Abstract: Provided are a granulation additive and a preparation method for high-reliability lithium-ion batteries using the same. The preparation method involves adding a granulation additive into a cathode material for batteries. The granulation additive is a water-soluble polyether resin obtained through ring-opening polymerization of an organic compound A under the action of an organic weak base B serving as an initiator and a solvent C. The granulation additive possesses high adhesive strength and good electrical conductivity, and can function as a flexible binder and be used in conjunction with conventional binders. During the granulation process, the granulation additive has binding and granulating effects, rounds the cathode powder particles and improves the uniformity of the cathode powder.

Abstract: Provided are a capacitor electrode sheet, a preparation method therefor, and a capacitor using the same. The capacitor electrode sheet includes an electrode active material layer and a conductive adhesive layer composited with the electrode active material layer. The capacitor electrode sheet possesses good conductivity and mechanical properties, and can enhance the energy density and cycling stability of the capacitors using the same.

Abstract: The present application discloses a button battery. The button battery includes a case, a positive electrode powder piece, and a current collector. The case includes a positive electrode case and a negative electrode case interconnected. The positive electrode case and the negative electrode case are connected to define a cavity. The positive electrode powder piece is disposed in the cavity. The current collector is disposed in the cavity, the current collector and the positive electrode powder piece are stacked, and at least a part of the current collector is embedded into the positive electrode powder piece. A side of current collector away from the positive electrode powder piece is contacted with a bottom of the positive electrode case.

Abstract: Provides are a thick-electrode cathode sheet, a preparation method therefor and a primary battery. The method includes: first, mixing a cathode active material, a conductive agent, and a binder resin to obtain a mixed material; and subjecting the mixed material to fibrillation treatment to obtain a fibrillized mixed material; then subjecting the fibrillized mixed material and a granulating agent to granulation treatment to obtain a precursor material; and finally, subjecting the precursor material to rolling and film-formation treatment to obtain the thick-electrode cathode sheet.

Abstract: A button battery is provided in the application, and includes a positive electrode case, a negative electrode case and a sealing sleeve. The positive electrode case includes a support portion and a corner portion connected to an outer side of the support portion. The corner portion includes a first turning segment having a first curvature radius and a second turning segment having a second curvature radius. The second turning segment is connected between the support portion and the first turning segment. The negative electrode case includes a covering portion and a bending snap-engage portion having a third curvature radius. The covering portion and the support portion are disposed oppositely. The sealing sleeve is sandwiched between the corner portion and the bending snap-engage portion, so as to enable sealing between the positive electrode case and the negative electrode case.

Abstract: A button battery and a method of assembling the button battery are provided by the present disclosure. The button battery includes a positive electrode cap assembly, a positive electrode current collector, and a positive plate. The positive electrode cap assembly includes a positive electrode cap and a gasket. The gasket includes a gasket part and an elastic plate part intersected with each other. At least one of the elastic plate part and the gasket part is provided with a protruding structure. The protruding structure passes through the through hole and is fixed to the positive plate.

Abstract: A top cover assembly includes a cover component and a top cover component. The cover component includes a cover plate and a pole, the cover plate is connected to an opening of a housing, the cover plate is provided with a first through hole, one end of the pole is located on an inner side of the cover plate and is electrically connected to a tab of a cell, and the other end of the pole extends from the first through hole to an outer side of the cover plate. The top cover component includes a first connector, a positive temperature coefficient thermistor (PTC), and a top cover that are sequentially connected in a direction facing away from the housing, and the first connector is located above the cover plate and is electrically connected to the pole.

Abstract: Provided are a lithium primary button cell, a preparation method thereof, and an electronic device. The lithium primary button cell includes a cell housing (10) and a cell core assembly located within the cell housing (10). The cell core assembly includes a negative electrode (3), a negative electrode modification film (4), separators (5, 6), and a positive electrode (7) that are stacked sequentially. The surface of one side of the negative electrode (3) facing the negative electrode modification film (4) is formed with a concave groove (9) into which the negative electrode modification film (4) is tightly embedded. In the present application, the structure and materials of the lithium primary button cell are optimized so that the lithium primary button cell can have excellent discharging performance and good stability and reliability.

Abstract: A button battery is provided in the present application. The button battery comprises: a first substrate, a first annular wall, and a sealing member. The first annular wall is arranged around a periphery of the first substrate and forms an accommodating cavity with the first substrate, and at least a part of the sealing member is located on a side, away from the accommodating cavity, of the first annular wall. A second housing includes a second substrate and a second annular wall. The second substrate is configured to cover and seal the accommodating cavity, and the second annular wall is connected to a periphery of the second substrate.

Abstract: Provided are a battery structure and a battery pack. The battery structure includes a first housing and a battery assembled within the first housing, a second housing, and a capacitor assembled within the second housing. A positive terminal of the battery is provided with a first positive output member, and a cover plate of the battery serves as a negative terminal of the battery. A positive terminal of the capacitor is provided with a second positive output member, and a negative terminal of the capacitor is provided with a negative output member.

Abstract: A button battery, a method of manufacturing a gasket, and a method of assembling the button battery are provided by the present disclosure. The button battery includes a positive electrode cap assembly, a positive electrode current collector, and a positive plate. The positive electrode cap assembly includes a positive electrode cap and a gasket. The gasket includes a gasket part and an elastic plate part intersected with each other. At least one of the elastic plate part and the gasket part is provided with a protruding structure. The protruding structure passes through the through hole and is fixed to the positive plate.

Abstract: A positive-electrode sheet for a capacitor includes a first active substance layer. The first active substance layer comprises a positive-electrode active material, a carbon electrode material, a positive-electrode conductive agent, and a positive-electrode binder. A method of manufacturing the positive-electrode sheet for the capacitor includes: mixing the positive-electrode active material, the carbon electrode material, the positive-electrode conductive agent and the positive-electrode binder to obtain a positive-electrode material; and processing and molding the positive-electrode material to obtain the first active substance layer. An ultrathin supercapacitor includes a case and an upper cover body that is insulated from and connected to the case.

Abstract: Provided are a method and apparatus for calibrating contact parameters of electrode materials, and a computer storage medium. The method includes the following operations. A discrete element simulation test is performed on an electrode material based on a calibration model and calibration ranges of contact parameters of the electrode material when an axial force-displacement curve of a target pellet of the electrode material meets an adaption condition of the contact model; then a simulated axial pressure-axial strain relationship of the electrode material is acquired based on a target discrete element simulation parameter of the electrode material; whether the contact parameters are calibrated successfully is judged based on this relationship; and when the contact parameters are calibrated successfully, calibration results of the contact parameters are determined.

Abstract: The present disclosure provides a current collection pin, a cover assembly, and a battery cell. The battery cell includes the cover assembly. The cover assembly includes a cover plate provided with a mounting hole, a pole inserted through the mounting hole and connected to the cover plate through an insulating seal, and the current collection pin. The current collection pin includes a body, and a slot body is provided on an outer peripheral surface of the body. An end of the body is connected to the pole.

Abstract: The present disclosure provides a cover assembly and a battery cell. The battery cell includes the cover assembly. The cover assembly includes a current collection pin, a cover plate provided with a mounting hole, a pole inserted through the mounting hole and connected to the cover plate through an insulating seal, and a positioning bracket sleeved on at least one the pole and the current collection pin. The current collection pin includes a body, and a slot body is provided on an outer peripheral surface of the body. One end of the body is connected to the pole.

Abstract: An extrusion head (1) for molding a pole piece and a molding device comprising same, and a molding method and a preparation method therefor. The extrusion head (1) comprises an extrusion head (1) housing, and a through extrusion channel (6) is provided inside the extrusion head (1) housing in an extrusion direction; and the extrusion channel (6) is divided into a transition cavity (61) and a molding cavity (62) that are in sequential butt joint and communication in the extrusion direction, and the diameter of the annular surface of the inner wall of the transition cavity (61) is gradually reduced in the extrusion direction.

Abstract: A positive electrode sheet material, a positive electrode sheet, and a battery are provided. The positive electrode sheet material includes a positive active material, a conductive agent, and a binder. The positive active material includes manganese dioxide having a specific surface area in a range of 10 g/cm2 to 26 g/cm2. The conductive agent includes a first conductive agent having a specific surface area in a range of 10 g/cm2 to 60 g/cm2.

Abstract: The present application provides a charge level early warning method for composite battery packs, comprising: performing voltage test and/or current test on at least two groups of composite battery packs formed by connecting lithium-thionyl chloride batteries and capacitors in parallel, wherein the voltage test is used for obtaining the correlation between the state of charge of the lithium-thionyl chloride batteries and stable voltages, and the current test is used for obtaining the correlation between the state of charge of the lithium-thionyl chloride batteries and the maximum output current; and monitoring the composite battery packs on which charge level early warning is to be performed, and performing early warning according to a voltage, and/or performing early warning according to a current.

Abstract: A battery comprising a shell and a roll core disposed within the shell, the shell including a shell body and an end cap component, one end of the shell body being provided with an opening, another end of the shell body being provided with a sealing portion, the opening being plugged by the end cap component, the roll core including a first tab and a second tab, the end cap component being provided with a pressure-relief structure, an outside wall of the sealing portion being provided with a first terminal and a second terminal at intervals, the first terminal and the second terminal being insulatively disposed, the first tab being connected to the first terminal, and the second tab being connected to the second terminal.

Abstract: The present application relates to a negative electrode plate and a lithium metal battery. The lithium metal battery includes a steel can; a core disposed inside the steel can, the core is formed by winding a positive electrode plate, a separator, and a negative electrode plate, the negative electrode plate is made of lithium metal, and a metal reinforcement structure is embedded in the negative electrode plate; a negative electrode tab, a first end of the negative electrode tab is connected to the negative electrode plate, and a second end of the negative electrode tab is welded to an inner wall of the steel can; a positive electrode tab, a first end of the positive electrode tab is connected to the positive electrode plate; a cap, a second end of the positive electrode tab is welded to the cap; an insulation assembly arranged at both ends of the core.