Abstract: Disclosed is a method and device for screening an echelon-use battery. The method includes: collecting a first initial voltage and a first voltage change data of a standard battery of the same batch as a test battery; acquiring a first voltage difference data; acquiring an allowable echelon-use voltage difference range corresponding to the first initial voltage according to the first initial voltage, the first voltage difference data and an allowable echelon-use deviation; collecting a second initial voltage and a second voltage change of the test battery, acquiring a second voltage difference data, when the second initial voltage and the first initial voltage are the same, determining whether the second voltage difference data falls within the allowable echelon-use voltage difference range, the test battery is qualified if the second voltage difference data falls into the range.

Abstract: A method, a device, an equipment and a storage medium for accounting product carbon footprint based on ICM are provided. The method comprises: acquiring data of carbon footprint within a predetermined system boundary range on a production line for several times within one period at a predetermined acquisition interval, according to an obtained acquisition instruction, wherein the data of carbon footprint comprises regional development index, utilization rate of green product and recovery rate of recycled material; and accounting the carbon footprint according to the data of carbon footprint and a predetermined accounting formula for carbon footprint, to obtain an amount of carbon emission within the period, wherein the amount of carbon emission is in negative correlation with a carbon right factor obtained according to the regional development index, the utilization rate of green product and the recovery rate of the recycled material.

Abstract: An ultrasonic vibrating screen includes a bottom frame, at least two screen cylinders, and a vibrating mechanism. An elastic body is provided on the bottom frame; the screen cylinders are arranged in sequence from bottom to top, each screen cylinder is provided with a screen, and one of the screen cylinders is connected with the bottom frame through the elastic body. The vibrating mechanism includes a vibrating frame and at least two ultrasonic transducers, the screen cylinders are all fixed to the vibrating frame, the ultrasonic transducers are fixed to the vibrating frame, and the ultrasonic transducers drive the vibrating frame to vibrate. By fixing all the screen cylinders with the vibrating frame, the amplitudes and frequencies of all ultrasonic transducers which are originally unsynchronized are unified to be the same amplitude and the same frequency as much as possible.

Abstract: The present application provides a preparation method for a positive electrode material precursor having a large channel, and an application thereof. The method comprises: mixing a sodium hexanitrocobaltate aqueous solution, a nickel-manganese mixed salt solution, an oxalic acid solution, and aqueous ammonia for reaction; calcining a solid material; and soaking the calcined material in water to obtain a positive electrode material precursor having a large channel. According to the present application, nickel-cobalt-manganese and sodium-ammonium are co-precipitated and sintered, and then sodium-ammonium is removed; and since the radius of sodium ions is greater than the radius of lithium ions, a large ion channel is left in a nickel-cobalt-manganese precursor framework, thereby facilitating the deintercalation of the lithium ions of a chemically sintered positive electrode material, widening a lithium ion diffusion channel, and remarkably improving the rate capability and the cycle performance of the material.

Abstract: The present disclosure discloses an aluminum-doped cathode material precursor, and a preparation method therefor and use thereof. The preparation method includes: adding a solution of mixed salts of nickel, cobalt, and calcium, a first aluminum-containing alkali solution, aqueous ammonia, and a sodium hydroxide solution to a medium solution to allow a reaction, and subjecting a resulting reaction product to solid-liquid separation (SLS) to obtain a filter cake; soaking the filter cake in a second aluminum-containing alkali solution, and conducting SLS to obtain a solid material; subjecting the solid material to calcination to obtain a calcined material, and soaking the calcined material in water to obtain the aluminum-doped cathode material precursor.

Abstract: Disclosed is a processing device for a lithium battery positive electrode material, including a base, where the base is fixedly provided with barrel bodies by means of a support, a sleeve is rotatably clamped between the two barrel bodies, a stirring assembly transversely penetrates through interiors of the barrel bodies and the sleeve, the base is further provided with a power mechanism, and the power mechanism separately drives the sleeve and the stirring assembly to rotate. Due to the cooperation of the barrel bodies, the sleeve and the stirring assembly, the stirring assembly can effectively scrape attachments on the inner walls of the barrel bodies, and a first stirring blade in the sleeve and a second stirring blade in the stirring assembly are cooperated to stir, gather and further disperse and disarrange the material, such that the material can be mixed more uniformly.

Abstract: The present disclosure discloses a method for recycling a lithium-ion battery electrolyte. After the waste lithium-ion battery is discharged, it is frozen and disassembled to obtain a battery cell containing an electrolyte. The battery cell is immersed in a lithium hydroxide solution containing a catalyst for reaction. The battery cell after the reaction is taken out and washed. The washing solution is mixed with the lithium hydroxide solution after the reaction to obtain a mixed solution. The mixed solution is filtered to obtain a filtrate and a filter residue. The filter residue is reacted with a hydrofluoric acid solution to obtain anhydrous lithium salt. The anhydrous lithium salt is mixed with an organic solution, and PF5 gas is introduced. The mixture is reacted, and filtered to obtain an organic liquid. The organic solution is frozen and filtered to obtain lithium hexafluorophosphate.

Abstract: Embodiments of the present disclosure disclose display panels and display devices. The display panel includes a substrate, a pixel definition layer, a light emitting layer, and partitions. The pixel definition layer includes first grooves and second grooves arranged in a non-light emitting area. Each partition includes a first portion and a second portion connected to each other. The first portion corresponds to the second groove. A width of the second portion is greater than a width of the first portion. The second portion is spaced apart from a surface of the pixel definition layer away from the substrate.

Abstract: Disclosed is an underwater crushing mechanism for an aluminum housing battery, including a crusher, where the top end of the crusher is provided with a feed port, and a crushing mechanism is arranged inside the crusher below the feed port; a water body is stored in an inner cavity of the crusher, and the crushing mechanism is immersed in the water body; the crusher is provided with a spray mechanism; the crusher at the side of the spray mechanism away from the feed port is provided with a channel communicated with the inner cavity of the crusher, an opening is provided at the side of the channel away from the spray mechanism, and at least two crushed material collection chambers are arranged in the crusher at the side of the opening; and a collection frame is movably arranged in the channel.

Abstract: A method for recycling and treating an electrolytic solution of a lithium ion battery includes S1: cooling a fully discharged lithium ion battery below a freezing point of the electrolytic solution, and then disassembling and crushing the lithium ion battery to obtain a crushed solid containing the electrolytic solution, S2: under a protection of an inert gas, placing the crushed solid in a supercritical CO2 extraction instrument in which an entrainer is added; S3: conducting extraction; and S4: collection an extraction product with a cryogenic device, and adsorbing water in the extraction product using a 4 ? type lithiated molecular sieve, adsorbing HF in the extraction product using weak-base anion-exchange resin and adsorbing organic acid and alcohol in the extraction product using a 5 ? type lithiated molecular sieve.

Abstract: Disclosed is an apparatus for efficiently pretreating and recycling a waste battery, which includes a bottom plate, a recycling device, a conveying device and a treatment device, and one end of a top portion of the bottom plate is fixedly mounted with a bottom portion of the conveying device. According to the invention, by arranging a fixing assembly and the recycling device, a suction pump can suck a slurry and an electrolyte in a battery downwardly for dropping, and a driving assembly can rapidly convey the slurry and the electrolyte in the battery to the treatment device for treatment at the same time.

Abstract: A high-voltage ternary positive electrode material includes ternary positive electrode active material particles and a flexible coating body, the flexible coating body being coated on surfaces of the ternary positive electrode active material particles; wherein, the flexible coating body includes a mixture of polyaniline and a polyurethane elastomer.

Abstract: The present disclosure discloses a method for coating a lithium nickel cobalt manganese oxide cathode material, and relates to the technical field of the synthesis of cathode materials. The present disclosure provides a method for coating a lithium nickel cobalt manganese oxide cathode material, comprising the following steps: (1) mixing the lithium nickel cobalt manganese oxide cathode material with a potassium permanganate solution, and introducing an olefin; and (2) after a reaction is completed, a reaction product is dried and calcinated to obtain a manganese-dioxide-coated lithium nickel cobalt manganese oxide cathode material; wherein the number of carbon atoms in the olefin is ?10, and the number of carbon-carbon double bonds in the olefin is 1. By introducing an olefin when mixing a lithium nickel cobalt manganese oxide cathode material with a potassium permanganate solution, directed coating of surface defects is realized.

Abstract: Disclosed is a method for preparing a graphene-based sodium ion battery negative electrode material, including adding graphene oxide into ethanol absolute, carrying out ultrasonic treatment at a certain temperature to obtain a graphene oxide alcohol dispersion, then preparing a sodium hexanitritocobaltate solution, adding the graphene oxide alcohol dispersion into the sodium hexanitritocobaltate solution, carrying out solid-liquid separation to obtain a solid, isolating the solid from oxygen for calcination, and washing and drying to obtain a graphene-based sodium ion battery negative electrode material.

Abstract: A disassembling mechanism for a waste battery module includes a substrate. The substrate is provided with a clamping mechanism, a cutting mechanism, a placement platform, a storage box, a traction mechanism and a linkage mechanism at a top portion. The linkage mechanism includes a sliding rod, a sliding block, a linkage rack and a gear box. The traction mechanism is fixed at one end of the clamping mechanism far away from the placement platform. One end of a traction member of the traction mechanism is connected with the cutting mechanism, and the other end of the traction member is connected with the sliding block.

Abstract: The present invention provides a method for directly preparing nickel sulfate from low nickel matte, a nickel sulfate and an application thereof, the method comprising the following steps: a) pre-treating a low nickel matte to obtain ferronickel powder; b) mixing the ferronickel powder with a sulfuric acid solution, stirring, dissolving, and then evaporating, to obtain a supersaturated sulfate solution; c) cooling the supersaturated sulfate solution to ?5° C.-0° C., and performing suction filtration to obtain an insoluble solid; d) washing the insoluble solid with water, and removing impurities from the filtrate to obtain a nickel hydroxide precipitate; impurity removal comprising successively removing iron, and removing calcium and magnesium; e) washing the nickel hydroxide precipitate with water, acid-dissolving and evaporating to obtain nickel sulfate. The present invention increases the amount of nickel recovered, the purity of nickel sulfate being 18.10%-19.24% nickel, and the recovery rate being 94.

Abstract: Disclosed is an orderly differentiated recycling and processing apparatus for waste batteries, including an apparatus housing, where several crushing cavities are arranged inside the apparatus housing along a length direction, crushing modules are provided inside each of the crushing cavities, servo cavities are provided inside the apparatus housing at both sides of the crushing cavities, several cutting modules are symmetrically arranged inside the servo cavities facing the crushing cavities, and a screen assembly is provided inside the apparatus housing below the crushing module.

Abstract: A carbon emission assessment system for recycling of decommissioned battery includes: an information module configured to obtain operation stages of the recycling of decommissioned battery and an input inventory corresponding to each of the operation stages, an instruction module configured to store a carbon dioxide emission calculation formula and carbon dioxide emission factors of different substances, an accounting module, and an analysis module configured to compare the carbon emission results obtained by the accounting module with a pre-stored standard carbon emission to obtain a comparison result, wherein the accounting module is configured to retrieve the carbon emission calculation formula and the carbon emission factors of different substances in the instruction module, in response to the operation stages and the input inventory in the information module inputted by a user, and to obtain carbon emission results for different operation stages.

Abstract: Disclosed is a method for recovering a waste lithium cobalt oxide battery, the method comprising: feeding a lithium cobalt oxide battery black powder in a column-shaped container, adding a first acid to the column-shaped container for heat leaching until solids in the column-shaped container are not reduced any more so as to obtain a first leachate and leaching residues, wherein the first acid is a weak acid, and a filtering structure is arranged at the bottom of the column-shaped container; and adding a second acid to the column-shaped container containing the leaching residues for heat leaching until solids in the column-shaped container are not reduced any more so as to obtain a second leachate and graphite, wherein the second acid is a strong acid.

Abstract: A reflux unit and a sewage treatment system are disclosed. The reflux unit includes an input section, a treatment section and an output section which are sequentially communicated. The treatment section is configured for deoxidizing a reflux substance input by the input section. The treatment section is at least partially located above an aeration port of an aeration device or the treatment section is attached to a surface of the aeration device.