Deep separation equipment for copper-aluminum foil and positive and negative electrode powder of lithium battery

Abstract

The invention discloses lithium battery copper aluminum foil and positive and negative electrode powder deep separation equipment, and relates to the technical field of lithium battery recycling, the lithium battery copper aluminum foil and positive and negative electrode powder deep separation equipment comprises a first conveying belt and a supporting plate, a separation unit comprises a separation chamber, the outer wall of the separation chamber is fixedly connected with an air conveying pump, and the top of the separation chamber is detachably communicated with a conveying pipe; a second motor is arranged on the outer wall of the separation chamber; by arranging the separation unit and the transportation unit, stripping of positive and negative electrode powder on copper aluminum foil is achieved, the separation unit can efficiently separate residual loose powder still attached after pre-rubbing through adjustable airflow, the amount of powder entering the fine screening unit is greatly reduced, screen blockage caused by excessive powder is avoided, the overall production line efficiency is improved, and the production cost is reduced. And meanwhile, the conveying unit can seal the communicating position of the separating unit and the pre-rubbing unit in a staged mode, so that the situation that powder flows back when the powder is collected by airflow is avoided, and the situation that the powder collecting efficiency is affected is avoided.

Description

Technical Field

[0001] This invention relates to the field of lithium battery recycling technology, and in particular to a device for deep separation of copper and aluminum foil and positive and negative electrode powder from lithium batteries. Background Technology

[0002] With the rapid development of industries such as new energy vehicles and consumer electronics, the market share of lithium batteries continues to rise, leading to an increasingly urgent need for the recycling and disposal of waste lithium batteries. As core components of lithium batteries, the positive and negative electrode sheets contain a large amount of valuable resources such as nickel, cobalt, lithium, copper, and aluminum in their copper and aluminum foil and powder. Efficiently separating and recycling these resources can not only alleviate the pressure of mineral resource shortages but also reduce environmental pollution risks, demonstrating significant economic and environmental value. In the recycling of waste lithium batteries, the purity of the copper-aluminum foil separated from the positive and negative electrode powders directly determines the resource recycling value. Existing separation technologies have significant drawbacks: First, the separation process is loose, and the insufficient processing capacity of each stage leads to incomplete separation. The lack of pretreatment means that a single kneading can only remove the surface powder, and the deep-layer bonded powder has a high residual rate due to the binder effect; the specific gravity separation parameters are fixed and it is difficult to adapt to different material characteristics (such as metal foil shape and powder density), which easily leads to metal loss or incomplete separation; the screening is disconnected from the previous stage and cannot match the residual powder particle size characteristics, so there is still a lot of powder residue on the surface of the metal foil, and the positive and negative electrode powders are also easy to mix with metal shavings, forming cross-contamination. Secondly, the open material conveying path leads to significant losses and contamination. Open conveying or manual transfer results in dust loss of positive and negative electrode powder, and thin metal foil may also be lost with the dust; external impurities are easily mixed into the material, and sharing equipment with different batches of materials can also cause cross-contamination and reduce product purity; Third, the powder collection lacks a classification design, resulting in low resource utilization. The existing system collects positive and negative electrode powders together, requiring an additional separation process later. This not only increases costs and energy consumption but also causes secondary powder loss, reducing the economic benefits of recycling. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and propose a deep separation device for copper-aluminum foil and positive and negative electrode powder in lithium batteries, including a first conveyor belt and a support plate, wherein a pre-kneading unit is provided on the top of the first conveyor belt; and a separation unit is provided above the support plate. A conveying unit is provided above the support plate; a screening unit is provided above the support plate. A collection unit is provided above the support plate; a transportation unit is provided above the support plate. The separation unit includes a separation chamber, an air pump is fixedly connected to the outer wall of the separation chamber, a conveying pipe is detachably connected to the top of the separation chamber, a second motor is installed on the outer wall of the separation chamber, and a second conveyor belt is installed inside the separation chamber. The transport unit includes a third sprocket fixedly connected to the shaft of a second motor, a second chain meshing with the outside of the third sprocket, a fifth sprocket rotatably connected to the outer wall of the separation chamber, a fourth sprocket fixedly connected to the fifth sprocket, the fourth sprocket meshing with the second chain, a third chain meshing with the outer wall of the fifth sprocket, a sixth sprocket rotatably connected to the outer wall of the separation chamber, the outer wall of the sixth sprocket meshing with the third chain, a rack provided on the outer wall of the third chain, a first gear rotatably connected to the outer wall of the separation chamber, a partition plate fixedly connected to one end of the first gear penetrating the interior of the separation chamber, a second gear rotatably connected to the exterior of the separation chamber, and a tilting plate fixedly connected to one end of the second gear penetrating the separation chamber.

[0004] Preferably, the conveying pipe is fixedly connected to a collection frame at one end of the separation chamber, and a baffle is fixedly connected to the inner top wall of the separation chamber. By setting the collection frame and the baffle, the positive and negative electrode powders can be collected quickly. The baffle can expand the collection range of the conveying pipe, so that the powder collection is faster and the collection effect is better. At the same time, the baffle can flatten the copper and aluminum foil, so as to facilitate powder collection.

[0005] Preferably, a round rod is fixedly connected to the end of the rack away from the third chain. The round rod is slidably connected to the separation chamber. A ball is provided at the end of the round rod near the separation chamber. By setting the round rod, the rack is limited, preventing the rack from shaking when sliding, thereby avoiding affecting the rack's drive of the first gear and the second gear.

[0006] Preferably, the pre-kneading unit includes a kneading chamber and a protrusion. One end of the kneading chamber is connected to the top of the first conveyor belt, and the end of the kneading chamber away from the first conveyor belt is connected to one end of the separation chamber. A first motor is fixedly connected to the outer wall of the kneading chamber, and a first sprocket is fixedly connected to the outer wall of the first motor shaft. A first chain is provided on the outer wall of the first sprocket. A first kneading rod is fixedly connected to the end of the first sprocket that passes through the kneading chamber. A first spring telescopic rod is fixedly connected to the inside of the kneading chamber, and a first filter plate is fixedly connected to the top of the first spring telescopic rod. By setting the pre-kneading unit, the positive and negative electrode powders on the copper and aluminum foil can be peeled off. Through high-frequency light kneading, the bonding interface between the deep bonding powder and the metal foil can be destroyed, making subsequent separation easier, thereby efficiently peeling off the surface and some deep powders.

[0007] Preferably, a connecting block is fixedly connected to the rotating rod on the first kneading rod, a rubber block is fixedly connected to the connecting block, and a kneading block is fixedly connected to the rubber block. The kneading block and the connecting block are slidably connected. By setting the connecting block, the rubber block and the kneading block, the material form can be adapted to achieve efficient powder removal without damaging the metal foil. The elastic setting can conform to the curled and wrinkled shape of the copper and aluminum foil, thereby peeling off the loose powder on the surface and breaking the bonding interface of the deep binding powder, laying the groundwork for subsequent separation, while reducing mechanical damage to the copper and aluminum foil and ensuring the integrity of the material in subsequent processing.

[0008] Preferably, a reciprocating ring is slidably connected to the outer wall of the kneading chamber. The inner wall of the reciprocating ring is in contact with the outer wall of the protrusion. A drive bar is fixedly connected to the bottom of the reciprocating ring. A striking rod is fixedly connected to the bottom of the drive bar. A magnetic frame is fixedly connected to the outer wall of the kneading chamber. A limit strip is slidably connected to the inner wall of the magnetic frame. The bottom of the limit strip is fixedly connected to the striking rod. A sealing strip is fixedly connected to the striking rod. By setting the protrusion, reciprocating ring, drive bar, striking rod, limit strip, magnetic frame, and sealing strip, the first filter plate is shaken. This shakes and breaks up agglomerated powder, preventing it from clogging the screen apertures and preventing powder from accumulating in the screen pores. This avoids powder accumulation in the chamber due to blockage. At the same time, the inertial force generated by the shaking helps the powder pass through the screen quickly, improving the powder separation efficiency of a single kneading.

[0009] Preferably, the conveying unit includes a conveying chamber fixedly connected to the bottom of the separation chamber. A third motor is fixedly connected to the outer wall of the conveying chamber, and a spiral conveying blade is fixedly connected to the shaft of the third motor. By setting up the conveying unit, the metal foil is conveyed, thereby avoiding dust overflow during the conveying of the metal foil, preventing the mixing of external impurities, reducing cross-contamination, and preventing the thin copper and aluminum foil from tearing or breaking, ensuring the integrity of the metal foil. At the same time, the slight friction between the spiral blade and the metal foil when rotating can also peel off a small amount of loose powder on the surface, thereby accelerating the collection of positive and negative electrode powder.

[0010] Preferably, the screening unit includes a screening chamber fixedly connected to the top of the support plate. The top of the screening chamber is fixedly connected to the bottom of the conveying chamber. A second spring telescopic rod is fixedly connected to the inner wall of the screening chamber. A second filter plate is fixedly connected to the top of the second spring telescopic rod. A third filter plate is fixedly connected to the top of the second filter plate. A vibration motor is detachably connected to the bottom of the second filter plate. By setting up the screening unit, the powder on the surface of the copper and aluminum foil can be further removed, thereby meeting the high-purity recovery requirements. This ensures that the powder on the metal foil is completely removed and the product purity meets the standards.

[0011] Preferably, the collection unit includes a positive and negative electrode separator detachably connected to the top of the support plate. One end of the positive and negative electrode separator is fixedly connected to a powder collection pipe. The outer wall of the powder collection pipe is fixedly connected to a first collection pipe. The top of the first collection pipe is fixedly connected to the bottom of the kneading chamber. The bottom of the conveying pipe is fixedly connected to an air outlet. The bottom of the air outlet is fixedly connected to a second collection pipe. The bottom of the second collection pipe is fixedly connected to the powder collection pipe. The outer wall of the screening chamber is detachably connected to a third collection pipe. The bottom of the third collection pipe is fixedly connected to the outer wall of the powder collection pipe. The end of the positive and negative electrode separator away from the powder collection pipe is fixedly connected to a connecting pipe. The end of the connecting pipe away from the positive and negative electrode separator is fixedly connected to a positive and negative electrode powder classification bin. By setting up the collection unit, the positive and negative electrode powders are collected and classified, thereby avoiding mixing of positive and negative electrode powders and reducing the mixing of metal shavings and external impurities. This ensures that the purity of both positive and negative electrode powders meets the requirements for regeneration and reuse, eliminating the need for secondary purification and improving the economic benefits of recycling.

[0012] In summary, this invention provides a device for deep separation of copper-aluminum foil and positive and negative electrode powders in lithium batteries, which has the following beneficial effects: 1. By setting up a separation unit and a transport unit, the positive and negative electrode powders on the copper and aluminum foil can be peeled off. The separation unit can efficiently separate the residual loose powder still attached after pre-kneading through adjustable airflow, which greatly reduces the amount of powder entering the fine screening unit and avoids screen blockage caused by excessive powder, thereby improving the overall production line efficiency. At the same time, the transport unit can seal the connection between the separation unit and the pre-kneading unit in stages to prevent powder backflow when the airflow collects the powder, thereby avoiding affecting the powder collection efficiency.

[0013] 2. By setting up a pre-kneading unit, the positive and negative electrode powders on the copper and aluminum foil can be peeled off. Through high-frequency light kneading, the bonding interface between the deep-layer adhesive powder and the metal foil can be broken, making subsequent separation easier. This efficiently peels off the surface layer and some deep-layer powder. At the same time, the powder peeled off in advance is quickly separated by the first filter plate, avoiding a large amount of powder rubbing against the equipment parts with the metal foil in subsequent units, reducing the wear of the equipment and extending its service life.

[0014] 3. By setting up a screening unit, the powder on the surface of copper and aluminum foil can be further removed to meet the requirements of high-purity recovery. This ensures that the powder on the metal foil is completely removed and the product purity meets the standards. At the same time, copper and aluminum foils of different shapes, such as curled and flat, can move back and forth on the screen surface without screening blind spots, ensuring that each piece of metal foil can be fully de-powdered.

[0015] 4. By setting up a collection unit, the positive and negative electrode powders can be collected and classified, thereby avoiding mixing of positive and negative electrode powders and reducing the mixing of metal shavings and external impurities. This ensures that the purity of both positive and negative electrode powders meets the requirements for regeneration and reuse, eliminating the need for secondary purification and improving the economic benefits of recycling. At the same time, different compartments store positive and negative electrode powders independently, and there are no open areas inside the equipment, preventing the mixing of different batches of materials and external impurities. This ensures the purity and stability of each batch of powder and avoids the waste of powder due to contamination. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front structure of a lithium battery copper-aluminum foil and positive and negative electrode powder deep separation device according to the present invention; Figure 2 This is a schematic diagram of the overall back and related parts structure of a lithium battery copper-aluminum foil and positive and negative electrode powder deep separation device according to the present invention; Figure 3 This is a schematic diagram of the kneading chamber and related parts of a deep separation device for copper and aluminum foil and positive and negative electrode powder in lithium batteries according to the present invention; Figure 4 This is a schematic diagram of the striking rod and related parts of a deep separation device for copper and aluminum foil and positive and negative electrode powder in lithium batteries according to the present invention. Figure 5 This is a schematic diagram of the striking rod and related parts of a deep separation device for copper and aluminum foil and positive and negative electrode powder in lithium batteries according to the present invention. Figure 6 This is a schematic diagram of the rack and related parts of a deep separation device for copper-aluminum foil and positive and negative electrode powder in lithium batteries according to the present invention; Figure 7 This is a schematic diagram of the rack and related parts of a deep separation device for copper-aluminum foil and positive and negative electrode powder in lithium batteries according to the present invention; Figure 8 This is a schematic diagram of the rack and related parts of a deep separation device for copper-aluminum foil and positive and negative electrode powder in lithium batteries according to the present invention; Figure 9 This is a schematic diagram of the positive and negative electrode separator and related parts of a lithium battery copper and aluminum foil and positive and negative electrode powder deep separation equipment according to the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. First conveyor belt; 2. Pre-kneading unit; 201. Kneading chamber; 202. First motor; 203. First sprocket; 204. First chain; 205. First kneading rod; 206. First filter plate; 207. First spring telescopic rod; 208. Connecting block; 209. Rubber block; 210. Kneading block; 211. Protrusion; 212. Reciprocating ring; 213. Drive bar; 214. Striking rod; 215. Limiting bar; 216. Magnetic frame; 217. Sealing strip; 3. Separation unit; 301. Separation chamber; 302. Air pump; 303. Conveying pipe; 304. Collection frame; 305. Second motor; 306. Second conveyor belt; 307. Baffle; 4. Conveying unit; 401. Conveying chamber; 402. Third motor; 403. Screw conveyor blades; 5. Screening unit; 501. Screening chamber; 502. Second spring telescopic rod; 503. Vibrating motor; 504. Second filter plate; 505. Third filter plate; 6. Collection unit; 601. Positive and negative electrode separator; 602. Powder collection pipe; 603. First collection pipe; 604. Second collection pipe; 605. Air outlet duct; 606. Third collection pipe; 607. Connecting pipe; 608. Positive and negative electrode powder sorting bin; 7. Transport unit; 701. Third sprocket; 702. Second chain; 703. Fourth sprocket; 704. Fifth sprocket; 705. Third chain; 706. Sixth sprocket; 707. Rack; 708. First gear; 709. Divider plate; 710. Second gear; 711. Tilting plate; 712. Round rod; 8. Support plate. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the present invention provides a technical solution: a deep separation device for lithium battery copper-aluminum foil and positive and negative electrode powder, including a first conveyor belt 1 and a support plate 8. A pre-kneading unit 2 is provided at the top of the first conveyor belt 1; the pre-kneading unit 2 can pre-treat the metal foil and powder. A separation unit 3 is located above the support plate 8; the separation unit 3 can further separate the metal foil and powder. A conveying unit 4 is located above the support plate 8; the conveying unit 4 can transport the metal foil and powder. A sieving unit 5 is located above the support plate 8; the sieving unit 5 can perform a final separation of the metal foil and powder. A sieve unit is located above the support plate 8. Collection unit 6; Collection unit 6 can collect and separate positive and negative electrode powders. A transport unit 7 is provided above the support plate 8; Transport unit 7 can transport metal foil. Separation unit 3 includes a separation chamber 301, which can seal the metal foil and powder. An air pump 302 is fixedly connected to the outer wall of the separation chamber 301, which provides airflow. A conveying pipe 303 is detachably connected to the top of the separation chamber 301, which can collect powder. A second motor 305 is provided on the outer wall of the separation chamber 301, and a second conveyor belt 306 is provided inside the separation chamber 301.The second motor 305 drives the second conveyor belt 306, which transports metal foil and powder. The transport unit 7 includes a third sprocket 701 fixedly connected to the shaft of the second motor 305. The second motor 305 drives the third sprocket 701. A second chain 702 is meshed with the outer side of the third sprocket 701. A fifth sprocket 704 is rotatably connected to the outer wall of the separation chamber 301. A fourth sprocket 703 is fixedly connected to the fifth sprocket 704. The third sprocket 701 can drive the fourth sprocket 703 via the second chain 702, and the fourth sprocket 703 can drive the fifth sprocket 704. The fourth sprocket 703 is meshed with the second chain 702. A third chain 705 is meshed with the outer wall of the fifth sprocket 704. A sixth sprocket 706 is rotatably connected to the outer wall of the separation chamber 301. The fifth sprocket 704 can be driven by the third chain 702. 5. A sixth sprocket 706 is driven. The outer wall of the sixth sprocket 706 meshes with the third chain 705. The outer wall of the third chain 705 is provided with a rack 707. The rotation of the third chain 705 causes the rack 707 to rotate. A first gear 708 is rotatably connected to the outer wall of the separation chamber 301. The rack 707 causes the first gear 708 to rotate half a turn. A magnet is provided on the first gear 708. A partition plate 709 is fixedly connected to one end of the first gear 708 that penetrates the interior of the separation chamber 301. The rotation of the first gear 708 causes the partition plate 709 to rotate half a turn. A second gear 710 is rotatably connected to the outside of the separation chamber 301. The rack 707 causes the second gear 710 to rotate half a turn. A magnet is provided on the second gear 710. A flip plate 711 is fixedly connected to one end of the second gear 710 that penetrates the separation chamber 301. The second gear 710 causes the flip plate 711 to rotate half a turn.

[0020] like Figure 1 and Figure 5 As shown, a collection frame 304 is fixedly connected to one end of the conveying pipe 303 located in the separation chamber 301. The collection frame 304 can expand the collection range of the conveying pipe 303, so that the powder collection is faster and the collection effect is better. A baffle 307 is fixedly connected to the inner top wall of the separation chamber 301. The baffle 307 can flatten the copper and aluminum foil, so as to facilitate powder collection.

[0021] like Figure 5 and Figure 6 As shown, a round rod 712 is fixedly connected to the end of the rack 707 away from the third chain 705. The round rod 712 is slidably connected to the separation chamber 301. The round rod 712 can limit the rack 707 to prevent it from shaking when it shakes, thereby avoiding affecting the drive of the rack 707 to the first gear 708 and the second gear 710. A ball is provided at the end of the round rod 712 near the separation chamber 301. The ball can prevent the round rod 712 from shaking when it shakes.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the pre-kneading unit 2 includes a kneading chamber 201 and a protrusion 211. One end of the kneading chamber 201 is connected to the top of the first conveyor belt 1, and the kneading chamber 201 can store metal foil. The end of the kneading chamber 201 away from the first conveyor belt 1 is connected to one end of the separation chamber 301. A first motor 202 is fixedly connected to the outer wall of the kneading chamber 201, and the first motor 202 can drive the components. A first sprocket 203 is fixedly connected to the outer wall of the shaft of the first motor 202. There are three first sprockets 203. A first chain 204 is provided on the outer wall of the first sprocket 203, and the first chain 204 can connect multiple first sprockets 203 together, so that the first sprockets 203 can achieve synchronous transmission. A first kneading rod 205 is fixedly connected to one end of the first sprocket 203 that passes through the kneading chamber 201. Each first sprocket 203 is provided with a first kneading rod 205. The first kneading rod 205 can knead the metal foil, thereby allowing the powder on the metal foil to be quickly removed. A first spring telescopic rod 207 is fixedly connected inside the kneading chamber 201. Multiple first spring telescopic rods 207 are provided, and a first filter plate 206 is fixedly connected to the top of each first spring telescopic rod 207. The first spring telescopic rods 207 can cause the first filter plate 206 to shake up and down, allowing the first filter plate 206 to peel off the positive and negative electrode powders from the copper and aluminum foil. This high-frequency, light kneading can break down the bonding interface between the deep-layer adhesive powder and the metal foil, making subsequent separation easier. This efficiently peels off the surface and some deep-layer powder. Simultaneously, the pre-peeled powder is quickly separated by the first filter plate 206, preventing a large amount of powder from rubbing against equipment parts with the metal foil in subsequent units, reducing wear on the equipment, and extending its service life.

[0023] like Figure 3 and Figure 4 As shown, a connecting block 208 is fixedly connected to a rotating rod on the first kneading rod 205. The first kneading rod 205 is provided with multiple long rods. A rubber block 209 is fixedly connected to the connecting block 208. The connecting block 208 can fix the rubber block 209. A kneading block 210 is fixedly connected to the rubber block 209. The kneading block 210 is configured with two parts: one part is a hard block and the other part is a soft pad. The kneading block 210 is slidably connected to the connecting block 208. The use of the kneading block 210 can adapt to the material form, efficiently remove powder without damaging the metal foil. The elastic setting can conform to the curled and wrinkled shape of the copper and aluminum foil, thereby peeling off the loose powder on the surface and destroying the bonding interface of the deep adhesive powder, laying the foundation for subsequent separation. At the same time, it reduces mechanical damage to the copper and aluminum foil and ensures the integrity of the material in subsequent processing.

[0024] like Figure 3 and Figure 4 As shown, a reciprocating ring 212 is slidably connected to the outer wall of the kneading chamber 201. The rotation of the protrusion 211 enables the reciprocating ring 212 to slide up and down. The inner wall of the reciprocating ring 212 is in contact with the outer wall of the protrusion 211. A drive bar 213 is fixedly connected to the bottom of the reciprocating ring 212. The up and down sliding of the drive bar 213 enables the up and down sliding of the striking rod 214. The up and down sliding of the striking rod 214 enables the first filter plate 206 to vibrate. This vibration breaks up agglomerated powder, preventing it from clogging the screen apertures and preventing powder from accumulating in the screen gaps. This also prevents powder from accumulating in the chamber due to blockage. At the same time, the inertial force generated by the vibration helps the powder to pass through the screen quickly, improving the powder separation efficiency of a single kneading. The protrusion 211... The drive bar 213 can slide up and down. The bottom of the drive bar 213 is fixedly connected to a striking rod 214. The striking rod 214 is divided into two parts: a longer rod and several shorter rods. A magnetic frame 216 is fixedly connected to the outer wall of the kneading chamber 201. A limit strip 215 is slidably connected to the inner wall of the magnetic frame 216. The magnetic frame 216 can limit the limit strip 215. The bottom of the limit strip 215 is fixedly connected to the striking rod 214. The limit strip 215 can limit the striking rod 214 and prevent the striking rod 214 from shaking during use. A sealing strip 217 is fixedly connected to the striking rod 214. The sealing strip 217 can seal the sliding connection between the striking rod 214 and the kneading chamber 201.

[0025] like Figure 5 , Figure 6 and Figure 7 As shown, the conveying unit 4 includes a conveying chamber 401 fixedly connected to the bottom of the separation chamber 301. The conveying chamber 401 can be sealed during the metal foil transfer to prevent the metal foil from contacting the outside. A third motor 402 is fixedly connected to the outer wall of the conveying chamber 401. The rotating shaft of the third motor 402 is fixedly connected to a spiral conveying blade 403. The third motor 402 can realize the rotation of the spiral conveying blade 403, thereby transferring the metal foil through the rotation of the spiral conveying blade 403. This prevents dust from overflowing during the metal foil transfer, prevents external impurities from mixing in, reduces cross-contamination, and prevents the thin copper and aluminum foil from tearing or breaking, ensuring the integrity of the metal foil. At the same time, the slight friction between the spiral blade and the metal foil during rotation can also peel off a small amount of loose powder on the surface, thereby accelerating the collection of positive and negative electrode powder.

[0026] like Figure 1 and Figure 8As shown, the screening unit 5 includes a screening chamber 501 fixedly connected to the top of the support plate 8. The top of the screening chamber 501 is fixedly connected to the bottom of the conveying chamber 401. The connection between the screening chamber 501 and the conveying chamber 401 allows for collection within the screening chamber 501. A second spring telescopic rod 502 is fixedly connected to the inner wall of the screening chamber 501. A second filter plate 504 is fixedly connected to the top of the second spring telescopic rod 502. The second spring telescopic rod 502 supports the second filter plate 504, allowing the second filter plate 504 to be aligned with the screen. The negative electrode powder is filtered to achieve high-purity collection of both positive and negative electrode powders. A third filter plate 505 is fixedly connected to the top of the second filter plate 504. The third filter plate 505 can filter the metal foil. A vibration motor 503 is detachably connected to the bottom of the second filter plate 504. The vibration motor 503 can make the second filter plate 504 and the third filter plate 505 vibrate, so that copper and aluminum foils of different shapes, such as curled and flat, can move back and forth on the screen surface without screening blind spots, ensuring that each metal foil can be fully de-powdered.

[0027] like Figure 1 , Figure 8 and Figure 9As shown, the collection unit 6 includes a positive and negative electrode separator 601 detachably connected to the top of the support plate 8. The positive and negative electrode separator 601 is equipped with a negative pressure powder suction module. The positive and negative electrode separator 601 can classify positive and negative electrode powders. One end of the positive and negative electrode separator 601 is fixedly connected to a powder collection pipe 602, which can collect the positive and negative electrode powders. The outer wall of the powder collection pipe 602 is fixedly connected to a first collection pipe 603, which can collect and transport the positive and negative electrode powders separated from the pre-kneading unit 2. The top of the first collection pipe 603 is fixedly connected to the bottom end of the kneading chamber 201. The bottom end of the conveying pipe 303 is fixedly connected to an air outlet 605, which can release airflow to facilitate powder collection. The bottom end of the air outlet 605 is fixedly connected to a second collection pipe 604, which can collect the powders separated from the separation unit. The detached powder is collected. The bottom end of the second collection pipe 604 is fixedly connected to the powder collection pipe 602. The outer wall of the screening chamber 501 is detachably connected to the third collection pipe 606, which can collect the powder detached from the screening unit 5. The bottom end of the third collection pipe 606 is fixedly connected to the outer wall of the powder collection pipe 602. The positive and negative electrode separator 601 is fixedly connected to the end away from the powder collection pipe 602 by the connecting pipe 607, which can transport the classified positive and negative electrode powder. The end of the connecting pipe 607 away from the positive and negative electrode separator 601 is fixedly connected to the positive and negative electrode powder classification bin 608, which can collect the positive and negative electrode powder for independent storage. The equipment has no open areas to prevent different batches of materials and external impurities from mixing in, ensuring the purity and stability of each batch of powder and avoiding powder waste due to contamination.

[0028] Working principle: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, this lithium battery copper-aluminum foil and positive / negative electrode powder deep separation device, in use, transports the metal foil and powder via a first conveyor belt 1. The metal foil and powder fall into the pre-kneading unit 2 as they are transported by the first conveyor belt 1. The first motor 202 is then activated, driving the first sprocket 203. The drive of the first sprocket 203, in turn, drives two other first sprockets 203 via a first chain 204. The drive of the first sprockets 203 then drives the first kneading rod. Driven by 205, the first kneading rod 205 kneads and transports the metal foil. When the first kneading rod 205 kneads, the powder falls through the first filter plate 206, which facilitates the collection of the powder. At the same time, the first sprocket 203 drives the reciprocating ring 212 to move up and down through the protrusion 211. The up and down movement of the reciprocating ring 212 drives the drive bar 213 and the striking rod 214 to move up and down. The striking rod 214 shakes the first filter plate 206, which facilitates the falling of the powder. The pre-kneaded metal foil and powder fall into the separation chamber 301 via a conveyor. The second motor 305 is activated, driving the third sprocket 701 to rotate. The rotation of the third sprocket 701 drives the fourth sprocket 703 via the second chain 702. The rotation of the fourth sprocket 703 drives the fifth sprocket 704 to rotate. The rotation of the fifth sprocket 704 drives the sixth sprocket 706 via the third chain 705. The movement of the third chain 705 moves the rack 707, and the sixth sprocket... The movement of 706 will drive the first gear 708 and the second gear 710 in sequence. The sequential driving of the first gear 708 and the second gear 710 will cause the flip plate 711 and the separator plate 709 to flip in sequence, thereby realizing the transmission of metal foil. At the same time, the second motor 305 will also drive the second conveyor belt 306 to transmit metal foil. Meanwhile, the air pump 302 will transmit airflow into the separation chamber 301 to facilitate the separation of metal foil and powder, and then collect the powder through the conveying pipe 303. The powder conveyed by the second conveyor belt 306 will fall into the conveying chamber 401, and then fall into the screening chamber 501 through the third motor 402 and the spiral conveying blades 403. The metal foil and powder falling into the screening chamber 501 will be filtered by the second filter plate 504 and the third filter plate 505, leaving the powder and conveying the remaining metal foil out. The powder falls into the powder collection pipe 602 through the first collection pipe 603, the second collection pipe 604 and the third collection pipe 606, and then falls into the positive and negative electrode powder classification bin 608 through the connecting pipe 607 after being classified by the positive and negative electrode separator 601, thereby realizing the collection and classification of powder.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A deep separation device for copper-aluminum foil and positive and negative electrode powders in lithium batteries, comprising a first conveyor belt (1) and a support plate (8), characterized in that: The top of the first conveyor belt (1) is provided with a pre-kneading unit (2); the upper part of the support plate (8) is a separation unit (3); A conveying unit (4) is provided above the support plate (8); a screening unit (5) is provided above the support plate (8). A collection unit (6) is provided above the support plate (8); a transport unit (7) is provided above the support plate (8). The separation unit (3) includes a separation chamber (301), an air pump (302) is fixedly connected to the outer wall of the separation chamber (301), a conveying pipe (303) is detachably connected to the top of the separation chamber (301), a second motor (305) is provided on the outer wall of the separation chamber (301), and a second conveyor belt (306) is provided inside the separation chamber (301). The transport unit (7) includes a third sprocket (701) fixedly connected to the shaft of a second motor (305), a second chain (702) meshing with the outside of the third sprocket (701), a fifth sprocket (704) rotatably connected to the outer wall of the separation chamber (301), a fourth sprocket (703) fixedly connected to the fifth sprocket (704), the fourth sprocket (703) meshing with the second chain (702), a third chain (705) meshing with the outer wall of the fifth sprocket (704), and a third chain (705) rotatably connected to the outer wall of the separation chamber (301). A sixth sprocket (706) is provided. The outer wall of the sixth sprocket (706) is meshed with the third chain (705). The outer wall of the third chain (705) is provided with a rack (707). The outer wall of the separation chamber (301) is rotatably connected to a first gear (708). One end of the first gear (708) that penetrates the interior of the separation chamber (301) is fixedly connected to a partition plate (709). The outside of the separation chamber (301) is rotatably connected to a second gear (710). One end of the second gear (710) that penetrates the separation chamber (301) is fixedly connected to a flip plate (711).

2. The lithium battery copper-aluminum foil and positive and negative electrode powder deep separation equipment according to claim 1, characterized in that: The conveying pipe (303) is fixedly connected to a collection frame (304) at one end of the separation chamber (301), and a baffle (307) is fixedly connected to the inner top wall of the separation chamber (301).

3. The lithium battery copper-aluminum foil and positive and negative electrode powder deep separation equipment according to claim 1, characterized in that: A round rod (712) is fixedly connected to one end of the rack (707) away from the third chain (705). The round rod (712) is slidably connected to the separation chamber (301). A ball is provided at one end of the round rod (712) near the separation chamber (301).

4. The lithium battery copper-aluminum foil and positive and negative electrode powder deep separation equipment according to claim 1, characterized in that: The pre-kneading unit (2) includes a kneading chamber (201) and a protrusion (211). One end of the kneading chamber (201) is connected to the top of the first conveyor belt (1), and the end of the kneading chamber (201) away from the first conveyor belt (1) is connected to the end of the separation chamber (301). A first motor (202) is fixedly connected to the outer wall of the kneading chamber (201). A first sprocket (203) is fixedly connected to the outer wall of the shaft of the first motor (202). A first chain (204) is provided on the outer wall of the first sprocket (203). A first kneading rod (205) is fixedly connected to one end of the first sprocket (203) that passes through the kneading chamber (201). A first spring telescopic rod (207) is fixedly connected inside the kneading chamber (201). A first filter plate (206) is fixedly connected to the top of the first spring telescopic rod (207).

5. The lithium battery copper-aluminum foil and positive and negative electrode powder deep separation equipment according to claim 4, characterized in that: A connecting block (208) is fixedly connected to a rotating rod on the first kneading rod (205). A rubber block (209) is fixedly connected to the connecting block (208). A kneading block (210) is fixedly connected to the rubber block (209). The kneading block (210) is slidably connected to the connecting block (208).

6. The lithium battery copper-aluminum foil and positive and negative electrode powder deep separation equipment according to claim 4, characterized in that: A reciprocating ring (212) is slidably connected to the outer wall of the kneading chamber (201). The inner wall of the reciprocating ring (212) is in contact with the outer wall of the protrusion (211). A drive bar (213) is fixedly connected to the bottom of the reciprocating ring (212). A striking rod (214) is fixedly connected to the bottom of the drive bar (213). A magnetic frame (216) is fixedly connected to the outer wall of the kneading chamber (201). A limit bar (215) is slidably connected to the inner wall of the magnetic frame (216). The bottom of the limit bar (215) is fixedly connected to the striking rod (214). A sealing strip (217) is fixedly connected to the striking rod (214).

7. The lithium battery copper-aluminum foil and positive and negative electrode powder deep separation equipment according to claim 1, characterized in that: The conveying unit (4) includes a conveying chamber (401) fixedly connected to the bottom of the separation chamber (301). A third motor (402) is fixedly connected to the outer wall of the conveying chamber (401), and a spiral conveying blade (403) is fixedly connected to the shaft of the third motor (402).

8. The lithium battery copper-aluminum foil and positive and negative electrode powder deep separation equipment according to claim 1, characterized in that: The screening unit (5) includes a screening chamber (501) fixedly connected to the top of the support plate (8). The top of the screening chamber (501) is fixedly connected to the bottom of the conveying chamber (401). A second spring telescopic rod (502) is fixedly connected to the inner wall of the screening chamber (501). A second filter plate (504) is fixedly connected to the top of the second spring telescopic rod (502). A third filter plate (505) is fixedly connected to the top of the second filter plate (504). A vibration motor (503) is detachably connected to the bottom of the second filter plate (504).

9. The lithium battery copper-aluminum foil and positive and negative electrode powder deep separation equipment according to claim 8, characterized in that: The collection unit (6) includes a positive and negative electrode separator (601) detachably connected to the top of the support plate (8). One end of the positive and negative electrode separator (601) is fixedly connected to a powder collection pipe (602). The outer wall of the powder collection pipe (602) is fixedly connected to a first collection pipe (603). The top of the first collection pipe (603) is fixedly connected to the bottom end of the kneading chamber (201). The bottom end of the conveying pipe (303) is fixedly connected to an air outlet (605). The bottom end of the air outlet (605) is fixedly connected to a second collection pipe (605). 04), the bottom end of the second collecting pipe (604) is fixedly connected to the powder collecting pipe (602), the outer wall of the screening chamber (501) is detachably connected to the third collecting pipe (606), the bottom end of the third collecting pipe (606) is fixedly connected to the outer wall of the powder collecting pipe (602), the end of the positive and negative electrode separator (601) away from the powder collecting pipe (602) is fixedly connected to the connecting pipe (607), and the end of the connecting pipe (607) away from the positive and negative electrode separator (601) is fixedly connected to the positive and negative electrode powder classification bin (608).

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