A battery pole piece sorting and recycling system and method

Abstract

The application provides a battery pole piece sorting and recycling system and method. The battery pole piece sorting and recycling system comprises a magnetic sorting unit, a shredding unit, a drying unit, a first crushing unit, a first separating unit, a second crushing unit, a second separating unit, a linear sorting unit and a material collecting unit connected in sequence. The application realizes fine sorting of battery pole piece powder, improves the recovery rate of high-value metal materials in the pole piece, and effectively reduces the impurity content of the finished product.

Description

Technical Field

[0001] This invention belongs to the field of battery recycling technology and relates to a battery electrode sorting and recycling system and method. Background Technology

[0002] Lithium-ion batteries are widely used in 3C consumer electronics, new energy vehicles, and energy storage. With the rapid development of new energy vehicles in recent years, the demand for lithium-ion power batteries has been increasing year by year. At the same time, the number of discarded and retired batteries is constantly increasing, and if not properly disposed of, it will cause huge pollution to the environment.

[0003] Currently, the recycling industry for retired power batteries is gradually emerging, mainly focusing on recovering rare or precious metals such as lithium, nickel, and cobalt from retired power batteries. Common battery cathode materials include lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, lithium manganese oxide, lithium iron phosphate, etc., which have high recycling value.

[0004] Existing recycling processes mainly include battery dismantling, electrode separation, electrode feeding, electrode conveying, electrode shredding, electrode crushing, material screening, and material collection. However, traditional recycling processes suffer from high energy consumption and low purity of recovered high-value components. Furthermore, in the battery electrode shredding process, metal fragments from the battery enter the shredder and crusher, easily damaging the screens and blades, increasing maintenance costs, and causing long replacement cycles, which seriously affects production progress. If metal fragments are manually selected, the incomplete selection directly affects the purity of the equipment and the finished product.

[0005] Therefore, there is an urgent need to design a battery powder sorting and recycling system to solve the above-mentioned technical problems. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a battery electrode sorting and recycling system and method, which realizes the fine sorting of battery electrode powder, improves the recovery rate of high-value metal materials in the electrode, and effectively reduces the impurity content of the finished product.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a battery electrode sorting and recycling system, comprising a magnetic sorting unit, a shredding unit, a drying unit, a first crushing unit, a first separation unit, a second crushing unit, a second separation unit, a linear sorting unit, and a collecting unit connected in sequence; the magnetic sorting unit is used to magnetically sort the battery electrodes; the shredding unit is used to shred the battery electrodes; the drying unit is used to dry the battery electrodes; the first crushing unit is used to crush the battery electrodes to obtain battery powder; the first separation unit is used to sieve the battery powder to obtain primary powder; the second crushing unit is used to perform secondary crushing on the primary powder; the second separation unit is used to sieve the primary powder after secondary crushing to obtain secondary powder; the linear sorting unit is used to perform enhanced sorting on the secondary powder to obtain metal powder; and the collecting unit is used to collect the metal powder.

[0009] The battery electrode sorting and recycling system provided by this invention integrates magnetic sorting, physical sorting and collection of battery electrodes, realizing fine sorting of battery electrode powder and improving the recovery rate of high-value metal materials in the electrodes. Furthermore, it solves the technical problem of equipment damage caused by metal debris mixed in with battery electrodes. At the same time, it effectively ensures the efficiency and accuracy of sorting, reduces the impurity content of the finished product, improves the purity of the finished product, saves energy, and effectively improves work efficiency.

[0010] It should be noted that the battery electrode sheet mentioned in this invention refers to the electrode sheet product obtained after disassembling and separating the electrode sheet from a retired battery.

[0011] As a preferred embodiment of the present invention, the magnetic separation unit includes a vibrating feeder, a first magnetic separator, and a second magnetic separator connected in sequence.

[0012] The vibrating feeding device includes a feeding frame connected to the first magnetic separator. A feeding drive mechanism is provided at the bottom of the feeding frame, and a collection container is provided below the feeding frame. The feeding drive mechanism drives the feeding frame to vibrate, so that the battery electrode sheets enter the first magnetic separator, and the metal debris in the battery electrode sheets falls into the collection container.

[0013] It should be noted that the present invention does not specifically limit the structure of the feeding drive mechanism. Any vibration mechanism that can drive the feeding frame to vibrate and screen out metal debris in the battery electrode can be used in the present invention.

[0014] The first magnetic separator includes a first magnetic separator component, a first collection container, a first collection platform, a first collection brush, and a first dust collection component. The first magnetic separator component is used to magnetically attract metal debris inside the battery electrode. The first collection brush is used to sweep the metal debris generated by the first magnetic separator component into the first collection platform. The first dust collection component is used to suck the metal debris on the first collection platform into the first collection container.

[0015] The second magnetic separator includes a second magnetic separator component, a second collection container, a second collection platform, a second collection brush, and a second dust collection component. The second magnetic separator component is used to magnetically attract metal debris inside the battery electrode. The second collection brush is used to sweep the metal debris generated by the second magnetic separator component into the second collection platform. The second dust collection component is used to suck the metal debris on the second collection platform into the second collection container.

[0016] The magnetic separation unit also includes a housing and a material conveyor belt. The first magnetic separator and the second magnetic separator are located inside the housing. The housing has a feed inlet, which is connected to the feeding drive mechanism. The material conveyor belt is located below the first magnetic separator and the second magnetic separator and is used to transport the battery electrode sheets that enter through the feed inlet and pass through the first magnetic separator and the second magnetic separator in sequence for magnetic separation.

[0017] During application, battery electrodes enter the vibrating feeder, where they are vibrated and sorted to remove metal debris. After being sorted by the vibrating feeder, the battery electrodes fall onto the material conveyor belt through the feed inlet of the casing. At this point, the battery electrodes are still vibrating and, under the action of the material conveyor belt, pass sequentially through the first and second magnetic separators to remove any remaining metal debris. Through one vibrating feed and two magnetic separations, the battery electrodes can effectively separate metal debris, ensuring both efficiency and accuracy in the sorting process. This also avoids the problem of metal debris damaging the equipment after entering the shredding unit, saves on manual sorting, ensures the purity of the finished product, and improves work efficiency.

[0018] As a preferred embodiment of the present invention, the first separation unit includes a first drum screen device, a first cyclone separator device, and a first collection device connected in sequence; the first drum screen device is used to screen battery powder; the first cyclone separator device is used to separate the screened battery powder to obtain battery electrode powder and primary powder; the first collection device is used to collect the battery electrode powder and primary powder respectively.

[0019] The first material collection device includes a first electrode powder collection section and a dust collection section. The first electrode powder collection section and the dust collection section are independently connected to the first cyclone separator. The first electrode powder collection section is used to filter and collect battery electrode powder, and the dust collection section is used to filter and collect primary powder. The dust collection section is connected to the second crushing unit.

[0020] The first powder collection unit includes a vibrating filter disc, a filter screen, a sorting screen and a first material collection component arranged from top to bottom. The powder collection unit includes a primary vibrating filter disc, a primary filter screen, a primary sorting screen and a second material collection component arranged from top to bottom.

[0021] The second receiving assembly is also provided with an electrostatic adsorption component; at least two staggered guide plates are also provided in the second receiving assembly along the flow direction of the primary powder to control the flow speed of the primary powder.

[0022] During application, the battery electrode sheets are shredded into fragments by the shredding unit, then dried in the drying unit, and finally fed into the first crushing unit for multi-stage crushing to form battery powder. The battery powder is then screened by the first drum screen device, followed by cyclone separation in the first cyclone separator to obtain battery electrode powder and primary powder. The battery electrode powder is then filtered and packaged in the electrode powder collection unit, while the primary powder is filtered and collected in the dust collection unit before being sent back to the second crushing unit for further crushing.

[0023] As a preferred embodiment of the present invention, the second separation unit includes a second drum screen device, a second cyclone separator device, and a second collection device connected in sequence; the second drum screen device is used to screen the primary powder; the second cyclone separator device is used to separate the screened primary powder to obtain battery electrode powder and secondary powder; the second collection device is used to collect the battery electrode powder and secondary powder respectively.

[0024] The second collecting device includes a second electrode powder collecting section and a grinding and kneading section. The second electrode powder collecting section and the grinding and kneading section are independently connected to the second cyclone separator. The second electrode powder collecting section is used to filter and collect battery electrode powder, and the grinding and kneading section is used to filter and collect secondary powder. The grinding and kneading section is connected to the linear sorting unit.

[0025] The second polar powder collection section includes, from top to bottom, two-stage vibrating filter discs, two-stage filter screens, two-stage sorting screens, and a first material collection component. The grinding and kneading section includes, from top to bottom, a grinding disc, a secondary filter screen, a secondary sorting screen, and a second material collection component.

[0026] During application, the battery electrode sheets are crushed in multiple stages by the second crushing unit, then enter the second drum screen device for screening, and then enter the second cyclone separator device for cyclone separation to obtain battery electrode powder and secondary powder. The battery electrode powder then enters the electrode powder collection section for filtration and packaging collection, while the secondary powder enters the grinding and kneading section for filtration and collection, and is then sent back to the linear sorting unit for enhanced sorting.

[0027] As a preferred embodiment of the present invention, the linear sorting unit includes a linear sorting frame, a support platform, a first vibration motor and a second vibration motor. The linear sorting frame is connected to the support platform through a plurality of first vibration springs. The first vibration motor is connected to the bottom of the linear sorting frame and is used to drive the linear sorting frame to vibrate.

[0028] A powder screen assembly is movably disposed within the linear sorting frame. The powder screen assembly is connected to the linear sorting frame via several second vibration springs. A second vibration motor is connected to the bottom of the powder screen assembly to drive the powder screen assembly to vibrate.

[0029] At least one disc screen unit is also provided between the linear sorting unit and the receiving unit, and the disc screen unit is used to perform enhanced screening of secondary powder.

[0030] The battery electrode sorting and recycling system further includes a diaphragm collection unit, which is connected to the linear sorting unit.

[0031] The secondary powder, after being separated by the second separation unit, contains a small amount of broken diaphragms. After entering the linear sorting unit, the diaphragms in the secondary powder are separated by strong vibration and gravity and then collected in the diaphragm collection unit. The metal powder enters the disc screen unit for final sieving, which effectively improves the purity of the metal powder.

[0032] As a preferred embodiment of the present invention, the receiving unit includes a powder conveying device, a storage device, and a metering device. The powder conveying device is connected to the linear sorting unit and is used to convey the collected metal powder to the storage device. The metering device is used to measure the storage device and is also electrically connected to the powder conveying device.

[0033] The metering device includes a metering component, a pressure sensing component, an information receiving component, and an alarm component. The metering component is used to weigh the storage device. The pressure sensing component is electrically connected to the metering component and the information receiving component. The information receiving component is also electrically connected to the alarm component and the powder conveying device.

[0034] As a preferred embodiment of the present invention, the battery electrode sorting and recycling system further includes a conveyor belt device, which is used to transport battery electrodes sequentially through the magnetic sorting unit, shredding unit, drying unit, first crushing unit, first separation unit, second crushing unit, second separation unit, linear sorting unit and receiving unit.

[0035] The shredding unit includes a shredding device, the drying unit includes a drying device, and the first crushing unit and the second crushing unit respectively include a first crushing device and a second crushing device.

[0036] The feed end of the shredding device is connected to the magnetic separation unit via the conveyor belt device, the discharge end of the shredding device is connected to the feed end of the drying device via the conveyor belt device, the discharge end of the drying device is connected to the feed end of the first crushing device via the conveyor belt device, the discharge end of the first crushing device is connected to the first separation unit via the conveyor belt device, and the feed end and discharge end of the second crushing device are respectively connected to the first separation unit and the second separation unit via the conveyor belt device.

[0037] Secondly, the present invention provides a method for sorting and recycling battery electrodes, wherein the method employs the battery electrode sorting and recycling system described in the first aspect for recycling battery electrodes, and the method includes:

[0038] The battery electrodes are subjected to magnetic separation, shredding, drying, primary crushing, primary sieving, secondary crushing, secondary sieving, and linear separation in sequence to obtain metal powder, which is then collected.

[0039] The battery electrode sorting and recycling method provided by this invention can effectively achieve fine sorting of electrode powder, ensure sorting efficiency and accuracy, improve the recovery rate of metal powder, and reduce impurities in the product to obtain high-purity metal powder.

[0040] As a preferred embodiment of the present invention, the battery electrode sorting and recycling method specifically includes:

[0041] S1 uses a magnetic separation unit to sequentially perform vibration separation, primary magnetic separation and secondary magnetic separation on the battery electrode sheets to remove metal debris from the battery electrode sheets. The battery electrode sheets after secondary magnetic separation are then conveyed to the shredding unit for shredding to obtain fragmented material.

[0042] S2 transports the fragmented material from step S1 to the drying unit for drying to obtain dried battery electrode sheets. The first crushing unit then crushes the battery electrode sheets once to form battery powder.

[0043] S3 feeds the battery powder from step S2 into the first separation unit for a first drum sieve and a first cyclone separation to form battery electrode powder and primary powder. The battery electrode powder is then subjected to vibration filtration, a first screen filtration, and a second screen filtration before being packaged and collected. The primary powder is then subjected to vibration filtration, a first screen filtration, and a second screen filtration before being collected, thus achieving a first sieve. The primary powder is then conveyed to the second crushing unit for secondary crushing.

[0044] S4 feeds the primary powder after secondary crushing in step S3 into the second separation unit for secondary drum screening and second cyclone separation to form battery electrode powder and secondary powder. The battery electrode powder is then subjected to vibration filtration, primary screen filtration and secondary screen filtration in sequence before being packaged and collected. The secondary powder is then subjected to grinding and sorting, filtration and screening and tertiary screen filtration in sequence to achieve secondary screening.

[0045] S5 then feeds the secondary powder from step S4 into the linear sorting unit for enhanced sorting to obtain diaphragm byproducts and metal powder. The diaphragm byproducts are packaged and collected, and the metal powder is screened at least once by a disc sieve and then sent to the receiving unit for collection.

[0046] As a preferred technical solution of the present invention, in step S1, the frequency of the vibration sorting is 3 to 7 Hz, for example, it can be 3.0 Hz, 3.5 Hz, 4.0 Hz, 4.5 Hz, 5.0 Hz, 5.5 Hz, 6.0 Hz, 6.5 Hz or 7 Hz, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 4 to 6 Hz.

[0047] The magnetic induction intensity of the first magnetic separation is 1000 to 2000 Gs, for example, it can be 1000 Gs, 1100 Gs, 1200 Gs, 1300 Gs, 1400 Gs, 1450 Gs, 1500 Gs, 1550 Gs, 1600 Gs, 1700 Gs, 1800 Gs, 1900 Gs or 2000 Gs, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 1400 to 1600 Gs.

[0048] The magnetic induction intensity of the secondary magnetic separation is 1500 to 2500 Gs, for example, it can be 1500 Gs, 1600 Gs, 1700 Gs, 1800 Gs, 1900 Gs, 2000 Gs, 2100 Gs, 2150 Gs, 2200 Gs, 2300 Gs, 2400 Gs or 2500 Gs, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 1800 to 2200 Gs.

[0049] The transfer rate of the battery electrode sheets in the primary and secondary magnetic separation is 50 to 70 r / min, for example, it can be 50 r / min, 52 r / min, 53 r / min, 55 r / min, 58 r / min, 60 r / min, 62 r / min, 63 r / min, 65 r / min, 68 r / min or 70 r / min, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 55 to 65 r / min.

[0050] The average particle size of the fragmented material is 2 to 6 cm, for example, it can be 2.0 cm, 2.5 cm, 3.0 cm, 3.5 cm, 4.0 cm, 4.5 cm, 5.0 cm, 5.5 cm or 6 cm, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 3 to 5 cm.

[0051] In step S2, the drying temperature is 150-250℃, for example, it can be 150℃, 155℃, 160℃, 170℃, 175℃, 180℃, 200℃, 210℃, 215℃, 220℃, 225℃, 230℃, 235℃, 240℃, 245℃ or 250℃, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 175-225℃.

[0052] In step S3, the frequency of the vibration filter is 100 to 200 Hz, for example, it can be 100 Hz, 110 Hz, 120 Hz, 130 Hz, 140 Hz, 150 Hz, 160 Hz, 170 Hz, 180 Hz, 190 Hz or 200 Hz, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 120 to 180 Hz.

[0053] The average particle size of the battery electrode powder after secondary sieve filtration is 60-180 μm, for example, it can be 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm or 180 μm, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 80-160 μm.

[0054] The average particle size of the primary powder after secondary filtration is 80–200 μm, for example, it can be 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm or 200 μm, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 100–180 μm.

[0055] In step S4, the frequency of the vibration filter is 150 to 250 Hz, for example, it can be 150 Hz, 155 Hz, 160 Hz, 170 Hz, 175 Hz, 180 Hz, 200 Hz, 210 Hz, 215 Hz, 220 Hz, 225 Hz, 230 Hz, 235 Hz, 240 Hz, 245 Hz or 250 Hz, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 170 to 220 Hz.

[0056] The average particle size of the battery electrode powder after secondary sieve filtration is 30-150 μm, for example, it can be 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 130 μm, 140 μm or 150 μm, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 50-130 μm.

[0057] The average particle size of the secondary powder after the three-screen filtration is 50-170 μm, for example, it can be 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm or 170 μm, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 70-150 μm.

[0058] In step S5, the average particle size of the collected metal powder is 2-8 mm, preferably 3-7 mm.

[0059] The numerical range described in this invention includes not only the point values ​​listed above, but also any point values ​​within the numerical ranges not listed above. Due to space limitations and for the sake of brevity, this invention will not exhaustively list all the specific point values ​​included in the range.

[0060] The system refers to an equipment system, a unit system, or a production unit.

[0061] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0062] This invention provides a battery electrode sorting and recycling system and method that integrates magnetic sorting, physical sorting, and collection of battery electrodes. It achieves fine sorting of battery electrode powder, improves the recovery rate of high-value metal materials in the electrodes, and solves the technical problem of equipment damage caused by metal debris mixed in with battery electrodes. At the same time, it effectively ensures the efficiency and accuracy of sorting, reduces the impurity content of the finished product, improves the purity of the finished product, saves energy, and effectively improves work efficiency. Attached Figure Description

[0063] Figure 1 A connection diagram of a battery electrode sorting and recycling system provided in a specific embodiment of the present invention;

[0064] Figure 2 A connection diagram of a battery electrode sorting and recycling system provided in a specific embodiment of the present invention;

[0065] Figure 3 This is a schematic diagram of the structure of a magnetic sorting unit provided in a specific embodiment of the present invention;

[0066] Figure 4 A schematic diagram of the structure of a first drum screen device provided in a specific embodiment of the present invention;

[0067] Figure 5 A schematic diagram of the structure of the first cyclone separator and the first material collection device provided in a specific embodiment of the present invention;

[0068] Figure 6 A schematic diagram of the structure of a linear sorting unit provided in a specific embodiment of the present invention;

[0069] Figure 7 This is a schematic diagram of the structure of a receiving unit provided in a specific embodiment of the present invention;

[0070] Figure 8 A flowchart illustrating a specific embodiment of the battery electrode sorting and recycling method provided by the present invention;

[0071] Figure 9 A flowchart of magnetic sorting processing is provided for a specific embodiment of the present invention;

[0072] Figure 10 A flowchart of a single screening process provided for a specific embodiment of the present invention;

[0073] Figure 11 A flowchart illustrating the secondary screening process provided in a specific embodiment of the present invention;

[0074] Figure 12 A flowchart illustrating the enhanced sorting process provided in a specific embodiment of the present invention;

[0075] Figure 13 A flowchart illustrating the process of collecting finished products according to a specific embodiment of the present invention.

[0076] Wherein, 1-magnetic separation unit; 101-vibrating feeding device; 1011-feeding frame; 1012-feeding drive mechanism; 102-first magnetic separator; 1021-first magnetic separator component; 1022-first collection container; 1023-first collection platform; 1024-first collection brush; 1025-first dust collection component; 103-second magnetic separator; 1031-second magnetic separator component; 1032-second collection container; 1033-second collection platform; 1034- Second collecting brush; 1035 - Second dust suction component; 104 - Material conveyor belt; 105 - Housing; 2 - Shredding unit; 201 - Shredding device; 3 - Drying unit; 301 - Drying device; 4 - First crushing unit; 401 - First crushing device; 5 - First separation unit; 501 - First drum screen device; 5011 - Cleaning mechanism; 502 - First cyclone separator; 503 - First material collection device; 504 - First high-performance powder collection section; 5041 - Section of vibrating screen Filter disc; 5042 - First stage filter screen; 5043 - First stage sorting screen; 5044 - First receiving assembly; 505 - Powder collection section; 5051 - Primary vibrating filter disc; 5052 - Primary filter screen; 5053 - Primary sorting screen; 5054 - Second receiving assembly; 5055 - Electrostatic adsorption component; 5056 - Guide plate; 6 - Second crushing unit; 601 - Second crushing device; 7 - Second separation unit; 701 - Second drum screen device; 70 2-Second cyclone separator; 703-Second material collection device; 704-Second powder collection section; 705-Grinding and kneading section; 8-Linear sorting unit; 801-Linear sorting frame; 8011-Powder screen assembly; 802-Supporting platform; 803-First vibrating motor; 804-Second vibrating motor; 9-Disc screen unit; 901-Disc screen device; 10-Receiving unit; 1001-Powder conveying device; 1002-Storage device; 1003-Metering device. Detailed Implementation

[0077] It should be understood that in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the referred unit or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0078] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0079] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0080] In one specific embodiment, the present invention provides a battery electrode sorting and recycling system, such as... Figure 1 As shown, the system includes a magnetic sorting unit 1, a shredding unit 2, a drying unit 3, a first crushing unit 4, a first separation unit 5, a second crushing unit 6, a second separation unit 7, a linear sorting unit 8, and a collecting unit 10, connected in sequence. The magnetic sorting unit 1 is used for magnetic sorting of battery electrodes; the shredding unit 2 is used for shredding battery electrodes; the drying unit 3 is used for drying battery electrodes; the first crushing unit 4 is used for crushing battery electrodes to obtain battery powder; the first separation unit 5 is used for sieving the battery powder to obtain primary powder; the second crushing unit 6 is used for secondary crushing of the primary powder; the second separation unit 7 is used for sieving the primary powder after secondary crushing to obtain secondary powder; the linear sorting unit 8 is used for enhanced sorting of the secondary powder to obtain metal powder; and the collecting unit 10 is used to collect the metal powder.

[0081] In some implementations, such as Figure 2 and Figure 3As shown, the magnetic separation unit 1 includes a vibrating feed device 101, a first magnetic separator 102, and a second magnetic separator 103 connected in sequence. The vibrating feed device 101 includes a feed frame 1011, which is connected to the first magnetic separator 102. A feeding drive mechanism 1012 is provided at the bottom of the feed frame 1011, and a collection container is also provided below the feed frame 1011. The feeding drive mechanism 1012 drives the feed frame 1011 to vibrate, causing the battery electrode sheets to enter the first magnetic separator, and the metal debris inside the battery electrode sheets falls into the collection container. The first magnetic separator 102 includes a first magnetic separator 1021, a first collection container 1022, a first collection platform 1023, a first collection brush 1024, and a first dust suction component 1025. The first magnetic separator 1021 is used to magnetically attract metal debris in the battery electrode. The first collection brush 1024 is used to sweep the metal debris generated by the first magnetic separator 1021 into the first collection platform 1023. The first dust suction component 1025 is used to suck the metal debris on the first collection platform 1023 into the first collection container 1022. The second magnetic separator 103 includes a second magnetic separator 1031, a second collection container 1032, a second collection platform 1033, a second collection brush 1034, and a second dust suction component 1035. The second magnetic separator 1031 is used to magnetically attract metal debris inside the battery electrode. The second collection brush 1034 is used to sweep the metal debris generated by the second magnetic separator 1031 into the second collection platform 1033. The second dust suction component 1035 is used to suck the metal debris on the second collection platform 1033 into the second collection container 1032. The magnetic separation unit 1 further includes a housing 105 and a material conveyor belt 104. The first magnetic separator 102 and the second magnetic separator 103 are located inside the housing 105. The housing 105 has a feed inlet, which is connected to the feeding drive mechanism 1012. The material conveyor belt 104 is located below the first magnetic separator 102 and the second magnetic separator 103 and is used to convey the battery electrode sheets that enter through the feed inlet and pass through the first magnetic separator 102 and the second magnetic separator 103 in sequence for magnetic separation.

[0082] During application, the battery electrodes obtained after battery disassembly and electrode separation enter the vibrating feeder 101 for vibration sorting to remove metal debris. After vibration sorting by the vibrating feeder 101, the battery electrodes fall onto the material conveyor belt 104 through the feed port of the housing 105. At this time, the battery electrodes are still vibrating and pass through the first magnetic separator 102 and the second magnetic separator 103 in sequence under the action of the material conveyor belt 104 to remove any metal debris that has not been completely separated from the battery electrodes. Through one vibration feeding and two magnetic separations, the battery electrodes can effectively separate metal debris, avoiding the problem of metal debris damaging the equipment after entering the shredding unit 2, saving the manual sorting step, ensuring the content of the finished product, and improving work efficiency.

[0083] In some implementations, such as Figure 2 and Figure 4 As shown, the first separation unit 5 includes a first drum screen device 501, a first cyclone separator 502, and a first collection device 503 connected in sequence; the first drum screen device 501 is used to screen the battery powder; the first cyclone separator 502 is used to separate the screened battery powder to obtain battery electrode powder and primary powder; the first collection device 503 is used to collect the battery electrode powder and primary powder respectively. Figure 5 As shown, the first collecting device 503 includes a first electrode powder collecting section 504 and a dust collection section 505. The first electrode powder collecting section 504 and the dust collection section 505 are independently connected to the first cyclone separator 502. The first electrode powder collecting section 504 is used to filter and collect battery electrode powder, and the dust collection section 505 is used to filter and collect primary powder. The dust collection section 505 is connected to the second crushing unit 6. The first electrode powder collecting section 504 includes, from top to bottom, a vibrating filter disc 5041, a filter screen 5042, a primary sorting screen 5053, and a first collecting component 5044. The dust collection section 505 includes, from top to bottom, a primary vibrating filter disc 5051, a primary filter screen 5052, a primary sorting screen, and a second collecting component 5054. The second collecting component 5054 is also provided with an electrostatic adsorption component 5055. The second receiving component 5054 is also provided with at least two staggered guide plates 5056 along the flow direction of the primary powder, which are used to control the flow speed of the primary powder.

[0084] During application, the battery electrode sheets are shredded into fragments by the shredding unit 2, then dried in the drying unit 3, and finally crushed in the first crushing unit 4 to form battery powder. The battery powder is then screened by the first drum screen device 501, and then separated by the first cyclone separator 502 to obtain battery electrode powder and primary powder. The battery electrode powder is then filtered and packaged in the electrode powder collection section, while the primary powder is filtered and collected in the dust collection section 505 before being sent back to the second crushing unit 6 for further crushing.

[0085] Furthermore, to improve the screening efficiency of the first drum screen device 501, the first drum screen device 501 can be equipped with a cleaning mechanism 5011 to quickly and effectively remove powder adhering to the screen, which helps reduce the impurity content of each component in the finished product. Specifically, the cleaning mechanism 5011 can use high-pressure gas jet technology to promptly remove the adhering substances inside the screen mesh of the first drum screen device 501, greatly improving production efficiency.

[0086] In some implementations, such as Figure 2 As shown, the second separation unit 7 includes a second drum screen device 701, a second cyclone separator 702, and a second collection device 703 connected in sequence. The second drum screen device 701 is used to screen the primary powder. The second cyclone separator 702 is used to separate the screened primary powder to obtain battery electrode powder and secondary powder. The second collection device 703 is used to collect the battery electrode powder and secondary powder respectively. The second collection device 703 includes a second electrode powder collection section 704 and a grinding and kneading section 705. The second electrode powder collection section 704 and the grinding and kneading section 705 are independently connected to the second cyclone separator 702. The second electrode powder collection section 704 is used to filter and collect the battery electrode powder, and the grinding and kneading section 705 is used to filter and collect the secondary powder. The grinding and kneading section 705 is connected to the linear sorting unit 8. The second polar powder collection unit 704 includes a two-stage vibrating filter disc, a two-stage filter screen, a two-stage sorting screen 5043 and a first material collection component arranged sequentially from top to bottom. The grinding and kneading unit 705 includes a grinding disc, a secondary filter screen, a secondary sorting screen and a second material collection component arranged sequentially from top to bottom.

[0087] During application, the battery electrode sheets are crushed in multiple stages by the second crushing unit 6 and then enter the second drum screen device 701 for screening. They then enter the second cyclone separator device 702 for cyclone separation to obtain battery electrode powder and secondary powder. The battery electrode powder then enters the electrode powder collection section for filtration and packaging collection, while the secondary powder enters the grinding and kneading section 705 for filtration and collection, and is then sent back to the linear sorting unit 8 for enhanced sorting.

[0088] Furthermore, the structure of the second drum screen device 701 used in the second separation unit 7 is similar to that of the first drum screen device 501, and will not be described again. To improve the screening efficiency of the second drum screen device 701, it can be equipped with a cleaning mechanism 5011 to quickly and effectively remove powder adhering to the screen, which helps reduce the impurity content of each component in the finished product. Specifically, the cleaning mechanism 5011 can use high-pressure gas jet technology to promptly remove the adhering substances inside the screen mesh of the second drum screen device 701, greatly improving production efficiency.

[0089] In some implementations, such as Figure 6 As shown, the linear sorting unit 8 includes a linear sorting frame 801, a support platform 802, a first vibration motor 803, and a second vibration motor 804. The linear sorting frame 801 is connected to the support platform 802 via several first vibration springs. The first vibration motor 803 is connected to the bottom of the linear sorting frame 801 and is used to drive the linear sorting frame 801 to vibrate. A powder screen assembly 8011 is movably disposed inside the linear sorting frame 801. The powder screen assembly 8011 is connected to the linear sorting frame 801 via several second vibration springs. The second vibration motor 804 is connected to the bottom of the powder screen assembly 8011 and is used to drive the powder screen assembly 8011 to vibrate.

[0090] In some embodiments, at least one disc screen unit 9 is further provided between the linear sorting unit 8 and the receiving unit 10. The disc screen unit 9 is used for enhanced screening of secondary powder materials, and the disc screen unit 9 includes at least one disc screen. Preferably, the disc screen unit 9 includes two disc screen devices 901.

[0091] In some embodiments, the battery electrode sorting and recycling system further includes a diaphragm collection unit connected to the linear sorting unit 8.

[0092] During application, the secondary powder separated by the second separation unit 7 contains a small amount of crushed diaphragms. After entering the linear sorting unit 8, the diaphragms in the secondary powder are separated by strong vibration and gravity and then collected in the diaphragm collection unit. The metal powder enters the disc screen unit 9 for final screening, which effectively improves the purity of the metal powder and avoids secondary crushing and separation.

[0093] In some implementations, such as Figure 7As shown, the receiving unit 10 includes a powder conveying device 1001, a storage device 1002, and a metering device 1003. The powder conveying device 1001 is connected to the linear sorting unit 8 and is used to convey the collected metal powder to the storage device 1002. The metering device 1003 is used to meter the storage device 1002 and is also electrically connected to the powder conveying device 1001. There are multiple storage devices 1002. After one storage device 1002 is full of metal powder, another storage device 1002 is used to continue storing. The metering device 1003 includes a metering component, a pressure sensing component, an information receiving component, and an alarm component. The metering component is used to weigh the storage device 1002. The pressure sensing component is electrically connected to the metering component and the information receiving component. The information receiving component is also electrically connected to the alarm component and the powder conveying device 1001.

[0094] During application, a metering component is used to weigh the metal powder in the storage device 1002 in real time. When the metal powder mass reaches a preset threshold, a pressure sensing component is triggered. The pressure sensing component receives the signal and transmits it to an information receiving component. The information receiving component receives the signal and outputs a pause command and an alarm command. The pause command is transmitted to the powder conveying device 1001, causing the powder conveying device 1001 to stop. The alarm command is transmitted to the alarm component to trigger the alarm, reminding staff to check the container load parameters in time and replace the container, thereby ensuring the consistency of the container load.

[0095] In some embodiments, the battery electrode sorting and recycling system further includes a conveyor belt device for transporting battery electrodes sequentially through the magnetic sorting unit 1, the shredding unit 2, the drying unit 3, the first crushing unit 4, the first separation unit 5, the second crushing unit 6, the second separation unit 7, the linear sorting unit 8, and the receiving unit 10.

[0096] In some embodiments, the shredding unit 2 includes a shredding device 201, the drying unit 3 includes a drying device 301, and the first crushing unit 4 and the second crushing unit 6 respectively include a first crushing device 401 and a second crushing device 601. The feed end of the shredding device 201 is connected to the magnetic separation unit 1 via the conveyor belt device, the discharge end of the shredding device 201 is connected to the feed end of the drying device 301 via the conveyor belt device, the discharge end of the drying device 301 is connected to the feed end of the first crushing device 401 via the conveyor belt device, the discharge end of the first crushing device 401 is connected to the first separation unit 5 via the conveyor belt device, and the feed end and discharge end of the second crushing device 601 are respectively connected to the first separation unit 5 and the second separation unit 7 via the conveyor belt device.

[0097] In another specific embodiment, the present invention provides a method for sorting and recycling battery electrodes. This method employs a battery electrode sorting and recycling system provided in a specific embodiment to recycle the battery electrodes. Figure 8 As shown, the battery electrode sorting and recycling method includes:

[0098] The battery electrodes are subjected to magnetic separation, shredding, drying, primary crushing, primary sieving, secondary crushing, secondary sieving, and linear separation in sequence to obtain metal powder, which is then collected.

[0099] This invention first disassembles retired batteries and separates the electrode sheets to obtain battery electrode sheets to be processed. These electrode sheets are then placed in the aforementioned battery electrode sheet sorting and recycling system, which can effectively achieve fine sorting of electrode sheet powder, ensuring sorting efficiency and accuracy, improving the recovery rate of metal powder, and reducing impurities in the product to obtain high-purity metal powder.

[0100] In some embodiments, the battery electrode sorting and recycling method specifically includes:

[0101] S1 uses magnetic separation unit 1 to sequentially perform vibration separation, primary magnetic separation and secondary magnetic separation on the battery electrode sheets to remove metal debris from the battery electrode sheets, and then transports the battery electrode sheets after secondary magnetic separation to shredding unit 2 for shredding to obtain fragmented material.

[0102] S2 transports the fragmented material from step S1 to the drying unit 3 for drying to obtain dried battery electrode sheets. The first crushing unit 4 then crushes the battery electrode sheets once to form battery powder.

[0103] S3 feeds the battery powder from step S2 into the first separation unit 5 for a first drum screening and first cyclone separation to form battery electrode powder and primary powder. The battery electrode powder is then subjected to vibration filtration, first screen filtration and second screen filtration in sequence before being packaged and collected. The primary powder is then subjected to vibration filtration, first screen filtration and second screen filtration in sequence before being collected, thus achieving a first screening. The primary powder is then conveyed to the second crushing unit 6 for secondary crushing.

[0104] S4 feeds the primary powder after secondary crushing in step S3 into the second separation unit 7 for secondary drum screening and second cyclone separation to form battery electrode powder and secondary powder. The battery electrode powder is then subjected to vibration filtration, primary screen filtration and secondary screen filtration in sequence before being packaged and collected. The secondary powder is then subjected to grinding and sorting, filtration and screening and tertiary screen filtration in sequence to achieve secondary screening.

[0105] S5 then feeds the secondary powder from step S4 into the linear sorting unit 8 for enhanced sorting to obtain diaphragm byproducts and metal powder. The diaphragm byproducts are packaged and collected, and the metal powder is screened at least once by a disc sieve and then sent into the receiving unit 10 for collection.

[0106] In some implementations, such as Figure 9 As shown, in step S1, the battery electrode sheets enter the vibrating feeder 101 for vibration sorting, resulting in sorted electrode sheets and metal debris. The metal debris is collected, and the sorted battery electrode sheets enter the first magnetic separator 102 for primary magnetic separation. After primary magnetic separation, the battery electrode sheets enter the second magnetic separator 103 under the action of the material conveyor belt 104 for secondary magnetic separation. The battery electrode sheets after secondary magnetic separation are further shredded, while the metal debris generated by the first and second magnetic separations is collected.

[0107] The vibration sorting frequency is 3-7Hz, the magnetic induction intensity of the primary magnetic sorting is 1000-2000Gs, the magnetic induction intensity of the secondary magnetic sorting is 1500-2500Gs, the transfer rate of the battery electrode sheets in the primary and secondary magnetic sorting is 50-70r / min, and the average particle size of the fragmented material is 2-6cm.

[0108] In some embodiments, the drying temperature in step S2 is 150–250°C.

[0109] In some implementations, in step S3, such as Figure 10 As shown, the battery powder obtained after shredding and primary crushing enters the first drum screen device 501 for primary drum screening, and then enters the first cyclone separator 502 for primary cyclone separation, obtaining battery electrode powder and primary powder respectively. The battery electrode powder is then subjected to vibration filtration, primary screen filtration, and secondary screen filtration before being packaged and collected. The primary powder is subjected to vibration filtration, primary screen filtration, and secondary screen filtration, followed by electrostatic adsorption and collection, thus achieving primary screening. Unqualified products generated during the separation process are sent back to the first drum screen device 501 for reprocessing until the products meet the requirements before being collected.

[0110] The vibration filtration frequency is 100-200Hz, the average particle size of the battery electrode powder after secondary sieve filtration is 60-180μm, and the average particle size of the primary powder after secondary sieve filtration is 80-200μm.

[0111] In step S4, such as Figure 11As shown, the primary powder obtained after one screening and two crushing processes enters the second drum screen device 701 for secondary drum screening, and then enters the second cyclone separator 702 for separation, yielding battery electrode powder and secondary powder. The battery electrode powder undergoes vibration filtration, primary screen filtration, and secondary screen filtration before being packaged and collected. The secondary powder undergoes grinding, sorting, filtration, and tertiary screen filtration before being collected, thus achieving secondary screening. Unqualified products generated during the separation process are sent back to the first drum screen device 501 for reprocessing until the products meet the requirements before being collected. The vibration filtration frequency is 150–250 Hz. The average particle size of the battery electrode powder after secondary screen filtration is 30–150 μm, and the average particle size of the secondary powder after tertiary screen filtration is 50–170 μm.

[0112] In some embodiments, the primary drum screening in step S3 and the secondary drum screening in step S4 further include cleaning the screens of the first drum screen device 501 or the second drum screen device 701 using the cleaning mechanism 5011. During the drum screening of battery powder, the drum screens may become clogged due to prolonged operation, which can easily damage the equipment and reduce work efficiency. Using the equipped cleaning mechanism 5011 for high-pressure purging and cleaning helps improve work efficiency and avoid equipment damage.

[0113] In some implementations, such as Figure 12 As shown, the battery electrode sheets undergo magnetic separation, shredding, primary crushing, primary sieving, secondary crushing, and secondary sieving in sequence. The battery electrode powder obtained from each sieving process is packaged and collected. The metal powder after secondary sieving enters the linear sorting unit 8 for further enhanced sorting to remove and recover any separator by-products contained within the metal powder. The metal powder is then further sieved using a disc screen to obtain the final high-purity metal powder. Furthermore, unqualified products obtained from the primary and secondary sieving processes can be returned to the previous processing step for further processing to ensure the quality of the finished product. The average particle size of the collected metal powder is 2–8 mm.

[0114] In some implementations, such as Figure 13 As shown, this invention uses a powder conveying device 1001 to transport the final metal powder product to a storage device 1002, and a metering device 1003 to measure it. The metering component provides real-time weight measurement of the metal powder in the storage device 1002, and a pressure sensing component detects the weight. When the mass of the metal powder reaches a preset threshold, the pressure sensing component is triggered.

[0115] During application, a metering component is used to weigh the metal powder in the storage device 1002 in real time. When the metal powder mass reaches a preset threshold, a pressure sensing component is triggered. The pressure sensing component receives the signal and transmits it to an information receiving component. The information receiving component receives the signal and outputs an alarm command to trigger the alarm component to issue an alarm. At the same time, the information receiving component outputs a pause command and transmits the pause command to the powder conveying device 1001, causing the start-stop device of the powder conveying device 1001 to shut down. The staff can then check the container load parameters in a timely manner and replace the storage device 1002. After the storage device 1002 is replaced, the powder conveying device 1001 is restarted to transport the metal powder.

[0116] This invention solves the technical problem of metal debris mixed with battery electrodes entering the shredding device 201 and causing equipment damage. It replaces manual sorting with magnetic separation, saving labor costs and significantly improving work efficiency. By performing magnetic and physical separation on the battery electrodes, this invention effectively achieves fine sorting of battery electrode powder, increases the recovery rate of metal materials, reduces the impurity content of the finished product, and improves the purity of the finished product.

[0117] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A battery electrode sorting and recycling system, characterized in that, The battery electrode sorting and recycling system includes a magnetic sorting unit, a shredding unit, a drying unit, a first crushing unit, a first separation unit, a second crushing unit, a second separation unit, a linear sorting unit, and a receiving unit connected in sequence. The magnetic sorting unit is used to magnetically sort the battery electrodes; the shredding unit is used to shred the battery electrodes; the drying unit is used to dry the battery electrodes; the first crushing unit is used to crush the battery electrodes to obtain battery powder; the first separation unit is used to sieve the battery powder to obtain primary powder; the second crushing unit is used to perform secondary crushing on the primary powder; the second separation unit is used to sieve the primary powder after secondary crushing to obtain secondary powder; the linear sorting unit is used to perform enhanced sorting on the secondary powder to obtain metal powder; and the collecting unit is used to collect the metal powder. The first separation unit includes a first drum screen device, a first cyclone separator device, and a first collection device connected in sequence; the first drum screen device is used to screen battery powder; the first cyclone separator device is used to separate the screened battery powder to obtain battery electrode powder and primary powder; the first collection device is used to collect the battery electrode powder and primary powder respectively. The first material collection device includes a first electrode powder collection section and a dust collection section. The first electrode powder collection section and the dust collection section are independently connected to the first cyclone separator. The first electrode powder collection section is used to filter and collect battery electrode powder, and the dust collection section is used to filter and collect primary powder. The dust collection section is connected to the second crushing unit. The first powder collection unit includes a vibrating filter disc, a filter screen, a sorting screen and a first material collection component arranged from top to bottom. The powder collection unit includes a primary vibrating filter disc, a primary filter screen, a primary sorting screen and a second material collection component arranged from top to bottom. The second separation unit includes a second drum screen device, a second cyclone separator device, and a second collection device connected in sequence; the second drum screen device is used to screen the primary powder; the second cyclone separator device is used to separate the screened primary powder to obtain battery electrode powder and secondary powder; the second collection device is used to collect the battery electrode powder and secondary powder respectively. The second collecting device includes a second electrode powder collecting section and a grinding and kneading section. The second electrode powder collecting section and the grinding and kneading section are independently connected to the second cyclone separator. The second electrode powder collecting section is used to filter and collect battery electrode powder, and the grinding and kneading section is used to filter and collect secondary powder. The grinding and kneading section is connected to the linear sorting unit. The second polar powder collection section includes two sections of vibrating filter discs, two sections of filter screens, two sections of sorting screens, and a first material collection component arranged from top to bottom. The grinding and kneading section includes a grinding disc, a secondary filter screen, a secondary sorting screen, and a second material collection component arranged from top to bottom. At least one disc screen unit is also provided between the linear sorting unit and the receiving unit.

2. The battery electrode sorting and recycling system according to claim 1, characterized in that, The magnetic separation unit includes a vibrating feeder, a first magnetic separator, and a second magnetic separator connected in sequence. The vibrating feeding device includes a feeding frame connected to the first magnetic separator. A feeding drive mechanism is provided at the bottom of the feeding frame, and a collection container is provided below the feeding frame. The feeding drive mechanism is used to drive the feeding frame to vibrate, so that the battery electrode sheets enter the first magnetic separator, and the metal debris in the battery electrode sheets falls into the collection container. The first magnetic separator includes a first magnetic separator component, a first collection container, a first collection platform, a first collection brush, and a first dust collection component. The first magnetic separator component is used to magnetically attract metal debris inside the battery electrode. The first collection brush is used to sweep the metal debris generated by the first magnetic separator component into the first collection platform. The first dust collection component is used to suck the metal debris on the first collection platform into the first collection container. The second magnetic separator includes a second magnetic separator component, a second collection container, a second collection platform, a second collection brush, and a second dust collection component. The second magnetic separator component is used to magnetically attract metal debris inside the battery electrode. The second collection brush is used to sweep the metal debris generated by the second magnetic separator component into the second collection platform. The second dust collection component is used to suck the metal debris on the second collection platform into the second collection container. The magnetic separation unit also includes a housing and a material conveyor belt. The first magnetic separator and the second magnetic separator are located inside the housing. The housing has a feed inlet, which is connected to the feeding drive mechanism. The material conveyor belt is located below the first magnetic separator and the second magnetic separator and is used to transport the battery electrode sheets that enter through the feed inlet and pass through the first magnetic separator and the second magnetic separator in sequence for magnetic separation.

3. The battery electrode sorting and recycling system according to claim 1, characterized in that, The second receiving assembly is also provided with an electrostatic adsorption component; at least two staggered guide plates are also provided in the second receiving assembly along the flow direction of the primary powder.

4. The battery electrode sorting and recycling system according to claim 1, characterized in that, The linear sorting unit includes a linear sorting frame, a support platform, a first vibration motor, and a second vibration motor. The linear sorting frame is connected to the support platform through several first vibration springs. The first vibration motor is connected to the bottom of the linear sorting frame and is used to drive the linear sorting frame to vibrate. A powder screen assembly is movably arranged inside the linear sorting frame. The powder screen assembly is connected to the linear sorting frame through several second vibration springs. The second vibration motor is connected to the bottom of the powder screen assembly and is used to drive the powder screen assembly to vibrate. The disc sieve unit is used for enhanced screening of secondary powder materials; The battery electrode sorting and recycling system further includes a diaphragm collection unit, which is connected to the linear sorting unit.

5. The battery electrode sorting and recycling system according to claim 1, characterized in that, The receiving unit includes a powder conveying device, a storage device, and a metering device. The powder conveying device is connected to the linear sorting unit and is used to convey the collected metal powder to the storage device. The metering device is used to measure the storage device and is also electrically connected to the powder conveying device. The metering device includes a metering component, a pressure sensing component, an information receiving component, and an alarm component. The metering component is used to weigh the storage device. The pressure sensing component is electrically connected to the metering component and the information receiving component. The information receiving component is also electrically connected to the alarm component and the powder conveying device.

6. The battery electrode sorting and recycling system according to claim 1, characterized in that, The battery electrode sorting and recycling system also includes a conveyor belt device, which is used to transport battery electrodes sequentially through the magnetic sorting unit, shredding unit, drying unit, first crushing unit, first separation unit, second crushing unit, second separation unit, linear sorting unit and receiving unit. The shredding unit includes a shredding device, the drying unit includes a drying device, and the first crushing unit and the second crushing unit respectively include a first crushing device and a second crushing device; The feed end of the shredding device is connected to the magnetic separation unit via the conveyor belt device, the discharge end of the shredding device is connected to the feed end of the drying device via the conveyor belt device, the discharge end of the drying device is connected to the feed end of the first crushing device via the conveyor belt device, the discharge end of the first crushing device is connected to the first separation unit via the conveyor belt device, and the feed end and discharge end of the second crushing device are respectively connected to the first separation unit and the second separation unit via the conveyor belt device.

7. A method for sorting and recycling battery electrodes, characterized in that, The battery electrode sorting and recycling method uses the battery electrode sorting and recycling system according to any one of claims 1-6 to recycle the battery electrodes, and the battery electrode sorting and recycling method includes: The battery electrodes are subjected to magnetic separation, shredding, drying, primary crushing, primary sieving, secondary crushing, secondary sieving, and linear separation in sequence to obtain metal powder, which is then collected.

8. The battery electrode sorting and recycling method according to claim 7, characterized in that, The battery electrode sorting and recycling method specifically includes: S1 uses a magnetic separation unit to sequentially perform vibration separation, primary magnetic separation and secondary magnetic separation on the battery electrode sheets to remove metal debris from the battery electrode sheets. The battery electrode sheets after secondary magnetic separation are then conveyed to the shredding unit for shredding to obtain fragmented material. S2 transports the fragmented material from step S1 to the drying unit for drying to obtain dried battery electrode sheets. The first crushing unit then crushes the battery electrode sheets once to form battery powder. S3 feeds the battery powder from step S2 into the first separation unit for a first drum sieve and a first cyclone separation to form battery electrode powder and primary powder. The battery electrode powder is then subjected to vibration filtration, a first screen filtration, and a second screen filtration before being packaged and collected. The primary powder is then subjected to vibration filtration, a first screen filtration, and a second screen filtration before being collected, thus achieving a first sieve. The primary powder is then conveyed to the second crushing unit for secondary crushing. S4 feeds the primary powder after secondary crushing in step S3 into the second separation unit for secondary drum screening and second cyclone separation to form battery electrode powder and secondary powder. The battery electrode powder is then subjected to vibration filtration, primary screen filtration and secondary screen filtration in sequence before being packaged and collected. The secondary powder is then subjected to grinding, sorting, filtration and screening in sequence to achieve secondary screening. S5 then feeds the secondary powder from step S4 into the linear sorting unit for enhanced sorting to obtain diaphragm byproducts and metal powder. The diaphragm byproducts are packaged and collected, and the metal powder is screened at least once by a disc sieve and then sent to the receiving unit for collection.

9. The battery electrode sorting and recycling method according to claim 8, characterized in that, In step S1, the frequency of the vibration sorting is 3~7Hz; The magnetic induction intensity of the first magnetic separation is 1000~2000 Gs; The magnetic induction intensity of the secondary magnetic separation is 1500~2500 Gs; The transfer rate of the battery electrode sheets during the primary and secondary magnetic separation is 50~70 r / min; The average particle size of the fragmented material is 2-6 cm; In step S2, the drying temperature is 150~250℃; In step S3, the frequency of the vibration filter is 100~200Hz; The average particle size of the battery electrode powder after secondary sieve filtration is 60~180μm; The average particle size of the primary powder after secondary sieve filtration is 80~200μm; In step S4, the frequency of the vibration filter is 150~250Hz; The average particle size of the battery electrode powder after secondary sieve filtration is 30~150μm; The average particle size of the secondary powder after filtration through the aforementioned sieve is 50~170μm; In step S5, the average particle size of the collected metal powder is 2~8mm.

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