1135 results about "Battery recycling" patented technology

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.

This invention discloses a method for leaching lithium iron phosphate mixed powder with iron salts and recovering all components, belonging to the field of battery recycling. The invention uses an iron salt solution to leach the mixed powder, obtaining a lithium-containing leachate and leaching residue. Ferrous ions in the leachate are regenerated into ferric iron through acidification and oxidation, and recycled for leaching the next batch of mixed powder. After reaching a preset number of cycles, the leachate is used for re-leaching multiple batches of leaching residue to improve the lithium leaching rate. Ultimately, a enriched solution containing Li, Fe, Cu, and Al and graphite-containing iron phosphate residue are obtained. Copper is recovered from the enriched solution through iron powder replacement, and a high-purity lithium chloride solution is obtained through extraction and separation, while ferric chloride (recycled) and aluminum chloride crystals are also recovered. The leaching residue is treated with hydrochloric acid to obtain regenerated graphite, and the pH is adjusted with alkali to obtain high-purity iron phosphate. This method achieves full component recovery under mild conditions, reducing separation steps and chemical consumption through a "leaching-regeneration-leaching" cycle mechanism, thus achieving both environmental and economic benefits.

The present invention relates to the technical field of battery recycling equipment, and in particular to a discharge device for recycling waste lithium batteries. The hoisting assembly includes winches arranged at intervals on a mounting frame, the ropes of the winches slide through the mounting frame, and the ends of the ropes of the winches are respectively connected to immersion frames, and the immersion frames are loaded with placement frames for placing batteries. Through the coordinated operation of the hoisting assembly, the loading and unloading assembly and the deployment assembly, differentiated discharge treatment of waste lithium batteries is achieved; by using the winch and the multi-stage telescopic cylinder in conjunction with the independent immersion frame and placement frame structure, targeted discharge can be performed on batteries with different remaining power conditions; at the same time, the loading and unloading assembly supports the independent transportation of batteries before and after discharge, providing guarantees for continuous and batch operations, and the deployment assembly can adjust the brine ratio in real time to ensure a consistent electrolyte environment during the discharge process, thereby improving the stability of the discharge effect and the resource recovery rate.

The invention relates to the technical field of lithium ion power battery recycling, and discloses a lithium ion power battery echelon utilization auxiliary analysis method and system, and the method comprises the steps: obtaining the operation parameter data of a decommissioned battery pack, analyzing the characteristics of a single battery, and confirming an echelon utilization mode (capacity recombination or internal resistance equalization); performing initial capacity and internal resistance grouping based on the mode, and generating adjustment data through capacity attenuation trajectory matching and internal resistance drift trend analysis; performing electrochemical state degradation prediction on the internal resistance adjustment data, and constructing an echelon utilization comprehensive strategy in combination with the adjustment data; and collecting strategy execution feedback data, evaluating a performance matching degree and iteratively optimizing the strategy. The system comprises a mode identification module, a capacity recombination module, an internal resistance balancing module, a strategy optimization module and a feedback execution module. According to the method, through multi-dimensional feature analysis, dynamic grouping, accurate prediction and closed-loop optimization, the efficiency and safety of echelon utilization of the retired batteries are improved, and the method is suitable for a recycling scene of the lithium ion power batteries.

The invention provides a battery replacement control method and a battery replacement system for electric mechanical equipment, and the method comprises the steps: controlling a battery replacement mechanical arm to lift a battery pack to be replaced from a battery cabin to a preset position I after the connection of the battery replacement mechanical arm and the battery pack is completed; the battery replacement mechanical arm is controlled to move the battery pack needing to be replaced from the first preset position to a battery recycling area of the battery replacement platform, and meanwhile instruction actions for controlling the battery replacement mechanical arm are recorded; the battery transposition platform is controlled to exchange positions of the new battery pack to be replaced and the battery pack to be replaced, so that the new battery pack to be replaced is moved to the position of a battery recycling area; the battery replacing mechanical arm is controlled to reversely execute the recorded instruction action, and the new battery pack to be replaced is placed at the first preset position; the battery replacing mechanical arm is controlled to move the new battery pack to be replaced from the first preset position into the battery bin; according to the invention, automatic battery replacement of the electric engineering machinery can be realized, the battery replacement efficiency and the battery replacement accuracy are improved, safety accidents are avoided, and the environmental adaptability of the battery replacement equipment is improved.

The invention discloses a full-life-cycle intelligent management system and an echelon utilization method of a battery replacement type power battery. The full-life-cycle intelligent management system comprises a full-life-cycle intelligent digital management system, a power battery application system, a retired battery echelon utilization system and a waste battery recycling system, the full-life-cycle intelligent digital management system comprises a battery identification module, a data storage module, a data analysis module and a large database module. Through data acquisition and analysis of the full-life-cycle intelligent digital management system, power battery application, decommissioned battery disassembly and recombination, recombined battery echelon utilization and waste battery resource recycling are integrated, full-life-cycle management of the power battery is achieved, the tail end barrier of development of the new energy industry is solved, and the development efficiency of the new energy industry is improved. The high-value application of the power battery is improved, the environmental pressure of local solid wastes is solved, and the sustainable development of local waste production enterprises and industries is ensured.

The invention provides a waste gas treatment device for lithium battery recovery treatment, and belongs to the technical field of waste gas treatment. The mixing assembly comprises a supporting plate and an adsorption drawer, the two ends of the supporting plate are fixedly connected to the bottom inner wall and the top inner wall, close to the air inlet pipe, of the activated carbon adsorption box correspondingly, the adsorption drawer is installed in the adsorption cabinet, and a first rotating groove is formed in the bottom inner wall of the adsorption drawer; a first avoiding groove is formed in the outer wall of the side, away from the center shaft of the activated carbon adsorption box, of the adsorption drawer, and a pull ring is installed on the outer wall, close to the first avoiding groove, of the adsorption drawer. By arranging the mixing assembly, waste gas can be pushed to the adsorption cabinet, activated carbon particles can conveniently adsorb the waste gas, follow-up stirring is matched to promote the waste gas to diffuse outwards from the interiors of the particles, the adsorption efficiency of the activated carbon particles is improved, and the crushed activated carbon particles after saturation can be collected.

The invention belongs to the technical field of lithium ion battery recovery, and particularly relates to an impurity removal method of waste lithium iron phosphate and battery-grade ferric phosphate, waste lithium iron phosphate black powder is added into high-concentration acid for acid leaching, and leaching of iron, phosphorus and lithium elements is achieved; adding an impurity removal agent 1 into the obtained filtrate to remove impurity copper; then adding a composite impurity removing agent 2 to form an aluminum-containing complex precipitate, removing impurity aluminum, and meanwhile, removing impurity titanium due to hydrolysis in the process; and adding an oxidizing agent and a precipitating agent into the obtained purified liquid for synthesis. And supplementing phosphoric acid into the obtained amorphous iron phosphate, carrying out crystallization reaction at high temperature, and finally, carrying out flash evaporation and calcination to obtain the anhydrous battery-grade iron phosphate. The method is high in impurity removal efficiency, the regenerated iron phosphate can reach battery-grade iron phosphate, and the method is a feasible method for regenerating the battery-grade iron phosphate by using the waste lithium iron phosphate black powder.

The invention discloses a method for separating, purifying and regenerating waste battery negative electrode powder, which belongs to the field of battery recycling and regenerating, and mainly comprises the following process steps of: ball-milling and screening waste battery negative electrode pieces into certain granularity, soaking the waste battery negative electrode pieces in alkali liquor and an impurity removal agent, and stirring for reaction and separation to obtain a negative electrode powder wet material and a copper ion solution; carrying out drying demagnetization and infrared irradiation treatment on the wet negative electrode powder to obtain regenerated negative electrode powder; and the copper ion solution is subjected to extraction, back extraction and reduction to obtain crude copper, and the crude copper is subjected to vacuum distillation to obtain an electronic-grade copper product. Wherein the impurity removal agent comprises an oxidizing agent, the oxidizing agent oxidizes elemental copper and forms soluble substances under the action of alkali liquor, and the excellent separation effect is achieved. The negative electrode powder treatment comprises infrared irradiation treatment, decomposition of an adhesive can be achieved through the dual effects of heat irradiation and heat conduction, the volume heating effect is formed through scattering, surface crusting is effectively avoided, the adhesive can be efficiently removed, and the quality and the recycling efficiency of the regenerated negative electrode powder are guaranteed.

The invention discloses a regulation and control system and method of a pH meter in a waste lithium battery recovery process, and relates to the technical field of waste battery recovery treatment. The system comprises a central control module, a liquid caustic soda adjusting device and a liquid acid adjusting device, wherein a pH meter measures the pH value of a leaching solution of a leaching-stage reaction kettle in a waste lithium battery recycling process in real time; the central control module compares the pH value, measured in real time, of the leaching liquid in the leaching-stage reaction kettle with the pH value preset range of the leaching stage, acid liquid or alkali liquid is added into the leaching-stage reaction kettle according to the comparison result, and the pH value of the leaching liquid is adjusted to be within the pH value preset range of the leaching stage; the central control module can also identify interference factors measured by the pH meter and compensate the slope according to the current temperature so as to compensate the pH value, measured by the pH meter, of the leachate. According to the method, accurate control over the pH value in the leaching process can be effectively achieved, the recovery efficiency and quality of the waste lithium batteries are improved, and the production cost is reduced.

The invention relates to the technical field of new energy battery recycling, and discloses a new energy battery recycling device which comprises a disassembling table, supporting tables are fixed to the two sides of the disassembling table, multi-axis mechanical arms are fixed to the tops of the supporting tables, and a laser cutting head and a vacuum adsorber are fixed to the tail ends of the two multi-axis mechanical arms correspondingly. The new energy battery recycling device comprises a disassembling table, adjusting grooves are formed in the inner walls of the two sides of the disassembling table, first air cylinders are slidably connected to the interiors of the adjusting grooves, and second air cylinders are fixed to the bottoms of the first air cylinders. The first air cylinder drives the linkage frame and the ejector rod to move in the vertical direction of the new energy battery, in the moving process, the ejector rod is clamped into a cutting gap of the new energy battery, and then through continuous movement of the ejector rod, the effect of uncovering shells on the two sides of the soft package lithium battery is achieved; and the convenience of disassembling the shell of the soft package lithium battery by the vacuum adsorber is further improved.

The present invention relates to the technical field of lithium-ion battery recycling and utilization, and specifically discloses a method for recycling and regenerating positive electrode materials from waste ternary lithium-ion batteries. The present invention uses a ternary deep eutectic solvent combined with microwave-assisted leaching to efficiently leach waste lithium-ion battery positive electrode materials, and then combines subsequent precipitation and adjustment of the molar ratio of metal elements to regenerate the positive electrode materials. The obtained recycled and regenerated positive electrode materials have good electrochemical properties. The technical solution provided by the present invention effectively solves the problems of high cost and complicated process flow of the existing method for recycling metals from waste ternary lithium-ion batteries, and the problem that when the recovered metals are used to prepare lithium battery positive electrode materials, the purity is insufficient, resulting in poor effect of the regenerated positive electrode materials. It provides a new idea for the treatment of waste ternary lithium-ion batteries.

The invention belongs to the technical field of resource recycling of waste lithium batteries, and particularly relates to a method for extracting lithium by stripping and coupling organic matter degradation of waste lithium batteries, which comprises the following steps: S1, obtaining a waste lithium iron phosphate positive plate and an organic pollutant aqueous solution; s2, soaking the waste lithium iron phosphate positive plate in an organic acid solution, and stripping to obtain an aluminum foil and a lithium iron phosphate material; s3, adding the lithium iron phosphate material, a complexing agent and an oxidation auxiliary agent into the organic pollutant aqueous solution to obtain a first reaction system, and carrying out a first reaction; after the reaction of the second reaction system is balanced, carrying out solid-liquid separation to obtain filtrate and filter residues, adding a lithium salt precipitator into the filtrate, and filtering to obtain lithium salt and recovering the lithium salt; according to the method, the battery recovery process and the wastewater treatment process are ingeniously coupled, the components of the waste battery material are used as the catalyst, organic pollutants in the environment are degraded, and cooperative treatment of waste and upgrading and recovery of resources are achieved.

The utility model provides a waste battery recovery device. The waste battery recovery device comprises a pretreatment device, a melting device, a first impurity removal device, a non-lithium active metal element extraction device, a second impurity removal device and a second metal element extraction device. According to the waste battery recycling device, the recycling process can be simplified, the recycling yield is increased, the recycling cost is reduced, and the requirement for the device is low.

The invention belongs to the technical field of waste battery recovery and regeneration, and particularly relates to a method for recovering valuable metal from a waste lithium battery positive electrode material. The method comprises the following steps: carrying out sulfuration roasting on waste positive electrode powder, selectively extracting lithium in a water leaching manner, and precipitating lithium to obtain lithium carbonate; separating and purifying the nickel, the cobalt and the manganese through microwave acid leaching, precipitation impurity removal and step-by-step extraction to obtain extract liquor of the nickel, the cobalt and the manganese, and performing reverse extraction on the extract liquor to obtain battery-grade cobalt sulfate, battery-grade nickel sulfate and battery-grade manganese sulfate. According to the method, lithium is extracted firstly, the influence of the lithium element on subsequent nickel-cobalt-manganese extraction is reduced, meanwhile, the recovery rate of lithium is increased through the water leaching method, and the recovery cost is reduced. According to the method, precipitation and impurity removal are performed before nickel-cobalt-manganese extraction, so that the content of impurities in a sulfate solution is reduced, and the recovery rate of nickel, cobalt and manganese is greatly improved.

The invention provides a waste battery recovery method and device, the method uses a low-melting-point molten salt with reducibility as a reactant to strip Li, Co, Ni, Mn and other elements in a waste battery from an oxygen element, chlorine salt which is easier to carry out subsequent replacement reaction is generated, the Li, Co, Ni, Mn and other elements in the waste battery can be extracted step by step through the replacement reaction, and the recovery rate of the waste battery is improved. And the recovery process is simplified. The waste battery recycling method has the advantages of being low in cost, high in recycling yield, low in requirement for recycling equipment and the like.

The invention discloses a method for regenerating and preparing high-voltage lithium cobalt oxide by using an invalid lithium cobalt oxide material, and belongs to the technical field of battery recovery. The method comprises the following steps: S1, carrying out ball milling and mixing on failed lithium cobalt oxide powder and a sodium source, and then carrying out solid-phase sintering to obtain a P2 type sodium cobalt oxide and lithium cobalt oxide material; s2, the P2 type sodium cobaltate and lithium cobaltate material is placed in a lithium-containing solution for a hydrothermal reaction, a regenerated O2-O3 cotype lithium cobaltate material is obtained, the regenerated O2-O3 cotype lithium cobaltate material has the advantages of being good in cycling stability, high in rate capability, high in low-temperature performance and the like under the high voltage of 4.6 V, and the performance of the regenerated O2-O3 cotype lithium cobaltate material is superior to that of a commercial lithium cobaltate material.

The invention provides a battery health state estimation and recovery method of a domain knowledge-guided large language model, and mainly relates to the field of machine learning and battery health assessment. The method mainly comprises the following steps: collecting battery charging and discharging measurement data and relaxation voltage data, and pre-processing the data; using cross attention to jointly encode relaxation voltage and measurement data, and designing a sequence reprogramming embedding method to generate a sequence embedding matrix; constructing a large-model-oriented domain knowledge prompt text, and generating a degradation knowledge embedding matrix; the two types of matrixes are fused and embedded into a pre-training large model, a sparse perception adapter is established to optimize an output matrix, and adaptive estimation of the health of the target battery is achieved. According to the method, aiming at the problems of low accuracy, weak generalization and the like of health estimation of batteries with multiple working conditions and multiple materials, the health state estimation capability of a large model is improved by embedding domain knowledge, and a decision basis is provided for battery recycling.

The invention belongs to the field of waste battery recovery processing, and particularly relates to a waste battery pack deep intelligent discharging system, which comprises a control unit, which is electrically connected with a waste battery pack through a discharging loop and is used for discharging the waste battery pack; a fire extinguishing medium is accommodated in the fire extinguishing pool; the bearing mechanism is arranged at the feeding opening of the fire extinguishing pool and used for bearing the waste battery pack in the discharging process; the driving mechanism is connected with the bearing mechanism and used for driving the bearing mechanism to execute opening and closing actions; and the temperature monitoring unit is used for monitoring the temperature of the waste battery pack in real time. The deep intelligent discharging system for the waste battery pack can safely, intelligently and quickly discharge the waste battery pack, does not pollute the environment, and is relatively low in discharging cost, reasonable in structure, safe and reliable.

The invention provides a method for preferentially extracting lithium from a waste lithium-containing material, and relates to the field of battery recovery. Mixing the waste lithium-containing material with a lead-containing compound, and roasting to obtain roasted sand; carrying out water leaching on the roasted product, and carrying out solid-liquid separation to obtain lithium-rich water leaching liquid and water leaching residues; the water leaching residues are subjected to acid leaching and liquid-solid separation, and acid leaching residues and acid leaching liquid are obtained; the waste lithium-containing material comprises black powder and / or positive electrode powder; the lead-containing compound comprises lead sulfate and / or lead sulfide. A lead-containing compound is added into a waste lithium-containing material for roasting-water leaching, the leaching rate of lithium can be 99% or above, nickel / cobalt / manganese near-zero leaching can be achieved, the production cost of lithium extraction is reduced, and efficient extraction of lithium is achieved; the leaching rate of nickel / cobalt / manganese is 99% or above only by performing simple acid leaching on the water leaching residues, and lead is nearly zero leaching and exists in the acid leaching residues in the form of lead sulfate.

The invention discloses a method for separating and recycling phosphorus, iron and lithium in battery black powder, and relates to the technical field of battery recycling. The method comprises the following steps: carrying out acid leaching on battery black powder to obtain a battery black powder leaching solution and filter residues; an oxidizing agent is added into the battery black powder leaching solution, the pH of the solution is adjusted to 1.8-2.5, solid-liquid separation is conducted after the reaction is completed, and iron phosphate sediment and a lithium-containing solution are obtained; adjusting the pH value of the lithium-containing solution to 10-12, and carrying out solid-liquid separation after the reaction is completed to obtain a metal precipitate and a lithium sulfate solution; dissolving the iron phosphate precipitate in a sulfuric acid solution, adding a reducing agent to reduce ferric iron into ferrous iron, separating out ferrous sulfate by adopting an alcohol precipitation method or an ammonium sulfate crystallization method, and performing solid-liquid separation after the reaction is completed to obtain ferrous sulfate precipitate or ammonium ferrous sulfate crystals and mother liquor; and evaporating and concentrating the mother liquor, and extracting to obtain a phosphoric acid solution. According to the method, the three elements of phosphorus, iron and lithium in the battery black powder can be recycled, and the environmental problem caused by stacking of the lithium extraction slag can be avoided.

The invention discloses a method for recycling lithium from a lithium battery. The method comprises the following steps: obtaining a recycled lithium battery powder mixture and a carbon source; mixing the recycled lithium battery powder mixture with a carbon source through a mixing machine; a mixed lithium battery powder mixture and a carbon source are ground through ball milling equipment, lithium battery recycling can be widely applied to recycling of a lithium battery material through the carbon adding and calcining technology, and important application value is achieved. The method has the advantages of simple process, low cost and the like, along with rapid development of the new energy industry, the technology has a wide market prospect, the primary recovery rate of recovery is higher than that of a direct chemical precipitation method, and the method is simple in process flow, combines physical and chemical methods, is easy for industrial production, and is suitable for industrial production. The carbon source cost is low, the addition amount is small, toxic and harmful substances are not introduced in the method, and the method is environment-friendly.

The invention relates to the technical field of battery recovery equipment, in particular to a discharging device for waste lithium battery recovery. The hoisting assembly comprises winches arranged on the mounting frame at intervals, ropes of the winches penetrate through the mounting frame in a sliding mode, the ends of the ropes of the winches are connected with immersion frames respectively, and placing frames used for placing batteries are loaded in the immersion frames. Differentiated discharge treatment of the waste lithium batteries is realized through cooperative operation of the hoisting assembly, the loading and unloading assembly and the allocation assembly; a winch and a multi-stage telescopic cylinder are matched with an independent immersion frame and placement frame structure, so that batteries with different residual electric quantities can be discharged in a targeted manner; meanwhile, the loading and unloading assembly supports independent conveying of the battery before and after discharging, guarantee is provided for continuous and batch operation, the blending assembly can adjust the proportion of salt water in real time, it is ensured that the battery is in a consistent electrolyte environment in the discharging process, and therefore the stability of the discharging effect and the resource recycling rate are improved.

The invention discloses a method for separating and recycling phosphorus, iron and lithium in battery black powder, and relates to the technical field of battery recycling. The method comprises the following steps: mixing and leaching battery black powder and sulfuric acid, and filtering to obtain a leaching solution; the pH of the leachate is controlled, ferrous sulfate in the solution is separated out through alcohol substances or ammonium sulfate, and ferrous sulfate precipitates or ammonium ferrous sulfate crystals and mother liquor are obtained after filtration; evaporating and concentrating the mother liquor, adding an impurity removing agent into the mother liquor, and extracting to obtain a phosphoric acid solution and a lithium-containing solution; after phosphoric acid is supplemented into the lithium-containing solution, the pH is adjusted to be 8-10, and battery-grade lithium phosphate precipitates are obtained. According to the method, iron in the leachate is separated out firstly, and the subsequent impurity removal difficulty is greatly reduced, so that recycling of three elements including phosphorus, iron and lithium in the battery black powder is facilitated, and the environmental problem caused by stacking of lithium extraction residues can be avoided.

The invention discloses recycling equipment for waste batteries of new energy vehicles, and belongs to the technical field of waste battery recycling, the recycling equipment comprises a transmission unit, a plurality of limiting assemblies are arranged in the transmission unit, and dynamic adjusting assemblies are arranged in the limiting assemblies. According to the cutting device, a limiting base drives a sliding block to move, the sliding block can move downwards under the action of a guide rod and a stroke groove, an external driving unit drives a connecting base and the sliding block to move downwards, liquid in a main liquid bag is conveyed into an auxiliary liquid bag, and the auxiliary liquid bag expands and drives a rectangular sliding block, a connecting rod and a cutting unit to move; according to the equipment, the use position of the cutting unit is adjusted, the adaptability of the top cutting unit and the waste battery shell can be automatically adjusted according to the adaptability of the bottom limiting assembly to the waste battery shell, and therefore the cutting unit can cut the waste battery shells of different shapes or different sizes; and the consistency of notches among multiple surfaces of the waste battery shell is improved.

The invention provides a waste lithium iron phosphate battery recovery process, and relates to the technical field of battery recovery, the waste lithium iron phosphate battery recovery process comprises the following steps: pre-treating waste lithium iron phosphate batteries to obtain battery powder; mixing the battery powder with a lithium source, and carrying out aerobic roasting and water leaching at 400-600 DEG C to obtain a first lithium-containing solution and modified battery powder; 90-120 g / t of sodium hexametaphosphate, 400-1000 g / t of sulfuric acid, 400-600 g / t of kerosene and 100-200 g / t of 2 # oil are added into the modified battery powder for flotation, and a graphite product and lithium iron phosphate battery powder are obtained. The process can effectively improve the recovery rate and recovery purity of graphite and lithium iron phosphate materials in the battery powder, and is suitable for large-scale industrial recovery treatment.

The invention relates to the technical field of battery recovery, in particular to a method for separating and recovering metal elements in waste ternary lithium ion battery leachate, which comprises the following steps: A) mixing an extracting agent 2-n-hexyldecanoic acid with a diluent to obtain an extracting solvent; b) mixing the extracting solvent with a saponifying agent to obtain a saponified extracting solvent; c1) mixing the waste ternary lithium ion battery leachate with the saponified extraction solvent, and carrying out single-stage extraction to obtain a raffinate water phase and a loaded organic phase; and D1) mixing the loaded organic phase with a back extraction agent, and carrying out back extraction to obtain a back extraction solution and a blank organic phase. According to the invention, the problems of complex recovery process and difficult separation of calcium and magnesium in the nickel-cobalt-manganese co-extraction process in the prior art are solved, and the recovery of nickel, cobalt and manganese can be realized through one-step selective co-extraction process; the technological process is short and the metal recovery rate is high.

The invention discloses a method for circularly leaching lithium iron phosphate mixed powder from ferric salt and recovering all components, and belongs to the field of battery recovery. The method comprises the following steps: leaching mixed powder by adopting an iron salt solution to obtain a lithium-containing leaching solution and leaching residues; ferrous ions in the leachate are regenerated into ferric iron through acidification and oxidation, the ferric iron is cyclically used for leaching the next batch of mixed powder, after the preset cycle number is reached, the leachate is used for re-leaching treatment of multiple batches of leaching residues, and the lithium leaching rate is increased. And finally obtaining enriched liquid containing Li, Fe, Cu and Al and iron phosphate slag containing graphite. And replacing the enriched liquid with iron powder to recover copper, extracting and separating to obtain a high-purity lithium chloride solution, and simultaneously recovering ferric chloride (recycling) and aluminum chloride crystals. And treating the leaching residues with hydrochloric acid to obtain regenerated graphite, and adjusting the pH value with alkali to obtain high-purity iron phosphate. According to the method, all-component recovery is achieved under the mild condition, separation steps are reduced through a leaching-regeneration-leaching circulation mechanism, chemical consumption is reduced, and the method has both environmental and economic benefits.

The invention relates to the technical field of battery recovery, and particularly discloses a recovery method of waste lithium iron phosphate and a lithium ion secondary battery. The recovery method of the waste lithium iron phosphate comprises the following steps: leaching acid liquor, and carrying out solid-liquid separation to obtain acid leaching liquor and a regenerated negative electrode material; cooling and crystallizing, and carrying out solid-liquid separation to obtain first iron-removed slag and first iron-removed liquid; oxidizing, adjusting pH, removing iron, and carrying out solid-liquid separation to obtain second iron-removed slag and second iron-removed liquid; adjusting the pH to precipitate lithium phosphate, and carrying out solid-liquid separation to obtain first lithium phosphate slag and lithium precipitation mother liquor; adding a lithium source into the lithium precipitation mother solution, and carrying out solid-liquid separation after reaction to obtain second lithium phosphate slag and a phosphorus removal solution; and evaporating and concentrating the dephosphorized solution to obtain a by-product salt. By implementing the invention, the recovery of each useful component can be realized.

The utility model discloses a power battery recycling system which comprises a vehicle body, and a material elevator, a crusher, a hydraulic filter and a filter press are respectively arranged on the vehicle body. A water inlet pipe and a water inlet pump are respectively arranged at a feeding hole of the crusher; the water inlet pipe is communicated with an external water source. A discharge port of the material elevator is communicated with a feed port of the crusher, and an overflow pipe is arranged at the top of the crusher. The utility model relates to the technical field of power battery recovery, in particular to a power battery recovery processing system which is improved by taking an existing boxcar as a carrier, related battery processing equipment is reasonably arranged in the boxcar, and recovered batteries can be subjected to crushing and filter pressing through the vehicle-mounted recovery equipment, so that the recovery efficiency of the power batteries is improved. Meanwhile, harmful dust gas and the like generated in the process are subjected to innocent treatment, pollution to the environment is avoided, and the crushed battery materials treated by the equipment release electric charges, so that the phenomenon of short circuit or explosion is unlikely to occur in the subsequent transportation process.