7826results about "Battery recycling" patented technology

The invention discloses an intelligent optimization control system and method for a battery material recovery and preparation process, and relates to the technical field of intelligent control. Training sample data and a training quality prediction model in the battery material recovery and preparation process in a test environment are collected, and then a state space, an action space and a reward function of a deep reinforcement learning model are constructed; fusing the prediction result of the quality prediction model and the monitoring data of the sensor in a test environment through a feature fusion strategy, generating a fusion process representation vector, inputting the fusion process representation vector into a deep reinforcement learning model, training the deep reinforcement learning model, and obtaining a fusion process representation vector; based on the real-time sensor data, the quality prediction model and the deep reinforcement learning model, obtaining an action output by the deep reinforcement learning model, and performing parameter regulation and control on the to-be-monitored recovery preparation process by taking the action as an optimization strategy; the production energy consumption is effectively reduced, and the resource utilization efficiency is improved.

The invention relates to a waste lithium iron phosphate battery recycling method, in particular to a graded recycling method for lithium, iron, phosphorus and graphite in a waste lithium iron phosphate battery, and belongs to the technical field of lithium ion batteries and resource recycling of the lithium ion batteries. According to the method, the mode that oxidizing roasting and selective leaching are combined is adopted, the leaching rate and selectivity of lithium are effectively improved, the leaching rate of the lithium element is close to 100% under the optimized condition, and limit recovery of the lithium element is achieved; meanwhile, aiming at the problem that iron and phosphorus in the leaching residues are difficult to utilize, a wet ball milling and secondary acid leaching method is combined, phosphorus and iron elements are separated from negative electrode graphite firstly, and graded recovery of iron, phosphorus and graphite is achieved. According to the method, the high recovery rate of lithium is realized, and meanwhile, high-added-value products such as ferric oxide and sodium phosphate are prepared by efficiently recovering ferric phosphate.

The invention provides a method for preferentially extracting lithium from battery black powder, and relates to the field of battery recovery. The method comprises the following steps: mixing battery black powder with water and acid liquor, carrying out lithium extraction reaction on the battery black powder under the conditions of pressurization and heating to obtain reacted slurry, and carrying out solid-liquid separation to obtain a lithium-rich solution and residues; the battery black powder comprises at least one of waste ternary lithium ion battery positive electrode powder, waste ternary lithium ion battery positive and negative electrode mixed powder and waste lithium iron phosphate battery black powder. According to the method for preferentially extracting the lithium from the battery black powder, operation steps are simplified, energy consumption is reduced, efficient and preferential recovery of the lithium is achieved, the recovery rate of the lithium and the separation efficiency of the lithium and nickel / cobalt / manganese are remarkably improved, the lithium leaching rate can reach 96.5% or above, and the nickel-cobalt-manganese leaching rate is lt; and 0.5%.

The invention discloses a method for recycling lithium in a lithium battery, and belongs to the field of lithium battery recycling. The method comprises the following steps: decomposing the lithium battery, and performing pyrolysis treatment at 200-500 DEG C to obtain a slag material; the slag charge is placed in a composite leaching agent, the pH is adjusted to 1.5-2.5, lithium in the slag charge is leached out, and a leaching solution is obtained; the composite leaching agent comprises oxalic acid, an amino acid ligand, persulfate and fluorine ions; adjusting the pH value of the leaching solution to 5.5-6.2, adding an extracting agent into the leaching solution, extracting lithium ions in the leaching solution, and separating to obtain a lithium-rich organic phase and lithium-containing waste liquid; the extraction agent comprises crown ether and organophosphate; and the lithium-rich organic phase is subjected to back extraction, so that lithium ions are released from the organic phase, a lithium-rich back extraction solution is obtained, a carbonate solution is added into the lithium-rich back extraction solution, and lithium carbonate precipitates are obtained. According to the method for recycling the lithium in the lithium battery, selective leaching of the lithium can be achieved, and the comprehensive yield of the lithium in the lithium battery is increased.

The invention relates to the technical field of battery recovery monitoring, in particular to a discharge crushing environmental data monitoring system for battery recovery. The system comprises a data acquisition module used for obtaining a sequence corresponding to each dimension based on environment data of different dimensions in the battery crushing equipment; the sample space construction module is used for screening the dimensions to obtain to-be-analyzed dimensions and constructing a sample space; the clustering analysis module is used for clustering the data points in the sample space to obtain clusters; judging whether the data points in each cluster are suspected abnormal data points or not; the abnormal degree acquisition module is used for clustering all the suspected abnormal data points in a time sequence to obtain a time sequence cluster and an abnormal degree; and the monitoring module is used for acquiring the comprehensive abnormal degree and judging whether the discharge breakage of the battery is abnormal or not based on the comprehensive abnormal degree. The condition of the old battery discharge crushing process can be accurately monitored.

The invention discloses a solid-phase sintering repair method of a waste lithium iron phosphate battery material, and relates to the related field of battery recovery and repair, and the method comprises the following steps: disassembling the waste lithium iron phosphate battery material, taking out a battery positive plate, cleaning, drying and separating a positive material; a spectrograph is adopted for component analysis, the element component content is determined, and raw material adding and supplementing are conducted based on the deviation value of the theoretical element proportion; based on the characteristic information, sectional type sintering scheme analysis is conducted, and solid-phase sintering repair scheme parameters are obtained; the mixed lithium iron phosphate powder is pressed into a sheet shape and placed in sintering equipment for solid-phase sintering repairing treatment, and a repairing sample is obtained; and obtaining test performance parameters according to a battery application detection standard, and performing repair compensation control on the repair scheme parameters. The technical problem that the repairing effect is uncontrollable due to lack of precise analysis and targeted optimization in existing solid-phase sintering repairing is solved, and the technical effects of efficient repairing and performance improvement are achieved.

A method for recycling waste lithium iron phosphate, belonging to the technical field of material recycling. The method specifically separately reprocesses the precipitate and leachate obtained by separating and leaching waste lithium iron phosphate powder, using membrane concentration to highly enrich the lithium ions in the leachate and fully utilizing the filtrate generated during the treatment process, and ultimately can simultaneously and efficiently recover and obtain lithium salt and iron phosphate products. The entire method can achieve a lithium recovery rate of 95% or greater for waste lithium iron phosphate, the maximum concentration of impurity elements in the obtained iron phosphate not exceeding 5 ppm, and the quality of the iron phosphate product being relatively high.

The invention provides a preparation method for regenerating waste lithium iron phosphate into sodium ferric pyrophosphate, and belongs to the technical field of battery material production.The recovery process comprises the steps that a high-grade oxide serves as an oxidizing agent, a waste lithium iron phosphate positive electrode material and a current collector are stripped under the acid or strong alkaline condition, and lithium iron phosphate is oxidized; recovering to obtain iron phosphate containing impurities and a solution containing lithium ions; in the regeneration process, recycling slag obtained in the recycling process is uniformly mixed with a sodium source and a phosphorus source, sintering regeneration is performed to prepare ferric sodium pyrophosphate, conductive carbon in waste lithium iron phosphate is used as a reducing agent, and a high-performance ferric sodium pyrophosphate positive electrode material is obtained without an additional reducing agent; recycled slag obtained in the recycling process mainly comprises high-purity iron phosphate, and the content of impurities can be controlled to be 0.1% or below by controlling the solid-to-liquid ratio, the temperature and the reaction time in the recycling process.

The invention discloses a refined disassembly system and method for a battery monomer, and belongs to the technical field of battery disassembly. The production line comprises a perforating device, a cutting device, a cutting device, a scattering device, a sorting device, a color sorting device, a defluorination device and a powder removal device. The method comprises the following steps: perforating a battery to discharge electrolyte, separating a shell from an inner core by a cutting device, cutting the inner core by a cutting device, scattering by a scattering device, sorting a diaphragm by a sorting device, sorting positive and negative electrode materials by a color sorting device, and respectively removing fluorine by a defluorination device. And finally, the metal foil and the powder are separated through the powder removing device, the damage degree of the crystal structure of the black powder can be reduced, the black powder and the metal fragments are efficiently separated according to the density difference, the metal foil and the black powder are not likely to be excessively mixed, the separation purity is high, the secondary treatment situation is reduced, efficient separation and recycling of the electrode material are achieved, and the production cost is reduced. And the comprehensive function and the resource utilization rate of the system are obviously improved.

The present disclosure relates to the field of sodium-ion battery technology, and specifically, to a method for preparing carbon-coated sodium iron fluorophosphate from waste lithium iron phosphate and the application thereof. The method for preparing carbon-coated sodium iron fluorophosphate from waste lithium iron phosphate includes: mixing a waste lithium iron phosphate material with an alkaline solution for reaction, followed by solid-liquid separation, to obtain an aluminum-containing filtrate and a lithium iron phosphate filter residue; mixing the lithium iron phosphate filter residue, aluminum chloride and sodium chloride uniformly, followed by vacuum calcination, to obtain a calcination material; and mixing the calcination material with at least one of a sodium source, an iron source and a phosphorus source uniformly to obtain a mixture to which a fluorine source, a carbon source and a solvent are added for uniformly mixing, followed by drying and calcination sequentially to obtain the carbon-coated sodium iron fluorophosphate. The method has the advantages of low costs, a high added value, a short process, and a high recovery rate, and the carbon-coated sodium iron fluorophosphate obtained from the method has excellent electrochemical performance.

A process for the direct recycling of cathode and anode materials from electrode scrap, generated as production waste from lithium-ion battery manufacturing, is to be provided that enables the recycling of electrode scrap from LIB production through mechanical stress without negatively altering the active materials, so that it can be reintroduced into production. This is achieved by pre-shredding the electrode scrap into bulk material prior to the mechanical stress and by performing the mechanical stress under cryogenic conditions, where the temperature leads to partial embrittlement or embrittlement of the binder.

The invention discloses a salt leaching-extraction method for recycling lithium iron phosphate and ternary lithium battery powder through cascade circulation, and belongs to the technical field of waste lithium battery recycling. According to the method, ferric salt is adopted as a leaching agent, a circulation mechanism is constructed through iron ion valence state conversion, and cascade leaching circulation of waste lithium iron phosphate and nickel cobalt lithium manganate battery powder is achieved. A concentrated enrichment liquid containing lithium, nickel, cobalt and manganese, iron phosphate and a graphite crude product can be obtained through multiple leaching cycles. In the leaching circulation process, a mixed solvent is developed as an extraction agent of iron ions, and after extraction and hydrochloric acid reverse extraction are carried out on a leaching solution containing iron salt, the leaching agent and the extraction agent can be recycled. According to the method, the valuable metal in the waste battery powder is efficiently leached under the milder reaction condition, consumption of chemicals such as acid and alkali, a leaching agent, an oxidizing agent and an extracting agent is effectively reduced through research of a circulation mechanism, the cost is remarkably reduced, and good environmental benefits and economic benefits are achieved.

The present application provides a method for recovering waste electrolyte of lithium-ion batteries, wherein the waste electrolyte contains lithium hexafluorophosphate, comprising the following steps: S1: adding a saline solution as an extractant to the collected waste electrolyte for extraction, separating a lower organic solution and an upper aqueous solution, and recovering the lower organic solution to obtain an organic solvent; S2: adding a water-soluble carbonate and / or a water-soluble phosphate to the upper aqueous solution in step S1, filtering, and separating to obtain a lithium precipitate. The recovery method can achieve efficient separation and recovery of organic solvents and lithium elements in waste electrolytes, is simple and easy to operate, is economical and environmentally friendly, has strong applicability, and can be prepared and produced on a large scale.

The invention discloses a refined disassembly and recovery production line for retired lithium batteries. Comprising an automatic battery feeding station, a battery pretreatment station, a battery discharging station, an electrolyte collecting station, a battery shell disassembling station, a roll core film removing station, a pole piece separating station, a pole piece conveying station, a crushing feeding station, a crushing station, a crushing conveying station, a first-stage separating station, a high-temperature drying station, a drying discharging station and a second-stage separating station. The automatic battery feeding station is connected with the battery pretreatment station, and the battery pretreatment station is connected with the battery discharging station. The refined disassembly and recovery production line for the retired lithium battery is provided with deep discharge equipment, the safety problem of electrified crushing or manual disassembly is avoided, full-process automation is achieved, the recovery efficiency is high, refined disassembly and recovery are achieved, an aluminum shell, a positive plate, a negative plate and a diaphragm are separated, the recovery rate and purity of valuable metal are improved, the production line process is short, and the production line cost is low. And no secondary pollution is generated.

The invention discloses a method for preparing a manganese iron phosphate precursor by recycling waste lithium manganese iron phosphate, and belongs to the technical field of lithium ion batteries. The invention provides a method for preparing a manganese iron phosphate precursor by recycling waste lithium manganese iron phosphate, which comprises the following steps: by taking waste lithium manganese iron phosphate battery powder as a raw material, carrying out acid dissolution and filtration to remove graphite and part of impurities; adjusting the pH value of the filtrate to obtain a lithium-ion-rich solution and a ferromanganese precipitate, and adding sodium carbonate into the lithium-ion-rich solution for concentration and crystallization to obtain battery-grade lithium carbonate; carrying out acid dissolution on the ferromanganese precipitate, removing copper and aluminum impurities in the solution, adjusting the ratio of ferromanganese to phosphorus, and mixing with liquid caustic soda in a nitrogen atmosphere to obtain a ferromanganese phosphate precursor; according to the method, the problems of incomplete recovery and insufficient impurity removal of the manganese iron phosphate lithium battery are solved, the battery-grade lithium carbonate and the manganese iron phosphate precursor are prepared during recovery, the value of the recovered product is improved, and the production requirement of the lithium ion battery is met.

The present disclosure relates to a recycled positive electrode active material, a method of producing the recycled positive electrode active material, and a secondary battery including the same. The recycled positive electrode active material, including: 60 mol % or more of Ni; and crystalline LiF, or 0.24% by weight or less of residual Li2CO3, where the recycled positive electrode active material is one or more selected from the group consisting of a lithium nickel oxide (LNO)-based positive electrode active material, a nickel·cobalt·manganese (NCM)-based positive electrode active material, a nickel·cobalt·aluminum (NCA)-based positive electrode active material, and a nickel·cobalt·manganese·aluminum (NCMA)-based positive electrode active material.

A waste lithium iron phosphate battery recovery method. The method comprises selective leaching, deep purification and battery-grade iron phosphate preparation. By means of selective leaching, lithium and ferrophosphorus materials are separated in one step, and leaching conditions are optimized to prevent difficulty in leaching ferrophosphorus and inability to dissolve impurities caused by transformation of a ferrophosphorus crystal form; obtained ferrophosphorus graphite slag is used as a raw material for synthesizing iron phosphate, and is subjected to further purification and impurity removal (deep purification) by means of a dilute strong acid and an alkali solution, thereby reducing subsequent complex processes such as liquid phase impurity removal of ferrophosphorus liquid, and finally, the purified ferrophosphorus graphite slag is subjected to acid leaching to obtain high-purity filtrate containing phosphorus and iron which can be used for directly synthesizing battery-grade iron phosphate. In the whole process, a small amount of acid is used, a high-impurity-content battery material can be treated, the impurity element removal efficiency is high, the process is short, and the economic benefit is high.

The invention relates to a method for processing rechargeable batteries. The object of the invention described here is to provide a method for processing rechargeable batteries, via which rapid, resource-conserving, cost-effective, and sustainable reprocessing of a rechargeable battery is made possible. This is achieved by the method according to the invention in that the rechargeable battery is discharged, the discharged rechargeable battery is opened, the opened rechargeable battery is broken down into its single cells, and the condition of the single cells is checked.

The invention discloses a method for recovering lithium, nickel cobalt manganese composite hydroxide and aluminum copper powder from a waste ternary lithium ion battery pole piece. The method comprises the following steps: treating waste pole pieces of a ternary plant or a mixture of positive and negative pole pieces by using a Fenton technology, leaching by using a mixed ferric salt solution, and filtering to obtain lithium-containing leachate and slag; adjusting the pH value of the leachate, oxidizing and filtering to obtain a purified solution and ferric hydroxide precipitate, and adding the purified solution and a lithium hydroxide solution into a reactor for coprecipitation to obtain a deeply purified solution and the nickel-cobalt-manganese composite hydroxide. And dissolving the ferric hydroxide precipitate with dilute acid, adding a reducing agent to generate a ferrous salt solution, and returning the ferrous salt solution for Fenton reaction and leaching reaction. And adding the sodium carbonate saturated solution into the deep purification solution, and crystallizing and precipitating to obtain the battery-grade lithium carbonate. And performing hydrodynamic screening on the leaching residues to obtain an aluminum-copper mixture and graphite residues, and performing grinding and specific gravity separation on the aluminum-copper mixture to obtain high-purity aluminum powder and copper powder. According to the method, the iron salt is directly leached from the pole piece, the used iron salt can be recycled, and the method is suitable for large-scale recovery of the waste ternary lithium ion battery.

The invention discloses a method for recovering lithium phosphate from lithium iron phosphate black powder. The method comprises the following steps: mixing black powder recovered from waste lithium iron phosphate batteries with sodium persulfate, and calcining; adding water into the obtained calcined product, dissolving, filtering to obtain water extract A and leaching residues, washing the leaching residues with water, and calcining at high temperature to obtain battery-grade iron phosphate; adding a sodium hydroxide solution into the water extract A, and reacting to obtain a water extract B; adding a trisodium phosphate solution into the water immersion liquid B, fully reacting, performing suction filtration to obtain lithium phosphate and filtrate, and cleaning and drying the lithium phosphate to obtain battery-grade lithium phosphate; and freezing and denitrifying the filtrate to obtain a denitrified solution, and adding the denitrified solution into the sodium hydroxide solution for recycling. The method does not generate wastes, recycles the filtrate in the whole process, theoretically realizes zero loss of the lithium element, prevents the iron element from entering the solution, simplifies the preparation steps of the lithium phosphate, and has the advantages of cost reduction and environmental protection.

The invention relates to the technical field of lithium iron phosphate batteries, and particularly discloses purification equipment and a purification process for recycling lithium carbonate from lithium iron phosphate batteries, the purification equipment comprises a crushing box and a grinding box, the grinding box is arranged below the crushing box, two crushing rollers are mounted in the crushing box, and a fixing frame is mounted on the outer wall of the crushing box; a filter box is arranged in the fixing frame, the top of the fixing frame is connected with a first moving frame through a telescopic mechanism, a second moving frame is installed in the first moving frame, two placing frames are placed above the second moving frame, and a processing mechanism is arranged at the top of the crushing box. According to the waste battery crushing equipment, through the arranged processing mechanism, the batteries can be extruded in advance before being crushed, so that the subsequent crushing process is easier to carry out, the energy consumption of the crushing equipment can be reduced, the crushing efficiency can be improved, the treatment time of the waste batteries can be shortened, and the generation of dust can be reduced; and positive significance is brought to preparation and purification of lithium carbonate.

The invention discloses lithium battery recycling material powder as well as a preparation method and application thereof, and relates to the technical field of battery recycling. The lithium battery recovery material powder comprises metal compound powder and an elemental carbon material, and the metal compound powder comprises at least one of the following elements: lithium, nickel, cobalt, manganese and iron; the separation index S of the lithium battery recovery material powder is greater than or equal to 0.15 m < 2 > / kg and less than or equal to 43 m < 2 > / kg, S = WDOC * BET, WDOC refers to the mass percent of soluble organic carbon in the lithium battery recovery material powder, and the soluble organic carbon refers to organic carbon which can be dissolved or dispersed in an aqueous solution with the pH value of 1-14; bET refers to the specific surface area of the lithium battery recovery material powder. The separation efficiency is high when the positive electrode material and the negative electrode material in the lithium battery recycled material powder are separated, and when the lithium battery recycled material powder is subjected to hydrometallurgy to extract valuable metal, the good metal leaching rate is achieved in the acid leaching stage.

The invention discloses a method for extracting valuable metals from black powder of waste lithium ion batteries, and belongs to the technical field of recycling of waste lithium ion batteries. According to the method, valuable metals are extracted from the waste lithium ion battery black powder by adopting low-temperature roasting and water leaching, the waste lithium ion battery black powder is taken as a raw material, sulfamic acid is taken as a roasting agent, the waste lithium ion battery is pretreated, and roasting for carbon removal, metal extraction and water leaching are performed in sequence, so that the valuable metals are obtained. And leaching liquid and leaching residues containing two or more elements of lithium, nickel, cobalt, manganese, iron and aluminum are obtained and are used for further purification and recovery of valuable metals. According to the method provided by the invention, the influence of aluminum dissolution on recovery of other metals is reduced, the use of hydrogen peroxide is avoided, the process flow is shortened, the process cost is greatly reduced, the roasting and water leaching processes cannot corrode equipment, and the whole process cannot generate waste acid to cause secondary pollution.

The invention discloses a method for recycling a lithium cobalt oxide positive electrode material in a waste lithium battery through a cascade pyrolysis method, and relates to the technical field of battery positive electrode recycling. The waste lithium battery is subjected to real-time adjustment according to a first-stage temperature adjustment formula within a first-stage pyrolysis temperature range to obtain a first-stage product; calculating a second-stage formula temperature of the first-stage product in a second-stage pyrolysis temperature range according to a second-stage temperature formula, constructing a second-stage temperature control model, and predicting a second-stage real-time prediction temperature; a second-stage product is obtained according to the second-stage formula temperature and the second-stage real-time predicted temperature, a third-stage formula temperature of the second-stage product is calculated according to a third-stage temperature formula in a third-stage pyrolysis temperature range, a third-stage temperature control model is constructed, a third-stage real-time predicted temperature is predicted, and a lithium cobalt oxide product is obtained according to the third-stage formula temperature and the third-stage real-time predicted temperature. The purity and the electrochemical performance of the lithium cobalt oxide positive electrode material are improved, and meanwhile, the energy consumption is reduced.

The invention relates to the technical field of battery recycling, and discloses waste ternary lithium battery recycling equipment which comprises a crusher, a crushing roller and a crushing plate, a guide hopper is installed in the crusher, a conveying belt is arranged below the guide hopper, a crushing assembly is arranged on the outer side of the crushing roller, and an air hole used for spraying nitrogen is formed in the side portion of the crushing assembly. A gas conveying assembly is arranged in the crushing roller and communicates with the gas holes. In an oxygen-deficient environment, the crushing assembly extrudes and crushes the lithium battery, and when the lithium battery is crushed, the air holes spray nitrogen to the lithium battery, so that an oxygen-free environment is instantly formed near the lithium battery, and the risk of explosion generated when the lithium battery is crushed is effectively reduced; and the crushing head is driven by the sliding block to move outwards by the same distance for compensation, so that the distance between the end part of the crushing head and the crushing plate is not changed, and a good crushing effect is ensured.

The invention relates to the technical field of lithium batteries, in particular to a preparation method of a regenerated high-nickel ternary material, and the preparation method comprises the following steps: classifying, discharging, disassembling and sorting a waste ternary lithium battery to obtain a ternary waste material; the ternary waste is subjected to pyrolysis treatment, ultrasonic treatment, sieving, smashing and sieving, and ternary waste fine powder is obtained; performing element determination on the ternary waste fine powder, then adding a nickel source, a cobalt source, a manganese source and a lithium source, adjusting the molar ratio of metal elements, and fully stirring and mixing to obtain a mixture; and sintering the mixture twice, crushing, screening and demagnetizing to obtain the regenerated high-nickel ternary material. The preparation method is simple to operate, acid-base leaching and extraction recovery are not involved in the whole process, harmful substances are not generated, and secondary pollution to the environment is avoided.

The invention discloses a waste lithium battery electrolyte waste gas treatment device and method, and relates to the field of waste lithium battery electrolyte waste gas treatment. The waste lithium battery electrolyte waste gas treatment device comprises a box frame, a filter box is fixedly connected to the box frame, a dust falling hopper is arranged on the filter box, a gas inlet pipe is fixedly connected to the dust falling hopper, a gas purification box is fixedly connected to the filter box, a gas outlet pipe is fixedly connected to the gas purification box, and dust removal cloth bags which are evenly distributed are fixedly connected to the bottom wall of the gas purification box. The upper end of the dust collecting bag is fixed and suspended in the inner cavity of the filter box. The problem that dust at the bottom of the bag is difficult to clean is solved through the dust cleaning mechanism, and the efficiency and service life of the dust collecting bag are improved; during dust removal, the plugging frame opens the bag bottom, accumulated dust is removed in cooperation with high-pressure injection, and sticky dust is prevented from forming a'dead zone '; the cloth bag is loosened to enhance the vibration effect and improve the dust stripping rate; the process is automatic, resistance is reduced, the operation period is prolonged, and complex waste gas purification is facilitated.

The invention relates to the technical field of lithium battery cell disassembly and recovery, in particular to a lithium battery cell disassembly and recovery device. Comprising a bottom plate, a transparent shell is arranged at the top of the bottom plate, a baffle is arranged on the transparent shell in a sliding mode, and a feeding mechanism is arranged on the bottom plate and used for feeding waste lithium batteries into the transparent shell. The transparent shell is filled with nitrogen through the gas transmission mechanism, then the waste lithium battery is fed into the transparent shell through the feeding mechanism, the waste lithium battery can be automatically disassembled through cooperation of the clamping type conveyor, the ceramic saw blade, the push block, the detection mechanism and the absorption mechanism, electrolyte is automatically collected, time and labor are saved, and the working efficiency is improved. The method is simple in process and high in efficiency, electrolyte in the waste lithium battery can be prevented from volatilizing and combusting by disassembling the waste lithium battery in the nitrogen environment, the safety of the disassembling process is improved, and meanwhile, chemical reaction can be inhibited and generation of harmful gas can be reduced by utilizing the inert characteristic of nitrogen.

The invention provides a precipitation method of a heavy metal solution. Cations in the heavy metal solution comprise nickel ions, cobalt ions, copper ions, zinc ions and manganese ions, and the precipitation method comprises the following steps: step S100, carrying out a manganese conversion reaction on an alkaline substance by adopting a solution containing manganese ions to obtain a converted manganese precipitate; s200, a stabilizing agent is adopted for carrying out a stabilizing reaction on the converted manganese precipitate, and a stable manganese precipitate is obtained; step S300, adding the stable manganese precipitate into a heavy metal solution for precipitation reaction to obtain precipitate slurry; step S400, continuously carrying out solid-liquid separation on the precipitate slurry to obtain a heavy metal precipitate and a manganese-containing solution; and S500, raw materials including the manganese-containing solution, an oxidizing agent and alkali liquor are subjected to an oxidation precipitation reaction, and a post-precipitation solution and a manganese product are obtained. The method solves the problems of poor sedimentation and filtration performance of a precipitation product, high moisture content of the precipitation product and low precipitation efficiency when heavy metals are precipitated in the heavy metal solution.

The invention discloses a method for directly repairing and regenerating a ternary positive electrode recycled material. The method comprises the following steps: S1, disassembling a ternary retired battery; s2, sintering to remove impurities; s3, removing powder and sieving; s4, mixing with crystalline lithium salt; s5, crushing and sieving after sintering and cooling; s6, mixing with a metal oxide; and S7, sintering, cooling, removing iron, and sieving. The eutectic lithium salt is used as a lithium source for lithium supplement, so that the diffusion rate of lithium ions can be increased, the concentration of the lithium ions can be improved, the reaction temperature of lithium supplement recovery can be reduced, and the energy consumption can be reduced. The ternary lithium battery is wrapped by the metal oxide, residual lithium on the surface of the material can be utilized, a layer of fast ion conductor can be formed on the surface of the material in situ, and the residual lithium on the washed surface is removed, so that the process is shortened, the cost is reduced, the transmission rate of lithium ions can be further improved, and the rate capability of the battery is improved. And the fast ion conductor structure can isolate the contact between the electrolyte and the positive electrode material, so that side reaction is reduced, and the cycle performance is improved.