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2885results about "Waste accumulators reclaiming" patented technology

Comprehensive recovering method of waste lithium iron phosphate battery

The invention provides a comprehensive recovering method of waste lithium iron phosphate batteries, which has simple and reasonable process, low recovering cost and high added value. The method comprises the following steps: utilizing an organic solvent to dissolve an adhesive on battery cell fragments, and realizing the separation of lithium iron phosphate material and clean aluminum and copper foils through screening, wherein the aluminum and copper foils are recovered by smelting; utilizing a NaOH solution to remove residual aluminum foil scraps in the lithium iron phosphate material, and removing graphite and remaining adhesive by heat treatment; after dissolving the lithium iron phosphate with acid, utilizing sodium sulphide to remove copper ions, and utilizing the NaOH solution or ammonia solution to allow iron, lithium and phosphorus ions in the solution to generate sediments; adding iron source, lithium source or phosphorus source compounds to adjust the molar ratio of iron, lithium and phosphorus; and finally adding a carbon source, and obtaining a lithium iron phosphate cathode material through ball milling and calcination in inert atmosphere. After the treatment of the steps, the recovery rate of valuable metals in the batteries is more than 95%, and the comprehensive recovery rate of the lithium iron phosphate cathode material is more than 90%.
Owner:CHERY AUTOMOBILE CO LTD

Method for comprehensively recycling valuable metals from spent lithium ion battery

The invention discloses a method for comprehensively recycling valuable metals from a spent lithium ion battery. The method comprises the following steps: carrying out electric discharge treatment on a spent battery, crushing, pre-roasting at 300-400 DEG C, adding a reducing agent, and carrying out reduction roasting at 450-700 DEG C; carrying out water extraction and evaporative crystallization on fine aggregates obtained through the reduction roasting, so as to obtain a high-purity lithium product, leaching copper, nickel and cobalt from leached slag and roasted lump materials by virtue of ammonia oxide, carrying out magnetic separation and sieving on ammonia leaching slag so as to obtain iron and aluminum enriched products, and carrying out reduction acid leaching, purification and edulcoration on sieved products, so as to obtain a high-purity manganese sulfate solution; and carrying out extraction and selective reverse extraction on ammonia leaching liquid, so as to obtain a high-purity nickel sulfate solution and a high-purity copper sulfate solution, and carrying out vulcanization cobalt precipitation, oxidation acid leaching and extraction purification on raffinate, so as to obtain a high-purity cobalt sulfate solution. The method is high in extraction rate of valuable metals and applicable to the treatment of multiple waste lithium ion battery raw materials and efficient utilization of multiple elements, and sorting is not required.
Owner:GUANGDONG GUANGHUA SCI TECH

Method for recovering and preparing lithium iron phosphate from waste lithium iron phosphate battery

The invention discloses a method for recovering and preparing lithium iron phosphate from waste lithium iron phosphate batteries. The method comprises: 1) dismantling the recovered waste lithium iron phosphate batteries, stripping battery cases, immersing the batteries, separating the electrode plates from the powder material of positive and negative terminals through a method of alternation of ultrasonic and mechanical stirring, taking out the electrode plates and diaphragms, and obtaining mixed liquor; 2) performing a preliminary ball milling to the mixed liquor, and drying the uniformly mixed slurry obtained by the preliminary ball milling; 3) calcining the dried material in oxidizing atmosphere to obtain a recovered material, adding iron source, phosphorous source and optionally new lithium iron phosphate, then adding carbon source, high energy ball milling the obtained material, drying the material to obtain a pre-burning material of the recovered material; 4) microwave sintering or solid state sintering the pre-burning material of the recovered material in protective atmosphere to obtain the product of lithium iron phosphate. The preparation method has the advantages of environmental protection, no pollution, simpleness and practicality, high production utilization rate, simple
Owner:ZHEJIANG UNIV

Recycling method for valuable metal from waste nickel-cobalt-manganese lithium ion battery

The invention relates to a method for recycling valuable metal from a waste nickel-cobalt-manganese lithium ion battery. The method comprises the following steps of: dismounting, discharging and crushing the battery, soaking crushed waste nickel-cobalt-manganese lithium ions into sulfuric acid with certain concentration, adding a reducing agent to strip positive and negative pole pieces, and leaching valuable metals of nickel, cobalt, manganese and lithium; and replacing leach liquor with iron powder to remove copper, carrying out hydrolyzing to remove iron and aluminum, and dosing an impurity-removed solution to synthesize an aluminum coated nickel, cobalt and manganese ternary positive electrode material precursor, evaporating and concentrating the synthesized solution, adding carbonateor introducing carbon dioxide to recycle lithium. According to the method disclosed by the invention, stripping and leaching are synchronously completed, chemical precipitation is performed to removecopper, iron and aluminum, slag amount is small, slag filter performances are good, and the impurity-removed solution is used for synthesizing the aluminum coated nickel, cobalt and manganese ternaryprecursor, so that the recovery rate of valuable metal is increased; and the recovery rate for nickel, cobalt and manganese is 96% or higher in the whole process, the total recovery rate of lithium is90% or higher, the technological process is short, operation is simple, equipment is less, and the cost is low.
Owner:JINCHUAN GROUP LIMITED +1

Full-component resource reclamation method for waste positive electrode materials of lithium ion batteries

The invention provides a full-component resource reclamation method for waste positive electrode materials of lithium ion batteries. The method comprises the following steps: 1) separating active substances and aluminum foils in waste positive electrode materials of lithium ion batteries by using an aqueous solution of fluorine-containing organic acid and carrying out liquid-solid-solid separation so as to obtain leachate, the lithium-containing active substances and the aluminum foils; 2) respectively carrying out high temperature roasting and impurity removal with alkali liquor on the lithium-containing active substances; 3) respectively carrying out recovery of the fluorine-containing organic acid through addition of acid and distillation, deposition of impurity ions through addition of alkali and ammonium carbonate coprecipitation on the leachate so as to prepare nickel-cobalt-manganese carbonate ternary precursor; and 4) carrying out component regulation on a mixture of the treated active substances and the nickel-cobalt-manganese carbonate ternary precursor, adding lithium carbonate in a certain proportion and carrying out high temperature solid phase sintering so as to prepare a lithium nickel cobalt manganese oxide ternary positive electrode material. The method provided in the invention has the following advantages: the application scope of the method is wide; separation efficiency of the lithium-containing active substances and the aluminum foils is high; short-flow direct re-preparation of positive electrode materials in waste lithium ion batteries is realized; and the method is applicable to large-scale resource reclamation of waste lithium ion batteries.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Method for separating and recovering lithium and cobalt from positive electrode material of lithium battery

The invention provides a method for separating and recovering lithium and cobalt from a positive electrode material of a lithium battery. The method comprises the following: (1) a step of physical disassembly and alkaline leaching; (2) a step of roasting and washing, namely adding sulfate into a black solid material containing lithium cobalt oxide obtained in the step (1) in the weight ratio of the black solid material to the sulfate being 1:(0.8-1.2), mixing, roasting for 2 to 6 hours at a temperature of between 600 and 800 DEG C, cooling, adding a cleaning solution in terms of the ratio of solid to liquid being 1:(3-5) to wash, agitating for 1 to 2 hours at a temperature of between 60 and 80 DEG C and filtering to obtain Li<+>-containing filtrate and filter residue containing lithium and a small amount of cobalt; (3) a step of reducing and acid saluting; and (4) a step of extracting the cobalt to obtain pure Co2<+> solution. By the method, high recovery ratios of the metal lithium and the metal cobalt are achieved, the recovery ratio of the lithium is over 90 percent, the obtained lithium and the obtained cobalt have high purity, the content of the lithium mixed in the cobalt isgreatly reduced, and the purity of the cobalt can reach over 99.5 percent. Therefore, the method has higher economic benefits and social benefits.
Owner:JINGMEN GEM NEW MATERIAL +1

Waste energy echelon utilization method of power battery for electric vehicle

The invention discloses a waste energy echelon utilization method of a power battery for an electric vehicle. The waste energy echelon utilization method of the power battery for the electric vehicle comprises the following steps: firstly, a waste power battery set is disassembled; secondly, performance detection is conducted on battery monomers without damaged appearance to screen out battery monomers capable of being directly used and ensure that a fifth step is accessed, the battery monomers capable of being repaired and reused are screened out, and processed in a third step, and unrepairable battery monomers are processed in a discarded mode; thirdly, the battery monomers capable of being repaired and reused are repaired; fourthly, performance detection is conducted on repaired battery monomers to screen out battery monomers with the difference of nominal voltage and virtual voltage not larger than 0.02V and the virtual capacity not lower than 70% of nominal capacity, the battery monomers with the difference of the nominal voltage and the virtual voltage not larger than 0.02V and the virtual capacity not lower than 70% of the nominal capacity are processed according to the next step, and the repaired battery monomers not capable of reaching the standards are processed in a discarded mode; and fifthly, a new power battery set is assembled. Because waste capacity of a monomer battery of the power battery is reasonably utilized, and is recombined to a new power battery applied to different occasions, the waste energy echelon utilization method of the power battery for the electric vehicle not only satisfies requirements of using occasions, but also utilizes performance of the power batteries.
Owner:GUANGDONG BRUNP RECYCLING TECH +1

Method for recycling lithium, nickel, cobalt and manganese from waste ternary anode material

The invention discloses a method for recycling lithium, nickel, cobalt and manganese from a waste ternary anode material. The method comprises the steps of with the waste ternary anode material as theraw material, adding a carbon reducing agent, carrying out mixing and dosing, carrying out roasting reduction at 500-700 DEG C in a protective atmosphere, adding the roasted product into water, carrying out water-soluble reaction, after the reaction is finished, filtering to obtain lithium carbonate filtrate and a filter residue I, carrying out sulfuric acid leaching on the filter residue I so asto obtain a filtrate containing nickel, cobalt and manganese and a filter residue II, adding sulfate so as to adjust the proportion of nickel, cobalt to manganese in the filtrate containing nickel, cobalt and manganese, carrying out precipitation reaction on the filtrate containing nickel, cobalt and manganese, a sodium hydroxide solution and an ammonia water solution in the protective atmosphere, controlling the reaction temperature at 50-70 DEG C and the pH value at 10-11, obtaining ternary precursor slurry after the precipitation reaction, filtering, washing, and drying, so as to obtain the ternary precursor. The method has the beneficial effects that the separation condition of lithium carbonate is simple, the costs of leaching processes of nickel, cobalt and manganese and the regeneration process of the ternary material precursor are low, and the recycling rate is high.
Owner:HUNAN UNIV OF TECH

Method for recycling waste lithium cobalt oxide lithium ion battery

The invention relates to a method for recycling waste lithium cobalt oxide lithium ion battery. The method is characterized in that valuable components in the waste lithium ion battery are completely recycled by integrating the processes of crushing by a punch press, magnetic separation, eddy current selection, anaerobic atmospheric roasting, temperature-variable filtering and the like, and products with the relatively high additional values, such as elemental crude cobalt, lithium carbonate, graphite, copper, aluminum, iron, and plastics are obtained. Manners of crushing by a punch press, magnetic separation, eddy current selection and the like are adopted for performing material separation, so that the original physical properties of materials are kept. Meanwhile, positive powder and negative powder of an electrode material are cooperatively treated, the negative graphite material is effectively utilized, the in-situ preparation of a resource can be realized, and the waste lithium ion battery can be relatively completely recycled. The anaerobic atmospheric roasting is adopted, so that the reaction condition is relatively loose, the loss of a graphite material is reduced, the cost is saved, the technological flow is simplified, and the industrial application practice can be facilitated.
Owner:SHANGHAI JIAO TONG UNIV

Method for recycling battery-grade iron phosphate in lithium iron phosphate battery and preparing lithium iron phosphate positive material by utilizing waste lithium ion phosphate battery

The invention relates to a method for recycling battery-grade iron phosphate in a lithium iron phosphate battery and preparing a lithium iron phosphate positive material by utilizing a waste lithium ion phosphate battery, and relates to a method for recycling a battery and preparing the battery positive material by utilizing the waste battery recycled material, solving the problems of the traditional method for recycling the LiFePO4 lithium ion battery positive electrode that the purity of the obtained element or substances is low and the obtained element or substances cannot be used for preparing the LiFePO4 lithium ion battery positive electrode. The method comprises the steps: I, crushing a positive pole piece, and carrying out heat treatment; II, dissolving the crushed positive pole piece in an acid solution; III, charging a surface active agent; IV, charging an alkaline solution, thereby obtaining a battery-grade iron phosphate; V, charging sodium carbonate to obtain a lithium carbonate; VI, mixing iron phosphate, lithium carbonate and a carbon source reduction agent; and VII, calcining. In the process for recycling the battery-grade iron phosphate in the lithium iron phosphate battery and preparing the lithium iron phosphate positive material by utilizing the waste lithium iron phosphate battery, no secondary pollution is produced, and the comprehensive and high-added-value recycling of the waste lithium iron phosphate battery can be realized.
Owner:HARBIN INST OF TECH

Comprehensive recycling method of waste and old lithium-ion battery

The invention provides a comprehensive recycling method of a waste and old lithium-ion battery, and relates to the lithium-ion battery. The method comprises the following steps of: performing explosion-proof magnetic smashing and atomized spraying smashing on the waste and old lithium-ion battery, thereby separating an outer shell and a battery material; carbonizing and roasting in a constant-temperature roaster at high temperature and under negative pressure, thereby removing an isolated membrane and a cathode; recycling the outer shell and an anode material in a grading manner by using a centrifugal disintegrator, thereby separating the outer shell and the anode material containing nickel and cobalt; leaching out by adding sodium sulfite into H2SO4 at the normal pressure by utilizing the characteristics of the anode material; regulating the pH value by adding carbonate into an leaching liquid; preliminarily removing Ca and Mg by adding a fluoride salt; extracting and removing impurities by using P2O4, thereby removing the impurities such as Fe, Cu, Zn, Ca, Mg and the like; performing selective extraction for cobalt-nickel separation by using P507, thereby obtaining a high-purity nickel sulfate solution and a high-purity cobalt sulfate solution in which the content of the Fe, the Cu, the Zn, the Ca and the Mg is respectively less than or equal to 2.0mg/L. The method is efficient, simple and convenient and low in production cost, and has wide applicability and a high additional value.
Owner:XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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