CN111822140A - Recovery method of waste soft package lithium battery - Google Patents
Recovery method of waste soft package lithium battery Download PDFInfo
- Publication number
- CN111822140A CN111822140A CN202010547593.9A CN202010547593A CN111822140A CN 111822140 A CN111822140 A CN 111822140A CN 202010547593 A CN202010547593 A CN 202010547593A CN 111822140 A CN111822140 A CN 111822140A
- Authority
- CN
- China
- Prior art keywords
- particles
- package lithium
- soft package
- waste soft
- lithium battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
- B03B2009/066—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Abstract
The invention discloses a method for recovering waste soft package lithium batteries, which comprises the following steps: connecting the waste soft package lithium batteries into a load resistor in a series, parallel or series-parallel mode to discharge, and collecting electrolyte by splitting an aluminum-plastic film; separating in advance by using a lighter diaphragm after crushing; further utilizing the relatively low density of the aluminum plastic film, adopting jigging separation and matching with wet screening; and finally, drying and crushing the residual substances, and then realizing effective separation of all valuable substances by screening and grading and specific gravity sorting. By adopting the recovery method, all valuable substances of the waste soft package lithium battery can be recovered, and the recovery rate and the purity are higher.
Description
Technical Field
The invention belongs to the technical field of recycling of lithium ion batteries, and particularly relates to a recycling method of waste soft package lithium batteries.
Background
Under the promotion of the global energy technology revolution, the new energy automobile is taken as a strategic emerging industry of the key development of China, and the output and sale quantity of the new energy automobile is stabilized in the first world. The lithium ion battery has the characteristics of long service life, high safety, no memory effect and the like, and is widely applied to a main stream new energy automobile matched battery system.
Lithium ion batteries are mainly classified into three main categories: cylindrical, square and soft package, wherein the soft package lithium battery adopting the aluminum plastic film shell has more excellent performance compared with the square and cylindrical lithium batteries adopting hard shells of aluminum alloy, stainless steel and the like, and the main body limit is good safety performance, light weight, large battery capacity, good cycle performance, small internal resistance, flexible design and the like.
Mainstream battery manufacturers at home and abroad start to gradually increase the design and development strength of soft package batteries, and are matched with a whole vehicle factory to gradually develop related applications on middle-high-end vehicle types, so that the problem of recycling the soft package lithium batteries can be expected after 3-5 years. However, at present, a large amount of work is done on the recovery of square and cylindrical lithium batteries by lithium battery recovery enterprises, and an effective matching method and process are lacked for the recovery of the soft package lithium battery with an aluminum plastic film shell.
The Chinese patent application with the application number of 201510048845.2 discloses a method and a device for recovering an aluminum-plastic composite film material of a flexible package lithium ion battery, wherein the method comprises the steps of chopping an aluminum-plastic composite film, collecting residual electrolyte in the aluminum-plastic composite film, putting the residual electrolyte and the aluminum-plastic composite film into an acid solution with a certain concentration, and stirring for 10-120min at the temperature of 60-100 ℃ to realize the separation of aluminum and plastic in the aluminum-plastic composite film. The technical scheme mainly solves the problem of separating and extracting aluminum and plastic in the aluminum-plastic composite film material, and does not relate to the separation of positive and negative electrode powder, a diaphragm, copper foil and aluminum foil in the soft package battery.
The Chinese patent application with the application number of 201810175050.1 discloses a method for recycling and reusing all components of a waste new energy automobile lithium ion power battery, which comprises the steps of carrying out heat treatment on a battery subjected to discharge treatment by adopting high-temperature pressurized steam, then carrying out shelling and crushing, separating iron substances by using a weak magnetic separator, and simultaneously removing light substances by using negative pressure air flow; separating the rest materials by eddy current to obtain non-conductive components; separating the fragments of the positive plate and the negative plate by a strong magnetic separator; then the electrode material is stripped through the treatment of a double-roller machine and a dry friction machine and is collected through cyclone separation and a pulse dust collector; dissolving lithium ions out of the collected positive electrode material powder; precipitating the lithium ion filtrate, removing impurities, filtering and recovering lithium carbonate. The technical scheme mainly aims at square lithium batteries and soft package battery modules, and attempts to adopt an integrated processing mode to be compatible with various types of lithium batteries, but the technical scheme is more suitable for square batteries, the destination of a soft package aluminum-plastic film is not explained, and the problems of difficulty in separating valuable objects, complex steps and the like still exist after the square batteries and the soft package aluminum-plastic film are processed by the scheme.
Disclosure of Invention
In view of the above, the present invention needs to provide a method for recycling waste soft package lithium batteries, in which the waste soft package lithium batteries are connected in series, in parallel, or in series-parallel, and are discharged through a load resistor, so that the requirements of discharge equipment are simplified, and the discharge efficiency is greatly improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for recovering waste soft package lithium batteries, which comprises the following steps:
connecting waste soft package lithium batteries to be recovered in series, parallel or series-parallel connection, and connecting a load resistor and keeping a path to discharge;
cutting and splitting the discharged waste soft package lithium battery into aluminum plastic films, standing, and fully flowing out and collecting electrolyte;
shredding the split waste soft package lithium battery, further crushing to obtain particles, and winnowing to separate a diaphragm;
separating the air-separated particles by jigging through the movement of a blast water flow to obtain particles with higher density and particles with lower density, wherein the particles with higher density are positive and negative electrode fluids, and the particles with lower density are an aluminum plastic film, negative electrode powder and positive electrode powder;
wet sieving the particles with smaller density to obtain an oversize product aluminum plastic film and an undersize product 1#Positive and negative electrode powders;
drying the particles with larger density and then crushing the dried particles to obtain fine particles;
classifying the fine particles by screening to obtain 2#Positive and negative electrode powders;
and separating the fine particles after screening and grading into copper particles and aluminum particles by sorting according to the specific gravity difference of the copper particles and the aluminum particles.
Further, the cut-off voltage of the discharge is controlled to be 0.5-1.5V, the temperature of the waste soft package lithium battery is controlled not to exceed T +20 ℃ in the discharge process, T is the ambient temperature, and the temperature of the load resistor is controlled not to exceed 150 ℃.
Further, the step of cutting and splitting the discharged waste soft package lithium battery specifically comprises: and splitting the discharged waste soft package lithium battery along the wide surface by adopting a cutting mode, wherein the cutting mode comprises mechanical cutting, laser cutting or plasma cutting.
Further, the step of shredding the split waste soft package lithium battery and then further crushing the crushed waste soft package lithium battery to obtain particles specifically comprises the following steps: and shredding the split waste soft package lithium battery until the granularity is less than or equal to 30-40mm, and further crushing until the granularity is less than or equal to 10-20 mm.
Furthermore, in the jigging separation process, the feeding needs to be uniform, and the feeding speed is controlled to be 1-2 t/h.
Further, the screen adopted by the wet screening is a 0.25mm screen.
Further, the step of drying and then crushing the particles with higher density to obtain fine particles specifically comprises the following steps: drying the particles with larger density at the temperature of 200-500 ℃, crushing the particles until the particle size is less than or equal to 2-5mm, and purifying waste gas generated in the drying process to reach the standard and discharging.
Further, the screen of the screening and grading is selected to be 0.125-0.25 mm.
According to the invention, the waste soft package lithium batteries are recycled as a research object, and are connected in series, in parallel or in series-parallel, and then are connected with the load resistor for discharging, so that the requirements of discharging equipment can be simplified, and the discharging efficiency is greatly improved; the electrolyte is collected by splitting the aluminum plastic film, so that the problem of recycling most of the electrolyte can be effectively solved; the diaphragm is light after being crushed, and air separation is carried out in advance, so that the condition that the positive and negative electrode powders are coated by contraction and agglomeration of the diaphragm due to high drying temperature can be avoided, and the loss of the positive and negative electrode powders can be greatly reduced; further, the relatively low density of the aluminum-plastic film is utilized, jigging separation is adopted and wet screening is matched, and the relatively pure aluminum-plastic film can be separated; and finally, drying and crushing the residual substances, and then realizing effective separation of valuable substances by screening and grading and specific gravity sorting.
The recovery method can realize that the membrane recovery rate is more than 95 percent and the purity is more than 97 percent; the recovery rate of the aluminum-plastic film is more than 98 percent, and the purity is more than 98 percent; the recovery rate of the anode powder and the cathode powder is more than 95 percent, and the purity is more than 98 percent; the recovery rate of copper particles is more than 92 percent, and the purity is more than 96 percent; the recovery rate of the aluminum particles is more than 90 percent, and the purity is more than 90 percent. It can be seen that the recovery method of the invention has a very promising application prospect.
Drawings
Fig. 1 is a flow chart of a method for recovering a waste soft package lithium battery in the invention.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the specific embodiments illustrated. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The invention discloses a method for recovering waste soft package lithium batteries, which comprises the following specific steps as shown in figure 1:
the waste soft package lithium batteries to be recycled are connected in series, in parallel or in series-parallel, and are connected into a load resistor and a path for discharging, so that the waste soft package lithium batteries are connected in series, in parallel or in series-parallel, and are judged and selected mainly according to the size and the capacity specification of the soft package batteries, so that the discharging efficiency can be improved, and the series-parallel connection refers to both series connection and parallel connection;
cutting and splitting the discharged waste soft package lithium battery into aluminum plastic films, standing to enable the electrolyte to flow out fully and collecting, wherein the standing is to enable the electrolyte to flow out fully, so that the standing time is not specifically limited, and in some specific embodiments of the invention, the standing time is 5-10 min;
shredding the split waste soft package lithium battery, further crushing to obtain particles, and winnowing to separate a diaphragm;
separating the air-separated particles by jigging through the movement of a blast water flow to obtain particles with higher density and particles with lower density, wherein the particles with higher density are positive and negative electrode fluids, and the particles with lower density are an aluminum plastic film, negative electrode powder and positive electrode powder;
wet sieving the particles with smaller density to obtain an oversize product aluminum plastic film and an undersize product 1#Positive and negative electrode powders;
drying the particles with larger density and then crushing the dried particles to obtain fine particles;
classifying the fine particles by screening to obtain 2#Positive and negative electrode powders;
and separating the fine particles after screening and grading into copper particles and aluminum particles by sorting according to the specific gravity difference of the copper particles and the aluminum particles.
According to the invention, the waste soft package lithium battery is connected to the load resistor for discharging in a series, parallel or series-parallel mode, so that the requirements of discharging equipment can be simplified, and the discharging efficiency is greatly improved; the electrolyte is collected by splitting the aluminum plastic film, so that the problem of recycling most of the electrolyte can be effectively solved; the diaphragm is light after being crushed, and air separation is carried out in advance, so that the condition that the positive and negative electrode powders are coated by contraction and agglomeration of the diaphragm due to high drying temperature can be avoided, and the loss of the positive and negative electrode powders can be greatly reduced; further, the relatively low density of the aluminum-plastic film is utilized, jigging separation is adopted and wet screening is matched, and the relatively pure aluminum-plastic film can be separated; and finally, drying and crushing the residual substances, and then realizing effective separation of valuable substances by screening and grading and specific gravity sorting. The recovery method provided by the invention realizes complete recovery of the waste soft package lithium battery, and the recovery rate and the recovery purity are higher.
Furthermore, in order to avoid safety problems such as smoke generation, ignition and even explosion during subsequent crushing, the battery needs to be discharged before being recycled, which is a safety concern of subsequent processes; further, in order to prevent the battery from being damaged and leaking liquid in the discharging process, therefore, the load is selected for discharging, the discharging parameters can be adjusted according to the model and the connection mode of the waste soft package lithium battery, and therefore, no specific limitation is made, in some preferred embodiments of the present invention, the cut-off voltage of the discharging is controlled to be 0.5-1.5V, in the discharging process, in order to ensure the circuit safety, the temperature of the waste soft package lithium battery and the temperature of the load resistor need to be monitored, wherein preferably, the temperature of the waste soft package lithium battery is controlled not to exceed T +20 ℃, T is the ambient temperature, and the temperature of the load resistor does not exceed 150 ℃.
Further, the step of cutting and splitting the discharged waste soft package lithium battery specifically comprises: and splitting the discharged waste soft package lithium battery along the wide surface by adopting a cutting mode, wherein the cutting mode can adopt a conventional cutting mode in the field as long as the purpose of cutting can be realized, and specific examples include but are not limited to mechanical cutting, laser cutting or plasma cutting. Since most of the soft package batteries are relatively flat, in the embodiment of the present invention, the battery is preferably cut along a wide surface of the battery, so that the stressed surface is larger, and the battery is easier to implement by mechanical equipment.
Further, the step of shredding the split waste soft package lithium battery and then further crushing the crushed waste soft package lithium battery to obtain particles specifically comprises the following steps: the split waste soft package lithium battery is shredded to the granularity of less than or equal to 30-40mm, and then is further shredded to the granularity of less than or equal to 10-20mm, preferably, the battery is shredded first and then is shredded, so that the crushed material is uniform in granularity, and the subsequent sorting is facilitated.
Furthermore, in the jigging separation process, in order to facilitate subsequent separation, the feeding needs to be uniform, and the feeding speed is controlled to be 1-2 t/h.
Further, the screen adopted by the wet screening is a 0.25mm screen.
Further, the step of drying and then crushing the particles with higher density to obtain fine particles specifically comprises the following steps: drying the particles with larger density at the temperature of 200-500 ℃, crushing the particles until the particle size is less than or equal to 2-5mm, and purifying waste gas generated in the drying process to reach the standard and discharging.
Further, the screen of the screening and grading is selected to be 0.125-0.25 mm.
The technical solution of the present invention will be more clearly and completely described below with reference to specific embodiments.
Example 1
After 12 scrapped lithium iron phosphate soft-package lithium batteries with the sizes of 210mm multiplied by 156mm multiplied by 12mm and 50Ah are connected in parallel, a load resistor is connected to a main line and a path is kept for discharging, and the discharge cut-off voltage is controlled to be 1.5V. In the discharging process, in order to ensure the circuit safety, the temperature of the waste soft package lithium battery is controlled to be less than or equal to 40 ℃ (the ambient temperature is plus 20 ℃), and the temperature of the load resistor is controlled to be less than or equal to 150 ℃.
And splitting the aluminum-plastic film along the wide surface by adopting a laser cutting mode, standing for 10min, and allowing the electrolyte to flow out through the diversion trench and be collected.
And (3) shredding the soft-package lithium battery with the electrolyte drained off to the granularity of less than or equal to 30mm by using a shredder, then crushing the soft-package lithium battery with the electrolyte to the granularity of less than or equal to 15mm by using a crusher, and then winnowing the diaphragm by using a high-pressure fan.
After the diaphragm is removed, a jigger is utilized to separate particles with relatively high density, such as anode and cathode fluids, from particles with relatively low density, such as aluminum plastic films, cathode powder, anode powder and the like, by means of the movement of the blast water flow, the feeding is uniform in the separation process, and the speed is controlled to be 1 t/h.
Sieving the obtained granules with relatively low density with 0.25mm sieve, and wet-sieving to obtain aluminum plastic film and undersize 1#And positive and negative electrode powders.
Drying the obtained particles with relatively high density at 500 deg.C, pulverizing to particle size of less than or equal to 2mm, sieving with 0.125mm sieve to obtain 2#And positive and negative electrode powders.
And finally, separating the copper particles and the aluminum particles by a specific gravity separator according to the specific gravity difference between the copper particles and the aluminum particles.
The recovery rate and purity of each valuable substance obtained by recovery are as follows:
example 2
20 scrapped lithium manganate soft-package lithium batteries with the size of 255mm multiplied by 16mm multiplied by 12mm and 10Ah are connected in series by 10, then a load resistor is connected and a path is kept for discharging, and the discharge cut-off voltage is controlled at 1.0V. In the discharging process, in order to ensure the safety of the circuit, the temperature of the soft package lithium battery is controlled to be less than or equal to 47 ℃ (the ambient temperature is plus 20 ℃), and the temperature of the load resistor is controlled to be less than or equal to 150 ℃.
And splitting the aluminum-plastic film along the wide surface by adopting a mechanical cutting mode, standing for 5min, and allowing the electrolyte to flow out through the diversion trench and be collected.
And (3) shredding the soft-packaged lithium battery with the electrolyte drained off to the granularity of less than or equal to 40mm by using a shredder, then crushing the soft-packaged lithium battery with the electrolyte to the granularity of less than or equal to 20mm by using a crusher, and then winnowing the diaphragm by using a high-pressure fan.
After the diaphragm is removed, a jigger is utilized to separate particles with relatively high density, such as anode and cathode fluids, from particles with relatively low density, such as aluminum plastic films, graphite cathode powder, anode powder and the like, by means of the movement of the blast water flow, the feeding is uniform in the jigging separation process, and the speed is controlled to be 1 t/h.
Sieving the obtained granules with relatively low density with 0.25mm sieve and wet sieveRespectively obtaining an aluminum plastic film of a granularity oversize product and an undersize product 1#And positive and negative electrode powders.
Drying the obtained particles with relatively high density at 200 deg.C, pulverizing to particle size of less than or equal to 5mm, sieving with 0.25mm sieve to obtain 2#And positive and negative electrode powders.
And finally, separating the copper particles and the aluminum particles by a specific gravity separator according to the specific gravity difference between the copper particles and the aluminum particles.
The recovery rate and purity of each valuable substance obtained by recovery are as follows:
example 3
10 scrapped nickel-cobalt-manganese ternary soft-package lithium batteries with the size of 227mm multiplied by 162mm multiplied by 8mm and 36Ah are connected in series after being connected in parallel for 2, a load resistor is connected and a circuit is kept for discharging, and the discharge cut-off voltage is controlled to be 0.5V. In the discharging process, in order to ensure the safety of the circuit, the temperature of the soft package lithium battery is controlled to be less than or equal to 44 ℃ (the ambient temperature is plus 20 ℃), and the temperature of the load resistor is controlled to be less than or equal to 150 ℃.
And cutting the aluminum-plastic film along the wide surface in a plasma cutting mode, standing for 10min, and allowing the electrolyte to flow out through the diversion trench and be collected.
And (3) shredding the soft-packaged lithium battery with the electrolyte drained off to the granularity of less than or equal to 40mm by using a shredder, then crushing the soft-packaged lithium battery with the electrolyte to the granularity of less than or equal to 15mm by using a crusher, and then winnowing the diaphragm by using a high-pressure fan.
After the diaphragm is removed, a jigger is utilized to separate particles with relatively high density, such as anode and cathode fluids, from particles with relatively low density, such as aluminum plastic films, graphite cathode powder, anode powder and the like, by means of the movement of the blast water flow, in the jigging separation process, the feeding is uniform, and the speed is controlled to be 2 t/h.
Sieving the obtained granules with relatively low density with 0.25mm sieve, and wet-sieving to obtain aluminum plastic film and undersize 1#And positive and negative electrode powders.
Drying the obtained granules with relatively high density at 300 ℃ to obtain powderCrushing to a particle size of less than or equal to 2mm, sieving with a classifying screen with a screen mesh of 0.125mm to obtain 2#And positive and negative electrode powders.
And finally, separating the copper particles and the aluminum particles by a specific gravity separator according to the specific gravity difference between the copper particles and the aluminum particles.
The recovery rate and purity of each valuable substance obtained by recovery are as follows:
the test results in the examples 1 to 3 show that the recovery method of the waste soft package lithium battery can realize the recovery of all valuable substances, and has high recovery rate and purity, the recovery rate of the diaphragm is more than 95 percent, and the purity is more than 97 percent; the recovery rate of the aluminum-plastic film is more than 98 percent, and the purity is more than 98 percent; the recovery rate of the anode powder and the cathode powder is more than 95 percent, and the purity is more than 98 percent; the recovery rate of copper particles is more than 92 percent, and the purity is more than 96 percent; the recovery rate of the aluminum particles is more than 90 percent, and the purity is more than 90 percent.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The method for recycling the waste soft package lithium battery is characterized by comprising the following steps of:
connecting waste soft package lithium batteries to be recovered in series, parallel or series-parallel connection, and connecting a load resistor and keeping a path to discharge;
cutting and splitting the discharged waste soft package lithium battery into aluminum plastic films, standing, and fully flowing out and collecting electrolyte;
shredding the split waste soft package lithium battery, further crushing to obtain particles, and winnowing to separate a diaphragm;
separating the air-separated particles by jigging through the movement of a blast water flow to obtain particles with higher density and particles with lower density, wherein the particles with higher density are positive and negative electrode fluids, and the particles with lower density are an aluminum plastic film, negative electrode powder and positive electrode powder;
wet sieving the particles with smaller density to obtain an oversize product aluminum plastic film and an undersize product 1#Positive and negative electrode powders;
drying the particles with larger density and then crushing the dried particles to obtain fine particles;
classifying the fine particles by screening to obtain 2#Positive and negative electrode powders;
and separating the fine particles after screening and grading into copper particles and aluminum particles by sorting according to the specific gravity difference of the copper particles and the aluminum particles.
2. The recycling method of the waste soft package lithium battery as claimed in claim 1, wherein the cut-off voltage of the discharge is controlled to be 0.5-1.5V, the temperature of the waste soft package lithium battery is controlled not to exceed T +20 ℃, T is the ambient temperature, and the temperature of the load resistor is controlled not to exceed 150 ℃.
3. The method for recycling the waste soft package lithium battery as claimed in claim 1, wherein the step of cutting and splitting the discharged waste soft package lithium battery is specifically as follows: and splitting the discharged waste soft package lithium battery along the wide surface by adopting a cutting mode, wherein the cutting mode comprises mechanical cutting, laser cutting or plasma cutting.
4. The method for recycling the waste soft-package lithium batteries according to claim 1, wherein the step of shredding the split waste soft-package lithium batteries and then further crushing the shredded waste soft-package lithium batteries to obtain particles specifically comprises the following steps: and shredding the split waste soft package lithium battery until the granularity is less than or equal to 30-40mm, and further crushing until the granularity is less than or equal to 10-20 mm.
5. The recycling method of the waste soft-package lithium batteries as claimed in claim 1, wherein in the jigging separation process, the feeding needs to be uniform, and the feeding speed is controlled to be 1-2 t/h.
6. The method for recycling the waste soft-packaged lithium batteries according to claim 1, wherein the screen mesh adopted by the wet screening is a 0.25mm screen mesh.
7. The method for recycling the waste soft-package lithium batteries according to claim 1, wherein the step of drying and crushing the particles with the higher density to obtain fine particles comprises the following specific steps: drying the particles with larger density at the temperature of 200-500 ℃, crushing the particles until the particle size is less than or equal to 2-5mm, and purifying waste gas generated in the drying process to reach the standard and discharging.
8. The recycling method of the waste soft package lithium batteries as claimed in claim 1, wherein the screen of the screening classification is selected to be 0.125-0.25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010547593.9A CN111822140B (en) | 2020-06-16 | 2020-06-16 | Recovery method of waste soft package lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010547593.9A CN111822140B (en) | 2020-06-16 | 2020-06-16 | Recovery method of waste soft package lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111822140A true CN111822140A (en) | 2020-10-27 |
| CN111822140B CN111822140B (en) | 2021-12-17 |
Family
ID=72898722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010547593.9A Active CN111822140B (en) | 2020-06-16 | 2020-06-16 | Recovery method of waste soft package lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111822140B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113426804A (en) * | 2021-06-23 | 2021-09-24 | 上海第二工业大学 | Physical separation and enrichment method for resource components of waste lithium ion battery |
| CN114272678A (en) * | 2021-11-17 | 2022-04-05 | 合肥国轩电池材料有限公司 | Industrial wet-screening treatment equipment and treatment method for lithium iron phosphate powder material |
| CN114289313A (en) * | 2021-12-31 | 2022-04-08 | 湖南江冶新能源科技股份有限公司 | Winnowing process and equipment under protection of circulating inert gas |
| WO2022151975A1 (en) * | 2021-01-13 | 2022-07-21 | 陈妹妹 | Safe discharging method for waste lithium-ion battery |
| CN115347266A (en) * | 2022-10-19 | 2022-11-15 | 广州天赐高新材料股份有限公司 | Wet crushing and recycling method and device for waste lithium ion batteries |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3314616A (en) * | 1963-11-08 | 1967-04-18 | Denver Equip Co | Integral ore milling assembly and method of concentration |
| JP2000215881A (en) * | 1999-01-26 | 2000-08-04 | Tookado:Kk | Lead plate mounting jig for battery |
| CA2367544A1 (en) * | 2002-01-08 | 2003-07-08 | Boleslaw Ignasiak | Method for spent potliner processing, separating and recycling the products therefrom |
| CA2387528A1 (en) * | 2002-05-27 | 2003-11-27 | Institut National De La Recherche Scientifique | Decontamination of heterogeneous solid materials |
| CN104347906A (en) * | 2014-09-11 | 2015-02-11 | 天津理工大学 | Green recovery processing method of electrolyte inside waste power battery |
| CN106299530A (en) * | 2016-09-27 | 2017-01-04 | 中国电子科技集团公司第十八研究所 | A kind of new-energy automobile power-type lithium ion battery disassemble classification recovery process method |
| CN108615956A (en) * | 2018-06-14 | 2018-10-02 | 河南巨峰环保科技有限公司 | A kind of electric discharge dynamic lithium battery recovery process |
| CN108736087A (en) * | 2018-05-23 | 2018-11-02 | 深圳市恒创睿能环保科技有限公司 | A kind of technique that hydrometallurgic recovery discards valuable constituent in power battery |
| CN208208918U (en) * | 2018-02-26 | 2018-12-07 | 荆门市格林美新材料有限公司 | A kind of dismantling recovery system of waste lithium cell |
| CN109022803A (en) * | 2018-09-05 | 2018-12-18 | 合肥国轩电池材料有限公司 | The recovery method of elemental lithium during a kind of waste phosphoric acid lithium iron battery is positive |
| CN109473747A (en) * | 2018-09-11 | 2019-03-15 | 天能电池集团有限公司 | A kind of waste and old lithium ion battery dismantling recovery method |
| KR20190059593A (en) * | 2017-11-23 | 2019-05-31 | 서정록 | battery cell selection and storage equipment |
| CN110639691A (en) * | 2019-08-29 | 2020-01-03 | 浙江浙矿重工股份有限公司 | Multistage diachylon precipitation and sorting method for waste lead-acid storage batteries |
| CN111085334A (en) * | 2019-12-10 | 2020-05-01 | 银隆新能源股份有限公司 | Method for recycling waste power batteries by reselection method and jigging equipment |
-
2020
- 2020-06-16 CN CN202010547593.9A patent/CN111822140B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3314616A (en) * | 1963-11-08 | 1967-04-18 | Denver Equip Co | Integral ore milling assembly and method of concentration |
| JP2000215881A (en) * | 1999-01-26 | 2000-08-04 | Tookado:Kk | Lead plate mounting jig for battery |
| CA2367544A1 (en) * | 2002-01-08 | 2003-07-08 | Boleslaw Ignasiak | Method for spent potliner processing, separating and recycling the products therefrom |
| CA2387528A1 (en) * | 2002-05-27 | 2003-11-27 | Institut National De La Recherche Scientifique | Decontamination of heterogeneous solid materials |
| CN104347906A (en) * | 2014-09-11 | 2015-02-11 | 天津理工大学 | Green recovery processing method of electrolyte inside waste power battery |
| CN106299530A (en) * | 2016-09-27 | 2017-01-04 | 中国电子科技集团公司第十八研究所 | A kind of new-energy automobile power-type lithium ion battery disassemble classification recovery process method |
| KR20190059593A (en) * | 2017-11-23 | 2019-05-31 | 서정록 | battery cell selection and storage equipment |
| CN208208918U (en) * | 2018-02-26 | 2018-12-07 | 荆门市格林美新材料有限公司 | A kind of dismantling recovery system of waste lithium cell |
| CN108736087A (en) * | 2018-05-23 | 2018-11-02 | 深圳市恒创睿能环保科技有限公司 | A kind of technique that hydrometallurgic recovery discards valuable constituent in power battery |
| CN108615956A (en) * | 2018-06-14 | 2018-10-02 | 河南巨峰环保科技有限公司 | A kind of electric discharge dynamic lithium battery recovery process |
| CN109022803A (en) * | 2018-09-05 | 2018-12-18 | 合肥国轩电池材料有限公司 | The recovery method of elemental lithium during a kind of waste phosphoric acid lithium iron battery is positive |
| CN109473747A (en) * | 2018-09-11 | 2019-03-15 | 天能电池集团有限公司 | A kind of waste and old lithium ion battery dismantling recovery method |
| CN110639691A (en) * | 2019-08-29 | 2020-01-03 | 浙江浙矿重工股份有限公司 | Multistage diachylon precipitation and sorting method for waste lead-acid storage batteries |
| CN111085334A (en) * | 2019-12-10 | 2020-05-01 | 银隆新能源股份有限公司 | Method for recycling waste power batteries by reselection method and jigging equipment |
Non-Patent Citations (1)
| Title |
|---|
| 柳衡琪等: ""选矿技术在其它领域的应用"", 《国外金属矿选矿》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022151975A1 (en) * | 2021-01-13 | 2022-07-21 | 陈妹妹 | Safe discharging method for waste lithium-ion battery |
| US11967687B2 (en) | 2021-01-13 | 2024-04-23 | Shenzhen Jiecheng nickel cobalt New Energy Technology Co., Ltd. | Safe discharge method for waste lithium ion batteries |
| CN113426804A (en) * | 2021-06-23 | 2021-09-24 | 上海第二工业大学 | Physical separation and enrichment method for resource components of waste lithium ion battery |
| CN114272678A (en) * | 2021-11-17 | 2022-04-05 | 合肥国轩电池材料有限公司 | Industrial wet-screening treatment equipment and treatment method for lithium iron phosphate powder material |
| CN114289313A (en) * | 2021-12-31 | 2022-04-08 | 湖南江冶新能源科技股份有限公司 | Winnowing process and equipment under protection of circulating inert gas |
| CN114289313B (en) * | 2021-12-31 | 2023-03-24 | 湖南江冶新能源科技股份有限公司 | Winnowing process and equipment under protection of circulating inert gas |
| CN115347266A (en) * | 2022-10-19 | 2022-11-15 | 广州天赐高新材料股份有限公司 | Wet crushing and recycling method and device for waste lithium ion batteries |
| CN115347266B (en) * | 2022-10-19 | 2023-01-06 | 广州天赐高新材料股份有限公司 | Wet crushing and recycling method and device for waste lithium ion batteries |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111822140B (en) | 2021-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111822140B (en) | Recovery method of waste soft package lithium battery | |
| CN108927401B (en) | Crushing and recycling process after anaerobic cracking of lithium battery | |
| CN105826629B (en) | A kind of waste lithium cell full constituent feed separation collection device and method | |
| CN108110356B (en) | Full-automatic waste lithium ion battery recycling process and system | |
| CN108183277B (en) | Method for regenerating anode material of waste lithium ion battery | |
| CN109473747A (en) | A kind of waste and old lithium ion battery dismantling recovery method | |
| CN104577249A (en) | Method for recycling waste lithium cobalt oxide lithium ion battery | |
| CN205609702U (en) | Old and useless lithium cell complete set divides material separation collection device | |
| CN208226042U (en) | A kind of resource reclaiming system of old and useless battery | |
| CN112275765B (en) | Method for treating waste lithium battery diaphragm paper | |
| CN112121978B (en) | Processing equipment for pole piece crushing and sorting | |
| CN108134153A (en) | A kind of processing method of waste and old lithium ion battery | |
| CN102009054A (en) | Novel process for efficiently crushing waste lithium ion battery | |
| CN113067028A (en) | Recycling method of lithium iron phosphate retired lithium ion battery | |
| CN109852819A (en) | A kind of broken recovery method of the wet type of waste and old lithium ion battery | |
| CN109453867A (en) | A kind of herringbone tooth shear breaker and the broken method of waste lithium cell electrification | |
| CN114094224B (en) | High-efficiency treatment method for high-voltage waste lithium battery | |
| WO2023070801A1 (en) | Recovery method for valuable components of waste lithium-ion batteries | |
| CN113991203A (en) | Recovery processing device of waste charged lithium battery | |
| CN107492695A (en) | The separation method of positive/negative plate in a kind of lithium ion battery removal process | |
| JP6994418B2 (en) | Disposal device and treatment method for waste lithium-ion batteries | |
| CN216389511U (en) | Recovery processing device of waste charged lithium battery | |
| CN113083862B (en) | Dry pole piece treatment and recovery system with diaphragm and method | |
| CN115007614A (en) | Sorting method for broken materials of positive and negative pole pieces of waste lithium ion battery | |
| CN114381603A (en) | Method for fully recycling valuable metal components of waste lithium batteries from anode powder stripped by hydrodynamic sorting wet method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |