912results about "Electrode manufacturing processes" patented technology

The present application relates to a kind of pore-aperture matched porous copper foil silicon-based negative and preparation method and application.The negative pole piece includes: the porous copper foil current collector with hole array structure, and the silicon-based active material layer coated on the surface of porous copper foil current collector and filled in the hole of hole array structure;The average pore diameter D of hole array satisfies 1.2d≤D≤5.0d with the average particle size d of silicon-based active material in silicon-based active material layer;Through the silicon-based active material particles filled in the hole, the limited structure of the multi-interface contact formed with hole wall, and the space for buffering the volume change of silicon-based active material particles is retained in the inside of hole, to form three-dimensional conductive support in porous copper foil current collector.

The invention discloses a synthesis method and application of nitrogen-doped carbon-coated Co porous spheres, cobalt nitrate hexahydrate and 4-picolinic acid are dissolved in a mixed solution, the mixed solution comprises dimethylformamide and absolute ethyl alcohol, then the mixed solution is transferred into a reaction kettle for heating reaction, and after the reaction is finished, centrifugal drying is performed to obtain a Co coordination compound precursor; and calcining the precursor in an argon hydrogen atmosphere, and selecting and setting a proper heating rate, a proper calcining temperature and a proper calcining time to obtain the nitrogen-doped carbon-coated Co porous ball. The obtained nitrogen-doped carbon-coated Co porous ball is used as the air cathode of the zinc-air battery, so that high power density and excellent charge-discharge cycle stability are realized.

Disclosed herein relates to a battery cell. The battery cell includes: a first case including a base plate; a plurality of stack cells on the base plate, each of the plurality of stack cells including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; a plurality of first tab collectors on the base plate; and a plurality of second tab collectors on the base plate, wherein the first tab collectors includes first fastening holes, and the first case includes first dents that partially fills the first fastening holes.

The present disclosure relates to a positive electrode and a method of manufacturing the same. The positive electrode includes lithium manganese iron phosphate with an olivine structure as a positive electrode active material, which provides high structural stability. In addition, the lithium manganese iron phosphate can be easily controlled for particle size distribution by doping and / or substituting with one or more metals, therefore the positive electrode including the same has the advantages of excellent rolling density and energy density.

The present invention pertains to a binder for a secondary battery positive electrode, to a method of preparation of said electrode and to its use in a secondary battery. The invention also relates to the secondary batteries manufactured by incorporating said electrode.

The utility model discloses a kind of rubber sticking mechanism and its tablet machine, wherein, a kind of rubber sticking mechanism, including base, send glue module, turnover module, rubber sticking module and cutter module being set on base, send glue module includes rotatable glue feeding disc and the open glue over roller group for keeping the tension of glue paper being set in glue feeding disc front side, send glue module is used to clamp and transport the glue paper wound on glue feeding disc to turnover module, cutter module is used to cut off the glue paper between send glue module and turnover module, rubber sticking module pushes and presses the glue paper that turnover module is turned over upwards and sticks on the polar piece of tablet machine.A kind of tablet machine, tablet machine includes rubber sticking mechanism.The utility model can adapt to the glue paper of thickness above 10 microns, and glue paper sticks on polar piece and has good sticking effect, without bubble, not wrinkling.

A method of stabilizing a battery in a formation process includes a charge-discharge operation of charging or discharging a battery cell in a formation process, and a pulse operation of charging or discharging the battery cell with a pulse current having a greater fluctuation than a current of the charge-discharge operation after the charge-discharge operation.

The present technology provides an electrode roll package including a bobbin, an electrode roll including an electrode sheet wound around the bobbin, a protective cover configured to surround the electrode roll, and a sealing cover configured to cover the electrode roll and the protective cover to seal the electrode roll and the protective cover.

The invention discloses a positive plate and a preparation method thereof, a battery and electric equipment. The compaction density of the positive plate is 1.92 g / cm < 3 >-2.135 g / cm < 3 >. According to the positive plate disclosed by the invention, the compaction density of the positive plate is controlled within the range of 1.92 g / cm < 3 >-2.135 g / cm < 3 >, so that the porosity of the positive plate is relatively reasonable while the energy density and the conductivity of a battery adopting the positive plate are ensured, the infiltration requirement of electrolyte on the positive plate is fully met, the transmission stability and the transmission reliability of ions are improved, and the service life of the battery is prolonged. Therefore, the charge-discharge efficiency and the cycle performance of the battery are improved.

This powder comprises a fibrous carbon having a structure in which cylindrical carbon hexagonal net surfaces are laminated in the fiber thickness direction. The ratio of volume resistivity when the powder is compressed to 0.8 g / cm3 to the volume resistivity when the powder is compressed to 0.6 g / cm3 is not less than 0.545.

The present invention relates to a laser cutting device that can improve the efficiency of a process by including a mask jig for shortening the replacement time of equipment when changing an electrode model, increasing the replacement cycle of equipment due to aging, and preventing the flow of electrodes during the process. The laser cutting device according to the present invention is a laser cutting device that notches an electrode tab on a moving electrode sheet, and includes a laser irradiator that repeatedly irradiates a laser along a preset path in a notching area of the electrode sheet, a drum that moves the electrode sheet, and a mask jig that is disposed on the opposite side of the laser irradiator across the notching area so as to support the notching area, and the mask jig is detachable from the drum.

The embodiment of the application provides a battery pole piece, a battery pole piece preparation method and a solid-state battery. The battery pole piece is prepared from a mixture of an active material, a solid-state electrolyte, a conductive agent and a binder. The mass ratio of the active material, the solid-state electrolyte, the conductive agent and the binder is 60-90:10-30:0.5-3:0.5-5. A higher proportion of the active material can significantly improve the energy density of the battery, and is fully mixed with the conductive agent, the solid-state electrolyte and the binder, which helps to uniformly distribute the current on the pole piece. The solid-state electrolyte is more stable in a high-temperature environment, which increases the overall safety of the battery. The appropriate conductive agent can improve the electron conduction between the active materials, significantly reduce the resistance, and ensure that the pole piece as a whole has good conductivity. The appropriate binder helps to maintain the integrity of the internal structure of the pole piece. The application solves the technical problems of large battery impedance and low battery safety performance.

The present invention relates to an electrode tracking device that forms markings on the electrode tabs of electrodes that are moved in one direction or that identifies the markings formed on the electrode tabs, and includes: a tracking unit that is movable in at least one of horizontal and vertical directions and includes at least one tracking unit of a marking machine and a reader; a guide unit that includes a first guide that has an inclined surface at one end and supports one side of the electrode, and a second guide that has an inclined surface at a position corresponding to the inclined surface of the first guide and supports the other side of the electrode; an interlocking unit that includes a first support member that has one end connected to the first guide and the other end connected to the tracking unit so as to be slidable in the vertical direction, and a second support member that has one end connected to the second guide and the other end connected to the tracking unit so as to be slidable in the vertical direction; and a foreign object storage unit that is open at the top, and the foreign object storage unit is connected to either the tracking unit or the interlocking unit.

A lithium metal battery according to one embodiment of the present disclosure comprises an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode; an electrolyte that impregnates the electrode assembly; and a battery case that incorporates the electrode assembly and the electrolyte, wherein the negative electrode comprises a negative electrode current collector and a lithium metal layer formed on at least one surface of the negative electrode current collector, and wherein the lithium metal battery is charged and discharged under a state where a pressure of 2 kgf / cm2 or more and 30 kgf / cm2 or less is applied thereto.

The present invention provides a manufacturing apparatus for laminates that can reliably laminate a coating material onto a thin substrate. [Solution] An apparatus for manufacturing a laminate 70 in which a coating material 60 is laminated on a base material 50, comprising: a micro-groove forming apparatus 10 having a transfer roll 11 with a roll groove 11a formed on its outer circumference surface, which transfers the roll groove 11a to the surface of the base material 50 to form a micro-groove; a lamination apparatus 20 for laminating the coating material 60 onto the surface of the base material 50 on which the micro-groove has been formed; and a pressing apparatus 30 for pressing the base material 50 and the coating material 60 together, wherein the micro-groove is composed of a plurality of intersecting first grooves and second grooves arranged at predetermined intervals in a predetermined direction, respectively, in an apparatus for manufacturing a laminate 1.

A coated separator includes a microporous polyolefin base membrane having a first base surface and a second base surface opposite the first base surface. The coated separator includes a first inorganic coating disposed on at least a portion of the first base surface and, optionally, a second inorganic coating disposed on at least a portion of the second base surface. Each of the first inorganic coating and the optional second inorganic coating includes a plurality of inorganic particles. The coated separator also includes a first adhesive coating disposed on at least a portion of the first inorganic coating and, optionally, a second adhesive coating disposed on at least a portion of the optional second inorganic coating. Each adhesive coating includes at least one adhesive.

According to exemplary embodiments of the present invention, an electrode splicing device is provided. The electrode splicing device comprises: a first splicing unit capable of gripping a trailing end part of a running electrode sheet; a second splicing unit which is positioned to face the first splicing unit and which can grip a leading end part of a standby electrode sheet; and a line contact type pressing unit for bonding, using tape, the trailing end part of the running electrode sheet and the leading end part of the standby electrode sheet. In addition, the present invention provides an electrode splicing method using the electrode splicing device.

A roll press rolls each including an upper roll and a lower roll that are supported by a main bearing at both ends and rotate at a predetermined speed, upper and lower bending bearings that are disposed outside each of the main bearings and correct deflection of the press rolls by receiving a bending load, an upper reverse operation bending mechanism provided in the upper roll that operates with hydraulic oil, a lower reverse operation bending mechanism provided in the lower roll, and two upper reverse operation bending mechanisms and two lower reverse operation bending mechanisms being installed in the upper and lower bending bearings, respectively. Deflection occurring in the upper roll and the lower roll is corrected by causing the upper reverse operation bending mechanism or the lower reverse operation bending mechanism to generate downward power or upward power, respectively.

To provide a coating liquid management device, a management method, and a management program capable of determining a state of gelatinization of coating liquid.SOLUTION: A coating liquid management device comprises a control unit. The control unit obtains analytical data of pulse NMR analysis of coating liquid in which functional fine particles are dispersed in a solution. The control unit separates the analytical data into two components of a hard component having relatively short transverse-relaxation time and a soft component having relatively long transverse-relaxation time. The control unit determines a state of the coating liquid based on at least one of a reduction in the abundance ratio of the hard component, an increase in the abundance ratio of the soft component, and a reduction in the transverse-relaxation time of the soft component. The control unit controls a coating liquid manufacturing apparatus based on the determination result.SELECTED DRAWING: Figure 1

Provided is a method of producing a lithium ion secondary battery, the method including: a charge and discharge treatment step of subjecting a first lithium ion secondary battery including a positive electrode having a positive electrode active material layer containing a sulfur-modified compound, a first liquid electrolyte, and a negative electrode to charge and discharge treatment; and a replacement step of replacing the first liquid electrolyte with a second liquid electrolyte to provide a second lithium ion secondary battery after the charge and discharge treatment step, wherein the first liquid electrolyte contains a solvent selected from the group consisting of: a saturated cyclic carbonate compound; and a saturated chain carbonate compound, and wherein the second liquid electrolyte contains a solvent selected from the group consisting of: a saturated cyclic ether compound; and a saturated chain ether compound.

The application provides a lithium phosphate-lanthanum phosphate composite coated lithium-rich manganese-based positive electrode material, and a method of adopting an ethanol-water mixed solvent evaporation drying combined with low-temperature sintering to uniformly construct a composite coating layer composed of ion conduction type lithium phosphate and inert stable type lanthanum phosphate on the surface of the lithium-rich manganese-based positive electrode material. The complementary function and the synergistic distribution in space of the lithium phosphate and the lanthanum phosphate together realize the comprehensive modification effect of "no reduction of ion transmission and effective inhibition of side reaction", effectively solve the key technical problems of low first coulomb efficiency, serious voltage attenuation in the cycle process and transition metal dissolution of the lithium-rich manganese-based positive electrode material, and meet the pursuit of people on the comprehensive performance of the high-energy-density lithium ion battery positive electrode material.

The application provides a wood electrode material preparation method which utilizes wood natural channels to combine multi-scale ion channels for synergistic design, thereby significantly improving ion diffusion efficiency. The method retains the original directional microchannel structure of wood, and uniformly loads active materials (molybdenum disulfide, graphene oxide or nano titanium dioxide) with rich intra-layer mesoporous structures on the surface of wood cell walls. The natural multi-stage channels of wood provide a natural channel for efficient transmission of electrolyte ions; among them, the cell cavity can significantly shorten the ion migration path and improve the accessibility of ions to active sites. The channels formed by the stacking of nanosheets and the intra-layer mesopores further construct a transverse and longitudinal ion diffusion network. Through the synergistic effect of natural wood channels and nanomaterial channels, a continuous and efficient multi-scale ion transmission path is formed, which significantly improves the ion diffusion performance and energy storage capacity of the electrode material, and provides a new strategy for the development of green and high-performance energy storage devices.

The embodiment of the present application relates to a kind of pole piece and its preparation method and battery, pole piece includes: current collector;First coating is arranged on at least one surface of current collector along the thickness direction, first coating includes first active material and composite temperature-sensitive polymer, composite temperature-sensitive polymer includes graphene oxide and temperature-sensitive polymer on the surface of graphene oxide, temperature-sensitive polymer has thermal expansion;Second coating is arranged on the surface of first coating away from current collector, second coating includes second active material and conductive agent, and conductive agent includes carbon nanotube and graphene;Third coating is arranged on the surface of second coating away from first coating, and third coating includes third active material, porous carbon and lyophilic polymer.Such as through the synergistic effect of first coating, second coating and third coating can effectively improve the wettability of pole piece to electrolyte, while being able to guarantee the conductivity of pole piece, so as to effectively improve the rate capability and cycle performance of battery.

The invention relates to a method for producing a battery electrode which is intended for use in an electrochemical battery cell, said battery electrode comprising a battery electrode carrier film (1), said battery electrode carrier film (1) being coated on at least one side with a battery electrode active material (3), so-called battery electrode active material layer (17), and said battery electrode active material layer (17) having so-called battery electrode active material pores which are completely or partially surrounded by pore-free active material, the method comprising the following steps: - providing the battery electrode carrier film (1) in the form of a strip which has a carrier film width in a carrier film width direction (21) and a carrier film length in a carrier film longitudinal direction, - transporting the battery electrode carrier film in the direction of the carrier film longitudinal direction (5), so-called production direction, - applying the battery electrode active material (3) to at least one side of the battery electrode carrier film (1) in order to produce a coated battery electrode carrier film, the carrier film (1) being covered at least in parts in the carrier film width and the carrier film length, - determining the composition of the applied battery electrode active material with respect to the proportion of the battery electrode active material pores and the proportion of the pore-free active material, so-called active material porosity, wherein the active material porosity is detected at a first location in the carrier film longitudinal direction (5) and at a plurality of further locations different from said first location, and wherein the active material porosity is thus detected at a plurality of different locations of the battery electrode in the carrier film longitudinal direction (5).

This application provides a pulverizer and belongs to the technical field of pulverizing equipment. [Solution] The pulverizer includes a support frame, a stator, and a rotor. The stator is connected to the support frame and has a stator grinding surface. The rotor is also connected to the support frame and has a rotor grinding surface that is rotatable. The stator grinding surface and the rotor grinding surface face each other, a grinding cavity is formed between the stator grinding surface and the rotor grinding surface, and the distance between the stator grinding surface and the rotor grinding surface is adjustable. Because the distance between the stator grinding surface and the rotor grinding surface is adjustable, the distance between the stator grinding surface and the rotor grinding surface can be adjusted according to the required particle size of the material, thereby allowing the pulverizer to grind materials to different particle sizes, thus providing broader applicability.

In the claimed method, a metal foil forming a first electrical current conductor is provided with openings, which are distributed uniformly on a surface of the metal foil and are arranged with spacings. The metal foil is subsequently brought into contact with a solid electrolyte, and the metal foil perforated in this way is then provided with a polymer coating, with which the free cross-sectional areas of the openings are filled. A thin, dense solid electrolyte layer is subsequently formed, and a layer forming the cathode is then formed on the opposite surface of the solid electrolyte in relation to the first current conductor, or a cathode is integrally bonded to said surface. The cathode is placed in electrically conductive contact with a further metal foil, which forms a second electrical conductor, on the oppositely arranged surface and is ionically conductively infiltrated with a liquid electrolyte, wherein an alkali metal anode is formed on the solid electrolyte in the region of the openings in the metal foil during charging of said electrochemical cells.

The present invention relates to a dry electrode coating system and method, the system comprising: a dry mixing unit for producing an active material by mixing precursor materials; a complex mixing unit for producing an electrode by mixing the active material with a conductive material and a binder; a dry coating unit for thickly applying the produced electrode to a current collector; and a winder for winding the coated current collector.

The application relates to the technical field of batteries, in particular to a full solid-state battery and a preparation method thereof. The full solid-state battery comprises a positive electrode sheet, a negative electrode sheet, an electrolyte film, a first insulating adhesive edge and a second insulating adhesive edge. The electrolyte film is arranged on at least one side surface of the negative electrode sheet along the thickness direction, the first insulating adhesive edge and the second insulating adhesive edge are arranged on the two side edges of the electrolyte film along the width direction, and the positive electrode sheet is arranged in the gap between the first insulating adhesive edge and the second insulating adhesive edge. Compared with the prior art, the full solid-state battery provided by the application solves the interface problems that the full solid-state electrolyte cannot be bent and the active material at the R corner cannot be pressed by adopting the gap coating mode to arrange the insulating coating at the R corner position, solves the edge insulation and alignment problems by constructing the edge insulating adhesive on the upper and lower edges of the negative electrode and wrapping the upper and lower edges of the positive electrode, and the production efficiency is improved and the production cost is greatly reduced.

The application discloses a negative electrode-free solid-state lithium metal battery cell with multiple interface film layers and a preparation method. The battery cell includes a first state and a second state; in the first state, the negative electrode tab includes a negative electrode current collector and an artificial interface modification layer, the artificial interface modification layer includes a lithiumophilic metal layer, a lithiumophilic metal compound layer located on the side of the lithiumophilic metal layer away from the negative electrode current collector, and an inorganic lithium ion conductor layer located on the side of the lithiumophilic metal compound layer away from the negative electrode current collector; in the second state, the negative electrode tab includes a negative electrode current collector and an interface layer, the interface layer includes a Li-M alloy layer, a Li-M alloy-lithium-containing compound layer located on the side of the Li-M alloy layer away from the negative electrode current collector, and an inorganic lithium ion conductor layer located on the side of the Li-M alloy-lithium-containing compound layer away from the negative electrode current collector; wherein M is a lithiumophilic metal. The battery cell can inhibit lithium dendrite growth and interface side reactions and reduce interface impedance, and has good cycle performance and safety performance.