DRT-based high-voltage pulse separation and recovery device for positive electrode plate and treatment method

Abstract

Disclosed in the present application is a DRT-based high-voltage pulse separation and recovery device for a positive electrode plate and a treatment method. The DRT-based high-voltage pulse separation and recovery device for a positive electrode plate is sequentially provided with a storage area, a feeding area, a treatment area, and a recovery area, wherein a first conveying mechanism is provided in the feeding area, a feeding mechanism is provided between the storage area and the feeding area and is able to place a positive electrode plate in the storage area on the first conveying mechanism, a reaction tank having a top opening and filled with a solution is provided in the treatment area, a base is provided in the reaction tank and part of the base extends through the opening and is located outside the reaction tank, and the first conveying mechanism can convey the positive electrode plate to the base to realize automatic feeding; a pressing plate and an energization portion are provided above the reaction tank, the pressing plate is lower to enable the energization portion to abut against the positive electrode plate and presses the base into the solution, so as to apply a pulsed current to a current collector in the solution to disperse a positive electrode material into the solution; and a second conveying mechanism is provided on the base, and the second conveying mechanism can convey the current collector to the recovery area, realizing separation and recovery of the positive electrode plate.

Description

High-voltage pulse separation and recovery device and processing method for positive electrode sheets based on DRT Technical Field

[0001] The present application relates to the technical field of battery positive electrode sheet recycling and processing, for example, to a DRT-based high-voltage pulse separation and recycling positive electrode sheet device and processing method. Background Art

[0002] With the development of new energy technologies, the demand for batteries has surged. However, due to their short lifespan, the number of discarded batteries has also increased dramatically. Simply discarding discarded batteries pollutes the environment. However, metals such as nickel, cobalt, manganese, lithium, iron, copper, and aluminum in discarded batteries have high recycling value, so discarded batteries are recycled.

[0003] In the prior art, recycling of discarded battery positive electrodes typically involves using a pulse discharge device to separate the current collector from the positive electrode material. However, current pulse discharge devices primarily rely on manual loading and are unable to automatically separate and recycle the positive electrodes, resulting in low production efficiency.

[0004] Summary of the Invention

[0005] The embodiment of the present application provides a DRT-based high-voltage pulse separation and recovery device and processing method for positive electrode sheets, which can realize continuous and automatic separation and recovery of positive electrode sheets with high degree of automation and high efficiency.

[0006] In the first aspect, a high-voltage pulse separation and recovery device for positive electrode sheets based on DRT is provided, which is sequentially provided with a storage area, a loading area, a processing area and a recovery area; the storage area is provided for storing positive electrode sheets to be processed, the loading area is provided with a first conveying mechanism, a loading mechanism is provided between the storage area and the loading area, the loading mechanism is provided for placing the positive electrode sheets on the first conveying mechanism, the processing area is provided with a reaction box with a top opening, a liftable base is provided in the reaction box, and part of the base passes through the opening and is located outside the reaction box, and the first conveying mechanism is capable of lifting the positive electrode sheets. The positive electrode sheet is transported to the base; the reaction box is filled with a solution, and a pulse discharge module is arranged above the reaction box. The pulse discharge module includes a liftable pressure plate and a power-carrying part installed on the pressure plate. The lowering of the pressure plate can make the power-carrying part abut against the positive electrode sheet and press the base into the solution to apply a pulse current to the positive electrode sheet in the solution, so that the positive electrode material separated from the positive electrode sheet is dispersed in the solution; a second conveying mechanism is provided on the base, and the second conveying mechanism is configured to convey the current collector of the separated positive electrode sheet to the recovery area.

[0007] As an optional solution for a high-voltage pulse separation and recovery device for positive electrode sheets based on DRT, the loading area is provided with a material tray, the material tray is provided with a positioning groove for placing the positive electrode sheet, and the base is provided with a positioning structure, and the positioning structure is configured to align the positioning groove with the power-carrying part.

[0008] As an optional solution for a high-voltage pulse separation and recovery device for positive electrode sheets based on DRT, the positioning structure includes a positioning member and a guide roller. A mounting groove is provided at the front end of the top surface of the base along the conveying direction of the first conveying mechanism. The positioning member can be raised and lowered in the mounting groove. When the material tray is conveyed to the base, at least part of the positioning member can rise outside the mounting groove and limit the movement of the material tray. Two rows of guide rollers are provided at intervals on the top surface of the base along the conveying direction perpendicular to the first conveying mechanism. The two rows of guide rollers are arranged to roll against the two side surfaces of the material tray perpendicular to its own moving direction.

[0009] As an optional solution for the DRT-based high-voltage pulse separation and recovery device for positive electrode sheets, the bottom of the positioning groove is configured as a grid structure, and the solution can penetrate into the positioning groove through the grid structure.

[0010] As an optional solution for a high-voltage pulse separation and recovery device for positive electrode sheets based on DRT, the base is connected to the inner bottom wall of the reaction box through retractable legs, and an elastic member is sleeved on the outer side of the legs. The elastic member is arranged between the base and the inner bottom wall of the reaction box, and the elastic member can drive the base to reset upward after the pressure is reduced.

[0011] As an optional solution for a high-voltage pulse separation and recovery device for positive electrode sheets based on DRT, the recovery area is provided with a recovery box with an open top, a rotating seat is provided above the recovery box, the second conveying mechanism conveys the material tray to the rotating seat, a fixing mechanism is provided on the rotating seat, and the fixing mechanism is configured to restrict the material tray on the rotating seat, the rotating seat is connected to a flipping mechanism, and the flipping mechanism can drive the rotating seat to flip so as to pour the current collector of the positive electrode sheet into the recovery box.

[0012] As an optional solution for the DRT-based high-voltage pulse separation and recovery device for positive electrode sheets, a third conveying mechanism is provided on the rotating seat, and the third conveying mechanism is connected to the first conveying mechanism. The third conveying mechanism can convey the material tray to the second conveying mechanism.

[0013] As an optional solution for a high-voltage pulse separation and recovery device for positive electrode sheets based on DRT, the fixing mechanism includes a clamping plate and a driving member. The clamping plate is arranged on the inner side wall of the rotating seat and is spaced apart from the inner bottom wall of the rotating seat. A space for accommodating the material tray is formed between the clamping plate and the rotating seat. The driving member is connected to the clamping plate, and the driving member can drive the clamping plate to move in a vertical direction and press against the material tray.

[0014] As an optional solution for a high-voltage pulse separation and recovery device for positive electrode sheets based on DRT, a cleaning area is provided between the processing area and the recovery area, and a fourth conveying mechanism is provided in the cleaning area. The fourth conveying mechanism is configured to convey the positive electrode sheets from the processing area to the recovery area. A cleaning component and a drying component are provided above the fourth conveying mechanism, and the cleaning component includes a first nozzle for spraying cleaning liquid, and the drying component includes a second nozzle for blowing air. The first nozzle and the second nozzle are arranged in sequence along the conveying direction of the fourth conveying mechanism and face the fourth conveying mechanism.

[0015] As an optional solution for a high-voltage pulse separation and recovery device for positive electrode sheets based on DRT, a transition zone is provided between the cleaning zone and the treatment zone, and a first water collecting tank is provided in the transition zone. The first water collecting tank is connected to the reaction tank through a pipeline, and a fifth conveying mechanism is provided above the first water collecting tank. The fifth conveying mechanism is configured to convey the material tray from the treatment zone to the cleaning zone, and a drainage portion is provided on the fifth conveying mechanism, and the solution attached to the positive electrode sheet can drip into the first water collecting tank through the drainage portion.

[0016] As an optional solution for a high-voltage pulse separation and recovery device for positive electrode sheets based on DRT, the loading mechanism includes a suction cup assembly, a first moving assembly and a second moving assembly. The first moving assembly is connected to the suction cup assembly to drive the suction cup assembly to move up and down, and the second moving assembly is connected to the first moving assembly to drive the first moving assembly to move back and forth between the storage area and the loading area.

[0017] In a second aspect, a method for separating and recovering positive electrode sheets using a high-voltage pulse method is provided, wherein the positive electrode sheets are separated and recovered using the DRT-based high-voltage pulse method. The method comprises the following steps:

[0018] Step S100: The loading mechanism transfers the cathode sheets to be processed in the storage area to the first conveying mechanism in the loading area, and then the first conveying mechanism conveys the cathode sheets to the base in the processing area;

[0019] Step S200: After the positive electrode sheet is transported to the base, the pressing plate of the pulse discharge module is lowered so that the conducting portion contacts the positive electrode sheet, and the positive electrode sheet and the base are pressed together into the solution in the reaction box;

[0020] Step S300: After the positive electrode sheet is completely immersed in the solution, the energizing unit is energized to apply a pulse current to the positive electrode sheet to separate the positive electrode material of the positive electrode sheet from the current collector;

[0021] Step S400: After separation, the pressing plate rises and moves away from the base, causing the base to rise and reset, and the second conveying mechanism conveys the current collector to the recovery area for recovery.

[0022] As an optional solution to the method of high-voltage pulse separation and recovery of positive electrode sheets, in step S400, the current collector is cleaned and dried during the process of moving the current collector from the processing area to the recovery area.

[0023] As an optional solution to the method of high-voltage pulse separation and recovery of positive electrode sheets, the first conveying mechanism conveys a material tray, and the base is provided with a positioning structure;

[0024] In the step S100, the loading mechanism positions and places the positive electrode sheet on the material tray, and the first conveying mechanism conveys the material tray and the positive electrode sheet to the base together;

[0025] In the step S200 , during the process of transporting the material tray to the base, the positioning structure blocks and positions the material tray so that the positive electrode sheet on the material tray is aligned with the conducting portion.

[0026] As an optional solution for the method of high-voltage pulse separation and recovery of positive electrode sheets, the recovery area is provided with a recovery box with an open top, a rotating base is provided above the recovery box, and the rotating base is provided with a fixing mechanism and a third conveying mechanism connected to the first conveying mechanism;

[0027] In the step S400, the second conveying mechanism conveys the material tray to the rotating seat, and then the fixing mechanism presses against the material tray to restrict the material tray on the rotating seat;

[0028] The rotating seat is turned over, and the collector on the material tray is poured into the recovery box for recycling. Then the rotating seat is turned over and reset, and the fixing mechanism is away from the material tray. The third conveying mechanism conveys the material tray to the first conveying mechanism for recycling.

[0029] The beneficial effects of the present application are as follows: by setting up a loading mechanism and a first conveying mechanism, the two can cooperate with each other to realize automatic loading of the positive electrode sheet; after loading, the pressing plate can be lowered so that the power-carrying part is against the current collector of the positive electrode sheet, and the base and the positive electrode sheet are pressed into the solution in the reaction box together, and then the power-carrying part is energized, which can apply a high-voltage pulse current to the current collector to vaporize the positive electrode material to separate the current collector and the positive electrode material. Since the positive electrode sheet is immersed in the solution for pulse discharge treatment, the vaporized small particles of positive electrode material can be dispersed in the solution and are difficult to enter the air, thereby avoiding the vaporized small particles of positive electrode material drifting away with the air, which helps to improve the recovery rate of the positive electrode material; after the positive electrode material is separated, the pressing plate rises and resets, so that the base can rise and reset to lift the current collector and take it out of the solution, and the second conveying mechanism can convey the current collector to the recovery area for recovery, thereby realizing the separation and recovery of the current collector and the positive electrode material of the positive electrode sheet. Compared with related technologies, the DRT-based high-voltage pulse separation and recovery positive electrode sheet device of this application can continuously and automatically load and pulse discharge the positive electrode sheets, has a high degree of automation, and can realize continuous and automatic separation and recovery of the positive electrode sheets with high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present application will be described below with reference to the accompanying drawings and embodiments.

[0031] FIG1 is a schematic structural diagram of a DRT-based high-voltage pulse separation and recovery device for positive electrode sheets according to an embodiment of the present application;

[0032] FIG2 is a three-dimensional view of a device for separating and recovering positive electrode sheets using a high-voltage pulse method based on DRT according to the present application;

[0033] FIG3 is a three-dimensional view of a material tray according to an embodiment of the present application;

[0034] FIG4 is a three-dimensional view of a base according to an embodiment of the present application;

[0035] FIG5 is a schematic diagram of the assembly of the rotating seat, the flipping mechanism and the positioning mechanism according to an embodiment of the present application.

[0036] In the picture:

[0037] 100, storage area; 200, loading area; 300, processing area; 400, recycling area; 500, cleaning area; 600, transition area; 700, positive electrode sheet;

[0038] 1. Material tray; 101. Positioning slot; 102. Grid structure; 2. First conveying mechanism; 3. Loading mechanism; 301. Suction cup assembly; 302. First moving assembly; 303. Second moving assembly; 4. Reaction box; 5. Base; 6. Pulse discharge module; 601. Pressing plate; 602. Power supply unit; 7. Second conveying mechanism; 8. Positioning structure; 801. Positioning member; 802. Guide roller; 9. Support leg; 10. Elastic member; 11. Recovery box; 12. Rotating seat; 121, second rotating shaft; 13, fixing mechanism; 131, clamping plate; 132, driving member; 14, flipping mechanism; 141, driving motor; 142, driving gear; 143, first rotating shaft; 144, teeth; 145, synchronous belt; 15, third conveying mechanism; 16, fourth conveying mechanism; 17, first nozzle; 18, second nozzle; 19, first water collecting tank; 20, fifth conveying mechanism; 21, second water collecting tank; 22, storage platform. DETAILED DESCRIPTION

[0039] The following describes the embodiments of the present application in conjunction with the accompanying drawings. The embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of this application.

[0040] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. A person of ordinary skill in the art will be able to understand the meaning of the above terms in this application according to the circumstances.

[0041] Directional Recycling Technology (DRT) is a technology based on reverse product positioning design. It uses short-range recycling processes to recycle spent materials from retired products into usable materials for production. In the field of power batteries, directed recycling refers to the process of converting used batteries into the materials needed for power battery manufacturing through pre-treatment, hydrometallurgy, and other processes. Manufacturers can directly use the processed battery raw materials to produce high-quality power batteries.

[0042] Currently, the positive electrode material and current collector of the positive electrode sheet can be separated and recycled through pulse discharge treatment. The pulse discharge treatment process involves applying a high-voltage pulse current to the current collector, which can instantly generate a large amount of heat in the current collector, causing the positive electrode material on the current collector to vaporize, simultaneously generating a breakdown and forming a plasma, which causes the positive electrode material to form small particles and separate from the current collector. Both the positive electrode material and the current collector formed into small particles can be recycled and reused.

[0043] 1 and 2 , the present application provides a DRT-based high-voltage pulse separation and recovery device for positive electrode sheets, which is sequentially provided with a storage area 100 , a loading area 200 , a processing area 300 and a recovery area 400 .

[0044] The storage area 100 is provided with a storage platform 22, which is configured to store the positive electrode sheet 700 to be processed. The loading area 200 is provided with a first conveying mechanism 2. A loading mechanism 3 is provided between the storage area 100 and the loading area 200. The loading mechanism 3 can place the positive electrode sheet 700 on the first conveying mechanism 2; the processing area 300 is provided with a reaction box 4 with a top opening, the reaction box 4 is filled with a solution, and a liftable base 5 is provided in the reaction box 4, and part of the base 5 passes through the opening and is located outside the reaction box 4. The first conveying mechanism 2 can convey the positive electrode sheet 700. to the base 5; a pulse discharge module 6 is provided above the reaction box 4, and the pulse discharge module 6 includes a liftable pressure plate 601 and a power-carrying part 602 installed on the pressure plate 601. When the pressure plate 601 is lowered, the power-carrying part 602 can abut against the positive electrode sheet 700, and press the base 5 into the solution to apply a pulse current to the positive electrode sheet 700 in the solution, so that the positive electrode material separated from the positive electrode sheet 700 is dispersed in the solution; a second conveying mechanism 7 is provided on the base 5, and the second conveying mechanism 7 is configured to convey the collector of the positive electrode sheet 700 after separation to the recovery area 400.

[0045] It is understandable that by setting the feeding mechanism 3 and the first conveying mechanism 2, the two cooperate to realize the automatic feeding of the positive electrode sheet 700; after feeding, the pressing plate 601 can be lowered to make the power-carrying part 602 rest on the current collector of the positive electrode sheet 700, and press the base 5 and the positive electrode sheet 700 together into the solution in the reaction box 4, and then the power-carrying part 602 is energized, which can apply a high-voltage pulse current to the current collector to vaporize the positive electrode material to separate the current collector and the positive electrode material. Since the positive electrode sheet 700 is immersed in the solution for pulse discharge treatment, the positive electrode sheet 700 is automatically fed to the positive electrode sheet 700. The vaporized small particles of positive electrode material can be dispersed in the solution and are difficult to enter the air. The solution is used to collect the vaporized positive electrode material, thereby preventing the vaporized positive electrode material from floating away with the air, which helps to improve the recovery rate of the positive electrode material. After the positive electrode material is separated, the pressing plate 601 rises and resets, so that the base 5 can rise and reset to lift the collector and take it out of the solution. The second conveying mechanism 7 can convey the collector to the recovery area 400 for recycling, thereby realizing the separation and recovery of the collector and the positive electrode material of the positive electrode sheet 700. This design can continuously and automatically load and pulse discharge the positive electrode sheet 700, with a high degree of automation. Therefore, the DRT-based high-voltage pulse separation and recovery positive electrode sheet device of the present application can continuously and automatically separate and recycle the positive electrode sheet 700 with high efficiency.

[0046] Optionally, the solution may be a coolant (such as water), which can be used to collect the vaporized positive electrode material and quickly cool the vaporized positive electrode material.

[0047] In some embodiments, the DRT-based high-voltage pulse separation and recovery apparatus for cathode sheets further includes a controller, to which the loading mechanism 3, the first conveying mechanism 2, and the second conveying mechanism 7 are connected. The controller can control the loading mechanism 3, the first conveying mechanism 2, and the second conveying mechanism 7 to work in coordination, thereby streamlining the entire processing flow.

[0048] 1 and 2 , the loading mechanism 3 includes a suction cup assembly 301, a first moving assembly 302, and a second moving assembly 303. The first moving assembly 302 is connected to the suction cup assembly 301 to drive the suction cup assembly 301 to move up and down, and the second moving assembly 303 is connected to the first moving assembly 302 to drive the first moving assembly 302 to move back and forth between the storage area 100 and the loading area 200. For example, the suction cup assembly 301 can adopt an electric suction cup structure, the first moving assembly 302 can adopt an electric slide mechanism, and the second moving assembly 303 can adopt a lifting cylinder. The lifting cylinder is slidably arranged on the electric slide mechanism, and the output end of the lifting cylinder is connected to the suction cup assembly 301. The electric slide mechanism can drive the lifting cylinder and the suction cup assembly 301 to move back and forth between the storage area 100 and the loading area 200. The lifting cylinder can drive the suction cup assembly 301 to move up and down to automatically suck or release the positive electrode sheet 700, thereby realizing automatic loading of the positive electrode sheet 700.

[0049] In this embodiment, referring to Figures 1 to 4, the loading area 200 is provided with a material tray 1, and a positioning groove 101 is provided on the material tray 1. The loading mechanism 3 can place the positive electrode sheet 700 of the storage area 100 in the positioning groove 101. The positioning groove 101 restricts the movement of the positive electrode sheet 700 relative to the material tray 1 to position the positive electrode sheet 700 on the material tray 1; after the positive electrode sheet 700 is placed on the material tray 1, the first conveying mechanism 2 conveys the material tray 1 and the positive electrode sheet 700 together to the base 5. A positioning structure 8 is provided on the base 5. The positioning structure 8 can prevent the positioning material tray 1 from moving so that the positioning groove 101 is aligned with the power-carrying part 602. The pressing plate 601 descends to abut against the material tray 1 and press the material tray 1 and the base 5 into the solution. At the same time, it can ensure that the power-carrying part 602 accurately abuts against the positive electrode sheet 700 in the positioning groove 101, preventing the positive electrode sheet 700 from floating in the solution, and ensuring that the power-carrying part 602 can apply a pulse current to the positive electrode sheet 700.

[0050] Optionally, as shown in FIG3 , the tray 1 is provided with a plurality of parallel positioning slots 101, each of which can be used to place a positive electrode sheet 700. The pressing plate 601 is correspondingly provided with a plurality of sets of power supply portions 602, each of which can apply a pulse current to the positive electrode sheet 700 in a positioning slot 101. This design enables the separation and recycling of multiple positive electrode sheets 700 at the same time, resulting in higher processing efficiency.

[0051] In some embodiments, as shown in Figure 3, the bottom of the positioning groove 101 is set to a grid structure 102, which can support the positive electrode sheet 700. At the same time, during the pulse discharge treatment process, the solution can penetrate through the grid structure 102 into the positioning groove 101 to ensure that the solution is in full contact with the positive electrode sheet 700.

[0052] Optionally, as shown in FIG4 , the positioning mechanism includes a positioning member 801 and a guide roller 802 . A mounting groove is provided on the top surface of the base 5 at the front end along the conveying direction of the first conveying mechanism 2 . The positioning member 801 can be raised and lowered in the mounting groove to selectively extend outside the mounting groove and limit the movement of the material tray 1 . For example, a driving mechanism (such as a lifting cylinder or a motor, etc.) is provided in the mounting groove. The driving mechanism is connected to the controller. The driving mechanism can drive the positioning member 801 to move up and down, so that the positioning member 801 has an ascending position and a descending position. When the positioning member 801 is in the ascending position, at least part of the positioning member 801 is outside the mounting groove; when the positioning member 801 is in the descending position, the positioning member 801 is completely retracted into the mounting groove. Two rows of guide rollers 802 are provided on the top surface of the base 5 along the conveying direction perpendicular to the first conveying mechanism 2 . Each row of guide rollers 802 includes at least one guide roller 802 . The length of each row of guide rollers 802 extends along the conveying direction of the second conveying mechanism 7 .

[0053] It is understandable that the positioning member 801 and the two rows of guide rollers 802 are arranged on the base 5 and form a positioning space for accommodating the material tray 1. The positioning space is aligned with the pressure plate 601. The positioning space is formed with an entry opening for the material tray 1 at the rear end along the conveying direction of the first conveying mechanism 2. The material tray 1 can pass through the opening and enter the positioning space. During the process of the first conveying mechanism 2 conveying the material tray 1 to the positioning space on the base 5, the two rows of guide rollers 802 can respectively roll against the two opposite sides of the material tray 1 perpendicular to its own moving direction to limit the moving direction of the material tray 1 and prevent the material tray 1 from deviating. At the same time, the positioning member 801 is in the raised position. After the material tray 1 moves into place, the positioning member 801 can stop the material tray 1 from continuing to move, and the material tray 1 is precisely positioned in the positioning space, so that the pressure plate 601 is aligned with the material tray 1, and the power supply portion 602 is aligned with the positioning groove 101, thereby ensuring that the power supply portion 602 is accurately aligned with the positive electrode sheet 700 in the positioning groove 101. After the positive electrode sheet 700 completes the pulse discharge process and before the second conveying mechanism 7 conveys the material tray 1 , the positioning member 801 is located in a lowered position to avoid interfering with the conveying of the material tray 1 .

[0054] Optionally, referring to FIG1 , the base 5 is connected to the inner bottom wall of the reaction chamber 4 via retractable legs 9, and an elastic member 10 is sleeved on the outer side of the legs 9. The elastic member 10 is disposed between the base 5 and the inner bottom wall of the reaction chamber 4. The elastic member 10 can drive the base 5 to reset upward after the pressure is reduced. During the pulse discharge treatment, the pressing plate 601 descends to support the material tray 1 and overcome the elastic force of the elastic member 10, driving the material tray 1 and the base 5 to descend and immerse them in the solution. After the pulse discharge treatment is completed, the pressing plate 601 rises and resets away from the material tray 1 and the base 5 to remove the pressure on the base 5. Under the action of the elastic member 10, the base 5 can automatically rise and reset.

[0055] For example, the elastic member 10 may be a spring.

[0056] In some embodiments, a hydraulic buffer is further provided in the legs 9. The hydraulic buffer can use hydraulic damping to buffer and decelerate the telescopic movement of the legs to a stop, providing a certain degree of protection, allowing the base 5 to rise smoothly and preventing the tray 1 from falling off the base 5 due to inertia, thereby avoiding safety accidents or damage to the device.

[0057] Optionally, referring to FIG1 , the pressing plate 601 is connected to a lifting mechanism, which may be a lifting cylinder to drive the pressing plate 601 to move upward. For example, a power supply circuit board is integrated on the pressing plate 601, and the pulse discharge mechanism further includes a pulse discharge body, which is arranged on a side of the pressing plate 601 away from the power supply portion 602. The power supply circuit board is connected to the pulse discharge body to provide electrical energy to the pulse discharge body, and the power supply portion 602 is connected to the pulse discharge body. The power supply portion 602 includes a positive power supply portion 602 and a negative power supply portion 602. The positive power supply portion 602 and the negative power supply portion 602 can simultaneously rest on the current collector of the positive electrode sheet 700 to form a power supply circuit, so that the pulse current can flow through the current collector.

[0058] In this embodiment, referring to Figures 1 and 5, the recycling area 400 is provided with a recycling box 11 with an open top, and a rotating seat 12 is provided above the recycling box 11. The second conveying mechanism 7 can convey the material tray 1 to the rotating seat 12. The rotating seat 12 is provided with a fixing mechanism 13. When the material tray 1 is conveyed to the rotating seat 12, the fixing mechanism 13 can restrict the material tray 1 on the rotating seat 12 to prevent the material tray 1 from moving relative to the rotating seat 12. The rotating seat 12 is connected to a flipping mechanism 14. The flipping mechanism 14 can drive the rotating seat 12 to flip so as to pour the collector of the positive electrode sheet 700 into the recycling box 11, thereby realizing automatic recovery of the collector.

[0059] 5 , the recycling area 400 is provided with a support frame, and the recycling box 11 is provided on the top surface of the support frame. The flipping mechanism 14 includes a driving motor 141, which is connected to the controller. The output end of the driving motor 141 is provided with a driving gear 142. The support frame has two opposite side plates, and both side plates are rotatably provided with a first rotating shaft 143. The first rotating shaft 143 is partially located on the inner side of the support frame and is provided with teeth 144 that mesh with the driving gear 142. The first rotating shaft 143 is partially located on the outer side of the support frame. The rotating seat 12 is a "U"-shaped mechanism. The rotating seat 12 is rotatably connected to the external fixed platform through the second rotating shaft 121 on both relative outer sides. A synchronous belt 145 is connected between the first rotating shaft 143 and the second rotating shaft 121. The controller can control the driving motor 141 to drive the driving gear 142 to rotate, and drive the first rotating shaft 143 to rotate, thereby linking the synchronous belt 145 to drive the second rotating shaft 121 to rotate, thereby realizing automatic flipping of the rotating seat 12.

[0060] Of course, in other embodiments, the driving motor 141 may be fixedly disposed on an external fixed platform, and the output end of the driving motor 141 is connected to the outer side surface of the rotating base 12 to directly drive the rotation and flipping.

[0061] Optionally, referring to Figure 5, the fixing mechanism 13 includes a clamping plate 131 and a driving member 132. The clamping plate 131 is arranged on the inner side wall of the rotating seat 12 and is spaced apart from the inner bottom wall of the rotating seat 12. A space for accommodating the material tray 1 is formed between the clamping plate 131 and the rotating seat 12. The material tray 1 can be transported into the space. The driving member 132 is connected to the clamping plate 131, and the controller is connected to the driving member 132. The controller can control the driving member 132 to drive the clamping plate 131 to move in the vertical direction to selectively press the material tray 1 against the rotating seat 12.

[0062] For example, referring to Figures 2 and 5, a third conveying mechanism 15 is provided on the rotating seat 12, and the third conveying mechanism 15 is connected to the second conveying mechanism 7. After the collector on the tray 1 is poured into the recovery box 11, the flipping mechanism 14 can drive the rotating seat to reset, and then the clamping plate 131 rises away from the tray 1, and the third conveying mechanism 15 can convey the empty tray 1 to the second conveying mechanism 7 again to recycle the tray 1.

[0063] Optionally, referring to Figures 1 and 2, a cleaning area 500 is provided between the processing area 300 and the recovery area 400. The cleaning area 500 is provided with a fourth conveying mechanism 16. The fourth conveying mechanism 16 is configured to convey the positive electrode sheet 700 from the processing area 300 to the recovery area 400. A mounting seat is provided above the fourth conveying mechanism 16. A cleaning assembly and a drying assembly are provided on the mounting seat. The cleaning assembly includes a first nozzle 17 for spraying a cleaning liquid (such as water). The drying assembly includes an air-drying body and a second nozzle 18 for blowing air. The first nozzle 17 and the second nozzle 18 are sequentially arranged along the conveying direction of the fourth conveying mechanism 16 and are directly opposite the fourth conveying mechanism 16. By providing the cleaning assembly, the first nozzle 17 can be used to spray the cleaning liquid to rinse the solution and positive electrode material attached to the material tray 1 and the current collector during the conveying process of the material tray 1, which helps to improve the separation effect. In addition, by providing the drying assembly, the cleaned material tray 1 and the current collector can be air-dried by the second nozzle 18 to ensure the recovery of the dried current collector.

[0064] In some embodiments, the length of the fourth conveying mechanism 16 can be designed to be long enough to ensure cleaning and drying effects.

[0065] It should be noted that the cleaning component can adopt the cleaning structure of the existing structure. For example, the cleaning component also includes a water pump and a pipe. The first end of the pipe is connected to the box for storing the cleaning liquid, and the second end of the pipe is connected to the water pump and the first nozzle 17 in sequence. The first nozzle 17 can clean the liquid through the water pump; the air-drying body can adopt the fan of the existing structure, and an air duct connecting the fan and the second nozzle 18 is provided on the mounting base, and the fan can blow out air from the second nozzle 18.

[0066] In some embodiments, the cleaning liquid and the solution are not the same liquid, and the cleaning liquid cannot be directly recovered into the reaction box 4. Referring to Figure 1, optionally, a transition zone 600 is provided between the cleaning zone 500 and the treatment zone 300. The transition zone 600 is provided with a first water collecting tank 19, which is connected to the reaction box 4 through a pipeline. A fifth conveying mechanism 20 is provided above the first water collecting tank 19. The fifth conveying mechanism 20 is configured to convey the material tray 1 from the treatment zone 300 to the cleaning zone 500. The fifth conveying mechanism 20 is provided with a hollow drain portion. The solution attached to the material tray 1 and the positive electrode sheet 700 can drip into the first water collecting tank 19 through the drain portion, so that the solution attached to the positive electrode sheet 700 of the material tray 1 and the positive electrode material in the solution can be recovered into the reaction box 4, which helps to improve the recovery rate of the positive electrode material.

[0067] In other embodiments, continuing with reference to FIG1 , the solution and the cleaning liquid may be the same liquid (e.g., water), a second water collecting tank 21 is provided below the fourth conveying mechanism 16, and the second water collecting tank 21 is connected to the reaction tank 4 through a pipeline, and a hollow portion is provided on the fourth conveying mechanism 16. During cleaning, the cleaning liquid can drip from the hollow portion into the second water collecting tank 21 and be recovered into the reaction tank 4, so as to recover the positive electrode material in the cleaning liquid into the reaction tank 4, which helps to improve the recovery rate of the positive electrode material.

[0068] 2 , for example, the first conveying mechanism 2 , the second conveying mechanism 7 , the fifth conveying mechanism 20 , the fourth conveying mechanism 16 , and the third conveying mechanism 15 may all employ roller conveyors of related art. In some embodiments, a gap is provided between two adjacent rollers on the roller conveyor. The gap in the fifth conveying mechanism 20 serves as a drain portion, and the gap in the fourth conveying mechanism 16 serves as a hollow portion.

[0069] 2 , optionally, the first conveying mechanism 2, the second conveying mechanism 7, the fifth conveying mechanism 20, the fourth conveying mechanism 16, and the third conveying mechanism 15 are sequentially connected end to end to facilitate continuous and smooth conveyance of the material tray 1. It should be noted that the term "connected end to end" here means that two adjacent conveying mechanisms are aligned and spaced apart, rather than being fixedly connected. Therefore, the second conveying mechanism 7 can be raised and lowered with the base 5, and the third conveying mechanism 15 can be rotated with the rotating base 12.

[0070] The present application also provides a method for separating and recovering positive electrode sheets using high-voltage pulses, using any of the above embodiments of the DRT-based high-voltage pulse separation and recovery apparatus for recovering positive electrode sheets to continuously and automatically separate and recover positive electrode sheets 700, thereby improving the separation and recovery efficiency of positive electrode sheets 700. The method for separating and recovering positive electrode sheets using high-voltage pulses includes the following steps:

[0071] Step S100: The loading mechanism 3 transfers the cathode sheets 700 to be processed in the storage area 100 to the first conveying mechanism 2 in the loading area 200. The first conveying mechanism 2 then conveys the cathode sheets 700 to the base 5 in the processing area 300 to achieve continuous automatic loading.

[0072] Step S200: After the positive electrode sheet 700 is transported to the base 5, the pressing plate 601 of the pulse discharge module 6 is lowered so that the conducting portion 602 abuts against the positive electrode sheet 700, and the positive electrode sheet 700 and the base 5 are pressed together into the solution in the reaction box 4;

[0073] Step S300: After the positive electrode sheet 700 is completely immersed in the solution, the power supply unit 602 is energized to apply a pulse current to the current collector of the positive electrode sheet 700 to separate the positive electrode material of the positive electrode sheet 700 from the current collector; after the positive electrode material is separated, it is dispersed in the solution for easy recovery;

[0074] Step S400: After separation, the pressing plate 601 rises and moves away from the base 5, causing the base 5 to rise and reset to remove the current collector. The second conveying mechanism 7 conveys the current collector to the recovery area 400 for recovery.

[0075] In the above method, the loading mechanism 3 and the first conveying mechanism 2 cooperate to realize continuous automatic loading, and can realize continuous and automatic separation and recovery of the positive electrode sheets 700.

[0076] Please refer to Figures 1 and 2. When the DRT-based high-voltage pulse separation and recovery device for positive electrode sheets in the aforementioned technical solution is used, the DRT-based high-voltage pulse separation and recovery device for positive electrode sheets further includes a cleaning area 500, which is provided with a cleaning component and a drying component.

[0077] Correspondingly, in step S400, during the process of moving the current collector from the processing area 300 to the recovery area 400, the current collector is cleaned using a cleaning component and air-dried using a drying component to rinse the solution attached to the current collector and the positive electrode material in the solution and then dry it to improve the separation effect of the positive electrode material and the current collector.

[0078] Please refer to Figure 1 and Figure 2. When the high-voltage pulse separation and recovery device for positive electrode sheets based on DRT in the above technical solution is used, the first conveying mechanism 2 conveys a material tray 1, and a positioning structure 8 is provided on the base 5;

[0079] Correspondingly, in step S100, the loading mechanism 3 positions and places the positive electrode sheet 700 on the tray 1, and the first conveying mechanism 2 conveys the tray 1 and the positive electrode sheet 700 to the base 5.

[0080] In step S200 , during the process of conveying the material tray 1 to the base 5 , the positioning structure 8 blocks and positions the material tray 1 so that the positive electrode sheet 700 on the material tray 1 is aligned with the power-carrying part 602 , ensuring that the power-carrying part 602 can be accurately connected to the positive electrode sheet 700 .

[0081] Optionally, referring to FIG1 and FIG5 , when the DRT-based high-voltage pulse separation and recovery device for positive electrode sheets is used as in the aforementioned technical solution, the recovery area 400 is provided with a recovery box 11 with an open top, a rotating base 12 is provided above the recovery box 11, and the rotating base 12 is provided with a fixing mechanism 13 and a third conveying mechanism 15 connected to the first conveying mechanism 2;

[0082] Correspondingly, in step S400, the second conveying mechanism 7 conveys the material tray 1 to the rotating seat 12, and then the fixing mechanism 13 presses against the material tray 1 to restrict the material tray 1 on the rotating seat 12 to prevent the material tray 1 from moving relative to the rotating seat 12;

[0083] The rotating seat 12 is flipped over, and the collector on the tray 1 is poured into the recovery box 11 for recovery. Then the rotating seat 12 is flipped over and reset, the fixing mechanism 13 is away from the tray 1, and the third conveying mechanism 15 conveys the tray 1 to the first conveying mechanism 2 for recycling.

[0084] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other positions or relationships are based on the positions or relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and do not have any special meaning.

[0085] Throughout this specification, references to terms such as "an embodiment" or "example" mean that the features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0086] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-voltage pulse separation and recovery device for positive electrode sheets based on DRT, which is provided with a storage area (100), a loading area (200), a processing area (300) and a recovery area (400) in sequence; The storage area (100) is configured to store positive electrode sheets (700) to be processed, the loading area (200) is provided with a first conveying mechanism (2), a loading mechanism (3) is provided between the storage area (100) and the loading area (200), the loading mechanism (3) is configured to place the positive electrode sheets (700) on the first conveying mechanism (2), the processing area (300) is provided with a reaction box (4) with a top opening, a liftable base (5) is provided in the reaction box (4), and at least a portion of the base (5) can pass through the opening and be located outside the reaction box (4), and the first conveying mechanism (2) can convey the positive electrode sheets (700) to the base (5); The reaction box (4) is filled with a solution, and a pulse discharge module (6) is arranged above the reaction box (4). The pulse discharge module (6) comprises a liftable pressing plate (601) and a power-carrying portion (602) mounted on the pressing plate (601). When the pressing plate (601) is lowered, the power-carrying portion (602) can abut against the positive electrode sheet (700), and the base (5) can be pressed into the solution, so that a pulse current is applied to the positive electrode sheet (700) in the solution, so that the positive electrode material separated from the positive electrode sheet (700) is dispersed in the solution; A second conveying mechanism (7) is provided on the base (5), and the second conveying mechanism (7) is configured to convey the separated current collector of the positive electrode sheet (700) to the recovery area (400).

2. The DRT-based high-voltage pulse separation and recovery device for positive electrode sheets according to claim 1, wherein: The loading area (200) is provided with a material tray (1), the material tray (1) is provided with a positioning groove (101) for placing the positive electrode sheet (700), and the base (5) is provided with a positioning structure (8), and the positioning structure (8) is configured to align the positioning groove (101) with the current-carrying part (602).

3. The DRT-based high-voltage pulse separation and recovery device for positive electrode sheets according to claim 2, wherein: The positioning structure (8) comprises a positioning member (801) and a guide roller (802); a mounting groove is provided on the top surface of the base (5) at the front end along the conveying direction of the first conveying mechanism (2); the positioning member (801) can be raised and lowered in the mounting groove; when the material tray (1) is conveyed to the base (5), at least part of the positioning member (801) can rise outside the mounting groove to limit the movement of the material tray (1); two rows of guide rollers (802) are provided on the top surface of the base (5) at intervals along the conveying direction perpendicular to the first conveying mechanism (2); the two rows of guide rollers (802) are arranged to respectively roll against two side surfaces of the material tray (1) perpendicular to its own moving direction.

4. The DRT-based high-voltage pulse separation and recovery device for positive electrode sheets according to claim 2, wherein: The bottom of the positioning groove (101) is arranged as a grid structure (102), and the solution can penetrate through the grid structure (102) into the positioning groove (101).

5. The DRT-based high-voltage pulse separation and recovery positive electrode sheet device according to claim 1, wherein: The base (5) is connected to the inner bottom wall of the reaction box (4) via a retractable support leg (9), and an elastic member (10) is sleeved on the outer side of the support leg (9). The elastic member (10) is arranged between the base (5) and the inner bottom wall of the reaction box (4). The elastic member (10) can drive the base (5) to return to its original position upward after the pressure is reduced.

6. The DRT-based high-voltage pulse separation and recovery positive electrode sheet device according to any one of claims 2 to 5, wherein: The recycling area (400) is provided with a recycling box (11) with an open top, and a rotating seat (12) is provided above the recycling box (11). The second conveying mechanism (7) conveys the material tray (1) to the rotating seat, and a fixing mechanism (13) is provided on the rotating seat (12). The fixing mechanism (13) is configured to restrict the material tray (1) on the rotating seat (12). The rotating seat (12) is connected to a turning mechanism (14), and the turning mechanism (14) can drive the rotating seat (12) to turn over so as to pour the collector of the positive electrode sheet (700) into the recycling box (11).

7. The DRT-based high-voltage pulse separation and recovery device for positive electrode sheets according to claim 6, wherein: A third conveying mechanism (15) is provided on the rotating seat (12), and the third conveying mechanism (15) is connected to the first conveying mechanism (2). The third conveying mechanism (15) can convey the material tray (1) to the second conveying mechanism (7).

8. The DRT-based high-voltage pulse separation and recovery device for positive electrode sheets according to claim 6, wherein: The fixing mechanism (13) comprises a clamping plate (131) and a driving member (132); the clamping plate (131) is arranged on the inner side wall of the rotating seat (12) and is spaced apart from the inner bottom wall of the rotating seat (12); a space for accommodating the material tray (1) is formed between the clamping plate (131) and the rotating seat (12); the driving member (132) is connected to the clamping plate (131); the driving member (132) can drive the clamping plate (131) to move in a vertical direction and press against the material tray (1).

9. The DRT-based high-voltage pulse separation and recovery device for positive electrode sheets according to any one of claims 2 to 5, wherein: A cleaning area (500) is provided between the processing area (300) and the recovery area (400), and a fourth conveying mechanism (16) is provided in the cleaning area (500). The fourth conveying mechanism (16) is configured to convey the positive electrode sheet (700) from the processing area (300) to the recovery area (400). A cleaning component and a drying component are provided above the fourth conveying mechanism (16), and the cleaning component includes a first nozzle (17) for spraying cleaning liquid, and the drying component includes a second nozzle (18) for blowing air. The first nozzle (17) and the second nozzle (18) are arranged in sequence along the conveying direction of the fourth conveying mechanism (16) and face the fourth conveying mechanism (16).

10. The DRT-based high-voltage pulse separation and recovery device for positive electrode sheets according to claim 9, wherein: A transition zone (600) is provided between the cleaning zone (500) and the processing zone (300), and a first water collecting tank (19) is provided in the transition zone (600). The first water collecting tank (19) is connected to the reaction tank (4) through a pipeline, and a fifth conveying mechanism (20) is provided above the first water collecting tank (19). The fifth conveying mechanism (20) is configured to convey the material tray (1) from the processing zone (300) to the cleaning zone (500). A drain portion is provided on the fifth conveying mechanism (20), and the solution attached to the positive electrode sheet (700) can drip into the first water collecting tank (19) through the drain portion.

11. The DRT-based high-voltage pulse separation and recovery device for positive electrode sheets according to any one of claims 1 to 5, wherein: The loading mechanism (3) comprises a suction cup assembly (301), a first moving assembly (302) and a second moving assembly (302), wherein the first moving assembly (302) is connected to the suction cup assembly (301) to drive the suction cup assembly (301) to move up and down, and the second moving assembly (302) is connected to the first moving assembly (302) to drive the first moving assembly (302) to move back and forth between the storage area (100) and the loading area (200).

12. A method for separating and recovering positive electrode sheets by high-voltage pulses, using the DRT-based high-voltage pulse separation and recovery positive electrode sheet device according to any one of claims 1 to 11 to separate and recover the positive electrode sheets (700), the method comprising the following steps: Step S100, the loading mechanism (3) transfers the positive electrode sheet (700) to be processed in the storage area (100) to the first conveying mechanism (2) in the loading area (200), and then the first conveying mechanism (2) conveys the positive electrode sheet (700) to the base (5) in the processing area (300); Step S200: After the positive electrode sheet (700) is transported to the base (5), the pressing plate (601) of the pulse discharge module (6) is lowered so that the power supply portion (602) abuts against the positive electrode sheet (700), and the positive electrode sheet (700) and the base (5) are pressed together into the solution in the reaction box (4); Step S300: after the positive electrode sheet (700) is completely immersed in the solution, the power supply unit (602) is powered on to apply a pulse current to the positive electrode sheet (700) so as to separate the positive electrode material of the positive electrode sheet (700) from the current collector; Step S400: After separation, the pressing plate (601) rises and moves away from the base (5), so that the base (5) rises and resets, and the second conveying mechanism (7) conveys the collector to the recovery area (400) for recovery.

13. The method for high-voltage pulse separation and recovery of positive electrode sheets according to claim 12, wherein: In the step S400, the current collector is cleaned and dried during the process of moving the current collector from the processing area (300) to the recovery area (400).

14. The method for high-voltage pulse separation and recovery of positive electrode sheets according to claim 12, wherein: The first conveying mechanism (2) conveys a material tray (1), and the base (5) is provided with a positioning structure (8); In the step S100, the loading mechanism (3) positions and places the positive electrode sheet (700) on the material tray (1), and the first conveying mechanism (2) conveys the material tray (1) and the positive electrode sheet (700) together to the base (5); In the step S200, during the process of conveying the material tray (1) to the base (5), the positioning structure (8) blocks and positions the material tray (1) so that the positive electrode sheet (700) on the material tray (1) is aligned with the current-carrying part (602).

15. The method for high-voltage pulse separation and recovery of positive electrode sheets according to claim 14, wherein: The recycling area (400) is provided with a recycling box (11) with an open top, a rotating seat (12) is provided above the recycling box (11), and the rotating seat (12) is provided with a fixing mechanism (13) and a third conveying mechanism (15) connected to the first conveying mechanism (2); In the step S400, the second conveying mechanism (7) conveys the material tray (1) to the rotating seat (12), and then the fixing mechanism (13) presses against the material tray (1) to restrict the material tray (1) on the rotating seat (12); The rotating seat (12) is turned over, and the collector on the material tray (1) is poured into the recovery box (11) for recovery, and then the rotating seat (12) is turned over and reset, the fixing mechanism (13) is away from the material tray (1), and the third conveying mechanism (15) conveys the material tray (1) to the first conveying mechanism (2) for recycling.

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