Method and system for recycling pole piece of waste power battery

Abstract

The invention discloses a method and a system for recycling a pole piece of a waste power battery, an adhesive of the pole piece is hydrolyzed by adopting a water vapor environment, the hydrolysis process is accelerated by utilizing the high temperature of water vapor, and no condensed water participates in the whole process, so that black powder and a current collector are prevented from forming adhesion and forming relatively pure separation, and meanwhile, the recovery rate of the pole piece of the waste power battery is greatly improved. Separation is formed by a screening means in the absence of condensed water, so that the current collector and the black powder are thoroughly separated and are relatively clean; therefore, when the process method is used for sorting the black powder of the pole piece and the current collector, the problem of excessive impurities is avoided, the working efficiency is improved, the energy consumption is reduced, the water consumption is reduced, and the treatment cost is saved.

Description

Technical Field

[0001] This invention relates to the field of solid waste treatment technology in the new energy sector, and particularly to a method and system for recycling electrode sheets from waste power batteries. Background Technology

[0002] With the rapid development of the new energy industry, power lithium batteries are widely used in electric vehicles and hybrid vehicles. Under normal conditions, power lithium batteries have a limited lifespan. If discarded lithium batteries are not properly disposed of, they will cause significant environmental pollution and the loss of current collectors (aluminum foil and copper foil). Therefore, the recycling and disposal of waste power lithium batteries has become a technical problem that needs to be solved at present. In existing technologies, the difficulty in recycling and disposing of power lithium batteries lies in the treatment of the electrode sheets, namely the separation and separate recycling of black powder (lithium component electrode powder and carbon powder) and current collectors. The commonly used method is comprehensive treatment, which involves directly incinerating and crushing the batteries, followed by a series of separation processes such as screening, ball milling, water washing, and magnetic separation. The entire process is lengthy, time-consuming, costly, and complex in operation and transportation. For example, Chinese patent CN112961984A discloses a process for selectively recycling current collectors from waste lithium-ion batteries, which uses the above method. The separation effect after water washing is poor, resulting in a large amount of impurities in the final current collector and black powder, as well as increased water waste, pollution, load, and energy consumption, thereby increasing the processing cost.

[0003] Therefore, it is necessary to improve the existing electrode separation technology to completely separate the black powder from the electrode, so as to avoid the problem of excessive impurities, improve work efficiency, reduce energy consumption and water consumption, and save processing costs. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a method and system for recycling the electrode sheets of waste power batteries. This method can completely separate the black powder of the electrode sheets from the current collector, avoid the problem of excessive impurities, improve work efficiency, reduce energy consumption and water consumption, and save processing costs.

[0005] The present invention provides a method for recycling the electrode sheets of waste power batteries, comprising the following steps: a. Pre-treat the electrode sheets of used power batteries to form electrode units of appropriate size; b. The electrode unit is fed into the processing container, steam is introduced into the processing container, and the electrode unit in the processing container is stirred to maintain the steam in the processing container in a gaseous state. c. After the current collector and black powder of the electrode are fully separated, the current collector and black powder in the processing container are sent out for sorting, or they are sorted in the processing container and then sent out.

[0006] Furthermore, in step b, after introducing steam, the processing container is sealed and kept at a temperature above the steam liquefaction temperature.

[0007] Furthermore, in step a, the electrode unit is first soaked in water; in step b, before sealing the treatment container, the air inside the treatment container is purged with steam.

[0008] Furthermore, the processing container has both heat preservation and heating functions.

[0009] Furthermore, the temperature inside the processing container is maintained above 100°C, and the pressure is controlled at or slightly above atmospheric pressure.

[0010] The present invention also discloses a recycling system for the electrode sheets of waste power batteries, including a cylinder for receiving the electrode sheets of waste power batteries and forming a stirring cylinder, the cylinder being provided with an openable and closable water vapor inlet and an openable and closable material inlet for placing the electrode sheets of power batteries.

[0011] Furthermore, the cylinder is a horizontal cylinder, and the horizontal cylinder is equipped with a stirring assembly that can be driven to rotate and a temperature maintenance assembly for maintaining the temperature inside the cylinder.

[0012] Furthermore, the stirring assembly includes a drive motor, a drive shaft, and a stirring blade assembly. The drive shaft is driven to rotate by the drive motor. The stirring blade assembly includes several support plates and several stirring blades. The support plates extend radially and are fixed to the drive shaft in a radial and axial array arrangement. The stirring blades extend axially and are fixed to the radially outer ends of the support plates in the same axial row. The stirring blades are provided with shovel heads extending circumferentially. The shovel heads have shovel blades near the inner wall of the cylinder. During stirring, the drive shaft is driven to carry the stirring blades towards the shovel blades.

[0013] Furthermore, the temperature maintaining component includes an insulation layer wrapped around the outside of the cylinder and an electric heating component located between the insulation layer and the cylinder.

[0014] Furthermore, it also includes a discharge system, which comprises a current collector discharge system and a black powder discharge system; The fluid collection and discharge system includes an openable and closable fluid collection and discharge port located at one end of the cylinder and a tilting drive device for driving the cylinder to tilt toward the end of the fluid collection and discharge port. The discharge port of the collector is sealed by a non-metallic end cap that can be opened and closed; The black powder discharge system includes a black powder discharge conveying channel. The bottom of the cylinder is opened in a set area for black powder to pass through a sieve. The opening area of ​​the sieve allows the falling black powder to enter the black powder discharge conveying channel.

[0015] Furthermore, there are several water vapor inlets arranged in two rows at the bottom, and the two rows of water vapor inlets are symmetrically arranged with the gas outlet direction facing the center of the cylinder. The lower part of the cylinder is also provided with an openable and closable replacement port.

[0016] The beneficial effects of this invention are as follows: This invention provides a method and system for recycling electrode sheets from waste power batteries. It uses a steam environment to hydrolyze the adhesive on the electrode sheets, and utilizes the high temperature of the steam to accelerate the hydrolysis process. No condensation water is involved throughout the process, thus preventing the black powder from adhering to the current collector, resulting in a relatively pure separation. Simultaneously, in the absence of condensation water, sieving is used to separate the current collector and black powder, ensuring thorough and relatively clean separation. Therefore, this process method, when used for separating black powder from the current collector of electrode sheets, avoids excessive impurities, improves work efficiency, reduces energy consumption and water usage, and saves processing costs. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view along AA; Figure 3 for Figure 1 Enlarged view of point B; Figure 4 for Figure 2 Enlarged view of point C; Figure 5 This is a schematic diagram illustrating the principle of the cylinder being driven to tilt. Detailed Implementation

[0018] like Figures 1 to 5 As shown: This embodiment of a method for recycling the electrodes of a waste power battery includes the following steps: a. The electrode sheets of the waste power battery are pre-treated to form electrode units of appropriate size. In this step, the electrode sheets are usually formed into smaller electrode units (forming electrode fragments) by mechanical means such as shearing. In addition, for the convenience of subsequent processing, the positive electrode sheet and the negative electrode sheet are usually pre-treated separately to avoid the aluminum foil and copper foil mixing together and the lithium component electrode powder and carbon powder mixing together, which would cause difficulties in subsequent separation. In this embodiment, the positive electrode sheet (aluminum foil as the current collector) is mainly used as an example for illustration, and will not be described in detail here. b. The electrode unit is fed into the processing container, steam is introduced into the processing container, and the electrode unit inside the processing container is stirred to maintain the steam in a gaseous state. The stirring action of the processing container can be achieved by setting up a stirring device inside the processing container, or by the rotation of the processing container itself (with internal structures such as fins to assist stirring), which are existing mechanical stirring methods and will not be elaborated here. There is no limitation on the method of introducing steam into the container, with the aim of maintaining the temperature inside the container and preventing condensation. For example, steam can be continuously introduced and kept warm to ensure that there is no condensation and that the electrode unit is in a relatively dry environment. The adhesive used to bond the aluminum foil and black powder in the electrode is hydrolyzed and loses its bonding effect rapidly under the action of water molecules in the steam and high temperature. During the stirring process, the collision causes the black powder to fall off the electrode, so that the two are quickly and completely separated. c. After the current collector of the electrode to be processed (in this embodiment, it is the positive electrode and the current collector is aluminum foil) and the black powder are fully separated, the current collector and black powder in the processing container are sent out for sorting. The separated mixture can be sent out of the processing container by existing methods such as screw conveyor or pouring it out of the separation container. The sorting process is generally sieving (the aluminum foil and black powder have a large size difference), but the sieving environment needs to have certain temperature requirements to avoid condensation and adhesion. This is a method that is easy to implement with existing technology and will not be described in detail here. Of course, the aluminum foil and black powder can also be sorted inside the processing container before being sent out. In this case, the aluminum foil and black powder are completely separated, so there is no need to worry about condensation. There are no requirements for the transportation environment. Relatively speaking, screening inside the processing container is more energy-saving. To achieve the purpose of screening inside the processing container, sieve holes can be added to the bottom of the processing container so that the black powder falls directly into the lower part of the sieve holes. Under the condition of rotating and stirring in the processing container, a closable sieve hole channel can be set up, which will not be elaborated here.

[0019] In this embodiment, in step b, after introducing steam, the processing container is sealed and kept at a temperature above the liquefaction temperature of the steam. Of course, the sealing process only includes the external environment and does not include the steam inlet. The steam inlet being kept open is beneficial for maintaining the temperature inside the processing container and ensuring that steam is replenished after consumption, which will not be elaborated here. That is, in order to maintain the temperature inside the cylinder, for structures with stirring equipment inside the cylinder, a structure that allows steam to enter can be adopted, and a steam release device with a certain pressure (generally a boiler) can be used. Of course, the processing container needs to be equipped with an insulation layer and heating components (such as electric heating) to maintain the temperature inside the processing container.

[0020] In this embodiment, in step a, the electrode unit is first soaked in water to wet the adhesive, which further improves the separation efficiency in the processing container; in step b, before sealing the processing container, the air in the processing container is replaced by water vapor. The replacement method is to open the replacement port of the processing container when water vapor is introduced. It is generally set at the bottom to facilitate the air outflow, so as to ensure the purity of the water vapor and improve the processing efficiency.

[0021] In this embodiment, the temperature inside the processing container is maintained above 100°C, and the pressure is controlled at or slightly above atmospheric pressure. The use of atmospheric pressure or slightly above atmospheric pressure in this embodiment reduces the sealing burden on the cylinder, and the lower pressure also improves hydrolysis efficiency. Because the processing container is relatively closed, the internal pressure will be slightly higher than atmospheric pressure. The temperature is generally controlled at around 110°C to ensure that water vapor does not condense. In this embodiment, the stirring speed is generally controlled within the range of 5-30 revolutions per minute by a variable frequency drive motor, and complete separation can be achieved in no more than one hour. Overall, the process is short, efficient, space-saving, energy-saving, and cost-effective. The method of the present invention is used to separate the current collector and black powder of the electrode sheet. The applicable occasions require the binder to be water-soluble, such as carboxymethyl cellulose, polyacrylic acid, etc., which will not be elaborated here.

[0022] This invention also discloses a recycling system for the electrode sheets of waste power batteries, including a cylinder 1 for receiving the electrode sheets of waste power batteries and forming a stirring mechanism. The cylinder 1 is provided with an openable and closable steam inlet 8 and an openable and closable material inlet 102 for placing the electrode sheets of the power batteries. The cylinder is naturally a closed container structure, which will not be described in detail here. The openable and closable steam inlet and the openable and closable material inlet 102 can be implemented using existing mechanical structures, which will not be described in detail here. The cylinder structure of this invention uses steam and stirring to hydrolyze the battery electrode sheets, which has high processing efficiency, does not cause water pollution, and has the characteristics of low energy consumption. like Figure 1 As shown, the material inlet 102 is equipped with a feed hopper 9, and the feed channel of the feed hopper 9 is equipped with an openable and closable feed gate valve 901. This feed gate valve can be an electrically controlled valve. After feeding is completed, the feed hopper 9 is closed, forming a closed structure inside the cylinder 1. Since water vapor may be constantly circulating during use, the pressure inside the cylinder may exceed atmospheric pressure by a significant margin. That is, when the pressure inside the cylinder 1 exceeds a certain range, such as 1.5 atmospheres, the feed gate valve 901 can be controlled to open to a certain degree to release pressure. This process requires a pressure sensor to be installed on the cylinder. The pressure value is transmitted to a computer, and the computer issues corresponding instructions to the feed gate valve 901. This is a control method of existing technology and will not be described in detail here. Of course, a low-pressure safety valve can also be installed, which are all existing safety protection measures and will not be described in detail here.

[0023] In this embodiment, the cylinder 1 is a horizontal cylinder, and the horizontal cylinder is equipped with a rotatable stirring assembly and a temperature maintaining assembly for maintaining the temperature inside the cylinder 1; such as Figure 1 As shown, a horizontal cylinder refers to a container with a horizontal central axis, generally formed by adding end caps or covers to both ends of a cylindrical body. In this embodiment, two flat covers 2 are used, which eliminates dead corners during stirring and allows the material to be fully dispersed, resulting in high processing efficiency. The stirring assembly refers to any mechanical mechanism capable of stirring, which can be achieved using existing mechanical structures and mechanical transmission methods, and will not be elaborated here. The temperature maintenance assembly can use all existing heating and insulation methods, such as adding an external insulation layer or using existing heating methods including electric heating, etc., with the aim of preventing water vapor inside the cylinder from condensing into water, and will not be elaborated here.

[0024] In this embodiment, the stirring assembly includes a drive motor 3, a drive shaft 5, and a stirring blade assembly. The drive shaft 5 is driven to rotate by the drive motor 3. Figure 1 As shown, the drive motor 3 consists of two caps 2 located at both ends of the cylinder 1 and fixedly connected. The drive shaft 5 is connected to the reducer 4 via a conventional dynamic seal through the end caps. The two drive motors 3 input power to both ends of the drive shaft 5 through their respective reducers 4, forming a balanced power input to ensure the stirring effect. The stirring blade assembly includes several support plates 6 and several stirring blades 7. The support plates 6 extend radially and are fixed to the drive shaft 5 in a radial and axial array arrangement. The stirring blades 7 extend axially and are fixed to the radially outer ends of the support plates 6 in the same axial row. The stirring blades 7 have shovel heads extending circumferentially, and the shovel heads have blades near the inner wall of the cylinder 1. During stirring, the drive shaft is driven to carry the stirring blades towards the blades. Figure 2 As shown, the radially outer surface of the shovel head can conform to the inner surface of the cylinder (an arc shape that adapts to the shape of the inner surface of the cylinder). The shovel blade is as close as possible to the inner wall of the cylinder 1 without affecting the stirring rotation. During stirring, the shovel head scoops up the material (the processed electrode unit) at the bottom of the cylinder 1, rotates it to a certain height, and then the material falls, thus forming a structure that utilizes gravity to achieve high-efficiency stirring; as shown. Figure 1 As shown, the stirring blade 7 is a strip along the axial direction of the cylinder 1, with the blade head extending in the direction of rotation and the front end being a blade. The stirring blade 7 also forms a radially extending connecting part, which is fixed to the support plate 6. This is a typical mechanical connection structure, and will not be described in detail here.

[0025] In this embodiment, the temperature maintaining component includes a heat insulation layer wrapped around the outside of the cylinder and an electric heating component located between the heat insulation layer and the cylinder 1; as Figure 1 As shown, the outer shell of the cylinder 1 is surrounded by an insulation layer 101, and the outer sides of the two covers 2 are covered with an insulation layer 201. The insulation layer is generally made of rock wool and secured with sheet metal, a common insulation layer covering method, which will not be described in detail here; Figure 2 As shown, several heating spaces 106 for installing electric heating components are provided between the insulation layer 101 and the outer wall of the cylinder 1. To avoid the influence of rock wool on the electric heating components, the heating spaces can be separated by heat-resistant plates (steel plates welded to the outer wall of the cylinder 1 are sufficient), which will not be described in detail here; Figure 2 As shown, the electric heating assembly includes several electric heating rods 13, which are fixed on insulating blocks 14 (using metal clips connecting adjacent insulating blocks at both ends). The insulating blocks 14 are fixed to the outer wall of the cylinder (the outer wall of the cylinder can be provided with corresponding mounting seats, using threads, bolts, etc. to form a fixation, which is an existing mechanical fixing method and will not be described in detail here). Two adjacent insulating blocks 14 support one electric heating rod, forming insulation while heat is transferred to the cylinder through the gap between the two insulating blocks 14. The structure is simple and the heat transfer is efficient, and will not be described in detail here. The number of heating spaces, the power and number of electric heating rods can be set according to the heating needs, and will not be described in detail here. In this embodiment, a discharge system is also included, which includes a current collector discharge system and a black powder discharge system; The fluid collection and discharge system includes an openable and closable fluid collection and discharge port 105 disposed at one end of the cylinder 1 and an inclined drive device for driving the cylinder 1 to tilt toward the end of the fluid collection and discharge port. The discharge port 105 of the collector is sealed by a non-metallic end cap 10 that can be opened and closed, such as Figure 1 As shown, the discharge port extends outward to form a discharge section. The discharge section is sealed by a non-metallic end cap 10. The non-metallic end cap 10 is generally made of a high-temperature material resistant to water vapor, which is lightweight and has poor thermal conductivity, thus helping to maintain the temperature inside the cylinder 1. The edge of the discharge section forms a first snap-fit ​​flange. The non-metallic end cap 10 has a set length. After sealing, the inner end face is close to the inner wall of the corresponding end cap 2 to avoid forming a stirring dead corner at that point. The outer side forms a second snap-fit ​​flange. After sealing, the first snap-fit ​​flange and the second snap-fit ​​flange overlap and are secured by a snap-fit ​​member 11. The snap-fit ​​member 11 can be structured to form a snap-fit. It can be a ring snap-fit ​​or multiple single snap-fit ​​members evenly distributed along the circumference, all of which can achieve the purpose of the invention. When unloading is required, the snap-fit ​​member 11 is opened and the non-metallic end cap 10 is removed. In this embodiment, the discharge port 105 is set as low as possible to ensure thorough tilting unloading. The tilting drive device employs a drive structure that tilts the cylinder 1 towards one end. Tilting towards the discharge port means that one end of the discharge port lowers or the other end rises, or both simultaneously, to ensure that material flows out of the discharge port. This will not be elaborated further here. Figure 2 and Figure 5 As shown, the cylinder 1 is fixedly supported on a platform 15 by a support frame 20 (the structure of the support frame is not limited, as long as it can stably support the cylinder 1). The platform 15 is supported by two sets of hydraulic cylinders. One set of hydraulic cylinders is located on the side corresponding to the discharge port, and the other set of hydraulic cylinders is located on the other side. The upper end of the piston rod of one set of hydraulic cylinders 16 is hinged to the platform (rotating in the axial direction of the cylinder). Figure 5 The hinge point 19 shown indicates that the upper end of the piston rod of another set of hydraulic cylinders 17 rolls into contact with the platform 15. Of course, it is necessary to set up a hinge point 19 as shown. Figure 5 The roller 18 shown is provided with a guide groove 1501 at the bottom of the platform 15 to accommodate the roller and adapt to the horizontal displacement changes when tilted. The number of hydraulic cylinders is set according to the required support weight of the cylinder, which will not be described in detail here. In this embodiment, the hydraulic cylinder is used to form a support and adjust the height, which has the characteristics of large load capacity and smooth drive, which will not be described in detail here. In this embodiment, during the tilting discharge process, the stirring component continues to stir to assist the discharge, thereby structurally improving the discharge speed. The black powder discharge system includes a black powder discharge conveying channel 2. The bottom of the cylinder 1 has sieve holes 1071 for black powder to pass through in a designated area 107. The designated area 107 forms a screening section that axially penetrates the cylinder 1. The sieve holes 1071 are distributed in the screening section so that falling black powder enters the black powder discharge conveying channel 2. Figure 1 As shown, the black powder discharge conveying channel 2 is an irregular funnel structure formed by an inclined panel and a vertical panel. The cross-section of both the inclined panel and the vertical panel can be arc-shaped. The two form a closed receiving structure discharge funnel structure. Of course, this funnel structure is fixed to the bottom of the cylinder and can be welded or detachably connected. The length of the inclined panel is adapted to the axial size of the screening section. To ensure the heat preservation effect, the outer surface of the inclined panel is provided with a heat preservation layer. The upper end of the inclined panel is fixed and closed to the cylinder, and the lower end is connected to the black powder discharge port 1201. The black powder discharge port 1201 is provided with an openable and closable gate 12011 (which can be electrically controlled). The discharge of the black powder from the discharge port 1201 is guided and conveyed to the corresponding subsequent processing location, such as a ground trough, etc., which will not be described in detail here. The lowest point of the downward-sloping black powder discharge conveying channel 2 is located on the side corresponding to the discharge port. When discharging at an angle, it also facilitates the sliding of black powder that is not flowing down the slope, thus assisting in the unloading of black powder. like Figure 3As shown, the upper end of the sieve hole 1071 is shaped like an inverted frustum, that is, the sieve hole 1071 is composed of an inverted frustum-shaped hole at the top and a cylindrical hole at the bottom, so that the upper opening edges of adjacent sieve holes are as close as possible and can be polished smooth, which allows the black powder to be fully collected. In this structure, under the action of stirring and high temperature steam, the black powder falls off and flows directly into the sieve hole, avoiding secondary contamination and adhesion of aluminum foil. Thus, the material can be discharged directly after stirring, without the need for a special screening structure.

[0026] In this embodiment, there are several steam inlets 8 arranged in two rows at the bottom. The two rows of steam inlets 8 are symmetrically arranged and the steam outlet direction is towards the center of the cylinder 1. In this structure, the steam pressure can be used to stir the material in the cylinder during the steam introduction process, forming a preliminary stirring, which helps to improve the stirring efficiency. In this structure, each steam inlet 8 is connected to an air inlet pipe, each row of air inlet pipes is connected to an air inlet branch pipe, and two air inlet branch pipes are connected to an air inlet main pipe. This structure is a general configuration of pipeline connection, and those skilled in the art can know how to arrange it based on this description, so it is not marked in the figure. In this structure, the main pipe, the two air inlet branch pipes, and each air inlet pipe are each equipped with a solenoid valve to realize opening and closing, which can be used to adjust the amount of steam input in a targeted manner, and will not be described in detail here. A closable replacement port 103 is also provided at the lower position of the cylinder 1; such as Figure 1 As shown, the replacement port 103 is set to be openable and closable by a valve, and is located on the side opposite to the discharge port 105 with a cover to avoid interference. At the same time, the lower position of the replacement port 103 facilitates the outflow of cold air and improves the replacement efficiency.

[0027] The accompanying drawings of this invention are schematic diagrams, and the structures shown are described in the specification. Alternatively, the structure can be achieved using existing mechanical structures and designs, such as bolted connections to form a seal, welding fixation, etc. To ensure the stability of the fixation, support ribs can be added, etc., which will not be elaborated here.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for recycling electrode sheets from waste power batteries, characterized in that: Includes the following steps: a. Pre-treat the electrode sheets of used power batteries to form electrode units of appropriate size; b. The electrode unit is fed into the processing container, steam is introduced into the processing container, and the electrode unit in the processing container is stirred to maintain the steam in the processing container in a gaseous state. c. After the current collector and black powder of the electrode are fully separated, the current collector and black powder in the processing container are sent out for sorting, or they are sorted in the processing container and then sent out.

2. The method for recycling the electrode sheets of waste power batteries according to claim 1, characterized in that: In step b, after introducing steam, the processing container is sealed and kept at a temperature above the steam liquefaction temperature.

3. The method for recycling the electrode sheets of waste power batteries according to claim 2, characterized in that: In step a, the electrode unit is first soaked in water; in step b, the air inside the treatment container is purged with steam before sealing the treatment container.

4. The method for recycling the electrode sheets of waste power batteries according to claim 1, characterized in that: The temperature inside the processing container is maintained above 100°C, and the pressure is controlled at or slightly above atmospheric pressure.

5. A recycling system for the electrodes of used power batteries, characterized in that: It includes a cylinder for receiving and stirring the electrode sheets of waste power batteries, the cylinder having an openable and closable steam inlet and an openable and closable material inlet for placing the electrode sheets of the power batteries.

6. The recycling system for the electrode sheets of waste power batteries according to claim 5, characterized in that: The cylinder is a horizontal cylinder, and the horizontal cylinder is equipped with a stirring assembly that can be driven to rotate and a temperature maintenance assembly for maintaining the temperature inside the cylinder.

7. The recycling system for the electrode sheets of waste power batteries according to claim 6, characterized in that: The stirring assembly includes a drive motor, a drive shaft, and a stirring blade assembly. The drive shaft is driven to rotate by the drive motor. The stirring blade assembly includes several support plates and several stirring blades. The support plates extend radially and are fixed to the drive shaft in a radial and axial array arrangement. The stirring blades extend axially and are fixed to the radially outer ends of the support plates in the same axial row. Each stirring blade has a shovel head extending circumferentially. The shovel head has a blade near the inner wall of the cylinder. During stirring, the drive shaft is driven to carry the stirring blades towards the blade.

8. The recycling system for the electrode sheets of waste power batteries according to claim 6, characterized in that: The temperature maintaining assembly includes an insulation layer wrapped around the outside of the cylinder and an electric heating assembly located between the insulation layer and the cylinder.

9. The recycling system for the electrode sheets of waste power batteries according to claim 6, characterized in that: It also includes a discharge system, which comprises a current collector discharge system and a black powder discharge system; The fluid collection and discharge system includes an openable and closable fluid collection and discharge port located at one end of the cylinder and a tilting drive device for driving the cylinder to tilt toward the end of the fluid collection and discharge port. The discharge port of the collector is sealed by a non-metallic end cap that can be opened and closed; The black powder discharge system includes a black powder discharge conveying channel. The bottom of the cylinder is opened in a set area for black powder to pass through a sieve. The opening area of ​​the sieve allows the falling black powder to enter the black powder discharge conveying channel.

10. The recycling system for the electrode sheets of waste power batteries according to claim 5, characterized in that: The steam inlets are several and arranged in two rows at the bottom. The two rows of steam inlets are symmetrically arranged and the steam outlet direction is towards the center of the cylinder. The lower part of the cylinder is also provided with an openable and closable replacement port.

Images