A lithium battery negative electrode waste recycling device

Abstract

The application relates to the technical field of lithium battery production and recycling, and discloses a lithium battery negative electrode waste recovery device, which comprises a separation assembly, a screening assembly for screening copper foils and an impurity separation assembly for separating graphite powder and a binder are sequentially arranged below the separation assembly, the separation assembly, the screening assembly and the impurity separation assembly are fixed in a cabinet body, and an integrated recovery space is formed through the cabinet body; while crushing the waste materials, the device attracts the magnetic air plug to slide through the magnetic screen, makes the air jet outlet directionally spray airflow, can blow up the graphite powder to realize preliminary screening, and can realize real-time flushing of the screen through the airflow, prevents the graphite powder from blocking the screen pores, does not need frequent shutdown and cleaning, ensures continuous crushing and separation processes, improves the overall recovery efficiency, avoids mixing of different components through three-stage separation processes, improves the recovery purity of the graphite powder and the copper foils, reduces the purification difficulty of subsequent reuse processing, and solves the problems of low recovery efficiency and low purity in the prior art.

Description

Technical Field

[0001] This invention relates to the field of lithium battery production and recycling technology, specifically to a lithium battery negative electrode waste recycling device. Background Technology

[0002] The recycling of lithium battery anode waste has significant economic and environmental value: graphite can be purified and reused in anode manufacturing, and copper foil can be melted and reused. This reduces resource waste and avoids environmental pollution caused by the indiscriminate disposal of waste. Therefore, lithium battery anode waste recycling equipment has become a key piece of equipment in the lithium battery industry chain and is widely used in battery recycling plants, new energy material production enterprises, and other scenarios.

[0003] Currently, the core problems of lithium battery anode waste recycling devices on the market are: poor coordination between crushing and separation processes. Traditional devices require the waste to be crushed first, and then manually transferred to the separation equipment for the separation of graphite and copper foil. This is not only inefficient, but also prone to loss and pollution due to flying graphite powder. At the same time, the screen is easily clogged by graphite powder during the separation process, requiring frequent shutdowns for cleaning, which further reduces the processing efficiency. In addition, some devices have improper airflow direction control, which either fails to effectively blow away the graphite powder, resulting in incomplete separation, or the airflow is too strong and blows away the copper foil, or causes graphite powder to leak from the feed port.

[0004] Therefore, a lithium battery negative electrode waste recycling device is proposed to solve the problems of low recycling efficiency and insufficient purity in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a lithium battery negative electrode waste recycling device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a lithium battery negative electrode waste recycling device, comprising a separation component, wherein a screening component and an impurity separation component are sequentially arranged below the separation component.

[0007] The detachment component, screening component, and impurity separation component are all fixed inside the cabinet, forming an integrated recycling space.

[0008] The detachment assembly includes a processing box fixedly installed on the inner wall of the cabinet. Inside the processing box, a driving roller and a driven roller are rotatably installed in parallel. The driving roller drives the driven roller through a gear set, and the number of teeth on the driving roller side of the gear set is less than the number of teeth on the driven roller side.

[0009] The active roller and the driven roller are connected to the interior of the external air source through a gas connection box and a ventilation pipe. Both the active roller and the driven roller have crushing wheels fixed on their outer walls and ventilation ports that communicate with the crushing wheels.

[0010] The crushing wheel includes an internal air chamber, and a plurality of crushing teeth are fixedly arranged on the outer wall of the crushing wheel. The crushing teeth are connected to the air chamber through an air jet port, and a magnetic air plug is slidably installed inside the air jet port. The magnetic air plug is connected to a spring fixed to the inner wall of the air jet port. A screen fixed to the inner wall of the processing box is provided below the crushing wheel.

[0011] The airflow enters the drive roller and driven roller through the gas connection box from the external air source, and enters the air chamber through the air inlet. The magnetic air plug is blocked by the spring force to block the air jet, so that the airflow stays in the air chamber. When the crushing wheel rotates, the magnetic air plug that passes through the screen is attracted and slides to open the air jet, and the airflow is ejected from the air jet to perform air jet screening on the material.

[0012] Preferably, the outer opening of the jet nozzle is larger than the inner opening, the magnetic air plug is provided with several air guide grooves near one end of the air chamber, and several guide plates are fixedly installed inside the processing box between the crushing wheels.

[0013] Preferably, the active roller extends out of one end of the processing box and is fixedly connected to the output end of the first motor. The first motor is fixedly installed on the outer wall of the processing box. A gear set is fixedly connected to the end of the active roller away from the output end of the first motor. The active roller drives the driven roller through the gear set.

[0014] Preferably, the gear set includes: a gear one fixedly mounted on the outer wall of the drive roller; a gear two rotatably mounted on the outer wall of the processing box and meshing with the gear one; a gear three fixedly mounted on the driven roller extending out of the processing box; and a gear four rotatably mounted on the outer wall of the processing box and meshing with the gear three, wherein the gear four meshes with the gear two, and the number of teeth of the gear one and the gear two is less than that of the gear three and the gear four.

[0015] Preferably, the impurity separation component includes an air separator, which is fixedly installed at the bottom of the screening box. An annular air duct is fixedly installed on the inner wall of the air separator, and the annular air duct is connected to the fan and the processing box through a pipe. An air suction hood is fixedly installed on the same side of the processing box and the screening box. The pipe includes an air suction pipe and an air outlet pipe. The air suction hood is fixedly connected to the input end of the fan through the air suction pipe, and the output end of the fan is connected to the annular air duct through the air outlet pipe.

[0016] Preferably, the air separator is divided into a cylindrical body and a conical body. The annular air duct is fixedly installed on the inner wall of the cylindrical body. The inner wall of the annular air duct is provided with air nozzles that are inclined in the same direction. A discharge pipe is fixedly installed on the side of the air separator away from the outlet pipe. The discharge pipe extends into one end of the cylindrical body of the air separator and extends to the top of the conical body. The end of the discharge pipe that extends out of the air separator is connected to an external adhesive collection device.

[0017] Preferably, a collection box is fixedly installed at the bottom of the air separator via a flange, the fan is fixedly installed on the bottom inner wall of the cabinet, on the same side as the suction hood, and the air outlet pipe at the output end of the fan is connected to one end of the annular air duct extending out of the air separator via a flange.

[0018] Preferably, the screening assembly includes a screening box, which is fixedly installed on the inner wall of the cabinet via a connecting rod. A turning roller is fixedly installed on the inner wall of the screening box via a threaded drive mechanism. An electric slide rail is fixedly installed on the inner wall of the screening box. A mounting bracket is slidably installed on the top of the electric slide rail. A filter hole is provided at the bottom of the collection drawer. An installation opening is provided on the side of the screening box near the cabinet door. The collection drawer is slidably installed on the top of the mounting bracket through the installation opening. An infrared sensor is fixedly installed on the inner wall of the screening box, located above the collection drawer, for detecting when the collection drawer is installed in place.

[0019] Preferably, the threaded drive mechanism is fixedly installed inside the screening box above the collection drawer, and the bottom of the connecting frame is fixedly installed with a flipping roller via a telescopic rod.

[0020] Preferably, the cabinet is further provided with a ventilation mechanism, which includes an air inlet pipe. The air inlet pipe is fixedly installed on the side of the processing box and the screening box away from the suction hood. The air inlet pipe is connected through a ventilation pipe, which is connected to an external air source. A filter pipe is provided between the ventilation pipe and the external air source. The gas connection box is connected to the ventilation pipe through an air pipe. The top of the cabinet is equipped with a feeding mechanism, which includes a feeding hopper. The feeding hopper is fixedly installed on the top of the processing box through a feeding square tube, and a solenoid valve is installed inside the feeding square tube.

[0021] Compared with the prior art, the present invention provides a lithium battery negative electrode waste recycling device, which has the following beneficial effects: 1. This lithium battery negative electrode waste recycling device, while crushing the waste, uses a magnetic screen to attract a sliding magnetic air plug, causing the air jet to be directed outwards. This not only blows up the graphite powder for preliminary screening, but also prevents the heavier copper foil from being blown away because the air jet is only directed downwards, thus avoiding the leakage of graphite powder from the feed tube. At the same time, the air jet can clean the screen in real time, preventing graphite powder from clogging the screen pores. This eliminates the need for frequent shutdowns for cleaning, ensuring continuous crushing and separation processes and improving overall recycling efficiency.

[0022] 2. This lithium battery negative electrode waste recycling device achieves initial separation of graphite and copper foil through air jet screening during crushing. The tumbling roller of the screening component removes residual graphite from the surface of the copper foil. The annular airflow of the impurity separation component further separates graphite and binder. The combination of the three-stage separation process avoids mixing of different components, improves the recycling purity of graphite powder and copper foil, and reduces the purification difficulty of subsequent reuse processing. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort: Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the impurity separation component connected to an embodiment of the present invention; Figure 4 This is a schematic diagram of the detached component structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the gear set and its connected mechanism according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the crushing wheel and its connected mechanism according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the impurity separation component structure according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the screening component structure according to an embodiment of the present invention.

[0024] In the diagram: 1. Cabinet; 2. Detachment Components; 201. Processing Box; 202. Driven Roller; 203. Driven Roller; 204. Gear 1; 205. Gear 2; 206. Gear 3; 207. Gear 4; 208. Gas Connection Box; 209. Air Pipe; 210. Crushing Wheel; 211. Vent; 212. Connecting Port; 213. Air Chamber; 214. Air Jet Nozzle; 215. Magnetic Air Plug; 216. Spring; 217. Screen; 218. Guide Plate; 219. Motor 1; 3. Screening components; 301. Screening box; 302. Electric slide rail; 303. Mounting bracket; 304. Collection drawer; 305. Infrared sensor one; 306. Threaded drive mechanism; 307. Connecting bracket; 308. Telescopic rod; 309. Tilting roller; 4. Impurity separation assembly; 401. Air separator; 402. Collection box; 403. Blower; 404. Suction hood; 405. Suction pipe; 406. Exhaust pipe; 407. Circular duct; 408. Nozzle; 409. Discharge pipe; 5. Feeding mechanism; 501. Feeding hopper; 502. Feeding square tube; 6. Cabinet doors; 7. Ventilation system; 701. Ventilation duct; 702. Air inlet duct; 703. Filter duct. Detailed Implementation

[0025] 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.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Please see Figure 1-8 The present invention provides a technical solution: a lithium battery negative electrode waste recycling device, including a separation component 2, and a screening component 3 for screening copper foil and an impurity separation component 4 for separating graphite powder and binder are arranged sequentially below the separation component 2.

[0028] The separation component 2, the screening component 3, and the impurity separation component 4 are all fixed inside the cabinet 1, forming an integrated recycling space through the cabinet 1.

[0029] Furthermore, a feeding mechanism 5 is provided on the top of the cabinet 1. The feeding mechanism 5 includes a feeding hopper 501, which is fixedly installed on the top of the disengagement component 2 through a feeding square tube 502. A solenoid valve is provided inside the feeding square tube 502 to control the feeding speed.

[0030] The solenoid valve inside the feeding square tube 502 can precisely adjust the feeding speed and can be flexibly adapted to the processing progress of the waste in the detachment component 2, avoiding blockage of the detachment component 2 due to feeding too fast or idling of the equipment due to feeding too slow.

[0031] Please see Figure 3-6Furthermore, the detachment component 2 includes a processing box 201 fixedly installed on the inner wall of the cabinet 1. Inside the processing box 201, a driving roller 202 and a driven roller 203 are rotatably installed in parallel. The driving roller 202 drives the driven roller 203 through a gear set. The number of teeth on the driving roller side of the gear set is less than the number of teeth on the driven roller side, so that the rotational speed of the driving roller 202 is higher than the rotational speed of the driven roller 203, thereby generating a speed difference.

[0032] Furthermore, the gear set includes: a gear 204 fixedly mounted on the outer wall of the drive roller 202; a gear 205 rotatably mounted on the outer wall of the processing box 201 and meshing with the gear 204; a gear 206 fixedly mounted on one end of the driven roller 203 extending out of the processing box 201; and a gear 207 rotatably mounted on the outer wall of the processing box 201 and meshing with the gear 206. The gear 207 meshes with the gear 205, and the number of teeth of the gear 204 and the gear 205 is less than that of the gear 206 and the gear 207.

[0033] Gear 1 204 and Gear 2 205 have fewer teeth than Gear 3 206 and Gear 4 207, which creates a speed difference between the driving roller 202 and the driven roller 203, enhancing the squeezing and shearing force on the waste material, improving the crushing efficiency of graphite agglomerates, and preventing the copper foil from being excessively crushed and damaged. Through the meshing of the gear set, it is ensured that the driven roller 203 and the driving roller 202 rotate in opposite directions. With the help of the guide plate 218, the waste material can be gathered towards the center, reducing the residue of waste material on the inner wall of the processing box 201.

[0034] The active roller 202 extends out of one end of the processing box 201 and is fixedly connected to the output end of the motor 219. The motor 219 is fixedly installed on the outer wall of the processing box 201. A gear set is fixedly connected to the end of the active roller 202 away from the output end of the motor 219. The active roller 202 drives the driven roller 203 through the gear set. The active roller 202 drives the driven roller 203 through the gear set to avoid uneven waste processing caused by asynchronous power of the two rollers.

[0035] The active roller 202 and the driven roller 203 are connected to the interior of the external air source through a gas connection box 208 and a ventilation pipe 701. Both the active roller 202 and the driven roller have crushing wheels 210 fixed on their outer walls and have air vents 211 that communicate with the crushing wheels 210.

[0036] The crushing wheel 210 includes an internal air chamber 213. A plurality of crushing teeth are fixedly arranged on the outer wall of the crushing wheel 210. The crushing teeth are connected to the air chamber 213 through an air jet 214. A magnetic air plug 215 for sealing is slidably installed in the air jet 214. The magnetic air plug 215 is reset by a spring 216 fixed to the inner wall of the air jet 214.

[0037] A screen 217, fixed to the inner wall of the processing box 201, is provided below the crushing wheel 210 to trap uncrushed materials.

[0038] The airflow enters the drive roller 202 and driven roller 203 through the gas connection box 208 from the external air source, and enters the air chamber 213 through the air inlet 211. The magnetic air plug 215 is blocked by the spring 216 to block the air jet 214, so that the airflow stays in the air chamber 213. When the crushing wheel rotates, the magnetic air plug 215 passing through the screen 217 slides due to magnetic attraction to open the air jet 214, and the airflow is ejected from the air jet 214 to perform air jet screening on the material.

[0039] The air chamber 213 and air jet 214 of the crushing wheel 210 cooperate with the magnetic air plug 215 to simultaneously complete crushing and air jet screening.

[0040] Furthermore, the outer opening of the jet nozzle 214 is larger than the inner opening, the magnetic air plug 215 is provided with several air guide grooves near one end of the air chamber 213, and several guide plates 218 are fixedly installed inside the processing box 201, located between the crushing wheels 210, for guiding materials.

[0041] The outer opening of the jet nozzle 214 is larger than the inner opening, which can prevent the magnetic air plug 215 from getting stuck and increase the jet area. The magnetic air plug 215 is made of magnetic material and, together with the magnetic screen 217, can achieve directional sliding air guidance. The spring 216 can pull the magnetic air plug 215 to reset, ensuring continuous and stable jet screening. The screen 217 is made of magnetic material, which can both attract the magnetic air plug 215 and filter copper foil and graphite powder. The guide plate 218 can guide the waste to gather towards the center of the crushing wheel 210, avoid the accumulation of waste in the processing box 201, and improve crushing efficiency.

[0042] Furthermore, a suction hood 404 is fixedly installed on one side of the processing box 201. The suction hood 404 is used to receive floating graphite dust. The pipeline includes a suction pipe 405 and an exhaust pipe 406. The suction hood 404 is fixedly connected to the input end of the fan 403 through the suction pipe 405. The output end of the fan 403 is connected to the annular air duct 407 through the exhaust pipe 406.

[0043] Please see Figure 7 Further, The impurity separation component 4 includes an air separator 401, which is fixedly installed at the bottom of the screening box 301. An annular air duct 407 for generating annular airflow is fixedly installed on the inner wall of the air separator 401. The annular air duct 407 is connected to the fan 403 and the processing box 201 through a pipe.

[0044] The annular duct 407 of the impurity separation component 4 achieves fine separation of graphite and binder through annular airflow. The annular duct 407 connects the fan 403 and the processing box 201 to ensure airflow circulation.

[0045] The suction hood 404 collects the graphite powder floating in the processing box 201 and the screening box 301, preventing dust leakage and pollution of the operating environment; the suction pipe 405 and the exhaust pipe 406 work together to directionally transport the graphite powder to the air classifier 401, reducing the loss of graphite powder during the transfer process; the fan 403 provides power for the airflow, ensuring that the graphite powder quickly enters the air classification stage.

[0046] Furthermore, the air separator 401 is divided into a cylindrical body and a conical body. The annular air duct 407 is fixedly installed on the inner wall of the cylindrical body. The inner wall of the annular air duct 407 is provided with air nozzles 408 that are inclined in the same direction. A discharge pipe 409 is fixedly installed on the side of the air separator 401 away from the outlet air duct 406. The discharge pipe 409 extends into one end of the cylindrical body of the air separator 401 and extends to the top of the conical body. The end of the discharge pipe 409 extending out of the air separator 401 is connected to an external adhesive collection device.

[0047] The cylindrical and conical combination structure of the air separator 401 provides a stable spatial environment for the stratification of graphite powder and binder, avoiding incomplete separation caused by airflow turbulence; the nozzle 408 of the annular air duct 407 generates annular airflow that is inclined in the same direction, using density differences to achieve precise separation of graphite and binder; the discharge pipe 409 extends to the top of the conical body to capture lightweight binder particles moving with the airflow, and connects to an external collection device to achieve centralized recovery of binder, preventing it from mixing with graphite and affecting purity.

[0048] Furthermore, a collection box 402 is fixedly installed at the bottom of the air separator 401 via a flange for collecting graphite powder. The fan 403 is fixedly installed on the bottom inner wall of the cabinet 1, on the same side as the suction hood 404. The air outlet pipe 406 at the output end of the fan 403 is connected to one end of the annular air pipe 407 extending out of the air separator 401 via a flange.

[0049] The collection box 402 is fixed to the bottom of the air separator 401 by a flange, which facilitates quick disassembly and cleaning, and efficiently recovers the purified graphite powder, reducing the difficulty of subsequent material handling; the fan 403 is fixed to the bottom inner wall of the cabinet 1 to ensure the stability of operation and avoid airflow transmission caused by fan shaking; the air outlet duct 406 is connected to the annular air duct 407 by a flange, which facilitates the maintenance and replacement of the pipeline in the future.

[0050] Furthermore, the cabinet 1 is also equipped with a ventilation mechanism 7, which includes an air inlet pipe 702. The air inlet pipe 702 is fixedly installed on the side of the processing box 201 and the screening box 301 away from the suction hood 404. The air inlet pipe 702 is connected through a ventilation pipe 701, which is connected to an external air source. A filter pipe 703 is provided between the ventilation pipe 701 and the external air source to filter impurities in the gas. The gas connection box 208 is connected to the ventilation pipe 701 through an air pipe 209 to supply air to the inside of the crushing wheel 210.

[0051] The air inlet duct 702 works in conjunction with the ventilation duct 701 to supplement clean airflow into the processing box 201 and the screening box 301, balancing the negative pressure inside the box caused by the suction hood 404. The filter duct 703 filters impurities in the external air source to prevent dust from entering the box and contaminating the waste, ensuring the purity of the recovered graphite and copper foil. The air duct 209 connects the ventilation duct 701 to the gas connection box 208 to provide stable air supply to the air chamber 213 of the crushing wheel 210.

[0052] Please see Figure 8 Further, The screening component 3 includes a screening box 301, which is fixedly installed on the inner wall of the cabinet 1 via a connecting rod. A suction hood 404 is fixedly installed on one side of the screening box 301 and connected to a suction pipe 405. A turning roller 309 is fixedly installed on the inner wall of the screening box 301 via a threaded drive mechanism 306 for further separating graphite and copper foil.

[0053] Furthermore, an electric slide rail 302 is fixedly installed on the inner wall of the screening box 301, and an mounting bracket 303 is slidably installed on the top of the electric slide rail 302 for installing a collection drawer 304. The bottom of the collection drawer 304 is provided with filter holes for screening copper foil and graphite powder. An installation opening is provided on the side of the screening box 301 near the cabinet door 6. The collection drawer 304 is slidably installed on the top of the mounting bracket 303 through the installation opening. An infrared sensor 305 is fixedly installed on the inner wall of the screening box 301, located above the collection drawer 304, for detecting that the collection drawer 304 is installed in place.

[0054] The electric slide rail 302 drives the mounting bracket 303 to slide, realizing the left and right reciprocating motion for screening and preventing blockage; the filter holes at the bottom of the collection drawer 304 realize secondary screening of graphite and copper foil, improving the separation accuracy; the infrared sensor 305 can accurately detect whether the collection drawer 304 is installed in place, avoiding the leakage of mixture from the gap due to installation misalignment, and reducing material waste.

[0055] Furthermore, the threaded drive mechanism 306 is fixedly installed inside the screening box 301 above the collection drawer 304. The threaded drive mechanism 306 is used to drive the connecting frame 307. The bottom of the connecting frame 307 is fixedly installed with a turning roller 309 via a telescopic rod 308. The turning roller 309 is used to crush and separate copper foil and graphite.

[0056] The threaded drive mechanism 306 drives the connecting frame 307 to move, so that the turning roller 309 can cover the entire area inside the screening box 301, avoiding the existence of separation dead corners; the telescopic rod 308 can flexibly adjust the height of the turning roller 309; the repeated rolling of the turning roller 309 can remove the graphite powder remaining on the surface of the copper foil, significantly improving the recycling purity of the copper foil.

[0057] In actual operation, when this device is used, By following these steps, the hopper 501 of the top feeding mechanism 5 of cabinet 1 is opened, and the lithium battery negative electrode waste is poured in. The feeding speed is adjusted by the solenoid valve inside the feeding square tube 502, so that the waste is evenly fed into the processing box 201 of the detachment component 2. The motor 219 drives the active roller 202 to rotate, and the active roller 202 drives the driven roller 203 to rotate through the gear set. Because the number of teeth of gear 1 204 and gear 205 is less than that of gear 3 206 and gear 4 207, a speed difference is generated between the active roller 202 and the driven roller 203. The crushing wheel 210 on the outer wall of both rollers, together with the guide plate 218 in the processing box 201, crushes the waste.

[0058] Meanwhile, after the external air source filters impurities through the filter pipe 703, it is introduced into the gas connection box 208 through the ventilation pipe 701 and the air pipe 209, and then enters the inside of the active roller 202 and the driven roller 203. It then flows into the air chamber 213 of the crushing wheel 210 through the air inlet 211. The magnetic screen 217 in the processing box 201 attracts the magnetic air plug 215 inside the crushing wheel 210 to slide outward. The magnetic air plug 215 stretches the spring 216, and the air guide groove on its surface guides the air chamber 213 and the air jet 214. The gas is sprayed out directionally from the air jet 214 to perform preliminary screening of the crushed copper foil and graphite powder. The screening process is as follows: the graphite powder is blown up by the airflow, and the copper foil remains at the bottom due to its greater weight. Subsequently, the fine graphite powder is captured by the suction hood 404, and the copper foil falls into the screening box 301 of the screening component 3 through the screen 217.

[0059] Inside the screening box 301, the collection drawer 304 is slid into the top of the mounting frame 303 through the installation port. The infrared sensor 305 detects and confirms that the collection drawer 304 is installed in place. The electric slide rail 302 drives the mounting frame 303 to slide left and right to screen the material. At the same time, the threaded drive mechanism 306 is activated, which drives the connecting frame 307 to move. The telescopic rod 308 is adjusted to extend and retract, so that the turning roller 309 comes close to the mixture of copper foil and residual graphite. The turning roller 309 crushes and separates the residual graphite on the surface of the copper foil. The graphite powder falls below through the filter hole of the collection drawer 304, and the copper foil is left in the collection drawer 304.

[0060] The blower 403 of the impurity separation component 4 is started. The blower 403 draws in the graphite powder captured by the suction hood 404 through the suction pipe 405, and then conveys it through the outlet pipe 406 to the annular air duct 407 on the inner wall of the air classifier 401. The nozzles 408 of the annular air duct 407 generate an annular airflow that is inclined in the same direction. The graphite powder is separated into layers inside the air classifier 401. The less dense binder particles are carried by the airflow through the discharge pipe 409 into the external binder collection device, while the denser graphite powder falls into the collection box 402 at the bottom of the air classifier 401. After the recycling is completed, all components are turned off, the cabinet door 6 is opened, and the collection drawer 304 is taken out to recover the copper foil. The flange at the bottom of the air classifier 401 is opened, and the collection box 402 is removed to recover the graphite powder, completing the entire recycling process.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A lithium battery negative electrode waste recycling device, comprising a detachment component, characterized in that: Below the detachment component, a screening component and an impurity separation component are arranged in sequence; The detachment component, screening component, and impurity separation component are all fixed inside the cabinet, forming an integrated recycling space through the cabinet. The detachment assembly includes a processing box fixedly installed on the inner wall of the cabinet. Inside the processing box, a driving roller and a driven roller are rotatably installed in parallel. The driving roller drives the driven roller through a gear set. The number of teeth on the driving roller side of the gear set is less than the number of teeth on the driven roller side. The active roller and the driven roller are connected to the interior of the external air source through a gas connection box and a ventilation pipe. Both the active roller and the driven roller have crushing wheels fixed on their outer walls and ventilation ports that communicate with the crushing wheels. The crushing wheel includes an internal air chamber, and a plurality of crushing teeth are fixedly arranged on the outer wall of the crushing wheel. The crushing teeth are connected to the air chamber through an air jet port. A magnetic air plug is slidably installed inside the air jet port. The magnetic air plug is connected to a spring fixed to the inner wall of the air jet port. A screen fixed to the inner wall of the processing box is provided below the crushing wheel. The airflow enters the drive roller and driven roller through the gas connection box from the external air source, and enters the air chamber through the air inlet. The magnetic air plug is blocked by the spring force to block the air jet, so that the airflow stays in the air chamber. When the crushing wheel rotates, the magnetic air plug that passes through the screen is attracted and slides to open the air jet, and the airflow is ejected from the air jet to perform air jet screening on the material.

2. The lithium battery negative electrode waste recycling device according to claim 1, characterized in that: The outer opening of the jet nozzle is larger than the inner opening. The magnetic air plug is located near one end of the air chamber and has several air guide grooves. Several guide plates are fixedly installed inside the processing box between the crushing wheels.

3. The lithium battery negative electrode waste recycling device according to claim 1, characterized in that: The active roller extends out of one end of the processing box and is fixedly connected to the output end of the first motor. The first motor is fixedly installed on the outer wall of the processing box. A gear set is fixedly connected to the end of the active roller away from the output end of the first motor. The active roller drives the driven roller through the gear set.

4. The lithium battery negative electrode waste recycling device according to claim 1, characterized in that: The gear set includes: a gear one fixedly mounted on the outer wall of the drive roller; a gear two rotatably mounted on the outer wall of the processing box and meshing with the gear one; a gear three fixedly mounted on the driven roller extending out of the processing box; and a gear four rotatably mounted on the outer wall of the processing box and meshing with the gear three. The gear four meshes with the gear two, and the number of teeth of the gear one and the gear two is less than that of the gear three and the gear four.

5. The lithium battery negative electrode waste recycling device according to claim 1, characterized in that: The impurity separation assembly includes an air separator, which is fixedly installed at the bottom of the screening box. An annular air duct is fixedly installed on the inner wall of the air separator, and the annular air duct is connected to the blower and the processing box through a pipe. An air suction hood is fixedly installed on the same side of the processing box and the screening box. The pipe includes an air suction pipe and an air outlet pipe. The air suction hood is fixedly connected to the input end of the blower through the air suction pipe, and the output end of the blower is connected to the annular air duct through the air outlet pipe.

6. The lithium battery negative electrode waste recycling device according to claim 5, characterized in that: The air classifier is divided into a cylindrical body and a conical body. The annular air duct is fixedly installed on the inner wall of the cylindrical body. The inner wall of the annular air duct is provided with air nozzles that are inclined in the same direction. A discharge pipe is fixedly installed on the side of the air classifier away from the outlet air duct. The discharge pipe extends into one end of the cylindrical body of the air classifier and extends to the top of the conical body. The end of the discharge pipe that extends out of the air classifier is connected to an external adhesive collection device.

7. A lithium battery negative electrode waste recycling device according to claim 6, characterized in that: A collection box is fixedly installed at the bottom of the air separator via a flange. The fan is fixedly installed on the bottom inner wall of the cabinet, on the same side as the suction hood. The air outlet pipe at the output end of the fan is connected to one end of the annular air duct that extends out of the air separator via a flange.

8. The lithium battery negative electrode waste recycling device according to claim 1, characterized in that: The screening assembly includes a screening box, which is fixedly installed on the inner wall of the cabinet via a connecting rod. A turning roller is fixedly installed on the inner wall of the screening box via a threaded drive mechanism. An electric slide rail is fixedly installed on the inner wall of the screening box, and a mounting bracket is slidably installed on the top of the electric slide rail. A filter hole is provided at the bottom of the collection drawer. An installation port is provided on the side of the screening box near the cabinet door. The collection drawer is slidably installed on the top of the mounting bracket through the installation port. An infrared sensor is fixedly installed on the inner wall of the screening box, located above the collection drawer, for detecting when the collection drawer is installed in place.

9. A lithium battery negative electrode waste recycling device according to claim 8, characterized in that: The threaded drive mechanism is fixedly installed inside the screening box above the collection drawer, and the bottom of the connecting frame is fixedly installed with a flipping roller via a telescopic rod.

10. A lithium battery negative electrode waste recycling device according to claim 1, characterized in that: The cabinet is also equipped with a ventilation mechanism, which includes an air inlet pipe. The air inlet pipe is fixedly installed on the side of the processing box and the screening box away from the suction hood. The air inlet pipe is connected through a ventilation pipe, which is connected to an external air source. A filter pipe is installed between the ventilation pipe and the external air source. The gas connection box is connected to the ventilation pipe through an air pipe. The top of the cabinet is equipped with a feeding mechanism, which includes a feeding hopper. The feeding hopper is fixedly installed on the top of the processing box through a feeding square tube, and a solenoid valve is installed inside the feeding square tube.

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