2567results about "Electrode rolling/calendering" patented technology

Apparatus, system and method for simultaneously drying a coating on a substrate using at least two different drying phenomena, for example, inductive heating and convective heating, or inductive heating and a combination of convective heating and infrared heating. A coating on a substrate is dried by generating heat in the substrate while simultaneously applying convective heat and / or radiant heat to the coating. Simultaneous drying refers to drying of the same region of a substrate at the same time, and in a particular embodiment, subjecting the same region of a substrate to inductive heating and convection at the same time. Preferably the substrate is at least partially conductive.

The invention relates to the technical field of lithium battery manufacturing equipment, and discloses a rolling thickness control method and device, electronic equipment and a storage medium. According to the method, in the working process of the roller press, the real-time thickness of a machined object of the roller press is measured, the real-time thickness is compared with the target thickness, all adjusting parameters in a PID control algorithm are updated according to the comparison result, and the adjustment amount of the rolling parameters of the roller press is calculated through the PID control algorithm with the updated adjusting parameters. And therefore, closed-loop control on the rolling thickness is realized. In the working process of the roller press, the adjusting parameters of the PID control algorithm are updated on line according to the real-time condition, extra manpower and time do not need to be occupied for updating the adjusting parameters of the control algorithm, manpower and time consumption is saved, the adjusted adjusting parameters can better adapt to the real-time working condition of the roller press, and the working efficiency of the roller press is improved. And the accuracy of controlling the rolling thickness is improved.

The invention relates to an integrated carbonaceous honeycomb framework lithium metal composite negative electrode and a preparation method thereof, and belongs to the technical field of lithium metal batteries, the integrated carbonaceous honeycomb framework lithium metal composite negative electrode is formed by depositing lithium metal in an integrated carbonaceous honeycomb framework host, and the host is constructed by adopting metal salt-colloidal crystal microsphere template precursor preparation, compression molding and controllable carbonization processes. The structure has a highly ordered three-dimensional integrated macroporous skeleton, and can realize rapid transmission and uniform electric field distribution of lithium ions and electrons, so that dendrite-free homogeneous lithium deposition under ultrahigh capacity is realized, volume expansion is remarkably inhibited, and the reversible stability of lithium metal deposition / stripping is improved. The invention provides an efficient and stable negative electrode solution for a high-energy-density lithium battery, and has an important application prospect.

The invention provides a pole piece and a manufacturing method thereof, a rolling system and a secondary battery, and the manufacturing method of the pole piece comprises the following steps: coating slurry on a current collector and drying to obtain a dried pole piece; the difference between the thickness of the dried pole piece and the preset thickness after rolling is used as the total rolling reduction; the dried pole piece is subjected to continuous multi-stage rolling, adjacent two-stage rolling is carried out, the percentage of the rolling reduction of the previous-stage rolling in the total rolling reduction is larger than or equal to the percentage of the rolling reduction of the next-stage rolling in the total rolling reduction, and the sum of the rolling reduction of all stages of rolling is equal to the total rolling reduction; in the multi-stage rolling, the rolling reduction of each stage of rolling is gradually reduced on the whole; and the multi-stage rolling is cold pressing. According to the manufacturing method of the pole piece, the multi-stage rolling mode is adopted, the rolling reduction decreasing and roller gap adjusting mode is adopted, the diameter, roughness and hardness of the roller body are combined to adapt to different rolling reduction, and finally the consistency of stress release and the pole piece is achieved.

The invention relates to a coating system (1) for dry coating a carrier film (2) for producing an electrode (3) for a storage cell of an electrical energy storage device, with at least one first roller calender (5) for providing the carrier film (2) on at least one side (9) of the carrier film (2) with a first coating (6), wherein at least one second roller calender (13) is provided for providing the carrier film (2) on the first coating (6) with a second coating (14).

The invention provides a fast-charging type solid-state lithium battery alloy negative electrode material, a preparation method and a solid-state lithium battery, and relates to the technical field of lithium batteries. The alloy negative electrode material comprises the following element components in percentage by mass: 30-38% of indium In, 30-35% of tin Sn, 28-35% of bismuth Bi and 0-1.5% of doping elements, crystal phases formed by the alloy negative electrode material of the fast-charging type solid-state lithium battery at least comprise two crystal phases, namely InSn4 and InBi. The alloy negative electrode material has relatively high surface capacity, lithium ion conductivity and lithium ion diffusion coefficient, lithium dendrites do not grow on a negative electrode when a solid-state lithium battery assembled by the alloy negative electrode material is charged and discharged under high current density, and the battery is high in energy density and long in cycle life.

According to exemplary embodiments, provided in a method for generating a roll map. The method comprises the steps of: transmitting process information about an electrode sheet to a processor; updating a measurement condition of the processor on the basis of the process information; and collecting measurement data including measurement values on the basis of a measurement signal generated by measuring the electrode sheet, wherein the electrode sheet includes a plurality of coated lanes and a plurality of uncoated parts; and processing the measurement data on the basis of the measurement condition updated on the basis of the process information.

Examples include a device for coating a carrier substrate with a powdered material. The device includes an application unit having a first roller and a second roller which, at a nip thereof, form a first gap through which a powder mixture can be conveyed to form a dry film. A counter-pressure roller, together with the second roller or another roller arranged between the counter-pressure roller and the second roller, forms a second gap through which the carrier substrate to be coated can be guided for having the dry film applied to the carrier substrate. The first gap between the first and second rollers can be adjusted based on a position-based positioning drive by being set to a constant and / or defined gap width, and the second gap can be adjusted based on a force-based positioning drive, and can be set to a constant and / or defined contact force or linear force.

The invention discloses a novel lithium battery pole piece coating machine, which belongs to the technical field of coating machines, and comprises a coating machine body, and an unwinding device, a scratch monitoring device, a tensioning device, a sectional rolling assembly, a cutter assembly, a continuous rolling assembly, a coating assembly and a winding device which are sequentially arranged in the winding direction of a pole piece from front to back, the scratch monitoring device comprises a supporting rod fixed to the coating machine body, the length direction of the supporting rod is consistent with the width direction of the pole piece, and a plurality of linear array cameras are evenly arranged on the lower side of the supporting rod in the length direction at intervals; the sectional type rolling assembly comprises a main motor, an output shaft and a pressing roller, the output shaft comprises multiple sections of supporting shafts which are sequentially connected in the axial direction, and the two ends of each supporting shaft are connected with a first hinge joint and a second hinge joint correspondingly. According to the lithium battery pole piece coating device, protrusions and recesses on the surface of the lithium battery pole piece can be treated in time, and the uniformity of the subsequent pole piece during coating is improved.

The invention discloses a preparation method of an in-situ solid-state battery structure, which comprises the following steps: 1, mixing a polymer monomer, an initiator and an electrolyte to obtain an in-situ solid-state electrolyte precursor I, and mixing the in-situ solid-state electrolyte precursor I with an inorganic solid-state electrolyte to obtain an in-situ solid-state electrolyte precursor II; an in-situ solid electrolyte precursor II and an in-situ solid electrolyte precursor III are obtained; 2, preparing a positive plate and a negative plate; 3, coating the in-situ solid electrolyte precursor I on the surfaces of the positive plate and the negative plate, standing, curing and rolling to obtain a cured positive electrode and a cured negative electrode; 4, coating the surface of the cured positive electrode with the in-situ solid electrolyte precursor II, coating the surface of the cured negative electrode with the in-situ solid electrolyte precursor III, and standing and curing to obtain a composite positive electrode and a composite negative electrode; and 5, the composite positive electrode and the composite negative electrode are bonded and then cured. The preparation method effectively increases the contact area between the in-situ solid electrolyte and the positive and negative plates, improves the ion conduction efficiency, and is suitable for the technical field of battery preparation.

A method for manufacturing an anode electrode includes rolling a first aluminum foil layer; annealing the first aluminum foil layer to create a first annealed aluminum foil layer; mechanically bonding a first lithium metal foil layer between an anode current collector and the first annealed aluminum foil layer; and aging the anode electrode to prelithiate the first annealed aluminum foil layer.

The invention discloses a method for retarding black spot wrinkles of a PMMA (Polymethyl Methacrylate) gluing diaphragm lithium battery pole piece, which comprises the following steps: S1, adjusting parameters of a winding machine, adjusting the distance between pole pieces and tabs according to different parameters, and winding a battery cell; s2, performing hot pressing on the wound roll core by using different hot pressing parameters; s3, the hot-pressed roll core is assembled, put into a shell and fully charged in a capacity grading mode; wherein the parameter of the winding machine is embossing pressure; the hot pressing parameters comprise temperature, pressure and time. Therefore, by selecting the most appropriate embossing pressure and hot pressing parameter, black spots and wrinkles on the lithium battery interface of the PMMA glued diaphragm can be relieved, so that the electrochemical performance and the safety performance of the battery are improved.

Proposed is an apparatus and method for manufacturing a dry electrode sheet. The apparatus includes a material feeder supplying an electrode material, a pair of sheet forming rollers facing each other and forming an electrode sheet by pressurizing the electrode material supplied from the material feeder, a first force sensor connected to each of the sheet forming rollers and measuring a force applied to each of the sheet forming rollers, a thickness sensor measuring a thickness of the electrode sheet, a gap adjuster connected to each of the sheet forming rollers and adjusting the gap between the sheet forming rollers, and a controller controlling the gap adjuster to adjust the gap between the sheet forming rollers on the basis of a force value measured by the first force sensor so that the thickness of the electrode sheet received from the thickness sensor matches a target value.

The invention provides an anti-sticking roller self-cleaning pole piece pressing device for lithium battery production, which comprises a supporting plate and two groups of supporting rods symmetrically arranged on the top surface of the supporting plate, an operation part is arranged between the two groups of supporting rods, a plurality of groups of vertically parallel pressing roller pieces are arranged in the operation part, the two ends of the pressing roller pieces are connected with the supporting rods, and one group of pressing roller pieces is connected with the supporting rods in a sliding manner. A driver for driving the support rod to move and rotate is arranged on one side of the support rod; cleaning parts are arranged on the two sides of the supporting plate, an operation part is located between the cleaning parts, a cleaning assembly comprising a mounting frame and two sets of scrapers is arranged in each cleaning part, the scrapers scrape and press roller impurities, the mounting frames are connected with the supporting rods through lead screw structures, and the scrapers are mounted in the frames and make contact with the rollers; and a dry ice spraying part for spraying dry ice particles to the compression roller piece is also arranged in the group of cleaning parts. The device realizes self-cleaning of the compression roller piece through the cleaning assembly and the dry ice spraying part, solves the problems that a traditional device depends on manual cleaning, is low in efficiency and is easy to damage the compression roller, and guarantees the production quality and efficiency of the lithium battery pole piece.

The invention relates to the technical field of lithium batteries, in particular to a multi-layer negative electrode and a preparation method and application thereof.The base foil of the multi-layer negative electrode is provided with a bottom layer, the bottom layer is provided with a surface layer, and the surface layer comprises surface layer glue, surface layer conductive carbon and a surface layer active substance; the peel strength of the bottom layer is recorded as Rb, the peel strength of the surface layer is recorded as Rs, the rebound correction coefficient of the surface layer is recorded as Ee, the mass percent of surface layer glue in the surface layer is recorded as Cc, Rb is larger than or equal to 60N / m and smaller than or equal to 320N / m, Rs is larger than or equal to 5.6 N / m and smaller than or equal to 42N / m, Ee is larger than or equal to 0.233 and smaller than or equal to 1.45, Cc is larger than or equal to 1.2% and smaller than or equal to 7.5%, and [In (Rb / Rs-0. 4)] * (Ee / Cc) 1 / 2 is larger than or equal to 0.12 and smaller than or equal to 26.67. According to the invention, the negative electrode is designed into a multi-layer structure and is supplemented with the surface glue with excellent performance, so that the anti-expansion performance of the multi-layer negative electrode is improved under the synergistic effect, and the rapid charging performance and the long cycle performance of the lithium ion battery can be improved.

Disclosed in the present application is an electrode sheet roll-pressing and cutting system and method. The system comprises: an encoder, detection mechanisms, a programmable logic controller and a marking mechanism. The detection mechanisms shoot images of an electrode sheet in the system on the basis of the frequency of a pulse signal output by the encoder. An upper computer determines a defect region of the electrode sheet on the basis of the N-th image of the electrode sheet shot by the detection mechanisms and, on the basis of the defect region, determines the number S of pulses that the programmable logic controller needs to await. When determining that the S pulses have been awaited, the programmable logic controller sends a marking instruction to the marking mechanism. The marking mechanism marks the defect region of the electrode sheet on the basis of the marking instruction. In addition, the upper computer is further used for identifying edges of a tab region image among the images shot by the detection mechanisms, and determining the size of a tab region on the basis of the edges. Thus, the present application can determine the defect region of the electrode sheet, accurately mark the defect region on the basis of the position of the defect region in the electrode sheet, and determine the size of the tab region of the electrode sheet.

The invention discloses a low-porosity and low-impedance dry positive electrode of a solid-state battery and a preparation method of the low-porosity and low-impedance dry positive electrode. The dry positive electrode of the solid-state battery comprises a large-particle positive electrode active material, a small-particle positive electrode active material, a first conductive agent, a second conductive agent, a third conductive agent, a small-size sulfide solid electrolyte, a large-size sulfide solid electrolyte and a binder. All the components are mixed in a manner of size matching and step-by-step embedding. Size matching among multi-stage particles is introduced, so that the size of gaps among different components is reduced, and the porosity is reduced; the binding agent and part of the conductive agent are premixed to form a'binding-conductive double network ', and then the active material and the electrolyte are gradually embedded, so that the purpose of low impedance of the composite positive electrode is achieved. And finally, the rate capability and the cycling stability of the solid-state battery are improved.

The invention provides a positive pole piece, a battery and a preparation method of the positive pole piece. The positive pole piece comprises a positive current collector and a composite layer arranged on the surface of at least one side of the positive current collector, the composite layer comprises a first composite layer, a second composite layer and a third composite layer which are sequentially arranged along the thickness direction of the positive pole piece, and the first composite layer is arranged on the surface of the positive current collector; the first composite layer comprises a first conductive agent and a first binder, the second composite layer comprises a positive electrode active material, a second conductive agent, a second binder and a first fast ion conductor, and the third composite layer comprises a third conductive agent, a third binder and a second fast ion conductor. According to the invention, the electrochemical performance of the battery prepared by a dry-method electrode preparation process can be effectively improved.

A system for tracking a position of an electrode of a battery cell is disclosed which comprises: a controller configured to acquire coordinate information of the electrode and a cell identification (ID) of the unit electrode; a calculator configured to calculate coordinates of the cell ID, the coordinates of the cell ID corresponding to one or more positions of the unit electrode; a roll map generator configured to generate a roll map based on the coordinate information of the electrode obtained from the controller, the roll map including coordinates of the roll map based on a dimension in a length direction of the electrode; and a mapping part configured to compare the coordinates of the roll map with the coordinates of the cell ID to derive the one or more position of the unit electrode during the electrode manufacturing process from which the unit electrode originates.

The invention discloses a dry-method electrode film rolling compounding method and dry-method electrode film rolling equipment. The method comprises the following steps: leading out a current collector film from an unpowered unreeling shaft, forming a suspension arc by virtue of self weight, and penetrating through a first roller gap; synchronously unrolling the two dry-method electrode films in an unpowered manner, so that the two dry-method electrode films enter the first roller gap in a self-weight overhanging state and are attached to the two surfaces of the current collector film to form an initial complex; coating the outer side of the initial complex with an isolating membrane to obtain a to-be-heated complex, and enabling the to-be-heated complex to enter a second roller gap after the to-be-heated complex is overhung by self weight; the to-be-heated composite body is subjected to hot-pressing compounding through compounding rollers on the two sides of the second roller gap; and then stripping the isolating membrane and rolling the double-sided dry-method pole piece. According to the method, near-zero tension conveying is achieved through natural suspension, and by matching with isolation film wrapping and one-time double-face pressing of the hot-pressing roller, edge micro-cracking and whole belt breakage of the dry-method electrode film can be effectively avoided, and the interface density and the roll-to-roll production yield are improved.

The invention discloses roll forming equipment with a cooling structure, and belongs to the technical field of electrode roll forming equipment, the roll forming equipment comprises a shell, a press roll driving unit is arranged on one side of the top of the shell, and two press roll units with opposite rotating directions are arranged in the press roll driving unit. According to the device, an external adjusting device adjusts the use distance between multiple compression rollers in the compression roller unit, at the moment, a spring can drive a sliding base and a rack to move, a second annular gear drives a rotating shaft and a protruding block to rotate, a main oil bag expands, and a second spiral blade is driven to move; according to the cooling device, the screw pitch between the second spiral blade and the first spiral blade is adjusted, the flowing speed of cooling liquid between the first spiral blade and the second spiral blade is increased in an auxiliary mode, the laminar flow of the cooling liquid is destroyed, and therefore the overall cooling effect of equipment is effectively improved; and through dynamic adjustment, the equipment is suitable for the cooling requirements of electrode diaphragms with different thicknesses produced under variable working conditions.

According to exemplary embodiments, a method for generating a roll map is provided. The method comprises the steps of: unwinding an electrode sheet from a first electrode roll and winding the electrode sheet into a second electrode roll; collecting unwinding direction data of the first electrode roll; and generating a second roll map of the second electrode roll on the basis of a first roll map of the first electrode roll and the unwinding direction data of the first electrode roll.

A method for manufacturing an electrode for a secondary cell, comprising the steps of: providing an electrode substrate comprising an electrically conducting material; forming an active layer on the electrode substrate, wherein the active layer comprises a plurality of carbonaccous particles; exposing the active layer to a magnetic field configured to orient a majority of the particles along a normal of the substrate; and exposing the active layer to laser pulses or mechanical rollers to form a plurality of passages in the active layer, thereby facilitating ionic transport towards the substrate.

The present disclosure relates to a lithium-ion battery component and methods for manufacturing the lithium-ion battery component. The battery component, in some examples, includes a current collector, a porous deposit of first active material and first binder on the current collector, and a solvent-free electrode layer of second active material and second binder laminated with the porous deposit to at least partially occupy the pores of the porous deposit.

The invention discloses a current collector composite copper foil film spreading method and device, and the method comprises the steps: applying a DC electric field to a current collector composite copper foil, forming an interface charge separation layer, obtaining reference capacitance distribution data, applying a film spreading tension to enable the material layers to generate microscopic displacement, and obtaining capacitance change data. The method comprises the following steps: analyzing and identifying an abnormal adhesion area through time domain difference and sliding window correlation, applying periodic micro-stress disturbance to the abnormal area to establish a stress-capacitance response relation to invert adhesion strength spatial distribution, and periodically recording a capacitance reference value to evaluate the interface adhesion fatigue degree. The device comprises an electric field processing module, a film spreading tension module, a correlation analysis module, a stress disturbance module and a fatigue evaluation module. According to the scheme, real-time dynamic detection and quantitative evaluation of the interlayer adhesion strength in the current collector composite copper foil film spreading process can be realized, the interface adhesion failure and fatigue accumulation state can be effectively identified, and accurate technical support is provided for battery current collector preparation process optimization and product quality control.

The invention discloses a negative plate, a preparation method thereof and a solid-state battery, and relates to the technical field of battery materials. The disclosed negative plate comprises a current collector, and a bottom layer with the thickness of 10-50 [mu] m, a middle layer with the thickness of 10-50 [mu] m and a surface layer with the thickness of 10-50 [mu] m which are sequentially arranged on the surface of the current collector, the bottom layer comprises the following components in percentage by mass: 1-30% of small-particle-size solid electrolyte and 0.5-3 microns of D50; the component of the middle layer comprises medium-particle-size solid electrolyte, the mass ratio of the medium-particle-size solid electrolyte is 5-30%, and D50 is 3-5 [mu] m; the component of the surface layer comprises a large-particle-size solid electrolyte, the mass ratio of the large-particle-size solid electrolyte is 5-30%, and D50 is 5-10 [mu] m. Compared with a common negative plate, the negative plate provided by the invention optimizes the ion transmission path, relieves the interface stress and improves the electrochemical performance.

The invention provides a mixed negative electrode material. The mixed negative electrode material comprises a silicon carbon material and a graphitized material, the silicon-carbon material takes porous carbon as a matrix, and a silicon layer and an ordered layered carbon layer are sequentially deposited on the surface of the porous carbon matrix; the compaction density of the mixed negative electrode material is 1.0-2.0 g / cm < 3 > and the conductivity is 0.80-118 S / cm under the pressure of more than or equal to 5 Mpa; the ratio of the mass ratio of the graphitized material to the mass ratio of the silicon-carbon material is greater than or equal to 1.6 and less than or equal to 8.5, and the particle size Dv10 of the mixed negative electrode material is 1.1-5.2 mu m; dv50 is 5.3 [mu] m to 16 [mu] m; dv90 is from 16 [mu] m to 35 [mu] m; the porosity of the mixed negative electrode material is 0.005%-0.1%; the specific surface area is 1.2-3.2 m < 2 > / g, and the surface of the negative electrode is provided with a cutting area. The problems that the negative electrode interface stability is reduced, the impedance is increased, the lithium ion conducting capacity is low, and the battery cycle performance is poor are solved.

A negative electrode sheet, the negative electrode sheet comprising a negative current collector and lithium metal layers. The negative current collector has a first surface and an opposite second surface, the first surface and the second surface of the negative current collector being loaded with the lithium metal layers. In the technical solution, loading the surfaces of the negative current collector with lithium metal to serve as the negative electrode sheet can greatly ameliorate the problem that, when independently serving as a negative electrode sheet, the lithium metal is prone to pulverization and collapse in cyclic processes, improving the cycle performance of batteries.

A device and method for manufacturing an electrode are disclosed. An electrode manufacturing device includes an electrode sheet supply roll transferring a pre-electrode sheet which forms a face and another face; a position adjustment roll adjacent to the electrode sheet supply roll and receiving the pre-electrode sheet from the electrode sheet supply roll; a laminating roll and a pressurizing roll which receive the pre-electrode sheet from the position adjustment roll and face each other; an active material supply roll facing the laminating roll and providing an active material to the laminating roll; and a heater proving heat to a heating area of the pre-electrode sheet positioned between the electrode sheet supply roll and the position adjustment roll. The pre-electrode sheet and the active material are inserted into and discharged from between the laminating roll and the pressurizing roll.

The invention provides a negative electrode and a preparation method thereof, a battery and electric equipment. The negative electrode comprises a negative electrode current collector and a negative electrode active material layer arranged on the surface of the negative electrode current collector, the negative electrode active material layer comprises graphite, the orientation value of the negative electrode active material layer is less than or equal to 3, and the binding force between the negative electrode current collector and the negative electrode active material layer is greater than or equal to 0.25 N / 40mm. The negative electrode has excellent ion and electron transmission capability and good internal stability, is favorable for being used in the battery, improves the charge-discharge rate and the cycle capacity retention rate of the battery, and prolongs the service life of the battery.