1770 results about "Battery electrode" patented technology

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.

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.

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 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 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.

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.

This application provides a battery electrode detection and control system that can improve the yield of electrode sheets. The electrode detection and control system is applied to an electrode coating system, which includes an unwinding device, a first-side coating device, a first-side drying device, and a winding device arranged in sequence. The electrode detection and control system includes a first detection device disposed between the unwinding device and the first-side coating device. The first detection device is used to detect the size of the area to be coated on the first surface of the electrode substrate output by the unwinding device, wherein the first surface is perpendicular to the thickness direction of the electrode substrate.

The present application relates to the technical field of lead-acid battery electrode, aiming at the problem of thick lead paste on the existing lead-acid battery plate, large resistance during charging and poor rate discharge performance of the battery, a preparation method of lead-acid battery membrane electrode is disclosed, comprising the following steps: adding a binder to the prepared lead paste, rolling the lead paste containing the binder on the lead skin to form a lead paste film layer, immersing the lead skin and the attached lead paste film layer in a sulfuric acid solution, and solidifying and drying after taking out; the binder is polytetrafluoroethylene emulsion or a binder containing polytetrafluoroethylene emulsion. Unlike the high molecular film attached to the surface of the lead-acid battery plate in the prior art, the present application obtains a thin film electrode with thin thickness, uniform active material dispersion, large active material and current collector contact area and good conductivity, and has the advantages of large rate charge and discharge cycle.

The riveting structure of an electrode terminal for a battery includes a battery housing having a bottom; an electrode terminal riveted through a hole formed in the bottom of the battery housing; and a gasket between the electrode terminal and the battery housing. Also, the electrode terminal includes a body portion inserted into the hole; an outer flange portion extending along an outer surface of the bottom of the battery housing from a first side of the body portion exposed through the outer surface; an inner flange portion extending toward an inner surface of the bottom of the battery housing from a second side of the body portion exposed through the inner surface; and a flat portion on the second side of the body portion.

The invention discloses an electrode health diagnosis method for a silicon-carbon negative electrode battery with a self-adaptive voltage range, and relates to the technical field of battery control, and the method comprises the steps: obtaining a quasi-static open-circuit voltage discharge curve according to a low-rate discharge test of the silicon-carbon negative electrode battery in an aging process, and measuring the total battery capacity; analyzing and extracting the silicon content in the battery; reconstructing a silicon-carbon composite electrode curve according to the silicon content, and performing inversion calculation of a voltage reconstruction model to obtain electrode parameters; the method comprises the following steps: acquiring charging fragment data of a silicon-carbon negative electrode battery in a circulation process, extracting charging time sequence characteristics based on equal interval voltage alignment and relaxation voltage characteristics after full charge according to the charging fragment data, and constructing a corresponding binary mask array; and constructing an estimation model, and performing supervised learning to obtain a trained estimation model for performing diagnosis of the electrode health parameters according to the charging fragment data, thereby effectively improving adaptability and accuracy during electrode health diagnosis.

The invention discloses a storage battery electrode plate strength test system, and relates to the field of electrode plate strength test.The storage battery electrode plate strength test system comprises a multi-angle tool device and an array type impact test device.The multi-angle tool device comprises a base, a first tool platform, a second tool platform and a tool side plate, the first tool platform is rotationally installed on the base, and the second tool platform is rotationally installed on the tool side plate; the second tool platform is rotationally installed on the first tool platform, the rotation axis of the first tool platform is perpendicular to the rotation axis of the second tool platform on the horizontal plane, the array type impact testing device comprises an impact bottom plate, a lifting driving plate and impact rods, the impact rods are arranged on the impact bottom plate in a sliding and penetrating mode, and the impact rods are arranged in a rectangular array mode. The lifting driving plate is arranged above the impact bottom plate, a plurality of driving columns are arranged on the lifting driving plate in a rectangular array mode, each driving column is provided with an impact rod, the driving columns are detachably connected with the impact rods, simulation is conducted by accurately adjusting the tool angle, and it is ensured that a test scene is highly matched with the actual working condition.

A powder dispensing apparatus having an elongate wedge-shaped hopper including one or more fluidized plates is described. The powder dispensing apparatus can be positioned above a pair of calender rolls to distribute a powder, such as a dry electrode material onto the calender rolls. Such fluidized wedge shaped hopper advantageously allows for an accurate and / or controlled rate of powder distribution across or substantially across the length of a calender roll.

A power system including at least a lithium-sulfur (Li—S) battery module or pack and a second battery module or pack, different than the Li—S module or pack in composition, structure, or configuration, wherein (i) at least one of the Li—S module or pack and the second battery module or pack includes a first set of multiple bipolar electrodes internally connected in series; and (ii) the at least a lithium-sulfur (Li—S) battery module or pack and the second battery module or pack are internally or externally connected in parallel to form a power source. The power source May be connected in parallel to a supercapacitor, a fuel cell, a high-power battery, etc. The power system may further contain a controller, a DC / DC converter and / or a high-voltage bus electrically communicating with the controller. The power system may be used to power a vehicle or other device.

A positioning apparatus includes a support structure including a top plate and legs extending downward from four corners of the top plate; a hoisting unit including a first hoisting plate, piston members, a second hoisting plate, two pressing blocks, and a first actuator; and a clamping unit including two opposite second actuators and two pushing blocks. The positioning apparatus is used for cell electrode plate groups of a lead-acid battery.

The invention provides a battery pole piece coating abnormity detection method and system based on double-sided thickness. The method comprises the following steps: coating a first surface of a battery base material to obtain a first surface pole piece; when a coating initial position is marked, detecting the first surface pole piece based on the first optical contour sensing device array to obtain a first thickness sequence; coating the second surface of the first surface pole piece base material to obtain a second surface pole piece; when a coating initial position is identified, detecting a second surface pole piece based on a second optical contour sensing device array to obtain a second thickness sequence; and obtaining a thickness characteristic parameter through the first thickness sequence and the second thickness sequence, and comparing the thickness characteristic parameter with a preset threshold value to judge whether the coating area of the base material is abnormal or not. According to the method, the coating quality of the whole area of the two surfaces of the pole piece can be detected in real time, and coating abnormity can be found in time.

The present application belongs to the technical field of batteries. Provided are a battery cell, a battery and an electric device. The battery cell comprises a battery electrode sheet. The battery electrode sheet comprises a current collector, an active layer, a first insulating layer and a second insulating layer, wherein a connecting surface is formed on the current collector; the active layer covers part of the connecting surface, and a first edge is formed on the connecting surface; the first insulating layer covers part of the connecting surface, and the first insulating layer is arranged to extend along the first edge; and the second insulating layer covers the first insulating layer. The present application aims to reduce the risk of burr exposure during electrode sheet die-cutting, thereby reducing the risk of short circuits in battery cells.

The invention discloses a three-dimensional porous carbon encapsulated V2O5 carbon fiber electrode constructed by in-situ growth and a preparation method and application thereof, belongs to the technical field of aluminum ion battery positive electrode materials, and aims to solve the problems that the intercalation and deintercalation dynamics of AlCl4 in a polyacrylonitrile (Pan)-based carbon fiber is blocked due to disordered graphite structure, and the performance of the Pan-based carbon fiber is influenced. And the material cannot be used as an effective electrode material to be applied to an aluminum ion battery system. According to the preparation method, an in-situ growth technology is adopted, a three-dimensional porous carbon substrate is grown on the surface of carbon fiber, then an orthorhombic system vanadium pentoxide (V2O5) nano material which has high theoretical specific capacity and can realize large-current charging and discharging is packaged in the three-dimensional porous carbon substrate, and the V2O5-based carbon fiber electrode is prepared. According to the electrode, the electrostatic interaction between Al < 3 + > ions and crystal lattices is effectively relieved, the structural advantages of the carbon fibers and the energy storage performance of V2O5 are fully combined, the energy storage effect of the aluminum ion battery is remarkably improved, and a new effective scheme is provided for development of aluminum ion battery electrode materials.

The invention discloses a high-temperature-resistant benzimidazolone polyamide imide battery binder as well as a preparation method and application thereof, and belongs to the technical field of battery materials. The high-temperature-resistant benzimidazolone polyamideimide battery binder with uniformly distributed amide segments and imide segments is prepared through a method for activating aromatic diamine on one side of trimethylchlorosilane and changing the activity of amino groups on the two sides, the comprehensive performance of the high-temperature-resistant benzimidazolone polyamideimide battery binder is excellent, the defects that a traditional binder is poor in heat resistance and insufficient in chemical stability are overcome, and the service life of the high-temperature-resistant benzimidazolone polyamideimide battery binder is prolonged. The introduction of high-polarity groups can improve the wettability and ion transmission capability of the electrolyte, improve the solubility of the electrolyte so as to facilitate electrode forming, and can also form strong chemical bonds or physical adsorption with positive and negative inorganic active materials during application, thereby reducing the structural damage in the cycle process and improving the electrochemical performance of the battery. The lithium ion battery electrode can keep a stable structure in a high-temperature environment, the thermal runaway risk caused by high temperature is remarkably reduced, and the application requirements of the lithium ion battery in a fast charging or high-temperature energy storage scene are well met.

The invention discloses a battery electrolyte and a preparation method thereof, an aqueous zinc-iodine battery and terminal equipment. The battery electrolyte comprises an additive, an electrolyte and a solvent, the additive contains an amino functional group, and the concentration of the additive is 0.1 g / L-0. 5 g / L. In addition, the additive can also utilize a nitrogen-containing functional group to reduce the shuttle effect of polyiodide and prevent the loss of an iodine positive active material, so that the electrode of the zinc ion battery is protected, and the cycle life of the zinc ion battery is remarkably prolonged (the capacity is about 20mAh / g higher than that of an electrolyte without L-tyrosine).

This invention discloses a positive electrode material and its preparation method, as well as a lithium-ion battery, relating to the field of lithium-ion battery electrode materials. The preparation method of the positive electrode material includes: (1) mixing positive electrode raw materials, binder, and dispersant uniformly in a weight ratio of 10:(0.2-2):(10-50) to obtain a slurry; (2) spray-drying the slurry to obtain a powder; and (3) sintering the powder using a fluidized bed. The binder is selected from one or more of starch, PVP, PEG, PVA, and PAN, and the dispersant is selected from one or more of ethanol, isopropanol, and water. Implementing this invention can reduce the sintering temperature of the positive electrode material, shorten its sintering reaction time, and improve its sintering quality. Specifically, the sintering time of the positive electrode material of this invention can be shortened to 2-60 min.

A system for drying a battery electrode coating includes two laser diode arrays and a laser module. Each laser diode array emits multi-beam laser radiation to an edge region including a respective edge of a coating lane deposited on a metal foil. The laser module emits a diverging laser beam to an interior area of the coating lane between the two edges. The intensity distribution of the diverging laser beam at the coating lane spans a gap in the widthwise dimension between respective intensity distributions of the multi-beam laser radiation from the two laser diode arrays. The use of laser diode arrays to perform the edge drying allows for tailoring the intensity distribution of the combined laser irradiation to dry the coating lane without over-drying and delaminating the edges. The use of a single, diverging laser beam in the interior area allows for optimizing affordability and energy efficiency.

A by-product deposit removal device is provided that can enhance the effect of removing by-product deposits that occur on the electrodes of a storage battery. [Solution] The by-product deposit removal device includes an electrode connection part connected to the electrodes of a storage battery, and a removal signal generation part that generates a by-product deposit removal signal using current extracted from the electrodes of the storage battery via the electrode connection part. The removal signal consists of a periodic pulse current, and when the amplitude value of the rising edge of a single pulse current waveform of the removal signal is H1 and the amplitude value of the undershoot after the falling edge of the pulse current waveform is H2, H2 is 0.2 to 1.0 times H1. Furthermore, when the time width of the rising edge of the pulse current waveform is T1 and the time width of the falling edge accompanied by an undershoot is T2, T2 is 0.02 to 0.2 times T1.

An example electrode for a battery is provided, as well as a system and method for fabrication of an electrode for the battery. The electrode includes an electrically conductive substrate defining a first surface and a second surface. The electrode includes a pattern of an active material coating formed on at least one of the first or second surface of the electrically conductive substrate. The pattern includes coated and uncoated areas formed by depositing an active material dry powder onto at least one of the first surface or the second surface of the electrically conductive substrate via electrostatic spray deposition during movement of the electrically conductive substrate, and selectively removing at least a portion of the active material dry powder from at least one of the first surface or the second surface of the electrically conductive substrate with a powder removing assembly to create the uncoated areas of the pattern.

The invention discloses a TOPCon solar cell electrode electroplating technology, and relates to the field of solar cell technology materials, and the technology comprises the following operation steps: S1, carrying out laser grooving on a front surface layer and a back surface layer of an N-type silicon wafer, forming a front surface grid line pattern and a back surface grid line pattern, and exposing a p + emitter and an n + field region; s2, pre-cleaning a slotted region of the n + field region; s3, putting the N-type silicon wafer into an electroplating device I for electroplating; s4, pre-cleaning the p + emitter slotting region; s5, putting the N-type silicon wafer into an electroplating device II for electroplating; and S6, performing high-temperature annealing on the N-type silicon wafer. According to the TOPCon solar cell electrode electroplating process, the copper and nickel electroplating technology is utilized, the use of silver paste can be reduced or omitted, the non-silicon cost in the cell manufacturing process can be reduced, and the problem that the silver valence is out of control due to the increase of the photovoltaic solar silver consumption can be relieved and improved.

The invention discloses a battery internal strain real-time monitoring device, a preparation method and a monitoring method, and belongs to the technical field of secondary ion batteries. The monitoring device comprises an optical fiber, a current collector and a battery electrode slurry layer, the optical fiber is embedded into the surface of the current collector, and the electrode slurry layer is fixed on the surface of the current collector. The optical fiber is pressed into the current collector through the roller press, then the electrode slurry is poured, and the battery internal strain real-time monitoring device is obtained after drying. The monitoring device serves as a part of battery electrode preparation, the positive electrode and the negative electrode of the battery are connected with the charging and discharging tester, the optical fiber welding jumper wire in the monitoring device is connected with the optical fiber demodulator to form a complete monitoring system, and the optical fiber demodulator collects Bragg wavelength changes and can obtain changes of internal stress of the battery. The device is scientific, reasonable in structure and simple in process, and can realize in-situ, real-time and high-precision monitoring of the internal stress change of the positive battery electrode caused by volume expansion / shrinkage in the charging and discharging process.