Screening equipment and battery manufacturing equipment

Abstract

The embodiment of the utility model provides screening equipment and battery manufacturing equipment. The screening equipment comprises a rack, a slurry mixing unit and a screening unit, the slurry mixing unit is arranged on the rack, and the slurry mixing unit is used for stirring and mixing water and powder into slurry; the screening unit is connected with the slurry mixing unit and used for stirring the slurry again and screening out foreign matter particles in the slurry; the screening unit comprises a screening container, a screen and a first stirring mechanism, and the screening container is arranged on the rack, connected with the slurry mixing unit and used for receiving slurry discharged by the slurry mixing unit; the screen is arranged in the screening container and is connected with the screening container; the first stirring mechanism is used for stirring the slurry in the screening container so as to screen out foreign matter particles in the slurry on the screen; the screening container is rotatably mounted on the frame. According to the technical scheme, the metal particles in the battery powder can be effectively screened out, the accuracy of the quantitative detection result of the metal particles is improved, and then the manufacturing efficiency of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a screening device and a battery manufacturing device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become a crucial component of this sustainable development. Battery technology is a crucial factor in the development of electric vehicles. Improving battery manufacturing efficiency is a pressing technical challenge in battery technology.

[0003] During battery manufacturing, metal particles in battery powder (positive and negative electrode materials and other auxiliary materials) can affect battery reliability. Therefore, quantitative detection of metal particles in positive and negative electrode materials and auxiliary materials is necessary. However, current screening equipment has low screening efficiency and inaccurate quantitative detection, resulting in low battery manufacturing efficiency. Utility Model Content

[0004] The present application provides a screening device and a battery manufacturing device, which can effectively screen out metal particles in battery powder, improve the accuracy of the quantitative detection results of metal particles, and thus improve the manufacturing efficiency of the battery.

[0005] This application is achieved through the following technical solutions:

[0006] In the first aspect, an embodiment of the present application provides a screening device, which includes a frame, a slurry mixing unit and a screening unit. The slurry mixing unit is arranged on the frame, and the slurry mixing unit is used to stir and mix water and powder into slurry; the screening unit is connected to the slurry mixing unit, and is used to stir the slurry again and screen out foreign particles in the slurry; the screening unit includes a screening container, a screen and a first stirring mechanism, the screening container is arranged on the frame, and is connected to the slurry mixing unit, and is used to receive the slurry discharged by the slurry mixing unit; the screen is arranged in the screening container and is connected to the screening container; the first stirring mechanism is used to stir the slurry in the screening container to screen out foreign particles in the slurry on the screen; wherein, the screening container is rotatably mounted on the frame.

[0007] In this solution, the slurry mixing unit stirs water and powder into slurry. After the slurry is discharged into the screening unit, the first stirring mechanism in the screening unit is set, and the screening container is rotatably installed on the frame. While the first stirring mechanism stirs the slurry in the screening container, the screening container is rotated to drive the screen to rotate synchronously. Under the action of the rotation of the screen, the slurry on the screen can be further driven to move relative to the screen, thereby improving the activity of the slurry on the screen. The slurry on the screen is not prone to disturbance blind spots, which improves the sedimentation of the slurry. The slurry is not easily blocked on the screen, which improves the efficiency of the powder passing through the screen. Compared with stirring only by the first stirring mechanism, foreign particles (i.e., metal particles) in the slurry can be screened out more effectively and quickly, reducing the risk of inaccurate quantitative detection results caused by the screening unit being blocked by agglomerated powder, resulting in the screened metal particles being mixed with powder, thereby effectively improving the manufacturing efficiency of the battery. That is, the function of rotatable screen is added to the screening unit. Under the dual action of screen rotation and the first stirring mechanism, the screen can more effectively and quickly screen out foreign particles in the slurry, thereby improving the accuracy of the quantitative detection results of metal particles, and thus effectively improving the manufacturing efficiency of the battery.

[0008] According to some embodiments of the present application, the screening unit also includes a first drive unit, the first drive unit includes a first drive member and a transmission member, the first drive member is installed on the frame, the transmission member connects the first drive mechanism and the screening container, and the first drive member is used to drive the screening container to rotate relative to the frame.

[0009] In the above solution, the first drive unit is configured to drive the screening container and the screen to rotate together. Compared to manually rotating the screening container, this solution is more labor-saving and more automated. The first drive unit also enables the rotation speed of the screening container to be controllable, thereby improving the screening efficiency of the screening unit. The transmission member plays a transmission role. The first drive member drives the transmission member to rotate, thereby driving the screening container connected to the transmission member to rotate, thereby realizing the rotation function of the screening container.

[0010] According to some embodiments of the present application, the screening equipment also includes a waste liquid discharge unit, which is installed on the frame; along the direction of gravity, the waste liquid discharge unit is located on the lower side of the screening container; the transmission part includes a slewing bearing, and the slewing bearing has an avoidance hole for avoiding the waste liquid discharge unit.

[0011] In the above scheme, by adopting a slewing bearing as the transmission part, the slewing bearing can provide support for the screening container, which not only makes the screening container more stable during rotation, but also the avoidance hole in the middle of the slewing bearing can be used for the waste liquid discharge unit to be set, which is beneficial to the spatial layout of the waste liquid discharge unit.

[0012] According to some embodiments of the present application, the rotation direction of the screening container is set in the same direction as the rotation direction of the first stirring mechanism.

[0013] In the above scheme, by setting the rotation direction of the screening container in the same direction as the rotation direction of the first stirring mechanism, the risk of slurry splashing when the first stirring mechanism stirs the slurry in the screening container can be reduced while maintaining the screening efficiency of the screening unit for the slurry.

[0014] According to some embodiments of the present application, the first stirring mechanism includes a first stirring driving member and a first stirring member. The first stirring driving member is installed on the frame and is used to drive the first stirring member to rotate to stir the slurry.

[0015] In the above solution, the first stirring mechanism has a simple structure and is easy to manufacture. The first stirring member can be driven by the first stirring driving member to stir the first stirring member, thereby effectively destroying the powder deposited on the screen surface, improving the efficiency of the powder passing through the screen, and thus improving the screening efficiency.

[0016] According to some embodiments of the present application, the rotation axis of the screening container is arranged parallel to the rotation axis of the first stirring member.

[0017] In the above scheme, by arranging the rotation axis of the screening container parallel to the rotation axis of the first stirring member, that is, the first stirring member is eccentrically arranged in the screening container, and utilizing the rotatable function of the screening container, the positive projection area of ​​the first stirring member on the screen can be reduced, and the screen does not need to be completely covered, so that the first stirring member can meet the screening requirements of the screening unit with a smaller volume, and the screening unit structure is simpler.

[0018] According to some embodiments of the present application, on the same projection plane perpendicular to the direction of gravity, the orthographic projection of the first stirring member is located within the orthographic projection of the screening container, the radial size of the orthographic projection of the first stirring member in the screening container is not less than the radius of the screening container, and there is a gap between the first stirring member and the inner wall of the screening container.

[0019] In the above scheme, the size of the positive projection of the first stirring member in the radial direction of the screening container is not less than the radius of the screening container, and there is a gap between the first stirring member and the inner wall of the screening container. In this way, when the screen rotates, the first stirring member can cover all areas of the surface where the screen is located, that is, under the premise of the screen rotating, the first stirring member can stir each area on the screen one by one, effectively improving the phenomenon of powder sedimentation, thereby improving the efficiency of the powder passing through the screen, reducing the risk of inaccurate quantitative detection results due to the screening unit being blocked by agglomerated powder or the existence of a stirring blind spot, resulting in the screened metal particles being mixed with powder, thereby effectively improving the manufacturing efficiency of the battery.

[0020] According to some embodiments of the present application, the first stirring member includes a first stirring shaft and a plurality of stirring grips, the first stirring shaft is connected to the first stirring drive member, and the plurality of stirring grips are distributed at intervals along the circumference of the first stirring shaft; one end of the stirring grip is connected to the first stirring shaft, and the other end is arranged to be inclined downward toward the side away from the first stirring shaft.

[0021] In the above scheme, multiple stirring grippers are distributed on the circumference of the first stirring shaft. Under the rotation of the first stirring shaft, the multiple stirring grippers work together to effectively destroy the powder deposited on the surface of the screen, thereby improving the efficiency of the powder passing through the screen.

[0022] According to some embodiments of the present application, the stirring handle is made of a flexible material.

[0023] In the above scheme, by using a flexible material for the stirring grip, when the first stirring mechanism stirs the powder on the screen, the lower end of the first stirring member can contact the screen and have a certain pre-pressure. The flexible material stirring grip can deform itself, reducing the impact force on the screen. During the rotation of the stirring grip, the stirring grip can cause the screen to have a slight downward extrusion deformation in the direction of gravity in the area where the stirring grip contacts the stirring grip. The screen then rotates until the stirring grip separates from the area it just contacted, and then the screen resets, causing a local area of ​​the screen to have a slight vibration deformation, making the powder deposited on the screen easier to shake, which can effectively improve the screening efficiency of the screening unit. In addition, the stirring grip is made of a non-metallic material, which can also reduce the impact of metal particles generated by the impact of the first stirring member on the metal particle quantitative detection results of the battery powder during operation, thereby effectively improving the accuracy of the metal particle quantitative detection results, and further improving the manufacturing efficiency of the battery.

[0024] According to some embodiments of the present application, the first stirring mechanism is movably provided on the frame along a first direction to switch between a first position in which the first stirring mechanism extends into the screening container and a second position in which the first stirring mechanism is detached from the screening container, and the first direction is parallel to the axis of the screening container.

[0025] In the above scheme, by movably arranging the first stirring mechanism on the frame, the first stirring mechanism can be switched between the first position and the second position, so that the first stirring mechanism can act on the screen in the first position to stir the slurry, assist water and powder to flow through the screen, and improve the efficiency of metal particle screening, or make it easier to remove and collect metal particles in the screen when the first stirring mechanism is in the second position.

[0026] According to some embodiments of the present application, the screening equipment also includes a connecting pipe, which connects the screening container and the slurry mixing unit. The connecting pipe is used to transport the slurry from the slurry mixing unit to the screening container, and the connecting pipe is extended along the direction of gravity; on the same projection plane perpendicular to the direction of gravity, the orthographic projection of the screening container and the orthographic projection of the slurry mixing unit at least partially overlap.

[0027] In the above solution, the connection pipe allows the slurry from the slurry mixing unit to flow into the screening container. The connection pipe extends in the direction of gravity, allowing the slurry to flow from the slurry mixing unit into the screening container under the action of gravity, thereby reducing the risk of material jamming and incomplete rinsing. Furthermore, on the same projection plane perpendicular to the direction of gravity, the orthographic projection of the screening container and the orthographic projection of the slurry mixing unit at least partially overlap, resulting in a small screening device with a small footprint and a more compact structure.

[0028] According to some embodiments of the present application, the slurry mixing unit includes a stirring container and a second stirring mechanism. The stirring container is arranged on a frame. The stirring container has a feeding port for supplying water and powder into the stirring container. The second stirring mechanism is used to stir and mix the water and powder in the stirring container into a slurry.

[0029] In the above scheme, by setting the feeding port of the stirring container, water and powder can be quickly added into the stirring container, and can be mixed into a uniform slurry under the action of the second stirring mechanism, so that it can be effectively screened by the screening unit in the subsequent screening process.

[0030] In a second aspect, an embodiment of the present application further provides a battery manufacturing device, which includes the screening device of any of the aforementioned embodiments.

[0031] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 This is a schematic structural diagram of the screening equipment according to some embodiments of the present application;

[0034] Figure 2 This is a schematic structural diagram of a screening unit in a screening device in some embodiments of the present application;

[0035] Figure 3 for Figure 2 Cross-sectional view of AA;

[0036] Figure 4 This is a schematic structural diagram of a first stirring mechanism in a screening device in some embodiments of the present application;

[0037] Figure 5 A front view of a first stirring mechanism in a screening device according to some embodiments of the present application;

[0038] Figure 6 for Figure 5 Cross-sectional view of the middle BB;

[0039] Figure 7 This is a schematic structural diagram of the second stirring mechanism in the screening equipment of some embodiments of the present application.

[0040] Icons: 100-screening equipment; 10-frame; 11-moving wheel; 12-operating button; 13-first opening; 20-screening unit; 21-screening container; 211-feeding port; 22-screen; 23-first stirring mechanism; 231-first stirring drive member; 2311-mounting seat; 2312-stirring motor; 2313-first synchronous pulley; 2314-second synchronous pulley; 2315-synchronous belt; 2316-bearing; 2317-shield; 2318-fastening sleeve; 2319-threaded hole; 232-first stirring member; 2321-first stirring shaft; 2322-stirring gripper; 24-first drive unit ;241-first driving member;242-transmission member;2421-rotating bearing;243-connecting member;2431-connecting column;2432-mounting plate;30-slurry mixing unit;31-stirring container;311-feeding port;32-second stirring mechanism;321-second stirring motor;322-second stirring member;3221-second stirring shaft;3222-stirring blade;323-support frame;40-waste liquid discharge unit;50-connecting pipe;51-valve;60-first limit member;61-guardrail;62-limiting rod;70-flushing unit;71-flexible pipe;72-flushing nozzle;80-water supply pipeline. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0043] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0046] The term "multiple" in this application 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).

[0047] In this application, the battery may include a lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., and the embodiments of this application are not limited to this. The battery may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application are not limited to this.

[0048] A battery includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive electrode collector. The portion of the positive electrode collector not coated with the positive active material layer protrudes from the portion coated with the positive active material layer, and the portion of the positive electrode collector not coated with the positive active material layer serves as the positive tab. For lithium-ion batteries, for example, the positive electrode current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative electrode collector. The portion of the negative electrode collector not coated with the negative active material layer protrudes from the portion coated with the negative active material layer, and the portion of the negative electrode collector not coated with the negative active material layer serves as the negative tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene). The separator provides electronic insulation, separating the adjacent positive and negative electrodes to prevent short circuits. The separator has numerous micropores that allow the free passage of electrolyte ions and offers excellent permeability to lithium ions.

[0049] During the manufacturing process of batteries, the raw materials of the active material layer, the raw materials of the adhesive, or the raw materials of other auxiliary materials in the battery are usually in powder form, which is called battery powder. During the production process, the battery powder will come into contact with components such as copper, iron, zinc, and stainless steel. Due to the wear of metal components and other process factors, foreign particles (also known as metal particles) are present in the positive and negative electrode materials and other auxiliary materials of the lithium battery, such as copper, iron, zinc, stainless steel, and metal oxides. Metal particles may pierce the diaphragm, causing thermal runaway and resulting in low battery reliability. Therefore, in order to improve the reliability of the battery, screening equipment is used to screen the battery powder before the battery manufacturing process to quantitatively detect the metal particles in the battery powder.

[0050] Currently, screening equipment feeds water and powder mixed with metal particles directly onto the screen. However, the powder and water tend to agglomerate, clogging the screen. The sieved material, in addition to containing metal particles, also contains powder. This prevents the screening equipment from accurately separating the metal particles, leading to inaccurate and highly volatile quantitative metal particle detection results. This necessitates multiple tests to verify the accuracy of the quantitative results, which in turn impacts battery manufacturing efficiency.

[0051] In view of this, in order to solve the problem that powder easily agglomerates, causing the agglomerated powder to clog the screen, resulting in inaccurate quantitative detection results of metal particles and affecting the manufacturing efficiency of batteries, an embodiment of the present application provides a screening device, which includes a frame, a slurry mixing unit and a screening unit. The slurry mixing unit is arranged on the frame and is used to mix water and powder into slurry; the screening unit includes a screening container, a screen and a first stirring mechanism. The screening container is arranged on the frame and connected to the slurry mixing unit, and is used to receive the slurry discharged from the slurry mixing unit; the screen is arranged in the screening container; the first stirring mechanism is used to stir the slurry in the screening container to screen out foreign particles in the slurry on the screen; the screening container is rotatably mounted on the frame along its axis.

[0052] In such screening equipment, by setting the first stirring mechanism in the screening unit and the screening container being rotatably mounted on the frame, while the first stirring mechanism stirs the slurry in the screening container, the screening container is rotated to drive the screen to rotate synchronously. Under the action of the rotation of the screen, the slurry on the screen can be further driven to move relative to the screen, thereby improving the activity of the slurry on the screen. The slurry on the screen is not prone to disturbance blind spots, thereby improving the sedimentation of the slurry, and the slurry is not easily blocked on the screen, thereby improving the efficiency of the powder passing through the screen, and can more effectively and quickly screen out foreign particles (i.e., metal particles) in the slurry, thereby reducing the risk of inaccurate quantitative detection results caused by the screening unit being blocked by agglomerated powder, resulting in the screened metal particles being mixed with powder, thereby effectively improving the manufacturing efficiency of the battery.

[0053] This application embodiment provides a screening device, please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 This is a schematic structural diagram of the screening equipment according to some embodiments of the present application; Figure 2 This is a schematic structural diagram of a screening unit in a screening device in some embodiments of the present application; Figure 3 for Figure 2The screening device 100 includes a frame 10, a slurry mixing unit 30, and a screening unit 20. The slurry mixing unit 30 is provided on the frame 10 and is used to mix water and powder into slurry. The screening unit 20 is connected to the slurry mixing unit 30 and is used to stir the slurry again and screen out foreign particles in the slurry. The screening unit 20 includes a screening container 21, a screen 22, and a first stirring mechanism 23. The screening container 21 is provided on the frame 10 and is connected to the slurry mixing unit 30, and is used to receive the slurry discharged from the slurry mixing unit 30. The screen 22 is provided in the screening container 21 and is connected to the screening container 21. The first stirring mechanism 23 is used to stir the slurry in the screening container 21 to screen out foreign particles in the slurry on the screen 22. The screening container 21 is rotatably mounted on the frame 10.

[0054] The slurry mixing unit 30 is a device that can mix water and powder into a slurry. A water supply pipeline 80 is provided on the frame 10, and the water supply pipeline 80 is provided with a liquid flow meter for controlling the flow of water. Water is supplied to the slurry mixing unit 30 through the water supply pipeline 80. After the powder is put into the slurry mixing unit 30, the slurry mixing unit 30 stirs the water and powder so that the water and powder are mixed into a uniform slurry. "Water" can refer to deionized water or distilled water. The powder has been quantitatively processed before being put into the slurry mixing unit 30, that is, the slurry mixing unit 30 of a determined quality is put into the slurry mixing unit 30.

[0055] The screening unit 20 is a device for screening out metal particles from the slurry. The screening unit 20 receives the slurry mixed and stirred by the slurry mixing unit 30 and stirs the slurry, for example, on a screen 22 on the screening unit 20, causing the slurry to flow through the screen 22, leaving the metal particles in the slurry on the screen 22.

[0056] Screening container 21 is a container for holding the slurry, and screen 22 is a mesh structure disposed within screening container 21. Screen 22 is connected to screening container 21 and can rotate synchronously with screening container 21 when screening container 21 rotates. Screen 22 is used to screen out metal particles in the slurry. In some embodiments, the diameter of screen 22 can be 20 cm, and the mesh size of screen 22 can be any value between 200 mesh and 2000 mesh, for example, 200 mesh, 201 mesh, 202 mesh, 1999 mesh, or 2000 mesh.

[0057] The frame 10 supports the slurry mixing unit 30 and the screening unit 20. The frame 10 can be formed by welding, bonding, or screwing together several steel components (e.g., square steel, steel plates, etc.). The frame 10 integrates the slurry mixing unit 30 and the screening unit 20, effectively reducing the footprint of the screening unit 20 and improving space utilization in a factory or laboratory.

[0058] The bottom of the frame 10 may be provided with moving wheels 11 with a locking function, which can facilitate the transfer of the screening device 100 according to usage requirements and has high flexibility.

[0059] The rotation axis of the screening container 21 coincides with the central axis of the screening container 21. The rotation of the screening container 21 can be driven in a variety of ways, either manually or by a motor, depending on the actual situation.

[0060] In this solution, the slurry mixing unit 30 stirs water and powder to form a slurry. After the slurry is discharged into the screening unit 20, the first stirring mechanism 23 in the screening unit 20 is set, and the screening container 21 is rotatably installed on the frame 10. While the first stirring mechanism 23 stirs the slurry in the screening container 21, the screening container 21 is rotated to drive the screen 22 to rotate synchronously. Under the action of the rotation of the screen 22, the slurry on the screen 22 can be further driven to move relative to the screen 22, thereby improving the slurry on the screen. The activity on 22 is improved, the slurry on the screen 22 is not prone to disturbance blind spots, the sedimentation of the slurry is improved, the slurry is not easily blocked on the screen 22, and the efficiency of the powder passing through the screen 22 is improved. Compared with the stirring by the first stirring mechanism 23 alone, the foreign particles (i.e., metal particles) in the slurry can be screened out more effectively and quickly, reducing the risk of inaccurate quantitative detection results due to the clogging of the screening unit 20 by the agglomerated powder, causing the screened metal particles to be mixed with the powder, thereby effectively improving the manufacturing efficiency of the battery. That is, the function of the rotatable screen 22 is added to the screening unit 20. Under the dual action of the rotation of the screen 22 and the first stirring mechanism 23, the screen 22 can more effectively and quickly screen out foreign particles in the slurry, thereby improving the accuracy of the quantitative detection results of the metal particles, thereby effectively improving the manufacturing efficiency of the battery.

[0061] According to some embodiments of this application, please refer to Figure 2 , Figure 2Schematic diagram of the structure of a screening unit in a screening device according to some embodiments of the present application. The screening unit 20 further includes a first drive unit 24, which includes a first drive member 241 and a transmission member 242. The first drive member 241 is mounted on the frame 10, and the transmission member 242 connects the first drive member 241 and the screening container 21. The first drive member 241 is used to drive the screening container 21 to rotate relative to the frame 10.

[0062] The first drive unit 24 is a drive mechanism that provides rotational functionality for the screening container 21. The first drive member 241, which can be a motor, is the component that drives the transmission member 242 to rotate. The transmission member 242 is the force transmission component between the first drive member 241 and the connecting member 243. The transmission member 242 can be a bearing 2316, a force transmission rod, or a base.

[0063] The first drive unit 24 may further include a connector 243, through which the screening container 21 is mounted on the transmission member 242. The connector 243 is a connecting component between the transmission member 242 and the screening container 21, and may be a support column, an annular support cylinder, or the like.

[0064] Optionally, the connector 243 may include a plurality of connecting posts 2431, which are spaced apart along the circumference of the screening container 21. For example, the connector 243 may include three connecting posts 2431, which are spaced apart along the circumference of the screening container 21, with one end of each connecting post 2431 connected to the screening container 21 and the other end connected to the transmission member 242. The screening container 21 is mounted on the transmission member 242 via the connector 243. The arrangement of the connector 243 creates a space between the transmission member 242 and the screening container 21, facilitating the subsequent arrangement of the waste liquid discharge unit 40.

[0065] To facilitate disassembly between the screening container 21 and the connector 243, the connector 243 may further include a mounting plate 2432 disposed between the connecting post 2431 and the screening container 21. The mounting plate 2432 is provided for mounting the screening container 21 and is detachably connected to the mounting plate 2432. For example, the screening container 21 and the mounting plate 2432 may be connected by a snap-fit, screw-fit, or plug-fit connection to facilitate assembly and disassembly of the screening container 21. The mounting plate 2432 has an opening corresponding to the discharge opening of the screening container 21.

[0066] The first drive unit 24 is configured to drive the screening container 21 and the screen 22 to rotate together. This is more labor-saving and more automated than manually rotating the screening container 21. Furthermore, the first drive unit 24 can control the rotation speed of the screening container 21, thereby improving the screening efficiency of the screening unit 20. The transmission member 242 acts as a transmission. The first drive member 241 drives the transmission member 242 to rotate, thereby driving the screening container 21 connected to the transmission member 242 to rotate, thereby achieving the rotation function of the screening container 21.

[0067] According to some embodiments of this application, please refer to Figure 2 The screening equipment 100 also includes a waste liquid discharge unit 40, which is installed on the frame 10; along the direction of gravity, the waste liquid discharge unit 40 is located on the lower side of the screening container 21; the transmission member 242 includes a slewing bearing 2421, and the slewing bearing 2421 has an avoidance hole for avoiding the waste liquid discharge unit 40.

[0068] The slewing bearing 2421 is also called a turntable bearing 2316, also known as a rotating support or a slewing support. The slewing bearing 2421 is arranged on the frame 10, the inner ring of the slewing bearing 2421 is fixed to the frame 10, and the outer ring of the slewing bearing 2421 is connected to the first driving member 241. A circular avoidance hole is formed in the hollow part of the inner ring of the slewing bearing 2421, and the avoidance hole can be used for the waste liquid discharge unit 40 to pass through to be connected to the frame 10.

[0069] The waste liquid discharge unit 40 includes a waste liquid container. The waste liquid container is located below and to one side of the screening container 21 in the direction of gravity. The waste liquid container has a liquid inlet that is connected to the outlet of the screening container 21. The waste liquid container is fixed to the frame 10. The liquid outlet of the waste liquid container can be connected to a waste liquid discharge pipe, through which the waste liquid in the waste liquid container is discharged.

[0070] By adopting the transmission member 242 as the slewing bearing 2421, the slewing bearing 2421 can provide support for the screening container 21, which not only makes the screening container 21 more stable during rotation, but also the avoidance hole in the middle of the slewing bearing 2421 can be used for the waste liquid discharge unit 40 to be set, which is beneficial to the spatial layout of the waste liquid discharge unit 40.

[0071] According to some embodiments of the present application, the rotation direction of the screening container 21 is set in the same direction as the rotation direction of the first stirring mechanism 23 .

[0072] The rotation direction of the screening container 21 and the rotation direction of the first stirring mechanism 23 are arranged in the same direction. This means that the rotation direction of the screening container 21 and the screen 22 is the same as the rotation direction of the first stirring mechanism 23. That is, when the screening container 21 rotates clockwise, the rotation direction of the first stirring mechanism 23 is also clockwise. When the screening container 21 rotates counterclockwise, the rotation direction of the first stirring mechanism 23 is also counterclockwise. The rotation speed of the screening container 21 and the rotation speed of the first stirring mechanism 23 do not need to be equal.

[0073] It should be noted that, since the first stirring mechanism 23 and / or the screening container 21 rotate at high speed, when the rotation direction of the screening container 21 is set opposite to the rotation direction of the first stirring mechanism 23, the slurry is more likely to splash out.

[0074] By setting the rotation direction of the screening container 21 in the same direction as the rotation direction of the first stirring mechanism 23, the risk of slurry splashing when the first stirring mechanism 23 stirs the slurry in the screening container 21 can be reduced while maintaining the good screening efficiency of the screening unit 20 for the slurry.

[0075] According to some embodiments of this application, please refer to Figure 4 、 Figure 5 and Figure 6 , Figure 4 This is a schematic structural diagram of a first stirring mechanism in a screening device in some embodiments of the present application; Figure 5 A front view of a first stirring mechanism in a screening device according to some embodiments of the present application; Figure 6 for Figure 5 The first stirring mechanism 23 includes a first stirring driving member 231 and a first stirring member 232. The first stirring driving member 231 is mounted on the frame 10 and is used to drive the first stirring member 232 to rotate so as to stir the slurry.

[0076] The first stirring driving member 231 is a driving member for rotating the first stirring member 232. The first stirring driving member 231 may include a mounting base 2311 and a stirring motor 2312. The mounting base 2311 is mounted on the frame 10, and the stirring motor 2312 is mounted on the mounting base 2311.

[0077] Of course, to improve the stability of the stirring motor 2312 during transmission, the first stirring drive member 231 may further include a synchronous belt mechanism, which is mounted on the mounting base 2311. The stirring motor 2312 drives the first stirring member 232 to rotate via the synchronous belt mechanism. The synchronous belt mechanism includes a first synchronous pulley 2313, a second synchronous pulley 2314, and a synchronous belt 2315 that is sleeved over the first and second synchronous pulleys 2313, 2314. The driving end of the stirring motor 2312 is drivingly connected to the first synchronous pulley 2313, which drives the second synchronous pulley 2314 to rotate via the synchronous belt 2315. The first and second synchronous pulleys 2313, 2314 are both rotatably mounted on the mounting base 2311 via bearings 2316. The first stirring member 232 is connected to the second synchronous pulley 2314. Rotation of the second synchronous pulley 2314 drives the first stirring member 232 to rotate. In some embodiments, a shield 2317 may be provided on the synchronous belt 2315 mechanism, and the shield 2317 is used to cover the second synchronous pulley 2314 and at least part of the synchronous belt 2315.

[0078] The first stirring mechanism 23 has a simple structure and is easy to manufacture. The first stirring member 232 is driven by the first stirring driving member 231 to stir the powder deposited on the surface of the screen 22, thereby improving the efficiency of the powder passing through the screen 22 and thus improving the screening efficiency.

[0079] According to some embodiments of the present application, at least a portion of the first stirring member 232 is located in the screening container 21 , and the rotation axis of the first stirring member 232 is arranged parallel to the rotation axis of the screening container 21 .

[0080] The rotation axis of the screening container 21 refers to the axis around which the screening container 21 rotates, that is, the central axis of the screening container 21. The rotation axis of the first stirring member 232 is arranged parallel to the rotation axis of the screening container 21, that is, the first stirring member 232 is eccentrically arranged in the screening container 21, and eccentrically stirs the slurry in the screening container 21.

[0081] By arranging the rotation axis of the screening container 21 parallel to the rotation axis of the first stirring member 232, that is, the first stirring member 232 is eccentrically arranged in the screening container 21, and utilizing the rotatable function of the screening container 21, the positive projection area of ​​the first stirring member 232 on the screen 22 can be reduced, and there is no need to completely cover the screen 22, so that the first stirring member 232 can meet the screening requirements of the screening unit 20 with a smaller volume, and the screening unit 20 has a simpler structure.

[0082] According to some embodiments of the present application, on the same projection plane perpendicular to the direction of gravity, the orthographic projection of the first stirring member 232 is located within the orthographic projection of the screening container 21, the radial size of the orthographic projection of the first stirring member 232 in the screening container 21 is not less than the radius of the screening container 21, and there is a gap between the first stirring member 232 and the inner wall of the screening container 21.

[0083] The inner wall of the screening container 21 refers to the inner circumferential wall of the screening container 21. The gap between the first stirring member 232 and the inner wall of the screening container 21 means that there is a gap between the first stirring member 232 and the inner wall of the screening container 21, and the gap can allow the first stirring member 232 to rotate relative to the screening container 21.

[0084] The dimension of the positive projection of the first stirring member 232 in the radial direction of the screening container 21 is not less than the radius of the screening container 21, and there is a gap between the first stirring member 232 and the inner wall of the screening container 21. In this way, when the screen 22 rotates, the first stirring member 232 can cover all areas of the surface where the screen 22 is located, that is, under the premise of the rotation of the screen 22, the first stirring member 232 can stir each area on the screen 22 one by one, effectively improving the phenomenon of powder sedimentation, thereby improving the efficiency of the powder passing through the screen 22, and reducing the risk of inaccurate quantitative detection results due to the screening unit 20 being blocked by agglomerated powder or the existence of a stirring blind spot, resulting in the screened metal particles being mixed with powder.

[0085] According to some embodiments of this application, please refer to Figure 4 The first stirring member 232 includes a first stirring shaft 2321 and a plurality of stirring grips 2322. The first stirring shaft 2321 is connected to the first stirring driving member 231, and the plurality of stirring grips 2322 are distributed at intervals along the circumference of the first stirring shaft 2321; one end of the stirring grip 2322 is connected to the first stirring shaft 2321, and the other end is inclined downward toward the side away from the first stirring shaft 2321.

[0086] The number of the stirring grips 2322 can be two, three, or four. In this embodiment, the number of the stirring grips 2322 is four, and the four stirring grips 2322 are evenly spaced around the circumference of the first stirring shaft 2321 and are located in the same plane in the axial direction of the first stirring shaft 2321.

[0087] By distributing multiple stirring grippers 2322 around the first stirring shaft 2321, the multiple stirring grippers 2322 cooperate with each other under the rotation of the first stirring shaft 2321 to effectively destroy the powder deposited on the surface of the screen 22 and improve the efficiency of the powder passing through the screen 22.

[0088] According to some embodiments of the present application, the stirring handle 2322 is made of a flexible material.

[0089] The flexible material can be a variety of flexible materials, for example, the flexible material can be polyurethane or rubber, etc. The material strength of the stirring grip 2322 is less than the material strength of the screen 22, which can effectively reduce the risk of the screen 22 being damaged.

[0090] By using a flexible material for the first stirring member 232, when the first stirring mechanism 23 stirs the powder on the screen 22, the lower end of the first stirring member 232 can contact the screen 22 and have a certain pre-pressure, and the stirring grip 2322 made of flexible material can deform itself to reduce the impact force on the screen 22. During the rotation of the stirring grip 2322, the stirring grip 2322 can drive the screen 22 and the area in contact with the stirring grip 2322 to have a slight downward extrusion deformation in the direction of gravity, and then the screen 22 rotates until the stirring grip 2322 separates from the area just contacted, and then the screen 22 is reset, so that the local area of ​​the screen 22 has a slight vibration deformation, so that the powder deposited on the screen 22 is easier to be shaken, which can effectively improve the screening efficiency of the screening unit 20. In addition, the stirring grip 2322 is made of non-metallic material, which can also reduce the impact of metal particles generated by the impact of the first stirring member 232 during operation of the screening equipment on the quantitative detection results of metal particles in the battery powder, thereby effectively improving the accuracy of the quantitative detection results of metal particles, and further improving the manufacturing efficiency of the battery.

[0091] According to some embodiments of the present application, the first stirring mechanism 23 is movably provided on the frame 10 along a first direction Z to switch between a first position in which the first stirring mechanism 23 extends into the screening container 21 and a second position in which the first stirring mechanism 23 is detached from the screening container 21, and the first direction Z is parallel to the axis of the screening container 21.

[0092] The first direction Z can be a vertical direction. The screening container 21 has a feed port 211 in the first direction Z. The first stirring mechanism 23 is movably disposed on the frame 10. The first stirring mechanism 23 can be switched between the first position and the second position relative to the frame 10 by manual drive or by a driving mechanism.

[0093] When the first stirring mechanism 23 is manually driven to move along the first direction Z on the frame 10, and the first stirring driving member 231 has a synchronous belt mechanism, the first stirring shaft 2321 in the first stirring member 232 is key-connected with the second synchronous pulley 2314, and the first stirring shaft 2321 can move along its axial direction relative to the second synchronous pulley 2314, that is, the first stirring shaft 2321 can move along the first direction Z, and the first stirring shaft 2321 cannot rotate relative to the second synchronous pulley 2314, thereby realizing the position switching of the first stirring mechanism 23 between the first position and the second position.

[0094] For details, please refer to Figure 5 and Figure 6 A fastening sleeve 2318 is provided on one side of the bottom of the second synchronous pulley 2314. A threaded hole 2319 is provided radially on the fastening sleeve 2318. A fastener is inserted through the threaded hole 2319. The fastener is threadedly engaged with the threaded hole 2319. One end of the fastener can pass through the fastening sleeve 2318 and abut against the outer circumferential wall of the first stirring shaft 2321, thereby securing the first stirring shaft 2321 and the second synchronous pulley 2314 in the first direction Z. Of course, the number of threaded holes 2319 can be multiple, and the multiple threaded holes 2319 can be distributed circumferentially on the fastening sleeve 2318. Correspondingly, the number of fasteners is also multiple.

[0095] When it is necessary to adjust the position of the first stirring shaft 2321 in the first direction Z, loosen the fastener. After the first stirring shaft 2321 loses the fastening effect of the fastener, the first stirring shaft 2321 can move along the first direction relative to the second synchronous pulley 2314. When the position of the first stirring shaft 2321 is moved into place, the position of the first stirring shaft 2321 can be locked by the fastener.

[0096] When the driving mechanism drives the first stirring mechanism 23 to move along the first direction Z on the frame 10, the screening unit 20 further includes a first lifting mechanism, which is disposed on the frame 10 and connected to the first stirring mechanism 23, and is used to drive the first stirring mechanism 23 to move along the first direction Z. The first lifting mechanism can be a driving mechanism such as a cylinder, a hydraulic cylinder, or a linear motor.

[0097] By movably arranging the first stirring mechanism 23 on the frame 10, the first stirring mechanism 23 can be switched between the first position and the second position, so that the first stirring mechanism 23 can act on the screen 22 in the first position to stir the slurry, assist water and powder to flow through the screen 22, and improve the efficiency of metal particle screening, or make it easier to remove and collect the metal particles in the screen 22 when the first stirring mechanism 23 is in the second position.

[0098] According to some embodiments of this application, please refer to Figure 1The screening device 100 also includes a connecting pipe 50, which connects the screening container 21 and the slurry mixing unit 30. The connecting pipe 50 is used to transport the slurry of the slurry mixing unit 30 to the screening container 21. The connecting pipe 50 is extended along the direction of gravity; on the same projection plane perpendicular to the direction of gravity, the orthographic projection of the screening container 21 and the orthographic projection of the slurry mixing unit 30 at least partially overlap.

[0099] The direction of gravity can be understood as the vertical downward direction. On the same projection plane perpendicular to the direction of gravity, the orthographic projection of the screening unit 20 and the orthographic projection of the slurry unit at least partially overlap” can be understood as, in the direction of gravity, the orthographic projections of the screening unit 20 and the slurry mixing unit 30 overlap with each other, or it can be understood as, in the horizontal direction (i.e., the direction perpendicular to the direction of gravity), the screening unit 20 and the slurry mixing unit 30 are at least partially overlapped.

[0100] A valve 51 is provided on the connecting pipe 50 to cut off or connect the slurry mixing unit 30 and the screening unit 20. The provision of the valve 51 can flexibly control the amount of slurry entering the screening container 21, reducing the risk of inaccurate quantitative detection results due to excessive slurry overflowing the screening container 21.

[0101] The connection pipe 50 allows the slurry from the slurry mixing unit 30 to flow into the screening container 21. The connection pipe 50 extends in the direction of gravity, allowing the slurry to flow from the slurry mixing unit 30 into the screening container 21 under the action of gravity, thereby reducing the risk of material jamming and incomplete rinsing. Furthermore, on the same projection plane perpendicular to the direction of gravity, the orthographic projection of the screening container 21 at least partially overlaps with the orthographic projection of the slurry mixing unit 30, resulting in a small screening device with a small footprint and a more compact structure.

[0102] According to some embodiments of this application, please combine Figure 1 and Figure 7 , Figure 1 This is a schematic structural diagram of the screening equipment according to some embodiments of the present application; Figure 7 This is a schematic diagram of the structure of the second stirring mechanism in the screening equipment of some embodiments of the present application. The slurry mixing unit 30 includes a stirring container 31 and a second stirring mechanism 32. The stirring container 31 is disposed on the frame 10 and has a feeding port 311 for supplying water and powder into the stirring container 31. The second stirring mechanism 32 is used to stir and mix the water and powder in the stirring container 31 into a slurry.

[0103] The stirring container 31 is a container for holding water and powder. The stirring container 31 is made of a non-metallic material. In some embodiments, the stirring container 31 is made of glass. The second stirring mechanism 32 includes a support frame 323, a second stirring motor 321, and a second stirring member 322. The second stirring motor 321 is mounted on the frame 10 via the support frame 323, and the driving end of the second stirring motor 321 is connected to the second stirring member 322. The second stirring member 322 includes a second stirring shaft 3221 and a cross-shaped stirring blade 3222 located on the second stirring shaft 3221.

[0104] By setting the feeding port 311 of the stirring container 31, water and powder can be quickly added into the stirring container 31, and can be mixed into a uniform slurry under the action of the second stirring mechanism 32, so that it can be effectively screened by the screening unit 20 in the subsequent screening process.

[0105] In some embodiments, please refer to Figure 1 The frame 10 is formed with a first opening 13, and a portion of the mixing container 31 is inserted into the first opening 13; a first limiting member 60 is provided on the frame 10 on the outer peripheral side of the mixing container 31. The first limiting member 60 includes three guardrails 61 and a limiting rod 62. The three guardrails 61 are respectively a left guardrail, a right guardrail and a rear guardrail. The three guardrails 61 are respectively located on the left and right sides and the rear side of the mixing container 31. The three guardrails 61 are connected to each other and are arranged around the mixing container 31. The limiting rod 62 is provided on the front side of the mixing container 31. One end of the limiting rod 62 is hinged to the left guardrail, and the other end of the limiting rod 62 is detachably connected to the right guardrail. When the limiting rod 62 is opened, the mixing container 31 can be easily removed. When the limiting rod 62 is closed, the mixing container 31 is confined within the first limiting member 60.

[0106] By forming the first opening 13 on the frame 10, the mixing container 31 can be inserted and installed on the frame 10 through the first opening 13, thereby achieving the installation of the mixing container 31. The provision of the first stopper 60 can ensure that the mixing container 31 is stably located in the first opening 13, so that the water and powder are stably stirred and mixed by the first stirring mechanism 23.

[0107] In some embodiments, the screening device 100 may further include a flushing unit 70, which is disposed on the frame 10 and close to the screening unit 20. The flushing unit 70 is used to provide flushing water to the screening container 21. The flushing unit 70 includes a flushing pipeline, a flexible pipe 71, and a flushing nozzle 72. The flushing pipeline is connected to the water supply system. The flexible pipe 71 is disposed between the flushing pipeline and the flushing nozzle 72. The flexible pipe 71 is used to adjust the position of the flushing nozzle 72 on the frame 10. The flushing nozzle 72 can be detachably mounted on the frame 10 by a buckle.

[0108] An operating button 12 may be provided on the frame 10 , and the operating button 12 may be used to control the opening and closing of the first stirring mechanism 23 and / or the second stirring mechanism 32 .

[0109] An embodiment of the present application further provides a battery manufacturing device, which includes the screening device 100 of any of the aforementioned embodiments.

[0110] In some embodiments, please refer to Figures 1 to 7 The screening device 100 includes a frame 10, a slurry mixing unit 30 and a screening unit 20. The slurry mixing unit 30 is arranged on the frame 10. The slurry mixing unit 30 is used to mix water and powder into slurry; the screening unit 20 is connected to the slurry mixing unit 30, and is used to stir the slurry again and screen out foreign particles in the slurry; the screening unit 20 includes a screening container 21, a screen 22 and a first stirring mechanism 23. The screening container 21 is arranged on the frame 10 and connected to the slurry mixing unit 30, and is used to receive the slurry discharged by the slurry mixing unit 30; the screen 22 is arranged in the screening container 21; the first stirring mechanism 23 is used to stir the slurry in the screening container 21 to screen out foreign particles in the slurry on the screen 22; the screening unit 20 also includes a first The driving unit 24, the first driving unit 24 is used to drive the screening container 21 and the screen 22 to rotate together along the axial direction of the screening container 21; the first driving unit 24 includes a first driving member 241, a transmission member 242 and a connecting member 243. The screening container 21 is installed on the transmission member 242 through the connecting member 243. The first driving member 241 is installed on the frame 10, and is used to drive the transmission member 242 to drive the screening container 21 to rotate along its axial direction; the screening unit 20 also includes a waste liquid discharge unit 40, which is installed on the frame 10; along the direction of gravity, the waste liquid discharge unit 40 is located on the lower side of the screening container 21; the transmission member 242 is a slewing bearing 2421, and the slewing bearing 2421 has an avoidance hole for avoiding the waste liquid discharge unit 40.

[0111] By setting the first stirring mechanism 23 in the screening unit 20, and the screening container 21 is rotatably mounted on the frame 10, while the first stirring mechanism 23 stirs the slurry in the screening container 21 again, the screening container 21 is rotated under the driving action of the first driving unit 24, thereby driving the screen 22 to rotate synchronously. Under the action of the rotation of the screen 22, the slurry on the screen 22 can be further driven to move relative to the screen 22, thereby improving the activity of the slurry on the screen 22. The slurry on the screen 22 is not prone to disturbance blind spots, which improves the sedimentation of the slurry and is not easily blocked on the screen 22. The efficiency of the powder passing through the screen 22 is improved, and the slurry can be more easily screened out relative to the screen 22, so that the screen 22 can more effectively and quickly screen out foreign particles in the slurry, thereby improving the accuracy of the quantitative detection results of metal particles, thereby effectively improving the manufacturing efficiency of the battery. By adopting the transmission member 242 as the slewing bearing 2421, the slewing bearing 2421 can provide support for the screening container 21, which not only makes the screening container 21 more stable during rotation, but also the avoidance hole in the middle of the slewing bearing 2421 can be used for the waste liquid discharge unit 40 to be set, which is beneficial to the spatial layout of the waste liquid discharge unit 40.

[0112] In some embodiments, the first stirring mechanism 23 includes a first stirring drive member 231 and a first stirring member 232. The first stirring drive member 231 is mounted on the frame 10 and is used to drive the first stirring member 232 to rotate to stir the slurry. The rotation direction of the screening container 21 is set in the same direction as the rotation direction of the first stirring member 232, and the rotation axis of the screening container 21 is set parallel to the rotation axis of the first stirring member 232. On the same projection plane perpendicular to the direction of gravity, the orthographic projection of the first stirring member 232 is located within the orthographic projection of the screening container 21, the size of the orthographic projection of the first stirring member 232 in the radial direction of the screening container 21 is not less than the radius of the screening container 21, and there is a gap between the first stirring member 232 and the inner wall of the screening container 21.

[0113] By arranging the rotation direction of the screening container 21 in the same direction as the rotation direction of the first stirring mechanism 23, it is possible to reduce the splashing of the slurry when the first stirring mechanism 23 stirs the slurry in the screening container 21, while maintaining the good screening efficiency of the screening unit 20. The first stirring mechanism 23 is eccentrically arranged in the screening container 21. By utilizing the rotatable function of the screening container 21, the orthographic projection area of ​​the first stirring mechanism 23 on the screen 22 can be reduced, and the screen 22 does not need to be completely covered. This makes the first stirring mechanism 23 smaller in size and can still meet the screening requirements of the screening unit 20, and the screening unit 20 has a simpler structure. The positive projection of the first stirring member 232 on the radial direction of the screening container 21 is not less than the radius of the screening container 21, and there is a gap between the first stirring member 232 and the inner wall of the screening container 21. In this way, when the screen 22 rotates, the first stirring member 232 can cover all areas of the surface where the screen 22 is located, that is, under the premise of the rotation of the screen 22, the first stirring member 232 can stir each area on the screen 22, effectively improving the phenomenon of powder sedimentation, thereby improving the efficiency of the powder passing through the screen 22, reducing the risk of inaccurate quantitative detection results due to the screening unit 20 being blocked by agglomerated powder or the existence of a stirring blind spot causing the screened metal particles to be mixed with powder, thereby effectively improving the manufacturing efficiency of the battery.

[0114] In some embodiments, the first stirring member 232 includes a first stirring shaft 2321 and a plurality of stirring grips 2322. The first stirring shaft 2321 is connected to the first stirring drive member 231, and the plurality of stirring grips 2322 are spaced apart along the circumference of the first stirring shaft 2321. One end of the stirring grip 2322 is connected to the first stirring shaft 2321, and the other end is tilted downward toward a side away from the first stirring shaft 2321. The stirring grip 2322 is made of a flexible material.

[0115] Under the rotation of the first stirring shaft 2321 , the multiple stirring grippers 2322 cooperate with each other to effectively destroy the powder deposited on the surface of the screen 22 , thereby improving the efficiency of the powder passing through the screen 22 . The first stirring member 232 for contacting the slurry and the screen 22 is set to be made of a flexible material. When the first stirring mechanism 23 stirs the powder on the screen 22, the lower end of the first stirring member 232 can contact the screen 22 and have a certain pre-pressure. The stirring grip 2322 made of flexible material can deform itself to reduce the impact force on the screen 22. During the rotation of the stirring grip 2322, the stirring grip 2322 can drive the screen 22 and the area in contact with the stirring grip 2322 to have a slight downward extrusion deformation in the direction of gravity. Then, the screen 22 rotates until the stirring grip 2322 separates from the area just contacted, and then the screen 22 is reset, so that the local area of ​​the screen 22 has a slight vibration deformation, so that the powder deposited on the screen 22 is easier to be shaken, which can effectively improve the screening efficiency of the screening unit 20.

[0116] In some embodiments, the screening container 21 has a feed port 211 in a first direction Z; the first stirring mechanism 23 is movably disposed on the frame 10 along the first direction to switch between a first position in which the first stirring mechanism 23 extends into the screening container 21 and a second position in which the first stirring mechanism 23 is detached from the screening container 21. The screening device further includes a connecting pipe 50, which connects the screening container 21 and the slurry mixing unit 30. The connecting pipe 50 is used to transport the slurry from the slurry mixing unit 30 to the screening container 21. The connecting pipe 50 is arranged along the direction of gravity; on the same projection plane perpendicular to the direction of gravity, the orthographic projection of the screening container 21 and the orthographic projection of the slurry mixing unit 30 at least partially overlap. The slurry mixing unit 30 includes a stirring container 31 and a second stirring mechanism 32. The stirring container 31 is disposed on the frame 10. The stirring container 31 has a feeding port 311 for supplying water and powder into the stirring container 31. The second stirring mechanism 32 is used to stir and mix the water and powder in the stirring container 31 into a slurry.

[0117] By movably arranging the first stirring mechanism 23 on the frame 10, the first stirring mechanism 23 can be switched between the first position and the second position, so that the first stirring mechanism 23 can act on the screen 22 in the first position to stir the slurry, assist water and powder to flow through the screen 22, and improve the efficiency of metal particle screening, or the first stirring mechanism 23 can remove and collect the metal particles in the screen 22 when in the second position. The connecting pipe 50 is arranged to extend along the direction of gravity, so that the slurry can flow from the slurry mixing unit 30 into the screening container 21 under the action of gravity, and the risk of material jamming and unclean flushing can be reduced. In addition, on the same projection plane perpendicular to the direction of gravity, the orthographic projection of the screening container 21 and the orthographic projection of the slurry mixing unit 30 at least partially overlap, so that the screening device 100 has a small volume, a small footprint, and a more compact structure.

[0118] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A screening device, characterized in that: include: frame; A slurry mixing unit is provided on the frame, and is used to stir and mix water and powder into slurry; a screening unit connected to the slurry mixing unit, for re-stirring the slurry and screening out foreign particles in the slurry; the screening unit comprises a screening container, a screen, and a first stirring mechanism; the screening container is disposed on the frame and connected to the slurry mixing unit, for receiving the slurry discharged from the slurry mixing unit; the screen is disposed in and connected to the screening container; the first stirring mechanism is used to stir the slurry in the screening container to screen out foreign particles in the slurry on the screen; Wherein, the screening container is rotatably mounted on the frame.

2. The screening device according to claim 1, characterized in that The screening unit also includes a first driving unit, which includes a first driving member and a transmission member. The first driving member is installed on the frame, the transmission member connects the first driving member and the screening container, and the first driving member is used to drive the screening container to rotate relative to the frame.

3. The screening device according to claim 2, characterized in that: The screening equipment also includes: A waste liquid discharge unit is installed on the frame; along the direction of gravity, the waste liquid discharge unit is located on the lower side of the screening container; The transmission member includes a slewing bearing having an escape hole for escaping the waste liquid discharge unit.

4. The screening device according to claim 1, characterized in that The rotation direction of the screening container is arranged in the same direction as the rotation direction of the first stirring mechanism.

5. The screening device according to claim 1, characterized in that: The first stirring mechanism includes a first stirring driving member and a first stirring member. The first stirring driving member is installed on the frame and is used to drive the first stirring member to rotate to stir the slurry.

6. The screening device according to claim 5, characterized in that At least a portion of the first stirring member is located in the screening container, and a rotation axis of the first stirring member is arranged parallel to a rotation axis of the screening container.

7. The screening device according to claim 6, characterized in that On the same projection plane perpendicular to the direction of gravity, the orthographic projection of the first stirring member is located within the orthographic projection of the screening container, the radial size of the orthographic projection of the first stirring member in the screening container is not less than the radius of the screening container, and there is a gap between the first stirring member and the inner wall of the screening container.

8. The screening device according to claim 5, characterized in that The first stirring member includes a first stirring shaft and a plurality of stirring grips. The first stirring shaft is connected to the first stirring drive member, and the plurality of stirring grips are distributed at intervals along the circumference of the first stirring shaft. One end of the stirring grip is connected to the first stirring shaft, and the other end is inclined downward toward the side away from the first stirring shaft.

9. The screening device according to claim 8, characterized in that The stirring handle is made of flexible material.

10. The screening device according to claim 1, characterized in that The first stirring mechanism is movably arranged on the frame along a first direction to switch between a first position in which the first stirring mechanism extends into the screening container and a second position in which the first stirring mechanism is detached from the screening container, and the first direction is parallel to the axis of the screening container.

11. The screening device according to claim 1, characterized in that The screening equipment also includes a connecting pipe, which connects the screening container and the slurry mixing unit. The connecting pipe is used to transport the slurry from the slurry mixing unit to the screening container, and the connecting pipe extends along the direction of gravity; on the same projection plane perpendicular to the direction of gravity, the orthographic projection of the screening container and the orthographic projection of the slurry mixing unit at least partially overlap.

12. The screening device according to claim 1, characterized in that The slurry mixing unit includes a stirring container and a second stirring mechanism. The stirring container is arranged on the frame. The stirring container has a feeding port for feeding the water and the powder into the stirring container. The second stirring mechanism is used to stir and mix the water and the powder in the stirring container into a slurry.

13. A battery manufacturing device, characterized in that: Comprising the screening device according to any one of claims 1-12.

Images