2450 results about "Battery electrode" patented technology

A glassy electroactive prepreg made by generating submicron particles of lithium-ion conducting sulfide glass by providing lithium-ion conducting sulfide glass feedstock material, and subjecting the feedstock material to subzero processing to transform the material into submicron particles can avoid plastic deformation of sulfide glass particles during grinding and produce submicron powders. The prepreg is formed by providing a porous electroactive layer comprising electroactive material, and infiltrating the porous electroactive layer with the submicron particles of lithium-ion conducting sulfide glass. The subzero processing can include cryogenic processing. The prepreg can be used to form glassy embedded electrodes.

The utility model discloses a battery pole piece, a secondary battery and electric equipment. The battery pole piece comprises a current collector, a priming coat arranged on the surface of at least one side of the current collector, and an active layer arranged on the surface of one side, far away from the current collector, of the priming coat, the bottom coating comprises a first conducting layer and a second conducting layer which are arranged in parallel along the length direction of the battery pole piece, the active layer at least partially covers the surface of one side, far away from the current collector, of the first conducting layer, and the surface of one side, far away from the current collector, of the second conducting layer is at least partially not covered by the active layer; the conductivity of the first conductive layer is greater than that of the second conductive layer. The bottom coating is arranged on the current collector of the battery pole piece, and the bottom coating can enable the current collector, which is not covered by the active layer, of the second conductive layer to be locally short-circuited in advance when the battery pole piece is mechanically abused, so that the safety performance of the battery is improved, and the battery pole piece has relatively good conductivity and can improve the charging capability and the energy density of the battery.

The invention relates to the technical field of battery pole piece recovery, in particular to a waste lithium iron phosphate battery positive pole piece physical dry recovery method which comprises the following steps: fragmenting waste lithium iron phosphate battery positive pole pieces, carrying out electromagnetic separation, and sequentially carrying out low-temperature embrittlement treatment and two-stage mechanical dissociation, a dissociation material obtained by separating the black powder, the current collector and the high-molecular binder is obtained; then, two-stage screening is adopted, fine black powder smaller than 50 micrometers is obtained through screening, the binder in the fine black powder is fused through pulse hot air and enters a hollow porous ceramic roller along with airflow, the fused binder is adsorbed to the outside of the roller through micropores of the porous ceramic roller according to the surface energy difference, and therefore the binder is removed and recycled; and finally, airflow separation is carried out, and a black powder product and current collector chippings are obtained through separation. According to the method, chemical pollution and high-temperature damage can be avoided, accurate separation of the black powder, the aluminum foil and the binder is efficiently achieved, and the purity of the black powder product is 99% or above.

The invention relates to a lithium battery positive electrode slurry, a positive electrode plate, a preparation method and an application, and belongs to the technical field of battery plate processing, the positive electrode slurry comprises a positive electrode active material, a conductive agent, a binder and a solvent; the solvent comprises an amide solvent and dichloromethane, and the mass ratio of the positive active material to the conductive agent to the binder is (70-80): (10-15): (10-15); the mass ratio of the dichloromethane in the solvent is 0.01%-0.5%. The positive electrode plate comprises a positive electrode current collector and a positive electrode coating layer, and the positive electrode coating layer is obtained by coating the surface of the positive electrode current collector with positive electrode slurry. The positive pole piece is applied to the lithium ion battery. The prepared positive electrode slurry is good in uniformity, the coating uniformity of a positive electrode piece is good, the peeling strength of an electrode is remarkably enhanced, and the performance is more excellent in an electrochemical performance test.

The utility model discloses a coating device. The coating equipment comprises a conveying device, a coating device and a base material separating device, the conveying device is used for conveying a current collector along a conveying path, the current collector comprises a first surface and a second surface which are arranged oppositely, the current collector is provided with a through hole penetrating through the first surface and the second surface, and a hole blocking base material for blocking the through hole is attached to the first surface; the coating device is located on the conveying path and used for applying slurry to the second surface so as to allow the slurry to fill the through hole; the base material separating device is located on the downstream of the coating device on the conveying path and used for separating the hole blocking base material and the current collector. Therefore, pollution and the like caused by the fact that slurry flows into the first surface are improved, the slurry can be limited in the through hole through the hole blocking base material so as to fill the through hole, the hole blocking base material and the current collector can be separated through the base material separation device, the separation difficulty of the hole blocking base material and the current collector is reduced, and the production efficiency of the battery pole piece is improved.

The invention relates to the technical field of battery electrodes, in particular to a zinc pole piece coated with a sulfonic COF membrane, a preparation method of the zinc pole piece and an aqueous zinc battery, and the preparation method comprises the following steps: dissolving 2, 4, 6-triformyl phloroglucinol and p-phenylenediamine-2, 5-disulfonic acid in an organic solvent to obtain a mixed solution; and putting the zinc foil into the mixed solution, carrying out sealed standing at normal temperature, taking out the zinc foil coated with the sulfonic group COF film, and washing and drying the zinc foil to obtain the zinc pole piece coated with the sulfonic group COF film. The prepared zinc pole piece coated with the sulfonic COF film has good corrosion resistance and dendritic crystal inhibition capacity, and when the zinc pole piece is used as a negative electrode of a water-based zinc battery, the cycle performance of the water-based zinc battery can be improved, and the cycle life of the water-based zinc battery can be prolonged; the problems that a zinc negative electrode of an existing water-based zinc battery is prone to generating dendritic crystal and corrosion passivation side reactions in the battery circulation process, so that the use performance of the water-based zinc battery is reduced, and the service life is greatly shortened are solved.

The utility model discloses a solar energy and gravity combined power generation and energy storage system, which comprises a solar power generation assembly, an inversion controller, an energy storage battery, a charging and discharging station, a generator, a gravity power generation assembly and a lifting motor, and is characterized in that the gravity power generation assembly comprises a lifting frame and a battery platform arranged on the lifting frame; according to the utility model, the gravity power generation assembly utilizes electric energy exceeding the energy storage upper limit of the energy storage battery to generate power at night through the gravity power generation assembly, so that the power generation efficiency is improved, and the power generation efficiency is improved. The utilization rate of energy can be improved; besides, through the charging and discharging movable contact structure and the charging and discharging fixed contact structure, the charging and discharging processes of the energy storage battery are carried out on the ground, the charging and discharging movable contact structure is connected with the electrodes of the energy storage battery, wiring of the movement section of the energy storage battery can be omitted, and safety is higher.

The utility model relates to the technical field of new energy batteries, in particular to a laser welding clamp for battery tabs, the laser welding clamp for the battery tabs comprises a press-fit assembly and a bearing base plate, the press-fit assembly comprises a dust collection block, the dust collection block is provided with a dust collection groove and a dust collection hole, the dust collection hole communicates with the dust collection groove, and the bearing base plate is arranged opposite to the press-fit assembly. According to the laser welding clamp for the battery electrode lug, the pressing assembly and the bearing base plate are matched to clamp and fix the battery electrode lug, dust generated in the welding process is sucked back through the dust suction grooves through the dust suction holes, and the problem that in the traditional laser welding process of the electrode lug, a large amount of dust is generated to pollute the environment is solved.

The invention relates to a battery pole piece winding tension control method and device and winding equipment. The method comprises the following steps: acquiring the diameter of a roller and the winding thickness of a pole piece wound on the roller; according to the rolling thickness, the initial rolling tension and the tension taper coefficient are determined; wherein the size relation between the winding thickness and the initial tension is a reverse relation, and the size relation between the winding thickness and the tension taper coefficient is a forward relation; according to the roller diameter, the winding thickness, the initial tension, the tension taper coefficient and a preset algorithm, the winding tension for winding the pole piece on the roller is determined; and controlling the winding of the pole piece according to the winding tension. According to the scheme, according to the universal control method suitable for pole piece winding, the good winding effect of different types of material rolls is achieved.

Various embodiments of the teachings herein include an apparatus for hyperspectral imaging of electrode webs during electrode manufacturing for battery cells. An example includes: a hyperspectral spectroscopy unit with a line scan camera for imaging, the spectroscopy unit configured: to capture hyperspectral images of the forward-moving electrode web at a predefined location of the electrode manufacturing, to ascertain inhomogeneities of the electrode web from the images, wherein an inhomogeneity is a deviation of the chemical composition of the layers or of the particle size distribution from predefined target variables, and to ascertain and save a local position of the inhomogeneities in the longitudinal direction of the electrode web; and a deflection roll over which the electrode web is guided. The line scan camera captures the images at the position of the contact surface between the deflection roll and the electrode web.

The invention relates to the field of lithium battery recovery treatment equipment, and discloses a waste power lithium battery electrode material separation treatment device which comprises a treatment box, a crushing cavity is formed in the inner top of the treatment box, two rotating shafts are movably installed in the crushing cavity, and crushing rollers are fixedly installed on the outer diameters of the middles of the rotating shafts; a supporting seat is fixedly mounted on the lower side of the interior of the grinding cavity, a movable shaft is movably mounted in the middle of the top end of the supporting seat, a plurality of projecting discs are uniformly and fixedly mounted on the outer diameter of the movable shaft, and a plurality of grinding wheels are movably mounted on the outer diameters of the bottoms of the projecting discs; annular grinding grooves are formed in the positions, corresponding to the grinding wheels, of the inner wall of the lower side of the grinding cavity. Safety is guaranteed through brine discharge, efficient crushing and grinding are achieved through the crushing rollers, the grinding wheels and the like, impurities and magnetic and non-magnetic substances can be accurately separated, power transmission is reasonable, the structure is compact, and installation and operation are convenient.

The present invention provides a water-based binder for nanocellulose-based secondary battery electrode, comprising:a latex particle with a core-shell structure comprising: a core containing a rubbery polymer; and a shell formed by combining one or two monomers selected from the group consisting of an acryl-based monomer and a non-acryl-based monomer on the surface of the core through a chemical reaction; anda nanocellulose interacts with a functional group of the shell surface.

The invention belongs to the field of preparation of secondary battery electrode materials, and particularly relates to an anthraquinone conjugated coordination polymer electrode material for a secondary battery as well as a preparation method and application of the anthraquinone conjugated coordination polymer electrode material. The structure of the anthraquinone conjugated coordination polymer is shown as a formula # imgabs0 #, R1 and R2 are respectively and independently selected from O, S or NH, and R1 and R2 are not O at the same time; r3 and R4 are independently selected from a hydrogen atom, an amino group, a hydroxyl group or a sulfydryl group; m is a transition metal ion. The anthraquinone conjugated coordination polymer is used as a positive electrode of a secondary battery, the anthraquinone conjugated coordination polymer, a conductive agent and a binder are uniformly mixed in a dispersion liquid, then a current collector is uniformly coated with the mixture, and then vacuum drying is performed to obtain the positive electrode of the secondary battery. The technical problems of low specific capacity, low energy density and rapid degradation of capacity and cycle performance of the secondary battery are solved.

The utility model discloses a solid-state battery electrode slice processing extruder, which relates to the technical field of battery electrode slice processing, and comprises a rack, an extrusion mechanism is arranged in the rack, the extrusion mechanism comprises three moulds, the bottom surface of each mould is fixedly connected with the inner wall of the rack, two cylinders are fixedly arranged on the inner top wall of the rack, and the cylinders are fixedly connected with the rack. A connecting plate is fixedly installed at the telescopic ends of the two air cylinders jointly, a connecting block is fixedly installed on the bottom face of the connecting plate, two connecting springs are fixedly installed on the two side faces of the connecting block, a moving seat is fixedly installed at the end, away from the connecting block, of each connecting spring, and a connecting rod is movably hinged to the interior of each moving seat; a concave block is movably hinged to the bottom end of each set of connecting rods, a movable plate is fixedly installed on the bottom faces of the two concave blocks, and pressure sensors are fixedly installed on the bottom faces of the connecting blocks. And the rack and the extrusion mechanism are matched for use, so that a worker can conveniently adjust the pressure on the electrode plate.

A diagnostic device, a battery manufacturing system, a battery pack, an electric vehicle, and a diagnostic method are provided. The diagnostic device according to the present invention is a diagnostic device for diagnosing the states of first to n-th active materials (n is a natural number of 2 or more) included in a battery electrode (the electrode is a positive electrode or a negative electrode), and includes: a profile acquisition unit configured to acquire a target electrode profile indicating a correspondence relationship between the capacity and voltage of the electrode; and a diagnostic unit configured to generate first to m-th simulation electrode profiles (m is a natural number of 2 or more) from predetermined first to n-th reference active material profiles, individually compare the first to m-th simulation electrode profiles with the target electrode profile, and diagnose the states of the first to n-th active materials based on the comparison results.

The invention discloses a flying cleaning process for a thinning area of a battery pole piece, and relates to the technical field of laser processing. The method comprises the following steps: S1, selecting a homogenized DOE lens for a pulse laser and / or a continuous laser, arranging the homogenized DOE lens on an external light path, adjusting the angle of the lens to enable laser to vertically and smoothly pass through the center of the homogenized DOE lens, and rotating the homogenized DOE lens to adjust the angle of a shaped light spot to an area to be cleaned after light is emitted; s2, cleaning upper-layer graphite of the coating layer of the thinned area by adopting a continuous laser / pulse laser until the copper foil is slightly exposed, and uniformly cleaning the thinned area; and S3, cleaning the residual bottom layer graphite of the coating layer in the thinned area by using a pulse laser. The cleaning process is simple and reliable, the yield of the laser cleaning thinned area can be effectively improved, the lossless cleaning effect is achieved, and meanwhile the laser cleaning efficiency can be remarkably improved.

The present invention relates to: a composition for modifying the surface of an electrode active material for a secondary battery, wherein the composition comprises cellulose, modified cellulose, or a mixture thereof; an electrode active material for a secondary battery, wherein the electrode active material is coated with cellulose, modified cellulose, or a mixture thereof; and a secondary battery comprising same. According to the present invention, a dry electrode can be manufactured by excluding the use of a fluorine-based binder or reducing the amount of the used fluorine-based binder, and excellent dispersibility and adhesion are achieved without using a PTFE binder conventionally used as a dry electrode binder, thereby enabling the production of a high-capacity thick film electrode.

One or more aspects of the present disclosure provide methods for recovering and upgrading a secondary battery anode material. The method includes: producing a raw anode material by processing a spent battery material containing a first anode material; purifying the original negative electrode material; and generating a second anode material using the purified raw anode material. In some embodiments, the first anode material includes graphite. And the second negative electrode material comprises a graphite-silicon composite material and / or a graphite-silicon oxide composite material. The second negative electrode material may be a battery-grade negative electrode material that can be directly used for a new battery electrode.

The invention provides a method for evaluating the compaction density of a lithium ion battery pole piece, and relates to the technical field of lithium ion batteries, and the method comprises the following steps: carrying out a real-time compaction test on the pole piece, the real-time compaction test comprises the step of gradually reducing the roll gap spacing by taking a preset length value as a gradient under a constant pressure condition, under the condition of a constant roll gap, recording pole piece thickness data corresponding to each roll gap value in real time, gradually increasing the rolling pressure by taking a preset pressure value as a gradient under the condition of a constant roll gap, and recording pole piece thickness data corresponding to each rolling pressure value in real time to obtain corresponding compaction density data; obtaining a first compaction characteristic curve according to each roll gap value and the compaction density data of the corresponding roll gap value, and obtaining a second compaction characteristic curve according to each rolling pressure value and the compaction density data of the corresponding rolling pressure value; the limit compaction density of the pole piece can be objectively and quickly determined through the first compaction characteristic curve and / or the second compaction characteristic curve, so that the battery performance and the production efficiency can be improved.

The invention provides a battery pole piece uniformity test method, device and equipment, a medium and a program, and belongs to the technical field of batteries. The testing method comprises the following steps: acquiring a plurality of electrochemical impedance spectrums of a plurality of testing positions of a to-be-tested pole piece based on a pre-constructed locally symmetric battery, the locally symmetric battery being pre-constructed according to the following steps: acquiring the to-be-tested pole piece; an auxiliary test pole piece is obtained, the auxiliary test pole piece and the to-be-tested pole piece are processed through at least one same processing procedure, and the area of the auxiliary test pole piece is smaller than that of the to-be-tested pole piece; and adding a diaphragm between the to-be-tested pole piece and the auxiliary test pole piece to obtain a locally symmetrical battery, determining a plurality of characteristic resistances of the pole piece to be detected according to the plurality of electrochemical impedance spectrums; and determining the uniformity of the to-be-tested pole piece based on the plurality of characteristic resistors of the to-be-tested pole piece. According to the method, the uniformity of the electrical performance of the pole piece can be efficiently evaluated, and a theoretical basis can be provided for process optimization in the battery processing process, positioning of battery failure reasons and the like.

The present application belongs to the field of machine vision defect detection, and in particular to a thermocell electrode sheet vision defect detection method and a vision defect detection device. Product size information of a thermocell electrode sheet is obtained, and the field of view of a camera is configured. A thermocell electrode sheet to be detected is placed on a detection platform, front surface images, side surface images, back surface images, and inner hole images of the thermocell electrode sheet are captured by multiple direction detection cameras, and are processed to obtain the to-be-detected images of the front surface images, the side surface images, the back surface images, and the inner hole images. According to the to-be-detected images of the front surface images, the side surface images, the back surface images, and the inner hole images, a trained YOLO8 recognition model is used to describe and determine defects.

The invention relates to the technical field of automatic control, and discloses a roll diameter calculation method for high-speed and wide battery pole piece equipment, and a system comprises an unwinding unit, a metering roller unit, a winding unit, an unwinding encoder, a metering encoder, a winding encoder and a controller, and the unwinding encoder, the metering encoder and the winding encoder are respectively connected with an unwinding shaft, a metering roller and a winding shaft. The method comprises the following steps: synchronously obtaining the angle increment of each shaft and the length increment of a material; calculating a stable rolling diameter through a symmetric differential model based on the incremental data; generating a characterization variable for quantifying the stretching state of the material as process feedback; an adjustment signal is generated in a closed loop without a physical sensor and used to dynamically correct the drive command. High-precision rolling diameter calculation and self-adaptive tension closed-loop control are achieved through a pure algorithm, a physical tension sensor is replaced, the equipment cost and the maintenance difficulty are remarkably reduced, and the system operation stability and the final product quality are improved.

An apparatus for manufacturing an electrode of a secondary battery, includes: a storage unit to store a slurry; a die coater connected to the storage unit, and to discharge the slurry onto a substrate; a supply unit connected to the storage unit and the die coater, and to supply the slurry from the storage unit to the die coater; a slurry measuring unit to measure a density and a flow rate of the slurry supplied from the supply unit; and a controller to control the supply unit based on the density and the flow rate of the slurry transmitted from the slurry measuring unit.

A positioning and clamping apparatus includes a hoisting unit including a support plate, two piston members, two first actuators, two hoisting plates, and an interconnection plate; a transporting unit including a second actuator, two movement rods, and a transporting plate; and a micro adjustment positioning unit including a limiting plate, two follower plates, two sliding members, a third actuator, and a positioning plate. The positioning and clamping apparatus is used for cell electrode plate groups, lead bridges, and lead heads of a lead-acid battery.

An air-coupled ultrasonic scanning platform for an air-coupled ultrasonic non-contact metrology of battery electrodes that maps the local variation in density and thickness, and detect defects during electrode casting and drying, includes: piezocomposite air-coupled transducers (Ultran) at 0.5 to 1 MHz that provide sufficient air coupling to enable sound waves to travel through air from a transmitting transducer, through the thin film electrode coated on metal current collector, and then into the receiving transducer. Non-contact, air-coupled ultrasound may be used as a technique for evaluating battery electrode films. An analytical model was derived from fundamental acoustic wave propagation principles to determine acoustic density. Voltage gain or acoustic density maps of electrode films revealed features that are not visually apparent, attributed to mass gradients.

Systems and apparatus may carry out analysis of battery physical phenomena, and characterize batteries based on phenomena occurring in particular time and / or frequency domains. These systems may be additionally responsible for charging and / or monitoring a rechargeable battery. Examples of battery physical phenomena include mass transport (e.g., diffusion and / or migration) in battery electrolytes, mass transport in battery electrodes, and reactions on battery electrodes.

Systems and apparatus may carry out analysis of battery physical phenomena, and characterize batteries based on phenomena occurring in particular time and / or frequency domains. These systems may be additionally responsible for charging and / or monitoring a rechargeable battery. Examples of battery physical phenomena include mass transport (e.g., diffusion and / or migration) in battery electrolytes, mass transport in battery electrodes, and reactions on battery electrodes.

Multi-sensor-based battery electrode scanning for in-process multi-stage defect detection and classification is provided. A defect detection system includes different types of sensors configured to scan battery electrode materials and generate output signals including respective image data; a feature extractor module receiving the output signal and performing feature extraction to fuse image data of the output signal to generate a feature map of a corresponding portion of the battery electrode material; a coarse detector determining, based on the feature map, whether defects exist in portions of the battery electrode material and generating, for each portion, binary information indicating whether the portion includes one or more defects; and a fine detector that classifies the defect based on the binary information and at least one of the feature map and the image data. The control module performs one or more operations based on the detected and classified defects.

The invention discloses a lithium battery electrode surface defect identification early warning method and system, and relates to the technical field of defect detection.The method comprises the steps that historical defect identification records of a target production line are obtained and subjected to gray level enhancement processing, and multi-dimensional image features are extracted; performing clustering analysis on the historical data based on the features to obtain a sample data set; training the adaptive defect recognition model by using an integrated learning method, and obtaining a real-time image at a preset point location for defect recognition; and according to the multi-dimensional defect features, identification result judgment is carried out, and defect early warning is carried out. The technical problems of lack of detection pertinence, poor detection efficiency and poor detection accuracy for complex and changeable defects in the prior art are solved, and the technical effects of efficiently and accurately identifying the complex and changeable defects of the lithium battery electrode surface and the lithium battery diaphragm and remarkably improving the detection pertinence, the detection efficiency and the detection accuracy are achieved.

The invention discloses a carbon nanofiber / porous carbon microsphere-based positive electrode and negative electrode for a zinc ion battery, which are structurally characterized in that a three-dimensional network carbon nanofiber skeleton and honeycomb porous carbon microspheres form a composite conductive carrier; the positive electrode adopts an interconnected conductive network formed by overlapping carbon nanofibers loaded with manganese dioxide nanosheets on the surfaces and honeycomb porous carbon microspheres embedded with manganese dioxide inside; and a metal zinc layer is deposited on the surface of the same carrier for the cathode. The preparation method mainly comprises the following steps: preparation of a carbon nanofiber / honeycomb porous carbon sphere composite membrane, preparation of a manganese dioxide composite positive electrode material by a hydrothermal method, and preparation of a zinc composite negative electrode material by a constant current deposition method. According to the design, the ion transmission efficiency is improved through the three-dimensional hierarchical pore structure, the conductivity is enhanced through the carbon network, the problems of poor structural stability, fast capacity fading and the like of the zinc ion battery electrode material are effectively solved, and the cycle performance and the rate capability of the battery can be remarkably improved.