator located between the positive electrode plate and the negative electrode plate; and an insulating member located at one end of the negative electrode plate and/or the positive electrode plate that is not covered by the separator.
Resumen de: US2025286210A1
A thermal runaway protection system for a battery can include a divider wall, a protection structure, and a piston. The divider wall can be adjacent to a battery module enclosure. The protection structure can be attached to the battery module enclosure. The piston can be disposed in the protection structure, where a first piston end is in fluid communication with an enclosure interior space of the battery module enclosure via a pressure hole, and where a second piston end is proximate to or attached to the divider wall. The system can include a spring pushing the piston towards an untriggered position to control a triggering pressure. The system can include a set of lock pawls to retain a triggered position of the piston during a thermal runaway event while creating an air gap between the battery module enclosure and the divider wall.
Resumen de: US2025286065A1
Methods of making an artificial solid electrolyte interphase protected anode, including steps of: a) applying a fluoropolymer film to a lithium metal surface to form a coated lithium metal surface, b) applying pressure to the fluoropolymer film on the coated lithium metal surface, c) subsequent to step b), dissolving at least part of the fluoropolymer film on the coated lithium metal surface in a solvent; d) applying pressure to the at least partially dissolved fluoropolymer film on the coated lithium metal surface of step c); and e) evaporating the solvent to form the artificial solid electrolyte interphase protected anode. An anode formed by the method and cells and batteries employing the anode.
Resumen de: US2025286049A1
An electrochemical device includes a positive electrode plate and an electrolyte. The electrolyte includes a compound represented by Formula I:where a is an integer from 1 to 5, the compound represented by Formula I contains at least 4 fluorine atoms, based on a total mass of the electrolyte, a mass percentage of the compound represented by Formula I in the electrolyte is A %, and 7≤A≤72. The positive electrode plate includes a positive current collector, a first material layer and a second material layer, the first material layer is disposed between the positive current collector and the second material layer, a coating mass of the first material layer is x mg over an area of 1540.25 mm2, a coating mass of the second material layer is y mg over an area of 1540.25 mm2, and 15.4≤y/x≤2530.
Resumen de: US2025286076A1
An embodiment of this application provides a current collector and a preparation apparatus thereof, an electrode plate, a battery, and an electrical device. The current collector includes a main region and a tab region disposed along a first direction. The main region includes a first metal. The first metal includes at least one of Ni, Fe, or stainless steel. The tab region includes a second metal. The second metal includes at least one of Cu, Ag, Au, or W, and optionally includes Cu.
Resumen de: US2025286073A1
A positive electrode additive includes a polymer represented by Formula I, where, n≥162, m≥300, and a number-average molecular weight of the polymer represented is 6.7×104 to 2×108. The positive electrode additive possesses a high molecular polarity, high flexibility, a relatively low glass transition temperature, high adhesiveness, a high oxidation resistance, and a high conductivity. When applied to the positive electrode plate, the positive electrode additive can increase the cohesive force of the positive electrode material layer and reduce the expansion rate of the positive electrode plate, so that a secondary battery with a relatively high energy density can be obtained at a relatively low compaction density.
Resumen de: US2025286078A1
Disclosed is an electrode. The electrode may include a current collector and an electrode layer disposed on at least one surface of the current collector. The electrode layer may include a cutting surface having a concave and convex shape.
Resumen de: US2025286105A1
An electrode assembly manufacturing apparatus includes a notcher configured to notch a part of a non-coated portion of an electrode plate, such that the non-coated portion of the electrode plate includes a plurality of tab regions connected to each other by a residual non-coated portion region, the plurality of tab regions extending perpendicularly outward from a coated portion of the electrode plate regions to be between the coated portion of the electrode plate and the residual non-coated portion, a winder configured to receive the electrode plate from the notcher and to wind the electrode plate into a wound structure, and a cutter configured to receive the wound structure from the winder and to cut out the residual non-coated portion from the wound structure.
Resumen de: US2025286235A1
Provided are a battery module and a battery pack. The battery module includes multiple battery cells, multiple first connection members and multiple second connection members. A battery cell has an end surface, and the end surface is provided with a tab. The multiple first connection members and the multiple second connection members are flexible members. A first connection member has a first connection portion, a second connection portion and a bend. Two ends of the bend are connected to the first connection portion and the second connection portion, separately. The multiple battery cells are disposed in a superimposed manner. The first connection portion is connected to tabs of two adjacent battery cells. The second connection member is connected between second connection portions of two adjacent first connection members, the first connection portion and the second connection portion are superimposed on the end surface.
Resumen de: US2025286154A1
Embodiments described herein relate to electrochemical cells with dendrite prevention mechanisms. In some aspects, an electrochemical cell can include an anode disposed on an anode current collector, a cathode disposed on a cathode current collector, the cathode having a first thickness at a proximal end of the cathode and a second thickness at a distal end of the cathode, the second thickness greater than the first thickness, a first separator disposed on the anode, a second separator disposed on the cathode, an interlayer disposed between the first separator and the second separator, the interlayer including electroactive material and having a proximal end and a distal end, and a power source electrically connected to the proximal end of the cathode and the proximal end of the interlayer, the power source configured to maintain a voltage difference between the cathode and the interlayer below a threshold value.
Resumen de: US2025286192A1
A battery module, including: an electrode body; a housing that covers a periphery of the electrode body; a protruding member that is disposed protruding from the electrode body and that is interposed in the housing; and an impact mitigation part at a position at which the housing and the protruding member face each other, the impact mitigation part mitigating an impact caused by a collision between the housing and the protruding member.
Resumen de: US2025286219A1
Composite separators and secondary batteries are disclosed. In an embodiment, a composite separator includes a porous substrate and an adhesive layer formed on an outermost layer of at least one surface of the porous separator. The adhesive layer includes first organic particles with a first average particle diameter (D50) and a first glass transition temperature and second organic particles with a second average particle diameter (D50) and a second glass transition temperature. The first glass transition temperature is lower than the second glass transition temperature, and the first average particle diameter is smaller than the second average particle diameter, and the first organic particles and the second organic particles satisfy a specific relation.
Resumen de: US2025286067A1
This disclosure relates to a composite particle for a negative electrode in lithium secondary batteries. The composite includes a polymer with functional groups such as hydroxy, carboxyl, acrylate, amine, amide, or imide, and a rubber containing an epoxy group. These components are cross-linked and combined with an active material like silicon or silicon oxide. The composite may also incorporate conductive materials like carbon nanotubes or graphite. The preparation method involves pretreating rubber, forming a slurry with the polymer, active material, and conductive material, and then spray drying. This composite is used to enhance the performance of negative electrodes in lithium batteries.
Resumen de: US2025286066A1
A silicon-based anode water-soluble binder, a preparation method and an application thereof are provided. Raw materials of the silicon-based anode water-soluble binder of include a high molecular polymer and a low-molecular-weight organic acid. Taking the low-molecular-weight organic acid as a crosslinking agent, the silicon-based anode water-soluble binder can form a mutually crosslinked network structure by simultaneous polymerization of covalent ester bonds and non-covalent hydrogen bonds through in-situ esterification, providing more active sites for silicon anode and bonding, effectively inhibiting the volume expansion of the silicon anode during the charge-discharge cycle, further improving the electrochemical performance of the lithium-ion battery, and building a crosslinking network structure with multi-gradient energy dissipation, and then the prepared negative electrode pole piece and secondary battery have excellent electrochemical performance.
Resumen de: US2025286043A1
A negative electrode plate includes a negative electrode current collector, as well as a first active substance layer and a second active substance layer disposed on at least one surface of the negative electrode current collector. In a thickness direction of the negative electrode plate, the second active substance layer is disposed between the negative electrode current collector and the first active substance layer. The first active substance layer includes a first active material and a first binder, the first active material includes a first silicon material, and the first binder includes a PAA binder. The second active substance layer includes a second active material and a second binder, the second active material includes a second silicon material, and the second binder includes an SBR binder. A mass percentage of the first silicon material is P1, and a mass percentage of the second silicon material is P2, where P2<P1.
Resumen de: US2025286081A1
A current collector may include a porous three-dimensional framework and a lithiophilic substance, where the lithiophilic substance may be distributed in pores of the porous three-dimensional framework. The current collector may include a first side used to face the separator, and a second side facing away from the first side. In a direction from the first side to the second side, the porous three-dimensional framework may include a first part and a second part, the thickness of the lithiophilic substance in the pores of the first part being less than the thickness of the lithiophilic substance in the pores of the second part. The thickness of the lithiophilic substance in the current collector may gradually increase in a thickness direction of the porous three-dimensional framework.
Resumen de: US2025286227A1
A power storage device includes: an electrode including: a current collector having a surface; and a positive active material layer provided on the surface of the current collector; and a sealing member provided on the surface of the current collector, the sealing member surrounding the positive active material layer in a stacking direction. The current collector includes: a first metal foil including the surface; a second metal foil provided opposite to the positive active material layer with respect to first metal foil; and an adhesive layer provided between the first metal foil and the second metal foil, the adhesive layer bonding the first metal foil and the second metal foil with each other. The sealing member includes: a seal portion welded to the surface; and another seal portion welded to a side face of the current collector including a side face of the adhesive layer.
Resumen de: US2025286103A1
A battery cell of a secondary battery can include an electrode assembly; a cell case accommodating the electrode assembly; and a pair of electrode leads protruding outwards from the cell case, wherein the pair of electrode leads include a first electrode lead including a material that is the same as a material of a plate configured to connect the battery cell to another battery cell in series or parallel; and wherein the pair of electrode leads include a second electrode lead including a material that is different from the material of the first electrode lead.
Resumen de: US2025286164A1
A method produces a battery arrangement which has a battery tray having a tray bottom and a battery received in the battery tray, wherein the battery lies on the battery tray at support points spanning a support plane and wherein, before the battery is inserted into the battery tray, a thermal compound is applied to the tray bottom and/or to the battery bottom in order to fill, at least in part, a gap between a battery bottom facing the tray bottom and the tray bottom. Before the thermal compound is applied, a distance between the tray bottom and the support plane is determined at least at first measurement points and the thermal compound is applied to the tray bottom and/or the battery bottom in a quantity which is dependent on the determined distances between the tray bottom and the support plane.
Resumen de: US2025286233A1
An adapter for connecting to a plurality of battery terminal configurations of a battery is disclosed. The adapter may include a bracket with a body portion and opposing flanges on opposing edges of the body portion. The bracket may be configured for mounting to a rear portion of the battery. The adapter may include a first connecting busbar and a second connecting busbar, both mounted longitudinally on the body portion and spaced apart. The adapter may include a first sliding busbar and a second sliding busbar, each configured to slidably mount within a slot of the respective connecting busbar. Each sliding busbar may include at least one terminal coupling surface configured to couple to a battery terminal. The adapter may include a pair of first cable connectors and a pair of second cable connectors, each configured to attach to an operative end of the respective connecting busbar.
Resumen de: US2025286224A1
An secondary battery includes an electrode assembly, where the electrode assembly is a wound structure. The electrode assembly includes a positive electrode plate, a negative electrode plate, a first separator, and a second separator. The negative electrode plate is located between the first separator and the second separator. The first separator includes a first base film and a first bonding layer, the second separator includes a second base film and a second bonding layer, the first bonding layer includes a first binder, and the second bonding layer includes a second binder. The first base film is a non-woven fabric film, and the first binder includes at least one of polyvinylidene fluoride or polyvinylidene fluoride-hexafluoropropylene copolymer. The second base film is a microporous film, and the second binder includes at least one of polyimide, polyvinyl alcohol, or sodium carboxymethyl cellulose.
Resumen de: US2025286048A1
Methods of forming a composite material film can include providing a mixture comprising a carbon precursor and silicon particles. The methods can also include pyrolysing the carbon precursor to convert the precursor into one or more types of carbon phases to form the composite material film such that the precursor has a char yield of greater than about 0% to about 60% and the composite material film comprises the silicon particles at about 90% to about 99% by weight.
Nº publicación: US2025286042A1 11/09/2025
Solicitante:
SK ON CO LTD [KR]
SK ON CO., LTD
Resumen de: US2025286042A1
A cathode for a lithium secondary battery includes a cathode current collector, and a cathode active material layer on the cathode current collector. The cathode active material layer includes a plurality of a lithium-metal oxide particle that has a shape of a single particle. An activation energy (Ea) of the cathode is in a range from 50 KJ/mol to 80 KJ/mol.