A continuous recovery device and method for pulse discharge positive electrode plates based on directional cycling.

Abstract

This invention relates to a continuous recovery device and method for positive electrode sheets based on directional circulation pulse discharge. The recovery device includes a reaction chamber, a conveying mechanism, and a pulse mechanism. The reaction chamber has a receiving cavity for holding the reaction liquid. The conveying mechanism includes a conveyor line and clamps. Multiple clamps are arranged on the conveyor line. The conveying mechanism is provided with a feeding area, a pulse area, and a recovery area. The feeding area is used to feed the positive electrode sheet onto the clamps. Each clamp can sequentially convey the positive electrode sheet to the pulse area and the recovery area. The pulse area is located below the liquid surface of the reaction liquid. The recovery area is used to unload the current collector after the positive electrode sheet is separated. The pulse mechanism includes a driving component and a pulse component. The driving component and the pulse component are connected in a driving connection so that the pulse component can abut against the positive electrode sheet in the pulse area, realizing the pulse discharge separation and recovery of the current collector of the positive electrode sheet and the positive electrode material.

Description

Technical Field

[0001] This invention relates to the field of positive electrode recycling technology, and in particular to a pulse discharge positive electrode continuous recycling device and recycling method based on directional circulation. Background Technology

[0002] With the development of new energy technologies, the demand for lithium-ion batteries has surged. However, due to the limited lifespan of lithium-ion batteries, the number of discarded lithium-ion batteries is also increasing. Therefore, in order to reduce the raw material costs of subsequent lithium-ion batteries and alleviate the environmental pollution caused by discarded lithium-ion batteries, it is necessary to separate and recycle the positive and negative electrode materials, positive and negative current collectors, and battery casings of discarded lithium-ion batteries.

[0003] Currently, the positive electrode sheets in lithium-ion batteries have high recycling value. Related technologies involve using pulse discharge to separate the current collector from the positive electrode material, thereby recovering elements such as nickel, cobalt, and manganese. However, existing pulse discharge recycling devices require cutting the positive electrode sheet into multiple small pieces. Each time, one small piece is fixed between the positive and negative electrodes of the device for high-voltage pulse treatment. After treatment, the small piece is removed and replaced with a new one to be processed. This method allows only one piece to be processed at a time, resulting in low production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a continuous recycling device and method for pulse discharge positive electrode plates based on directional circulation, which has a simple structure, high degree of automation, and high production efficiency.

[0005] To achieve this objective, the embodiments of the present invention adopt the following technical solutions:

[0006] In a first aspect, a continuous recovery device for pulsed discharge positive electrode plates based on directional circulation is provided, comprising a reaction chamber, a conveying mechanism, and a pulse mechanism. The reaction chamber has a receiving cavity for holding a reaction liquid. The conveying mechanism includes a conveyor line and clamps. The conveyor line is disposed on the reaction chamber, and multiple clamps are spaced apart along its conveying direction. The conveying mechanism is sequentially provided with a feeding zone, a pulse zone, and a recovery zone along the conveying direction of the conveyor line. The feeding zone is used to clamp the positive electrode plate onto the clamps. Each clamp can sequentially convey the positive electrode plate to the pulse zone and the recovery zone. The pulse zone is located below the surface of the reaction liquid, and the recovery zone is used to unload the current collector after separation of the positive electrode plate. The pulse mechanism includes a driving member and a pulse element. The driving member is disposed within the receiving cavity and below the pulse zone. The driving member is drively connected to the pulse element so that the pulse element can abut against the positive electrode plate in the pulse zone and apply a pulsed current to the positive electrode plate in the pulse zone.

[0007] As a preferred embodiment of a pulse discharge positive electrode continuous recycling device based on directional circulation, the clamp includes a base, a fixed plate, an elastic element, and a clamping plate. The base is disposed on the conveyor line, and two fixed plates are spaced apart on the base along a first direction. The elastic element is disposed on the fixed plate, and one end of the elastic element away from the fixed plate is connected to the clamping plate. The clamping plate and the fixed plate are spaced apart to form a fixed position for clamping the positive electrode. Both ends of the positive electrode along the first direction are respectively clamped in the two fixed positions.

[0008] As a preferred embodiment of a pulse discharge positive electrode continuous recycling device based on directional circulation, the pulse element includes a positive electrode post and a negative electrode post spaced apart along the first direction. The two clamping plates are respectively provided with a first hole communicating with the fixed position corresponding to the positive electrode post and the negative electrode post. The positive electrode post and the negative electrode post pass through the corresponding first hole and abut against the two ends of the positive electrode.

[0009] In a preferred embodiment of a pulse discharge positive electrode continuous recovery device based on directional circulation, the diameter of the first hole gradually decreases from the side away from the base toward the side closer to the base; and / or,

[0010] The fixing plate is provided with a limiting groove for defining the position of the positive electrode plate; and / or,

[0011] The clamp is made of a conductive material, and the pulse element abuts against the clamp.

[0012] As a preferred embodiment of a pulse discharge positive electrode continuous recovery device based on directional circulation, both the positive electrode post and the negative electrode post include a support part, an elastic part, and an abutment part. Both support parts are disposed on the driving member, and the abutment part is connected to the support part through the elastic part. The elastic part always has the tendency to drive the abutment part to move toward the positive electrode.

[0013] As a preferred embodiment of a pulse discharge positive electrode continuous recycling device based on directional circulation, the conveyor line includes a linkage roller disposed in the pulse region. The receiving cavity has a first cavity wall and a second cavity wall disposed opposite to the first cavity wall. One end of the linkage roller is rotatably disposed on the first cavity wall, and the other end of the linkage roller is spaced apart from the second cavity wall. The driving component includes a guide, a fixed seat, a mounting seat, and a connecting rod. The guide is disposed on the first cavity wall and the second cavity wall, and each guide has a guide groove, the length of which extends vertically. The two ends of the mounting seat are slidably disposed in the two guide grooves, respectively. The pulse element is disposed on the mounting seat. The fixed seat is disposed on the side of the linkage roller away from the first cavity wall, and the fixed seat is spaced apart from the rotation axis of the linkage roller. One end of the connecting rod is hinged to the fixed seat, and the other end of the connecting rod is hinged to the mounting seat. The conveyor line drives the linkage roller to rotate, thereby driving the fixed seat to move the mounting seat along the guide groove, so as to achieve contact or separation between the pulse element and the positive electrode in the pulse region.

[0014] As a preferred embodiment of a pulse discharge positive electrode continuous recycling device based on directional circulation, the top of the reaction chamber is provided with an opening, the conveyor line is at least partially located outside the opening, the feeding area and the recycling area are both located outside the opening, and the feeding area and the recycling area are spaced apart along a second direction.

[0015] As a preferred embodiment of a pulse discharge positive electrode continuous recovery device based on directional circulation, the reaction tank is provided with a discharge port and a water inlet. The discharge port is located at the bottom of the reaction tank and is used to discharge the positive electrode material. The water inlet is used to replenish the reaction liquid in the reaction tank.

[0016] As a preferred embodiment of the pulse discharge positive electrode continuous recycling device based on directional circulation, the pulse discharge positive electrode continuous recycling device based on directional circulation further includes a stirring assembly, which includes a motor, a rotating shaft and stirring blades. The motor is located below the reaction tank, and part of the rotating shaft extends through the bottom of the reaction tank into the receiving cavity. The stirring blades are located on the outer periphery of the rotating shaft within the receiving cavity. The motor is connected to the rotating shaft for transmission to drive the stirring blades to rotate.

[0017] Secondly, a method for continuous recycling of pulse discharge positive electrode sheets is provided, using the aforementioned pulse discharge positive electrode sheet continuous recycling device based on directional circulation, the method comprising the following steps:

[0018] S10. Load the positive electrode sheet onto the clamp in the feeding area of ​​the conveyor line;

[0019] S20. The conveyor line moves the clamp containing the positive electrode from the feeding area to the pulse area, so that the positive electrode is immersed in the reaction solution in the reaction tank.

[0020] S30. After the positive electrode is transferred to the pulse region, the driving component of the pulse mechanism drives the pulse component to rise so that the pulse component abuts against the positive electrode. The pulse component is energized to separate the current collector of the positive electrode from the positive electrode material.

[0021] S40. After the current collector is separated from the positive electrode material, a portion of the positive electrode material actively disperses in the reaction solution. During the process of the current collector, which is still held on the clamp, being transferred from the pulse zone to the recovery zone by the conveyor line, another portion of the positive electrode material that is still attached to the current collector is knocked off by the reaction solution.

[0022] S50. The current collector transferred to the recycling area is removed from the fixture.

[0023] As a preferred embodiment of the continuous recycling method for pulsed discharge positive electrode plates, the conveyor line also provides a linkage roller rotatably disposed in the pulse zone. The driving component is a linkage component, which slides the pulse component on the side wall of the reaction tank, such that one end of the linkage component is hinged to the end face of the linkage roller, and the hinge point between the linkage component and the linkage roller is spaced apart from the rotation axis of the linkage roller, while the other end is hinged to the pulse component.

[0024] During steps S20 to S40, the conveyor line drives the linkage roller to rotate, so that the linkage component synchronously drives the pulse component to contact or space out with the positive electrode sheet.

[0025] As a preferred embodiment of the pulse discharge positive electrode continuous recovery method, step S60 is further included after step S50:

[0026] The reaction tank is equipped with a discharge port and a water inlet. The discharge port is opened to allow the positive electrode material deposited at the bottom of the reaction tank to be discharged, and the reaction solution can be replenished through the water inlet.

[0027] The beneficial effects of this invention are as follows: A conveyor line transfers the positive electrode sheet clamped on the fixture to below the surface of the reaction liquid. A driving component drives a pulse component to move upwards and abut against the positive electrode sheet. Then, the pulse component is energized to separate the current collector of the positive electrode sheet from the positive electrode material. The separated positive electrode material can disperse in the reaction liquid, preventing it from vaporizing into particulate form and drifting away with the air, thus improving the recovery rate of the positive electrode material. The conveyor line can transport the current collector, still clamped on the fixture after separation, to the recovery area for unloading, thereby achieving the separation and recovery of the current collector and positive electrode material, resulting in a high degree of automation. Furthermore, by setting up a feeding area, a pulse area, and a recovery area on the conveyor line, the positive electrode sheet is fed in the feeding area, undergoes a pulse discharge reaction in the pulse area, and the current collector after the pulse is completed is unloaded in the recovery area. This multi-station parallel processing effectively improves the production efficiency of this directional circulation-based pulse discharge positive electrode sheet continuous recovery device. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a schematic diagram of the structure of a pulse discharge positive electrode continuous recovery device based on directional circulation according to an embodiment of the present invention.

[0030] Figure 2 This is a cross-sectional view of a pulse discharge positive electrode continuous recovery device based on directional cycling, according to an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the fixture according to an embodiment of the present invention.

[0032] Figure 4 This is a schematic diagram illustrating the cooperation between the linkage roller and the pulse mechanism in an embodiment of the present invention.

[0033] In the picture:

[0034] 1. Reaction chamber; 11. Receiving cavity; 111. First cavity wall; 12. Opening; 13. Discharge port; 14. Water inlet; 15. Guide surface; 2. Conveying mechanism; 21. Conveyor line; 211. Feeding area; 212. Pulse zone; 213. Recovery zone; 214. Linkage roller; 22. Fixture; 221. Base; 222. Fixing plate; 2221. Limiting groove; 223. Elastic element; 224. Clamping plate; 2241 1. First hole; 225. Fixed position; 3. Pulse mechanism; 31. Driving component; 311. Guide component; 3111. Guide groove; 312. Fixed seat; 313. Mounting seat; 314. Connecting rod; 32. Pulse component; 3211. Support part; 3212. Elastic part; 3213. Abutment part; 321. Positive pole; 322. Negative pole; 4. Stirring assembly; 41. Motor; 42. Rotating shaft; 43. Stirring blade. Detailed Implementation

[0035] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail 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.

[0036] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] Directional Recycling Technology (DRT) is a technology based on reverse product positioning design. Through short-range recycling processes, it recycles failed materials from retired products back into usable materials for future product manufacturing. In the field of power batteries, directional recycling refers to the process of restoring used batteries through pretreatment and hydrometallurgical processes to produce materials needed for manufacturing power batteries. Manufacturers can directly use the processed battery raw materials to create high-quality power batteries.

[0039] Currently, pulsed discharge is used to separate the current collector from the positive electrode material, thereby enabling the recovery of elements such as nickel, cobalt, and manganese from the positive electrode material. The principle of pulsed discharge is as follows: applying a high-voltage pulsed current to the current collector causes it to generate a large amount of heat instantaneously, causing the positive electrode material on the current collector to vaporize. Simultaneously, breakdown occurs, forming plasma, which causes the positive electrode material to detach into small particles and separate from the current collector. Both the small particles of positive electrode material and the current collector can then be recycled and reused.

[0040] like Figure 1 and Figure 2 As shown, the continuous recovery device for pulsed discharge positive electrode plates based on directional circulation according to an embodiment of the present invention includes a reaction tank 1, a conveying mechanism 2, and a pulse mechanism 3. The reaction tank 1 is provided with a receiving cavity 11 for holding the reaction liquid. The conveying mechanism 2 includes a conveying line 21 and clamps 22. The conveying line 21 is disposed on the reaction tank 1, and multiple clamps 22 are spaced apart on the conveying line 21 along its own conveying direction. The conveying mechanism 2 is sequentially provided with a feeding area 211, a pulse area 212, and a recovery area 213 along the conveying direction of the conveying line 21. The feeding area 211 is used to clamp the positive electrode plate on the clamp 22. Each clamp 22 can sequentially convey the positive electrode plate to the pulse area 212 and the recovery area 213. Zone 213 and pulse zone 212 are located below the surface of the reaction liquid. Zone 213 is used to unload the current collector after the positive electrode is separated. The pulse mechanism 3 includes a drive member 31 and a pulse member 32. The drive member 31 is disposed in the receiving cavity 11 and located below the pulse zone 212. The drive member 31 and the pulse member 32 are connected in a transmission manner so that the pulse member 32 can abut against the positive electrode in the pulse zone 212 and apply a pulse current to the positive electrode in the pulse zone 212 to separate the current collector of the positive electrode from the positive electrode material. The conveyor line 21 can transfer the current collector in the pulse zone 212 that is still clamped in the clamp 22 to the recovery zone 213, wherein the positive electrode material is dispersed in the reaction liquid.

[0041] Understandably, the principle of pulse discharge separation is that a large amount of heat is instantly generated on the current collector by a pulse current, causing some of the positive electrode material to vaporize. At the same time, breakdown occurs and plasma is formed, which causes the positive electrode material to form small particles and separate from the current collector. The positive electrode sheet clamped on the fixture 22 is moved to the surface of the reaction liquid by the conveyor line 21. The driving component 31 drives the pulse component 32 to move upward and abut against the positive electrode sheet. Then the pulse component 32 is energized again to separate the current collector of the positive electrode sheet from the positive electrode material. The separated positive electrode material can float in the reaction liquid, avoiding the positive electrode material vaporized into particles and drifting away with the air, which helps to improve the recovery rate of the positive electrode material. The conveyor line 21 can transport the current collector that is still clamped on the fixture 22 after separation to the recovery area 213 for unloading, so as to realize the separation and recovery of the current collector of the positive electrode sheet from the positive electrode material, with a high degree of automation.

[0042] In addition, such as Figure 1 and Figure 2 As shown, multiple clamps 22 are arranged on the conveyor line 21 along its own transmission direction, so that clamps 22 are provided in the loading area 211, the pulse area 212 and the unloading area at the same time. This allows the directional circulation-based pulse discharge positive electrode continuous recycling device to load positive electrode sheets in the loading area 211, perform pulse discharge reaction on the positive electrode sheets by the pulse mechanism 3 in the pulse area 212, and unload the current collector after the pulse is completed in the recycling area 213. The multi-station parallel processing effectively improves the production efficiency of the directional circulation-based pulse discharge positive electrode continuous recycling device.

[0043] It should be noted that the spacing between two adjacent clamps 22 is equal. The drive motor of the conveyor line 21 is driven rhythmically to ensure the consistency of the feeding of positive electrode sheets, the pulse discharge reaction of positive electrode sheets, and the unloading of current collectors, thereby ensuring the stability of the production efficiency of positive electrode sheet separation and recycling.

[0044] Optionally, such as Figure 3 As shown, after separating the current collector of the positive electrode sheet from the positive electrode material, it is necessary to effectively desorb the positive electrode material from the current collector. Therefore, the clamp 22 includes a base 221, a fixing plate 222, an elastic element 223, and a clamping plate 224. The base 221 is disposed on the conveyor line 21. Two fixing plates 222 are spaced apart on the base 221 along a first direction (the first direction is the X direction shown in the figure). An elastic element 223 is disposed on the fixing plate 222. One end of the elastic element 223 away from the fixing plate 222 is connected to the clamping plate 224. The clamping plate 224 and the fixing plate 222 are spaced apart to form a fixing position 225 for clamping the positive electrode sheet. Both ends of the positive electrode sheet along the first direction are clamped in the two fixing positions 225 respectively. By clamping the positive electrode sheet between two spaced-apart fixing plates 222 and clamping plate 224, most of the area of ​​the positive electrode sheet near the base 221 is separated from the base 221, while most of the side of the positive electrode sheet away from the base 221 is exposed. This allows the positive electrode material to desorb into the reaction solution after the current collector and the positive electrode material are separated, reducing the situation where the positive electrode material is still pressed on the current collector by the clamp 22, improving the effect of pulse separation of the current collector and the positive electrode material, and reducing the waste of positive electrode material.

[0045] like Figure 3 As shown, in this embodiment, the elastic element 223 is a tension spring. The tension spring ensures that the clamping plate 224 always tends to move towards the fixing plate 222. This effectively guarantees the stability of the positive electrode sheet clamping and allows the positive electrode sheet to be held by the clamp 22 even after it is separated into a thinner current collector, preventing the current collector from falling out of the clamp 22 into the reaction chamber 1. Of course, the tension spring has a certain length, and the positive electrode sheet is relatively thin. To ensure the stability of the positive electrode sheet being clamped, a second hole is provided on the fixing plate 222, and the tension spring is placed inside the second hole to avoid the length of the tension spring occupying the space of the fixing position 225.

[0046] Furthermore, such as Figure 3 and Figure 4 As shown, the pulse device 32 includes a positive terminal 321 and a negative terminal 322 spaced apart along a first direction. Two clamping plates 224 each have a first hole 2241 corresponding to the positive terminal 321 and the negative terminal 322, communicating with the fixing position 225. The positive terminal 321 and the negative terminal 322 pass through the corresponding first hole 2241 and abut against both ends of the positive electrode plate. Since only the current collector can conduct electricity, the current collector is exposed at least at the position relative to the first hole 2241. The positive terminal 321 and the negative terminal 322 abut against both ends of the current collector to form a current-carrying circuit, allowing the pulse current to flow through the current collector. By setting the first hole 2241, when the positive electrode post 321 and the negative electrode post 322 come into contact with the positive electrode plate, the side of the positive electrode plate away from the positive electrode post 321 or the negative electrode post 322 is supported by the fixing plate 222, which prevents the positive electrode plate from being punctured by the positive electrode post 321 or the negative electrode post 322, or from being pushed and displaced by the positive electrode post 321 or the negative electrode post 322, thus effectively ensuring the structural and positional stability of the positive electrode plate during the pulse discharge reaction.

[0047] Preferably, such as Figure 2 and Figure 3 As shown, the diameter of the first hole 2241 gradually decreases from the side away from the base 221 toward the side closer to the base 221. That is, the hole wall of the first hole 2241 can serve as a guide surface 15 for the positive electrode post 321 and the negative electrode post 322, so that when the driving member 31 drives the positive electrode post 321 and the negative electrode post 322 to move toward the positive electrode plate, they can accurately contact the current collector along the guide surface 15, thereby improving the positional stability of the contact between the positive electrode post 321 and the negative electrode post 322 and the current collector.

[0048] In this embodiment, as Figure 3 As shown, each clamping plate 224 is connected to the fixing plate 222 via two elastic elements 223 to improve the stability of the clamping plate 224 during the installation and removal of the positive electrode sheet. Preferably, the clamping plate 224 is made of conductive material, and the pulse element 32 abuts against the clamping plate 224. In this embodiment, the positive electrode post 321 and the negative electrode post 322 abut against the hole wall of the first hole 2241. That is, in addition to abutting against the current collector themselves, the positive electrode post 321 and the negative electrode post 322 can also abut against the current collector through the clamping plate 224 to ensure the stability of the connection between the positive electrode post 321 and the negative electrode post 322 and the current collector, thereby avoiding the exposed part of the current collector on the positive electrode sheet from being separated from the positive electrode post 321 or the negative electrode post 322 and thus failing to form a complete power circuit. In addition, the base 221 and the fixing plate 222 are made of insulating material to improve the stability of current flow and prevent current from being conducted to the transmission line 21 and affecting the operation of other structures.

[0049] Furthermore, such as Figure 3As shown, the fixing plate 222 has a limiting groove 2221 for defining the position of the positive electrode plate. The limiting groove 2221 helps to improve the positional stability of the positive electrode plate, so as to ensure the accuracy of the contact between the positive electrode post 321 and the negative electrode post 322 and the current collector.

[0050] Furthermore, such as Figure 4 As shown, both the positive terminal 321 and the negative terminal 322 include a support portion 3211, an elastic portion 3212, and an abutment portion 3213. Both support portions 3211 are disposed on the driving member 31. The abutment portion 3213 is connected to the support portion 3211 through the elastic portion 3212. The elastic portion 3212 always has the tendency to drive the abutment portion 3213 to move toward the positive electrode plate. By providing the elastic part 3212, on the one hand, the rigid contact between the contact part 3213 and the positive electrode plate can be effectively buffered, avoiding excessive movement of the contact part 3213 to puncture the positive electrode plate or insufficient movement to maintain a gap with the positive electrode plate, thus ensuring the contact stability between the contact part 3213 and the positive electrode plate; on the other hand, when the contact part 3213 abuts against the wall of the second hole, it can prevent the positive electrode post 321 or the negative electrode post 322 from rigidly contacting the wall of the second hole, reducing the wear of the positive electrode post 321, the negative electrode post 322 and the clamping plate 224, thereby improving the service life of the positive electrode post 321, the negative electrode post 322 and the clamping plate 224.

[0051] In this embodiment, as Figure 2 and Figure 4 As shown, the conveyor line 21 includes a linkage roller 214 disposed in the pulse zone 212. The receiving cavity 11 has a first cavity wall 111 and a second cavity wall disposed opposite to the first cavity wall 111. One end of the linkage roller 214 is rotatably disposed on the first cavity wall 111, and the other end of the linkage roller 214 is spaced apart from the second cavity wall. The driving component 31 includes a guide 311, a fixed seat 312, a mounting seat 313, and a connecting rod 314. Guides 311 are respectively disposed on the first cavity wall 111 and the second cavity wall. Each guide 311 has a guide groove 3111, and the length of the guide groove 3111 extends in the vertical direction. The mounting seat... The two ends of 313 are slidably disposed in the two guide grooves 3111 respectively. The pulse element 32 is disposed on the mounting base 313. The fixed base 312 is disposed on the side of the linkage roller 214 away from the first cavity wall 111, and the fixed base 312 and the rotation shaft 42 of the linkage roller 214 are linearly spaced apart. One end of the connecting rod 314 is hinged to the fixed base 312, and the other end of the connecting rod 314 is hinged to the mounting base 313. The conveyor line 21 drives the linkage roller 214 to rotate, thereby driving the fixed base 312 to make the connecting rod 314 drive the mounting base 313 to move along the guide groove 3111, so as to realize the contact or spacing between the pulse element 32 and the positive electrode plate of the pulse area 212.

[0052] For example, such as Figure 2 and Figure 4As shown, with the transmission of the conveyor line 21, the linkage roller 214 rotates in a circular motion. When the fixed seat 312, which is eccentrically set on the end face of the linkage roller 214, moves from the lowest point to the highest point, it drives the connecting rod 314 to move the mounting seat 313 upward along the guide groove 3111, thereby realizing that the pulse element 32 fixed on the mounting seat 313 rises and abuts against the positive electrode plate. When the fixed seat 312 moves from the highest point to the lowest point with the rotation of the linkage roller 214, it drives the connecting rod 314 to move the mounting seat 313 downward along the guide groove 3111, thereby realizing that the pulse element 32 fixed on the mounting seat 313 moves downward and separates from the current collector, so that the conveyor line 21 can transfer the positive electrode plate in the next clamp 22 to the pulse area 212, and transfer the current collector that has been separated in the pulse area 212 from the pulse area 212 to the recycling area 213. The rotation of the linkage roller 214 drives the fixed base 312 and the connecting rod 314 to drive the pulse element 32, effectively improving the consistency of the contact between the pulse element 32 and the positive electrode plate and the transmission of the positive electrode plate by the conveyor line 21. This also reduces the need for additional active drive mechanisms, thus reducing energy consumption and lowering equipment production costs. In other embodiments, the drive element 31 can also be a linear drive mechanism such as a cylinder or hydraulic cylinder.

[0053] In some embodiments, such as Figure 2 As shown, the top of the reaction chamber 1 has an opening 12. The conveyor line 21 is at least partially located outside the opening 12. The feeding area 211 and the recovery area 213 are both located outside the opening 12, and the feeding area 211 and the recovery area 213 are spaced apart along a second direction (the second direction is the Y direction shown in the figure). By placing the feeding area 211 and the recovery area 213 outside the opening 12, it is convenient for operators to feed the positive electrode sheet into the clamp 22 of the feeding area 211 and to recover the current collector in the recovery area 213, making operation convenient.

[0054] Preferably, such as Figure 2 As shown, the reaction chamber 1 is equipped with a discharge port 13 and a water inlet 14. The discharge port 13 is located at the bottom of the reaction chamber 1 and is used to discharge the positive electrode material. The water inlet 14 is used to replenish the reaction liquid in the reaction chamber 1. Since the positive electrode material is mostly a material with a certain weight, such as metal, it will naturally settle at the bottom of the reaction chamber 1 after desorption from the reaction liquid. The discharge port 13 facilitates the discharge of the positive electrode material deposited at the bottom of the reaction chamber 1, while the water inlet 14 can be used to replenish the reaction chamber 1 in a timely manner, ensuring that the pulse zone 212 is always below the surface of the reaction liquid. This can be carried out without stopping the conveyor line 21 and the pulse mechanism 3, effectively ensuring the production efficiency of the continuous recovery device for pulse discharge positive electrode sheets based on directional circulation.

[0055] Furthermore, such as Figure 2As shown, the continuous recovery device for pulse discharge positive electrode plates based on directional circulation also includes a stirring assembly 4. The stirring assembly 4 includes a motor 41, a rotating shaft 42, and stirring blades 43. The motor 41 is located below the reaction tank 1, and part of the rotating shaft 42 extends through the bottom of the reaction tank 1 into the receiving cavity 11. The stirring blades 43 are located on the outer periphery of the rotating shaft 42 within the receiving cavity 11. The motor 41 is connected to the rotating shaft 42 to drive the stirring blades 43 to rotate. By driving the rotating shaft 42 with the motor 41 to drive the stirring blades 43 to rotate, the positive electrode material is effectively prevented from condensing at the bottom of the reaction tank 1 and blocking the discharge port 13, ensuring the continuity of positive electrode material discharge.

[0056] Furthermore, a guide surface 15 is provided at the bottom of the reaction chamber 1. The guide surface 15 slopes downward from one end away from the bottom of the reaction chamber 1 toward the bottom of the reaction chamber 1 and toward the discharge port 13. The guide surface 15 guides the positive electrode material in the deposition process, so that the positive electrode material is smoothly fed to the discharge port 13.

[0057] This invention also provides a method for continuous recovery of pulse discharge positive electrode sheets, using the directional circulation-based pulse discharge positive electrode sheet continuous recovery device of any of the above embodiments to improve the separation and recovery efficiency of the positive electrode sheets. The method for continuous recovery of pulse discharge positive electrode sheets includes the following steps:

[0058] S10. Load the positive electrode sheet onto the clamp 22 of the loading area 211 of the conveyor line 21;

[0059] S20, the conveyor line 21 moves the clamp 22 loaded with the positive electrode sheet from the loading area 211 to the pulse area 212, so that the positive electrode sheet is immersed in the reaction solution of the reaction tank 1;

[0060] S30. After the positive electrode is transferred to the pulse region 212, the driving component 31 of the pulse mechanism 3 drives the pulse component 32 to rise so that the pulse component 32 abuts against the positive electrode. The pulse component 32 is energized to separate the current collector of the positive electrode from the positive electrode material.

[0061] S40. After the current collector is separated from the positive electrode material, a portion of the positive electrode material actively disperses in the reaction liquid. During the process of the current collector still being held on the clamp 22 being transferred from the pulse area 212 to the recovery area 213 on the conveyor line 21, another portion of the positive electrode material still adhering to the current collector is knocked off by the reaction liquid.

[0062] S50, The current collector transferred to the recycling area 213 is removed from the clamp 22.

[0063] In the above method, the continuous pulse discharge recovery of the positive electrode sheet can be achieved through the cooperation of the conveyor line 21 and the pulse mechanism 3, which effectively improves the pulse discharge recovery efficiency of the positive electrode sheet. Moreover, the positive electrode material adhering to the current collector after separation can be detached by the relative impact of the conveyor line 21 and the reaction liquid, thus ensuring the desorption effect of the positive electrode material.

[0064] In the aforementioned technical solution, the pulse discharge positive electrode continuous recycling device based on directional circulation is provided. The conveyor line 21 also provides a linkage roller 214 rotatably disposed in the pulse zone 212. The driving component 31 is a linkage component, and the pulse component 32 is slidably disposed on the side wall of the reaction chamber 1. One end of the linkage component is hinged to the end face of the linkage roller 214, and the hinge point between the linkage component and the linkage roller 214 is spaced apart from the rotation axis 42 of the linkage roller 214. The other end is hinged to the pulse component 32.

[0065] During steps S20 to S40, the conveyor line 21 drives the linkage roller 214 to rotate, causing the linkage component to synchronously drive the pulse component 32 to contact or space out with the positive electrode plate. By coordinating the linkage roller 214 with the linkage component, the contact or space out between the pulse component 32 and the positive electrode plate of the pulse area 212 is achieved, improving the consistency between the movement of the pulse component 32 and the transmission of the conveyor line 21.

[0066] Correspondingly, after step S50, step S60 is also included: the reaction tank 1 is provided with a discharge port 13 and a water inlet 14. The discharge port 13 is opened to discharge the positive electrode material deposited at the bottom of the reaction tank 1, and the reaction liquid can be replenished at the water inlet 14. This ensures that the pulse discharge positive electrode continuous recovery device based on directional circulation can continuously recover the positive electrode material while simultaneously discharging it in a timely manner, avoiding equipment shutdown due to the need to discharge the positive electrode material.

[0067] In the description herein, it should be understood that the terms "upper" and "lower," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0068] In the description of this specification, references to terms such as "an embodiment" indicate that a specific feature, structure, material, or characteristic associated with that embodiment is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment.

[0069] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0070] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A continuous recovery device for pulse discharge positive electrode plates based on directional circulation, characterized in that, include: The reaction chamber (1) is provided with a container (11) for holding the reaction liquid. The conveying mechanism (2) includes a conveying line (21) and a clamp (22). The conveying line (21) is set on the reaction tank (1). Multiple clamps (22) are spaced apart on the conveying line (21) along its own conveying direction. The conveying mechanism (2) is arranged in sequence along the conveying direction of the conveying line (21) with a feeding area (211), a pulse area (212) and a recovery area (213). The feeding area (211) is used to clamp the positive electrode sheet on the clamp (22). Each clamp (22) can transport the positive electrode sheet to the pulse area (212) and the recovery area (213) in sequence. The pulse area (212) is located below the liquid surface of the reaction liquid. The recovery area (213) is used to unload the current collector after the positive electrode sheet is separated. The pulse mechanism (3) includes a drive member (31) and a pulse member (32). The drive member (31) is disposed in the receiving cavity (11) and located below the pulse region (212). The drive member (31) is connected to the pulse member (32) so that the pulse member (32) can abut against the positive electrode in the pulse region (212) and apply a pulse current to the positive electrode in the pulse region (212).

2. The continuous recovery device for pulse discharge positive electrode based on directional circulation according to claim 1, characterized in that, The clamp (22) includes a base (221), a fixing plate (222), an elastic element (223), and a clamping plate (224). The base (221) is disposed on the conveyor line (21). Two fixing plates (222) are disposed on the base (221) at intervals along a first direction. The elastic element (223) is disposed on the fixing plate (222). One end of the elastic element (223) away from the fixing plate (222) is connected to the clamping plate (224). The clamping plate (224) and the fixing plate (222) are spaced apart to form a fixing position (225) for clamping the positive electrode sheet. Both ends of the positive electrode sheet along the first direction are clamped in the two fixing positions (225).

3. The continuous recovery device for pulse discharge positive electrode plates based on directional circulation according to claim 2, characterized in that, The pulse device (32) includes a positive electrode post (321) and a negative electrode post (322) spaced apart along the first direction. The two clamping plates (224) are respectively provided with a first hole (2241) corresponding to the positive electrode post (321) and the negative electrode post (322) and communicating with the fixing position (225). The positive electrode post (321) and the negative electrode post (322) pass through the corresponding first hole (2241) and abut against the two ends of the positive electrode plate.

4. The continuous recovery device for pulse discharge positive electrode plate based on directional circulation according to claim 3, characterized in that, The diameter of the first hole (2241) gradually decreases from the side away from the base (221) toward the side closer to the base (221); and / or, The fixing plate (222) is provided with a limiting groove (2221) for defining the position of the positive electrode plate; and / or, The clamp (224) is made of conductive material, and the pulse element (32) abuts against the clamp (224).

5. The continuous recovery device for pulsed discharge positive electrode plates based on directional circulation according to claim 3, characterized in that, Both the positive electrode post (321) and the negative electrode post (322) include a support part (3211), an elastic part (3212), and an abutment part (3213). Both support parts (3211) are disposed on the driving member (31). The abutment part (3213) is connected to the support part (3211) through the elastic part (3212). The elastic part (3212) always has the tendency to drive the abutment part (3213) to move toward the positive electrode plate.

6. The continuous recovery device for pulse discharge positive electrode plate based on directional circulation according to any one of claims 1-5, characterized in that, The conveyor line (21) includes a linkage roller (214) disposed in the pulse zone (212). The receiving cavity (11) has a first cavity wall (111) and a second cavity wall disposed opposite to the first cavity wall (111). One end of the linkage roller (214) is rotatably disposed on the first cavity wall (111), and the other end of the linkage roller (214) is spaced apart from the second cavity wall. The driving member (31) includes a guide member (311), a fixed seat (312), a mounting seat (313), and a connecting rod (314). The guide member (311) is disposed on the first cavity wall (111) and the second cavity wall, respectively. Each guide member (311) is provided with a guide groove (3111), and the length of the guide groove (3111) extends in the vertical direction. The two ends of the mounting seat (313) are respectively... The pulse element (32) is mounted on the mounting base (313) and the fixed base (312) is mounted on the side of the linkage roller (214) away from the first cavity wall (111). The rotation axes of the fixed base (312) and the linkage roller (214) are spaced apart. One end of the connecting rod (314) is hinged to the fixed base (312) and the other end of the connecting rod (314) is hinged to the mounting base (313). The conveyor line (21) drives the linkage roller (214) to rotate, thereby driving the fixed base (312) to make the connecting rod (314) drive the mounting base (313) to move along the guide groove (3111), so as to realize that the pulse element (32) and the positive electrode of the pulse area (212) abut or are spaced apart.

7. The continuous recovery device for pulse discharge positive electrode plate based on directional circulation according to any one of claims 1-5, characterized in that, The top of the reaction chamber (1) has an opening (12), the conveyor line (21) is at least partially located outside the opening (12), the feeding area (211) and the recycling area (213) are both located outside the opening (12), and the feeding area (211) and the recycling area (213) are spaced apart along a second direction.

8. The continuous recovery device for pulse discharge positive electrode based on directional circulation according to any one of claims 1-5, characterized in that, The reaction chamber (1) is provided with a discharge port (13) and a water inlet (14). The discharge port (13) is located at the bottom of the reaction chamber (1) and is used to discharge the positive electrode material. The water inlet (14) is used to replenish the reaction liquid in the reaction chamber (1).

9. The continuous recovery device for pulse discharge positive electrode plate based on directional circulation according to claim 8, characterized in that, It also includes a stirring assembly (4), which includes a motor (41), a rotating shaft (42) and stirring blades (43). The motor (41) is located below the reaction chamber (1). Part of the rotating shaft (42) extends through the bottom of the reaction chamber (1) into the receiving cavity (11). The stirring blades (43) are located on the outer periphery of the rotating shaft (42) in the receiving cavity (11). The motor (41) is connected to the rotating shaft (42) to drive the stirring blades (43) to rotate.

10. A method for continuous recovery of pulsed discharge positive electrode sheets, characterized in that, The method of the pulse discharge positive electrode continuous recovery device based on directional cycling according to any one of claims 1-9 includes the following steps: S10. Load the positive electrode sheet onto the clamp (22) of the loading area (211) of the conveyor line (21); S20, the conveyor line (21) moves the clamp (22) loaded with the positive electrode from the loading area (211) to the pulse area (212) so that the positive electrode is immersed in the reaction solution of the reaction tank (1); S30. After the positive electrode is transferred to the pulse region (212), the driving member (31) of the pulse mechanism (3) drives the pulse member (32) to rise so that the pulse member (32) abuts against the positive electrode. The pulse member (32) is energized to separate the current collector of the positive electrode from the positive electrode material. S40. After the current collector is separated from the positive electrode material, a portion of the positive electrode material actively disperses in the reaction solution. During the process of the current collector, which is still held on the clamp (22), being transferred from the pulse area (212) to the recovery area (213) by the conveyor line (21), another portion of the positive electrode material that is still attached to the current collector is knocked off by the reaction solution. S50, the current collector transferred to the recycling area (213) is removed from the clamp (22).

11. The method for continuous recovery of pulsed discharge positive electrode plates according to claim 10, characterized in that, The conveyor line (21) also provides a linkage roller (214) rotatably disposed in the pulse zone (212). The driving member (31) is a linkage member, and the pulse member (32) is slidably disposed on the side wall of the reaction tank (1), so that one end of the linkage member is hinged to the end face of the linkage roller (214), and the hinge point between the linkage member and the linkage roller (214) is spaced apart from the rotation axis of the linkage roller (214), and the other end is hinged to the pulse member (32). During steps S20 to S40, the conveyor line (21) drives the linkage roller (214) to rotate, so that the linkage component synchronously drives the pulse component (32) to contact or space from the positive electrode sheet.

12. The method for continuous recovery of pulsed discharge positive electrode plates according to claim 10, characterized in that, Following step S50, step S60 is also included: The reaction tank (1) is provided with a discharge port (13) and a water inlet (14). The discharge port (13) is opened to discharge the positive electrode material deposited at the bottom of the reaction tank (1) and the reaction liquid can be replenished at the water inlet (14).

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