Pole piece powder separation equipment and battery material recovery system

Abstract

The utility model discloses pole piece powder separation equipment and a battery material recovery system. The pole piece powder separation equipment comprises a stirring mechanism and a spraying mechanism. The stirring mechanism comprises a containing barrel and a stirring assembly, the containing barrel is used for containing the separation liquid and the pole piece, and the stirring assembly is used for stirring the separation liquid and the pole piece so as to separate at least part of active powder on the pole piece from the pole piece, so that the pole piece subjected to preliminary separation is obtained. The spraying mechanism comprises a spraying device and a liquid collecting container which are oppositely arranged, the spraying device is used for spraying separation liquid to the preliminarily separated pole pieces so as to remove residual active powder on the preliminarily separated pole pieces, and the liquid collecting container is used for collecting the separation liquid containing the active powder. Compared with the mode that a plurality of pole pieces are crushed and then separated, the pole piece powder separation equipment improves the powder efficiency through secondary separation, the pole piece crushing procedure is omitted, the production cost is reduced, and the separation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a pole piece powder separation device and a battery material recovery system. Background Art

[0002] With the rapid growth of new energy vehicle ownership, the installation of lithium-ion batteries has accelerated. The service life of lithium-ion power batteries is about 5-7 years. It is estimated that by 2025, the retired battery volume will exceed 640,000 tons, and the retired power battery volume will account for more than 50%. Therefore, it is necessary to recycle the retired batteries to reduce their pollution to the environment and reuse the materials.

[0003] At present, the separation efficiency of the method for recycling the powder of battery pole pieces is low, so it is necessary to improve the above technical solution. Utility Model Content

[0004] In view of the above problems, the present application provides a pole piece powder separation device, which can improve the separation efficiency of active powder on the electrode pole piece.

[0005] In a first aspect, the present application provides a pole piece powder separation device, including a stirring mechanism and a spraying mechanism. The stirring mechanism includes a containing barrel and a stirring assembly, the containing barrel is used to contain a separation liquid and a pole piece, and the stirring assembly is used to stir the separation liquid and the pole piece to separate at least part of the active powder on the pole piece from the pole piece to obtain a pole piece that has been preliminarily separated. The spraying mechanism includes a spraying device and a liquid collecting container arranged relatively to each other, the spraying device is used to spray the separation liquid on the pole piece that has been preliminarily separated to remove the active powder remaining on the pole piece that has been preliminarily separated, and the liquid collecting container is used to collect the separation liquid containing the active powder.

[0006] In the technical solution of the embodiment of the present application, a stirring mechanism is provided to stir the separation liquid to dissolve the binder on the electrode plate, so as to preliminarily separate the powder on the plate. In addition, the spraying mechanism sprays the preliminarily separated plate, which can increase the pressure on the plate to separate the powder with relatively strong adhesion, further improving the separation efficiency of the powder. Compared with crushing multiple plates and then separating them, the plate powder separation equipment of the present application improves the separation efficiency of the powder through secondary separation, eliminates the process of plate crushing, reduces production costs and improves separation efficiency.

[0007] In some embodiments, the electrode powder separation device further includes a filtering device, which is used to filter the active powder in the separation liquid containing the active powder. The above structure, by setting the filtering device, filters and extracts the powder in the separation liquid, improves the separation efficiency and extraction purity of the active powder, and reduces the content of the active powder in the separation liquid, so that the separation liquid can be reused, reducing costs and improving the recycling efficiency of the separation liquid.

[0008] In some embodiments, the electrode powder separation device further includes a filter basket, which is disposed in the receiving barrel, and is provided with a plurality of filter holes, and the filter basket is used to communicate with the inner cavity of the receiving barrel, and the filter basket is used to receive the electrode. In the above structure, the filter basket is disposed in the receiving barrel, and is used to filter and separate the electrode and the separation liquid, and the filter holes are distributed on the filter basket, allowing the separation liquid to pass through but preventing the electrode from passing through, so that the electrode can be quickly separated from the separation liquid and the electrode that has been initially separated can be taken out of the receiving barrel, which reduces the time for extracting the electrode and improves the efficiency of subsequent secondary separation of the electrode that has been initially separated.

[0009] In some embodiments, the filter basket includes a body and a support block protruding outward along the circumference of the body, the filter hole is provided in the body, and the support block is used to overlap the opening edge of the storage barrel to detachably connect the body to the storage barrel. In the above structure, the protruding support block not only increases the overall structural strength of the filter basket, but also provides convenience for the connection with the storage barrel. Through simple overlap, the filter basket can be quickly installed on the storage barrel, simplifying the operation process. The filter basket can be easily taken out of the storage barrel without tedious disassembly work. This flexibility is particularly important when the filter basket needs to be frequently replaced or cleaned, which can greatly improve work efficiency. The filter hole is provided on the body, ensuring that the separation liquid can flow out quickly through the filter hole, while the pole piece remains in the filter basket, realizing effective solid-liquid separation. Therefore, the above structure reduces the time of extracting the pole piece and improves the efficiency of subsequent secondary separation of the pole piece after preliminary separation.

[0010] In some embodiments, the liquid collection container has a concave receiving groove, the liquid collection container is used to support the filter basket, and the receiving groove is used to receive the separation liquid. In the above technical solution, the filter basket can be directly placed on the liquid collection container to directly spray the electrode pieces that have been initially separated, thereby improving the efficiency of powder separation. In addition, the receiving groove can collect the sprayed separation liquid, thereby improving the efficiency of collecting the separation liquid.

[0011] In some embodiments, the stirring assembly includes a rotary motor and a stirring paddle. One end of the stirring paddle is connected to the rotary motor, and the other end of the stirring paddle extends into the holding barrel to stir the separation liquid and the electrode. In the above structure, a rotary motor is used for stirring, and the use of a rotary motor as a power source can ensure that the stirring paddle obtains continuous and stable rotational power, thereby improving the stirring efficiency. The precise control of the motor also ensures that the stirring speed is moderate, thereby avoiding the separation efficiency being affected by stirring too fast or too slow. In addition, the stirring paddle can extend into the holding barrel, and this design ensures all-round and uniform stirring of the electrode and the separation liquid in the barrel. In particular, for the separation liquid at the bottom of the barrel, due to the design of the stirring paddle, it can be ensured that the material at the bottom can also be fully stirred, thereby avoiding the appearance of dead corners. Therefore, the above technical solution improves the separation efficiency and simplifies the operation process.

[0012] In some embodiments, the filtering device includes a filter press. In the above technical solution, the precise filter screen or filter cloth of the filter press can ensure the effective separation of the active powder and the separation liquid, greatly improving the separation efficiency. The filter press also has the function of squeezing the active powder. By squeezing, the excess liquid components in the active powder can be removed, further improving the purity of the extraction. Incorporating the filter press into the pole piece powder separation equipment not only simplifies the operation process, but also provides higher integration and stability for the overall equipment.

[0013] In some embodiments, the holding barrel includes an inlet, the liquid collecting container has a liquid outlet, a first connecting pipe is connected between the liquid outlet and the inlet, and a first control valve is provided on the first connecting pipe. In the above structure, the first connecting pipe connects the liquid outlet and the inlet, realizing the connection between the liquid collecting container and the holding barrel. This allows the separation liquid to flow directly from the liquid collecting container into the holding barrel, simplifying the process and improving efficiency. The setting of the first control valve further enhances the controllability of the entire system. By adjusting the control valve, the flow rate and speed of the separation liquid flowing into the holding barrel can be controlled to meet the needs under different production conditions. In addition, the separation liquid can be recycled to improve its use efficiency. This not only saves resources, but also helps to reduce the generation of waste liquid, which is in line with the concept of sustainable development. Therefore, the above design makes full use of the separation liquid, improves its recycling rate, and realizes the effective use of resources. At the same time, this structure also simplifies the operating process and brings many conveniences to industrial production.

[0014] In some embodiments, the filter device includes a liquid inlet, a second connecting pipe is connected between the liquid inlet and the liquid outlet, and a second control valve is provided on the second connecting pipe. In the above structure, by providing the second connecting pipe, the filter device is connected to the liquid collecting container, the separation liquid in the filter device is filtered, and the active powder in the separation liquid is extracted, thereby improving the efficiency of extracting the active powder in the separation liquid.

[0015] In some embodiments, the filter device has a liquid discharge port, a third connecting pipe is connected between the liquid discharge port and the inlet, and a third control valve is provided on the third connecting pipe. In the above structure, by providing the third connecting pipe, the filter device is connected to the holding barrel, the filtered separation liquid is input into the holding barrel, and the separation liquid is reused, thereby improving the recycling rate of the separation liquid and reducing the cost.

[0016] In a second aspect, the present application provides a battery material recycling system, which includes the electrode powder separation equipment in the above-mentioned embodiment.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0019] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the exploded structure of a battery according to an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of a battery cell according to an embodiment of the present application;

[0022] Figure 4 This is a schematic structural diagram of a pole piece powder separation device according to an embodiment of the present application;

[0023] Figure 5 This is a structural schematic diagram of a pole piece powder separation device according to another embodiment of the present application;

[0024] Figure 6 This is a schematic diagram of the structure of a filter basket according to an embodiment of the present application;

[0025] Figure 7 This is a structural schematic diagram of a pole piece powder separation device according to another embodiment of the present application;

[0026] Figure 8 This is a schematic structural diagram of a pole piece powder separation device according to another embodiment of the present application.

[0027] DETAILED DESCRIPTION OF REFERENCE NUMERALS

[0028] 1. Vehicle; 2. Battery; 10. Electrode assembly; 20. Shell; 30. End cap; 40. Shell; 3. Controller; 4. Motor; 5. Box; 51. First part; 52. Second part; 53. Accommodation space; 6. Pole piece powder separation equipment; 601. Stirring mechanism; 602. Spraying mechanism; 603. Accommodation barrel; 604. Stirring assembly; 605. Spraying device; 606. Liquid collecting container; 607. Filtering device; 608. 08. Filter basket; 609. Filter hole; 610. Main body; 611. Support block; 612. Receiving tank; 613. Rotating motor; 614. Agitator; 615. Inlet; 616. Outlet; 617. Liquid outlet; 618. First connecting pipe; 619. First control valve; 620. Liquid inlet; 621. Second connecting pipe; 622. Second control valve; 623. Liquid discharge port; 624. Third connecting pipe; 7. Battery cell. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0031] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0035] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0036] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for one embodiment of the present application. Vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 2 is provided inside the vehicle 1, and the battery 2 may be provided at the bottom, head or tail of the vehicle 1. The battery 2 may be used to power the vehicle 1, for example, the battery 2 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 3 and a motor 4, and the controller 3 is used to control the battery 2 to power the motor 4, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0038] In some embodiments of the present application, the battery 2 can be used not only as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0039] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0040] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery provided in one embodiment of the present application. The battery 2 includes a box body 5 and a battery cell 7, and the battery cell 7 is accommodated in the box body 5. The box body 5 is used to provide an accommodating space 53 for the battery cell 7, and the box body 5 can adopt a variety of structures.

[0041] In some optional embodiments, the box body 5 includes a first part 51 and a second part 52, the first part 51 and the second part 52 cover each other, and the first part 51 and the second part 52 jointly define a receiving space 53 for receiving the battery cell 7. Of course, the box body 5 formed by the first part 51 and the second part 52 can be in various shapes, such as a cylinder, a cuboid, etc.

[0042] In some embodiments, the box 5 can be used as part of the chassis structure of the vehicle 1. For example, part of the box 5 can become at least a part of the floor of the vehicle 1, or part of the box 5 can become at least a part of the cross beam and longitudinal beam of the vehicle 1.

[0043] In some embodiments, the first part 51 or the second part 52 may include a frame and a cover plate, and the frame includes a plurality of beam structures.

[0044] In the battery 2, there can be multiple battery cells 7, and the multiple battery cells 7 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 7 are both connected in series and in parallel. The multiple battery cells 7 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 7 is accommodated in the box 5. Of course, the battery 2 can also be a battery module formed by connecting multiple battery cells 7 in series, in parallel, or in mixed connection, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box 5. The battery 2 can also include other structures, for example, the battery 2 can also include a converging component for realizing the electrical connection between the multiple battery cells 7.

[0045] Each battery cell 7 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 7 may be cylindrical, flat, rectangular or in other shapes.

[0046] Please refer to Figure 3 , Figure 3The schematic diagram of the structure of a battery cell 7 provided in one embodiment of the present application. The battery cell 7 refers to the smallest unit constituting the battery 2. Figure 3 The battery cell 7 includes a housing 40, an electrode assembly 10 and other functional components. The housing 40 may include an end cap 30 and a shell 20. The end cap 30 is a component that covers the opening of the shell 20 to isolate the internal environment of the battery cell 7 from the external environment.

[0047] The electrode assembly 10 is a component in the battery cell 7 where electrochemical reactions occur. One or more electrode assemblies 10 may be contained in the housing 20. The electrode assembly 10 includes a positive electrode sheet, a negative electrode sheet, and a separator. The positive electrode sheet includes a sheet, a positive electrode active material, and a binder. The negative electrode sheet includes a sheet, a negative electrode active material, and a binder. The positive electrode active material and the negative electrode active material contain active ions. During the charge and discharge process of the battery cell 7, active ions (such as lithium ions) are embedded and removed back and forth between the positive electrode sheet and the negative electrode sheet. The separator is arranged between the positive electrode sheet and the negative electrode sheet, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow active ions to pass through.

[0048] In some embodiments, the battery cell 7 also includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The present application does not specifically limit the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid. In some embodiments, the electrode assembly 10 is a winding structure. Optionally, the electrode assembly 10 is a laminated structure.

[0049] As the service life of batteries increases, many batteries are gradually reaching the retirement age. Therefore, it is necessary to recycle various materials in the batteries to reduce the impact of retired batteries on the environment and improve the recycling rate of materials. For example, the electrode plates in the battery usually include plates, binders and active powders, and the plates and active materials can be separated by water-soluble methods. Among them, the binder of the negative electrode plate has good water solubility, and can be directly dissolved in water to remove the binder on the negative electrode plate, and the negative electrode plate and the negative active material are separated. The binder of the positive electrode plate has poor water solubility. The positive electrode plate can be treated at high temperature to decompose the binder of the positive electrode plate, and then the treated positive electrode plate is separated by water-soluble to obtain the positive electrode plate and the positive active material. Among the related plate powder separation devices, some improve the separation efficiency of the binder in the plate by crushing the plate. The above method has low separation efficiency and requires the plate to be crushed, which is complex and costly. In addition, some processes use chemical solvents to decompose the binder to obtain the pole piece and the active material. The above method will produce chemical waste liquid that pollutes the environment.

[0050] In view of the above situation, the embodiment of the present application provides a device for separating electrode powder, which dissolves the binder on the electrode plate by stirring the separation liquid through a stirring mechanism, so as to preliminarily separate the powder on the electrode plate. In addition, the spraying mechanism sprays the electrode plate after the preliminary separation, which can increase the pressure on the electrode plate to separate the powder with relatively strong adhesion, and further improve the separation efficiency of the powder. Compared with crushing multiple electrode plates and then separating them, the device of the present application improves the efficiency of the powder through secondary separation, eliminates the process of crushing the electrode plates, reduces the production cost and improves the separation efficiency.

[0051] The following is a detailed description of the electrode powder separation device provided in the embodiment of the present application in conjunction with the accompanying drawings. Figures 4 to 7 , Figure 4 This is a schematic diagram of the structure of a pole piece powder separation device according to an embodiment of the present application. Figure 5 This is a schematic structural diagram of a pole piece powder separation device according to another embodiment of the present application. Figure 6 This is a schematic diagram of the structure of a filter basket according to an embodiment of the present application. Figure 7 This is a schematic structural diagram of an electrode powder separation device according to another embodiment of the present application.

[0052] The embodiment of the present application provides a pole piece powder separation device 6, including a stirring mechanism 601 and a spraying mechanism 602. The stirring mechanism 601 includes a holding barrel 603 and a stirring assembly 604. The holding barrel 603 is used to hold a separation liquid and a pole piece. The stirring assembly 604 is used to stir the separation liquid and the pole piece to separate at least part of the active powder on the pole piece from the pole piece to obtain a pole piece that has been preliminarily separated. The spraying mechanism 602 includes a spraying device 605 and a liquid collecting container 606 that are arranged opposite to each other. The spraying device 605 is used to spray the separation liquid on the pole piece that has been preliminarily separated to remove the active powder remaining on the pole piece that has been preliminarily separated. The liquid collecting container 606 is used to collect the separation liquid containing the active powder.

[0053] Exemplarily, the holding barrel 603 can be made of organic materials, which have good properties of easy degradation and corrosion resistance, and are easy to manufacture at low cost. In order to prevent cracking or deformation, the barrel wall can be set to have a certain thickness to improve its structural strength and stability. The holding barrel 603 has an opening, which is convenient for the pole piece and the stirring device to enter the holding barrel 603 from the opening. Optionally, a barrel cover can be set at the opening to ensure that the material in the barrel does not splash or leak out. The inner cavity of the holding barrel 603 can be cylindrical, which is convenient for the stirring device to stir. The separation liquid can be water, which reduces pollution to the environment and reduces costs while dissolving the binder. The spray device 605 can be at least one of a spray tower, a sprayer or a spray gun, which can be selected as needed.

[0054] In the technical solution of the embodiment of the present application, a stirring mechanism 601 is provided to stir the separation liquid to dissolve the binder on the electrode plate, so as to preliminarily separate the powder on the plate. In addition, the spraying mechanism 602 sprays the preliminarily separated plate, which can increase the pressure on the plate to separate the powder with relatively strong adhesion, and further improve the separation efficiency of the powder. Compared with crushing multiple plates and then separating them, the separation equipment of the present application improves the efficiency of the powder through secondary separation, eliminates the process of crushing the plate, reduces the production cost and improves the separation efficiency.

[0055] like Figure 5 As shown, in some embodiments of the present application, the electrode powder separation device 6 further includes a filtering device 607, which is used to filter the active powder in the separation liquid containing the active powder. The above structure, by setting the filtering device 607, filters and extracts the powder in the separation liquid, improves the extraction efficiency and purity of the active powder, and reduces the content of the active powder in the separation liquid, so that the separation liquid can be reused, reducing costs and improving the recycling efficiency of the separation liquid.

[0056] like Figure 5 as well as Figure 6 As shown, in some embodiments of the present application, the electrode powder separation device 6 further includes a filter basket 608, which is disposed in the receiving barrel 603, and is provided with a plurality of filter holes 609, and the filter basket 608 is used to communicate with the inner cavity of the receiving barrel 603, and the filter basket 608 is used to receive the electrode. The size of the filter hole 609 is smaller than the size of the electrode, and the electrode cannot pass through the filter hole 609, and the separation liquid can flow out from the filter hole 609.

[0057] In the above structure, the filter basket 608 is arranged in the receiving barrel 603, and is used to filter and separate the electrode and the separation liquid. The filter holes 609 are distributed on the filter basket 608, allowing the separation liquid to pass through but preventing the electrode from passing through. Therefore, the electrode can be quickly separated from the separation liquid and the electrode that has been preliminarily separated can be extracted from the receiving barrel 603, reducing the time for extracting the electrode and improving the efficiency of subsequent secondary separation of the electrode that has been preliminarily separated.

[0058] In some embodiments of the present application, the filter basket 608 includes a main body 610 and a support block 611 protruding outward along the circumference of the main body 610, the filter hole 609 is provided in the main body 610, and the support block 611 is used to overlap the opening edge of the containing barrel 603 to detachably connect the main body 610 and the containing barrel 603.

[0059] In the above structure, the protruding support block 611 not only increases the overall structural strength of the filter basket 608, but also facilitates the connection with the holding barrel 603. Through simple overlap, the filter basket 608 can be quickly installed on the holding barrel 603, simplifying the operation process. The filter basket 608 can be easily taken out from the holding barrel 603 without the need for tedious disassembly work. This flexibility provides great convenience when the filter basket 608 needs to be frequently replaced or cleaned, and can improve work efficiency. The filter hole 609 is provided on the body 610, ensuring that the separation liquid can flow out quickly through the filter hole 609, while the electrode remains in the filter basket 608, realizing effective solid-liquid separation. Therefore, the above structure reduces the time for extracting the electrode and improves the efficiency of subsequent secondary separation of the electrode after preliminary separation.

[0060] like Figure 7 As shown, in some embodiments of the present application, the liquid collecting container 606 has a concave receiving groove 612, the liquid collecting container 606 is used to support the filter basket 608, and the receiving groove 612 is used to receive the separation liquid.

[0061] In the above technical solution, the liquid collecting container 606 is used to support the filter basket 608, which ensures the stability and reliability of the filter basket 608 during the spraying process and avoids the problem of the separation effect being affected by the shaking of the filter basket 608. The receiving tank 612 is used to hold the separation liquid, which enables the separation liquid after spraying to be collected centrally, facilitates subsequent processing and recycling, and improves the utilization rate of the separation liquid. By placing the filter basket 608 directly on the liquid collecting container 606, the electrode piece that has been preliminarily separated can be directly sprayed, which not only simplifies the operation process, but also improves the separation efficiency of the powder. Due to the coordinated use of the liquid collecting container 606 and the receiving tank 612, additional installation and adjustment steps can be omitted, making the entire operation process more convenient and efficient. Therefore, by setting the receiving tank 612 in the liquid collecting container 606, stable support for the filter basket 608, effective collection of the separation liquid, efficient separation of the powder and simplification of the operation process can be achieved. This structure not only improves production efficiency and the separation effect of the active powder, but also reduces production costs.

[0062] In some embodiments of the present application, the stirring assembly 604 includes a rotary motor 613 and a stirring paddle 614. One end of the stirring paddle 614 is connected to the rotary motor 613, and the other end of the stirring paddle 614 extends into the containing barrel 603 to stir the separation liquid and the electrode.

[0063] Exemplarily, the end of the stirring paddle 614 away from the rotating motor 613 is bent toward the wall of the containing barrel 603, which can expand the stirring range of the stirring paddle 614 and improve the stirring and mixing efficiency.

[0064] In the above structure, a rotating motor 613 is used for stirring. Using the rotating motor 613 as a power source can ensure that the stirring paddle 614 obtains continuous and stable rotational power, thereby improving the stirring efficiency. The precise control of the motor also ensures that the stirring speed is moderate, thereby avoiding the separation efficiency being affected by stirring too fast or too slow. In addition, the stirring paddle 614 can extend into the containing barrel 603. This design ensures all-round and uniform stirring of the pole piece and the separation liquid in the barrel. In particular, for the separation liquid at the bottom of the barrel, due to the in-depth design of the stirring paddle 614, it can be ensured that the material at the bottom can also be fully stirred, thereby avoiding the appearance of dead corners. Therefore, the above technical solution improves the separation efficiency and simplifies the operation process.

[0065] In some embodiments of the present application, the filtering device 607 includes a filter press. In the above technical solution, the precise filter screen or filter cloth of the filter press can ensure the effective separation of the active powder and the separation liquid, greatly improving the separation efficiency. The filter press also has the function of squeezing the active powder. By squeezing, the excess liquid components in the active powder can be removed, further improving the purity of the extraction. Incorporating the filter press into the electrode powder separation device 6 not only simplifies the operation process, but also provides higher integration and stability for the overall equipment.

[0066] In some embodiments of the present application, the containing barrel 603 includes an inlet 615 and an outlet 616 , the liquid collecting container 606 has a liquid outlet 617 , a first connecting pipe 618 is connected between the liquid outlet 617 and the inlet 615 , and a first control valve 619 is provided on the first connecting pipe 618 .

[0067] In the above structure, the first connecting pipe 618 connects the liquid outlet 617 and the inlet 615, realizing the connection between the liquid collecting container 606 and the holding barrel 603. This allows the separation liquid to flow directly from the liquid collecting container 606 into the holding barrel 603, simplifying the process and improving efficiency. The setting of the first control valve 619 further enhances the controllability of the entire system. By adjusting the control valve, the flow rate and speed of the separation liquid flowing into the holding barrel 603 can be controlled to meet the needs under different production conditions. In addition, the separation liquid can be recycled, which improves its utilization efficiency. This not only saves resources, but also helps to reduce the generation of waste liquid. Therefore, the above design makes full use of the separation liquid, improves its recycling rate, and realizes the effective use of resources. At the same time, this structure also simplifies the operating process and brings many conveniences to industrial production.

[0068] In some embodiments of the present application, the filter device 607 includes a liquid inlet 620, a second connecting pipe 621 is connected between the liquid inlet 620 and the liquid outlet 617, and a second control valve 622 is provided on the second connecting pipe 621. In the above structure, by providing the second connecting pipe 621, the filter device 607 is connected with the liquid collecting container 606, the separation liquid in the filter device 607 is filtered, and the active powder in the separation liquid is extracted, thereby improving the efficiency of extracting the active powder in the separation liquid.

[0069] In some embodiments of the present application, the filter device 607 has a drain port 623, a third connecting pipe 624 is connected between the drain port 623 and the inlet 615, and a third control valve is provided on the third connecting pipe 624. The above structure connects the filter device 607 with the holding barrel 603 by providing the third connecting pipe 624, inputs the filtered separation liquid into the holding barrel 603, reuses the separation liquid, improves the recycling rate of the separation liquid, and reduces the cost.

[0070] In some embodiments of the present application, the outlet 616 is connected to the liquid inlet 620, so that the separated liquid in the filter barrel can be directly filtered, thereby improving the convenience and efficiency of extracting active powder from the separated liquid.

[0071] like Figure 8As shown, in some optional embodiments, the electrode powder separation device 6 includes a stirring mechanism 601 and a spraying mechanism 602. The stirring mechanism 601 includes a holding barrel 603 and a stirring assembly 604. The holding barrel 603 is used to hold the separation liquid and the electrode. The stirring assembly 604 is used to stir the separation liquid and the electrode to separate at least part of the active powder on the electrode from the electrode to obtain a preliminarily separated electrode. The spraying mechanism 602 includes a spraying device 605 and a liquid collecting container 606 arranged opposite to each other. The spraying device 605 is used to spray the separation liquid on the preliminarily separated electrode to remove the active powder remaining on the preliminarily separated electrode. The liquid collecting container 606 is used to collect the separation liquid containing the active powder. The electrode powder separation device 6 also includes a filtering device 607. The filtering device 607 is used to filter the active powder in the separation liquid containing the active powder. The electrode powder separation device 6 also includes a filter basket 608, which is arranged in the receiving barrel 603. The filter basket 608 is provided with a plurality of filter holes 609. The filter basket 608 is used to communicate with the inner cavity of the receiving barrel 603, and the filter basket 608 is used to accommodate the electrode. The filter basket 608 includes a body 610 and a support block 611 protruding outward along the circumference of the body 610. The filter holes 609 are provided in the body 610. The support block 611 is used to overlap the opening edge of the receiving barrel 603 to detachably connect the body 610 to the receiving barrel 603. The liquid collecting container 606 has a concave receiving groove 612. The liquid collecting container 606 is used to support the filter basket 608, and the receiving groove 612 is used to accommodate the separation liquid. The stirring assembly 604 includes a rotating motor 613 and a stirring paddle 614. One end of the stirring paddle 614 is connected to the rotating motor 613, and the other end of the stirring paddle 614 extends into the holding barrel 603 to stir the separation liquid and the pole piece. The end of the stirring paddle 614 away from the rotating motor 613 is bent toward the wall of the holding barrel 603. The filtering device 607 includes a filter press. The holding barrel 603 includes an inlet 615 and an outlet 616. The liquid collecting container 606 has a liquid outlet 617. A first connecting pipe 618 is connected between the liquid outlet 617 and the inlet 615. A first control valve 619 is provided on the first connecting pipe 618. The filtering device 607 includes a liquid inlet 620. A second connecting pipe 621 is connected between the liquid inlet 620 and the liquid outlet 617. A second control valve 622 is provided on the second connecting pipe 621. The filtering device 607 has a liquid discharge port 623. A third connecting pipe 624 is connected between the liquid discharge port 623 and the inlet 615. A third control valve is provided on the third connecting pipe 624.

[0072] The steps of using the above-mentioned electrode powder separation device 6 to separate and recycle the electrode plates include:

[0073] Inject the separation liquid into the holding barrel 603, place the pole piece in the filter basket 608, and place the filter basket 608 and the pole piece into the holding barrel 603;

[0074] Turning on the rotating motor 613 to drive the stirring paddle 614 to stir the separation liquid and the electrode in the containing barrel 603, so as to separate at least part of the active powder on the electrode from the electrode;

[0075] After a preset stirring time, the filter basket 608 is taken out of the containing barrel 603 and moved to the liquid collecting container 606, and the spraying device 605 is turned on to spray the initially separated electrode pieces in the filter barrel; illustratively, the preset stirring time may be 2 minutes to 5 minutes;

[0076] Open the first control valve 619, and input the sprayed separation liquid into the holding barrel 603 through the first connecting pipe 618 for reuse, until the concentration of active powder in the separation liquid is high before the next operation; or close the first control valve 619 and open the second control valve 622, input the sprayed separation liquid into the press for direct pressure filtration, and input the separation liquid in the liquid collecting container 606 into the filter press for pressure filtration to obtain the separated separation liquid and the active powder blocks pressed into cakes;

[0077] The third control valve is opened to input the separated separation liquid into the holding barrel 603 so as to recycle the separation liquid to continue stirring and separating other electrodes.

[0078] The embodiment of the present application also provides a battery material recycling system, which includes the electrode powder separation device 6 in the above embodiment, and the stirring mechanism 601 is set to stir the separation liquid to dissolve the binder on the electrode electrode to perform preliminary separation of the powder on the electrode. In addition, the spraying mechanism 602 sprays the electrode after preliminary separation, which can increase the pressure on the electrode to separate the powder with relatively strong adhesion, and further improve the separation efficiency of the powder. Compared with crushing multiple electrode pieces and then separating them, the equipment of the present application improves the efficiency of the powder through secondary separation, eliminates the process of crushing the electrode pieces, reduces production costs and improves separation efficiency.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A pole piece powder separation device (6), characterized in that: include: The stirring mechanism (601) comprises a containing barrel (603) and a stirring assembly (604), wherein the containing barrel (603) is used to contain the separation liquid and the electrode piece, and the stirring assembly (604) is used to stir the separation liquid and the electrode piece to separate at least part of the active powder on the electrode piece from the electrode piece, so as to obtain an electrode piece that has been preliminarily separated; The spray mechanism (602) comprises a spray device (605) and a liquid collecting container (606) arranged opposite to each other, wherein the spray device (605) is used to spray the separation liquid onto the electrode pieces that have undergone preliminary separation to remove the active powder remaining on the electrode pieces that have undergone preliminary separation, and the liquid collecting container (606) is used to collect the separation liquid containing the active powder.

2. The electrode powder separation device (6) according to claim 1, characterized in that: The electrode powder separation device (6) further comprises a filtering device (607), wherein the filtering device (607) is used to filter the active powder in the separation liquid containing the active powder.

3. The electrode powder separation device (6) according to claim 2, characterized in that: The electrode powder separation device (6) also includes a filter basket (608), which is arranged in the receiving barrel (603). The filter basket (608) is provided with a plurality of filter holes (609). The filter basket (608) is used to communicate with the inner cavity of the receiving barrel (603), and the filter basket (608) is used to accommodate the electrode.

4. The electrode powder separation device (6) according to claim 3, characterized in that: The filter basket (608) comprises a main body (610) and a support block (611) protruding outwardly along the circumference of the main body (610); the filter hole (609) is provided on the main body (610); the support block (611) is used to overlap the opening edge of the containing barrel (603) so as to detachably connect the main body (610) and the containing barrel (603).

5. The electrode powder separation device (6) according to claim 4, characterized in that: The liquid collecting container (606) has an inwardly concave receiving groove (612), the liquid collecting container (606) is used to support the filter basket (608), and the receiving groove (612) is used to receive the separation liquid.

6. The electrode powder separation device (6) according to claim 4, characterized in that: The stirring assembly (604) comprises: Rotating motor (613); A stirring paddle (614) has one end connected to the rotating motor (613) and the other end extending into the containing barrel (603) to stir the separation liquid and the pole piece.

7. The electrode powder separation device (6) according to any one of claims 2 to 6, characterized in that: The filtering device (607) comprises a filter press.

8. The electrode powder separation device (6) according to any one of claims 4 to 6, characterized in that: The containing barrel (603) comprises an inlet (615), the liquid collecting container (606) has a liquid outlet (617), a first connecting pipe (618) is connected between the liquid outlet (617) and the inlet (615), and a first control valve (619) is provided on the first connecting pipe (618).

9. The electrode powder separation device (6) according to claim 8, characterized in that: The filtering device (607) comprises a liquid inlet (620), a second connecting pipe (621) is connected between the liquid inlet (620) and the liquid outlet (617), and a second control valve (622) is provided on the second connecting pipe (621).

10. The electrode powder separation device (6) according to claim 9, characterized in that: The filtering device (607) has a liquid discharge port (623), a third connecting pipe (624) is connected between the liquid discharge port (623) and the inlet (615), and a third control valve is provided on the third connecting pipe (624).

11. A battery material recycling system, characterized in that: It comprises the pole piece powder separation device (6) as claimed in any one of claims 1 to 10.

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