Polishing apparatus and battery manufacturing apparatus

Abstract

This application discloses a grinding apparatus and battery manufacturing equipment. The grinding apparatus includes a mixing tank, a stirring rod, and a filter assembly. The mixing tank contains materials and grinding media balls, and the stirring rod is disposed inside the mixing tank. The mixing tank can rotate and drive the materials and grinding media balls to grind. The filter assembly includes a filter tank and a rotating shaft. The filter tank is disposed inside the mixing tank. The filter tank has a receiving cavity, and the filter tank has multiple mesh openings communicating with the receiving cavity. The mesh openings are used to filter out the ground powder. The rotating shaft is connected to the filter tank and can drive the filter tank to rotate axially. The above-described grinding apparatus and battery manufacturing equipment can improve the efficiency of active material grinding, thereby improving battery production efficiency.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to a grinding apparatus and battery manufacturing equipment. Background Technology

[0002] Electrode sheets are one of the most important components in a battery. They contain an active material layer comprising various raw materials. These materials require meticulous grinding to ensure the performance of the battery cells. Because the grinding reaches the nanometer level, the mesh of the filter device is easily clogged. A clogged filter device needs to be disassembled and cleaned before it can continue filtering. These issues reduce grinding efficiency, leading to a decrease in the production efficiency of battery cells. Utility Model Content

[0003] In view of the above problems, this application provides a grinding apparatus and a battery manufacturing equipment that can improve battery production efficiency.

[0004] In a first aspect, this application provides a grinding apparatus, including a mixing tank, a stirring rod, and a filter assembly. The mixing tank contains materials and grinding media balls, and the stirring rod is disposed within the mixing tank. The mixing tank is capable of rotation and drives the materials and grinding media balls to grind. The filter assembly includes a filter tank and a rotating shaft, with the filter tank disposed within the mixing tank. The filter tank has a receiving cavity, and the filter tank is provided with multiple mesh openings communicating with the receiving cavity. The mesh openings are used to filter out the ground powder, and the rotating shaft is connected to the filter tank and can drive the filter tank to rotate axially.

[0005] In the technical solution of this application embodiment, a mixing tank is set up to accommodate the material to be ground and the grinding media balls, reducing the risk of external impurities entering the grinding tank and contaminating the raw materials. The rotation of the stirring rod drives the grinding media balls and the material to move, and during the movement, they rub and squeeze against each other. The high-hardness grinding media balls can crush and grind the material. The filter assembly is provided with a mesh with a preset aperture, allowing the ground material to pass through and collecting the material into the receiving cavity. In particular, by setting a rotating shaft in the filter assembly to drive the filter tank to rotate, the centrifugal force generated by the filter tank during rotation throws out the material clogging the mesh to clear the mesh. After rotation, the filter tank can continue to collect material without disassembling and cleaning the filter tank, extending the filtration and cleaning cycle, reducing the time wasted on cleaning, and improving production efficiency.

[0006] In some embodiments, the mixing tank is provided with a discharge port, and the filter assembly further includes a discharge pipe, one end of which is connected to the receiving cavity, and the other end of which extends out from the discharge port. In the above process, the discharge port facilitates material discharge from the filter tank, and the discharge pipe allows the material in the filter tank to be discharged directly without removing the filter tank, enabling continuous filtration and improving production efficiency.

[0007] In some embodiments, the filter assembly further includes a first seal disposed between the rotating shaft and the mixing tank, the first seal being located inside the discharge port. In the above structure, the first seal improves the sealing performance at the discharge port, reducing the risk of material leakage from the mixing tank.

[0008] In some embodiments, the discharge pipe is disposed inside the rotating shaft and is coaxially arranged with the shaft. In the above structure, the discharge pipe is disposed inside the rotating shaft, which allows the discharge pipe to be installed when the rotating shaft is installed, resulting in high integration and reducing the number of openings on the mixing tank, thereby improving the sealing performance of the mixing tank.

[0009] In some embodiments, the filter assembly further includes a movable housing, which is detachably mounted on the outside of the mixing tank away from the stirring rod, with one end of the rotating shaft away from the stirring rod connected to the movable housing. In the above structure, one end of the rotating shaft is connected to the filter tank and the other end is connected to the movable housing. By removing the movable housing, the rotating shaft and the filter tank can be removed from the mixing tank, improving the ease of disassembly of the device.

[0010] In some embodiments, the filter assembly further includes a first bearing disposed within a movable housing and sleeved around a rotating shaft to rotatably connect the movable housing and the rotating shaft. In the above structure, the first bearing and the rotatable connection between the movable housing and the rotating shaft ensure stable connection between the movable housing and the mixing tank during the rotation of the filter tank by the rotating shaft, thus improving the smoothness of the rotation process.

[0011] In some embodiments, the filter assembly further includes a second seal disposed between the rotating shaft and the movable housing. The second seal improves the sealing performance between the rotating shaft and the movable housing.

[0012] In some embodiments, the filter assembly further includes a first drive motor connected to and driving a rotating shaft to rotate. The first drive motor is mounted on a movable housing. In the above structure, the first drive motor can drive the filter tank to rotate rapidly, quickly throwing out material from the mesh when the filter tank becomes clogged, allowing for continuous and smooth material flow and reducing the frequency of filter tank replacement and cleaning. Furthermore, the first drive motor can also drive the filter tank to rotate at a uniform speed, improving the grinding efficiency of the grinding media balls during the grinding process.

[0013] In some embodiments, the filter assembly further includes an adapter and a second bearing. The adapter is connected to the end of the discharge pipe away from the filter tank, and a discharge channel is provided inside the adapter. One end of the discharge channel communicates with the discharge pipe, and the other end of the discharge channel is used to communicate with a storage device. The second bearing is sleeved on the adapter and is used to connect the storage device, so as to rotatably connect the discharge pipe and the storage device. In the above structure, by setting the adapter and the second bearing to rotatably connect the discharge pipe and the storage device, material can still be discharged while the filter tank drives the discharge tank to rotate, realizing continuous filtration and discharge, and improving the efficiency of filtering and collecting materials.

[0014] In some embodiments, the stirring rod is recessed into the end face of the filter tank to form a receiving groove, at least a portion of the filter tank is disposed within the receiving groove, and the stirring rod has a plurality of communicating holes communicating with the receiving groove. In the above structure, by placing the filter tank within the receiving groove, a larger stirring area and range are achieved between the filter tank and the stirring tank. Within the same stirring time, materials can be mixed, homogenized, or dissolved more effectively, improving stirring efficiency.

[0015] In some embodiments, the grinding apparatus further includes a second drive motor, a pressure sensor, and a control component. The second drive motor is connected to the stirring rod and drives the stirring rod to rotate inside the mixing tank. The pressure sensor is located in the mixing tank and is used to sense the air pressure inside the mixing tank. The control component is electrically connected to the second drive motor and the pressure sensor. In the above structure, by setting the control component to control the second drive motor to drive the stirring rod to rotate, the grinding efficiency is improved. The pressure sensor can detect the air pressure inside the mixing tank. When the air pressure exceeds a preset value, it can reflect the clogging status of the filter mesh inside the mixing tank, allowing for timely handling of the clogging and reducing the risk caused by excessive pressure inside the mixing tank.

[0016] In some embodiments, the control component is electrically connected to the first drive motor. In the above structure, by connecting the first drive motor to the control component, when the mesh of the filter tank is clogged, the control component can be used to control the first drive motor to drive the filter tank to rotate rapidly, clearing the material clogging the mesh and allowing the material in the mesh to be filtered smoothly, thereby improving the filtration efficiency.

[0017] In some embodiments, the grinding apparatus further includes a moving component, which includes a fixed block and a connecting rod. The fixed block is disposed in the mixing tank and has a through hole. One end of the connecting rod is connected to the movable housing, and the other end of the connecting rod passes through the through hole and is slidably connected to the fixed block. The connecting rod extends axially along the shaft and can move relative to the fixed block, thereby moving the filter assembly out of the mixing tank. In the above structure, the connecting rod is connected to the mixing tank by the fixed block. The other end of the connecting rod is connected to the movable housing. By pulling the connecting rod, the movable housing is separated from the mixing tank, thereby disassembling the filter assembly and improving the convenience of disassembly and installation of the filter assembly.

[0018] Secondly, this application provides a battery manufacturing apparatus, which includes the grinding device in the above embodiments.

[0019] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0020] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0021] Figure 1 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0022] Figure 2 This is a schematic diagram of the structure of a grinding apparatus according to some embodiments of this application;

[0023] Figure 3 This is a schematic diagram of the structure of a grinding apparatus according to other embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the structure of a grinding apparatus according to some embodiments of this application;

[0025] Figure 5 This is a top view of the grinding apparatus according to some embodiments of this application.

[0026] Detailed Explanation of Reference Numerals

[0027] 1. Battery cell; 10. Electrode assembly; 20. Housing; 30. End cap; 40. Outer shell; 2. Grinding device; 201. Mixing tank; 202. Stirring rod; 203. Filter tank; 204. Rotating shaft; 205. Mesh; 206. Discharge port; 207. Discharge pipe; 208. Moving protective shell; 209. First bearing; 210. First drive motor; 211. Adapter; 212. Second bearing; 213. Discharge channel; 214. Second drive motor; 215. Pressure sensor; 216. Control component; 217. Connecting hole; 218. Fixing block; 219. Connecting rod. Detailed Implementation

[0028] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0030] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0033] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0034] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0035] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0036] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0037] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0038] Battery devices are widely used in various electronic devices, such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy airplanes, electric toy ships, power tools, and energy storage systems. The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via busbars.

[0039] For example, a single battery cell may be the smallest unit that makes up a battery device.

[0040] Figure 1 This is an exploded structural diagram of a battery cell provided in some embodiments of this application.

[0041] like Figure 1 As shown, in some embodiments, the battery cell 1 includes a housing 40 and an electrode assembly 10 housed within the housing 40. The housing 40 may include an end cap 30 and a casing 20.

[0042] The electrode assembly 10 includes a positive electrode and a negative electrode. During the charging and discharging process of the battery cell 1, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrodes. Optionally, the electrode assembly 10 also includes a separator disposed between the positive and negative electrodes, which can reduce the risk of short circuit between the positive and negative electrodes while allowing active ions to pass through. The battery cell 1 also includes an electrolyte housed within the casing 40. The electrolyte acts as a conductor of ions between the positive and negative electrodes.

[0043] For example, the positive electrode includes a positive current collector and an active material layer coated on the surface of the positive current collector, and the negative electrode includes a negative current collector and a negative active material layer coated on the surface of the negative current collector.

[0044] The raw materials in the active material layer of the electrode sheet need to be finely ground to meet the requirements for use. Typically, nanotechnology is used to grind large particles of raw material into smaller particles, which are then filtered through a screen. However, during the grinding process, the increased viscosity of the material after nano-sizing easily clogs the separator's screen, requiring the mill to be shut down for disassembly and cleaning, severely impacting production efficiency.

[0045] To address the aforementioned problems, embodiments of this application provide a grinding apparatus. This apparatus uses a mixing tank to accommodate the material to be ground and grinding media balls, reducing the risk of external impurities contaminating the raw materials. A rotating stirring rod moves the grinding media balls and material, causing them to rub and compress against each other. The high-hardness grinding media balls can then crush and grind the material. A filter assembly has mesh openings of a preset diameter, allowing the ground material to pass through and collect it in a receiving cavity. Specifically, a rotating shaft within the filter assembly drives the filter tank to rotate. During rotation, the centrifugal force generated by the filter tank dislodges material clogging the mesh, clearing the openings. After rotation, the filter tank can continue collecting material without requiring disassembly and cleaning. This extends the filtration and cleaning cycle, reduces wasted cleaning time, and improves production efficiency.

[0046] Please refer to the reference. Figures 2 to 4 , Figure 2 This is a schematic diagram of the structure of a grinding apparatus according to some embodiments of this application. Figure 3 This is a schematic diagram of the structure of a grinding apparatus according to other embodiments of this application. Figure 4 This is a schematic diagram of the structure of a grinding apparatus according to some embodiments of this application.

[0047] As shown in the figure, this application embodiment provides a grinding device 2, including a mixing tank 201, a stirring rod 202, and a filter assembly. The mixing tank 201 is used to contain materials and grinding media balls. The stirring rod 202 is disposed inside the mixing tank 201, and the mixing tank 201 can rotate to drive the materials and grinding media balls to grind. The filter assembly includes a filter tank 203 and a rotating shaft 204. The filter tank 203 is disposed inside the mixing tank 201. The filter tank 203 has a receiving cavity, and the filter tank 203 is provided with a plurality of mesh holes 205 communicating with the receiving cavity. The mesh holes 205 are used to filter out the ground powder. The rotating shaft 204 is connected to the filter tank 203 and can drive the filter tank 203 to rotate around the axial direction.

[0048] The mixing tank 201 can be a cylindrical structure with an internal cavity. To improve the efficiency of grinding and mixing, the mixing tank 201 can be tilted. For example, the mixing tank 201 can be placed with its axial direction parallel to the horizontal direction. A support frame can be provided at the bottom of the mixing tank 201 to improve the stability of the grinding process. The mixing tank 201 can be manufactured using materials with certain structural strength, wear resistance, and corrosion resistance. For example, the main body of the mixing tank 201 can be made of materials such as steel or aluminum alloy.

[0049] Optionally, a feed inlet is provided on the side wall of the mixing tank 201 for introducing the material to be mixed into the mixing tank 201. The feed inlet can also be connected to a conveying pump to pump the material into the mixing tank 201, thereby improving the efficiency of raw material conveying.

[0050] Grinding media balls are used to grind materials into a slurry of a predetermined particle size through friction and compression. Grinding media balls need to possess certain strength, corrosion resistance, and high density. For example, grinding media balls can be any one of zirconia balls, alumina balls, silicon carbide balls, and silicon nitride balls.

[0051] One end of the stirring rod 202 extends from the end side of the mixing tank 201 and is rotatably connected to the mixing tank 201. The other end of the stirring rod 202 is disposed inside the mixing tank 201 for stirring. The end of the stirring rod 202 extending out of the mixing tank 201 can be connected to a drive motor. The surface of the other end of the stirring rod 202 is provided with multiple protrusions, which can drive the grinding media balls and materials to roll, thereby improving the stirring efficiency.

[0052] In the filtration assembly, the filter tank 203 can be an end-sealed cylindrical structure to accommodate the ground material. It is understood that the filter tank 203, apart from the mesh 205, has no other through holes or openings communicating with the outside, to achieve relative sealing of the internal cavity and reduce the risk of impurities entering the sealed tank. The filter tank 203 has mesh 205 on its side wall to allow the ground material to pass through. The filter tank 203 is connected to a rotating shaft 204, which extends outside the mixing tank 201; rotating the shaft 204 drives the filter tank 203 to rotate.

[0053] In the technical solution of this application embodiment, a mixing tank 201 is set up to accommodate the material to be ground and the grinding media balls, reducing the risk of external impurities entering the grinding tank and contaminating the raw materials. The rotating stirring rod 202 drives the grinding media balls and material to move, and during this movement, they rub and squeeze against each other. The high-hardness grinding media balls can crush and grind the material. A mesh 205 with a preset aperture is provided on the filter assembly, allowing the ground material to pass through and collect it into the receiving cavity. Specifically, a rotating shaft 204 is set in the filter assembly to drive the filter tank 203 to rotate. During rotation, the centrifugal force generated by the filter tank 203 throws out the material clogging the mesh 205, clearing the mesh 205. After rotation, the filter tank 203 can continue to collect material without disassembling and cleaning it, extending the filtration and cleaning cycle, reducing wasted cleaning time, and improving production efficiency.

[0054] It is understood that the grinding apparatus provided in this application embodiment can be used not only for grinding active material powder of battery cells, but also for other processes requiring fine grinding. For example, the grinding equipment in this application embodiment can be used in multiple fields such as metal processing, abrasive processing, precision machining, and modern mechanical manufacturing and precision machining, and can be selected as needed.

[0055] In some embodiments of this application, the mixing tank 201 is provided with a discharge port 206, and the filter assembly also includes a discharge pipe 207, one end of which is connected to the receiving cavity, and the other end of which extends out from the discharge port 206.

[0056] The inner diameter and length of the discharge pipe 207 should be rationally designed according to the characteristics of the material and the requirements of the grinding device 2 to ensure that the material can be discharged smoothly. The material of the discharge pipe 207 should have good wear resistance and corrosion resistance to ensure that its service life meets the standard.

[0057] The discharge pipe 207 serves as a channel connecting the filter tank 203 and the discharge port 206, allowing materials to flow smoothly out of the filter tank 203 and reducing the risk of material accumulation and blockage within the filter tank 203. Through the discharge pipe 207 and discharge port 206, operators can easily control the discharge process without complex operations or adjustments. This reduces operational difficulty and improves operational convenience and safety. Simultaneously, the elimination of frequent disassembly and cleaning of the filter tank 203 reduces production downtime, enabling the grinding unit 2 to operate continuously and efficiently. The simplification and automation of the discharge process also improves production efficiency and reduces production costs.

[0058] Optionally, the discharge pipe 207 is equipped with sensors, control valves, and an automatic controller to achieve precise control and automated operation of the discharge. The automatic controller can automatically adjust the discharge rate and discharge time according to the operating status of the grinding device 2 and the quality requirements of the material.

[0059] In the above structure, the discharge port 206 facilitates the discharge of material from the filter tank 203, and the discharge pipe 207 allows the material in the filter tank 203 to be discharged directly without removing the filter tank 203, enabling the filter tank 203 to perform continuous filtration and improving production efficiency.

[0060] In some embodiments of this application, the filter assembly further includes a first seal disposed between the rotating shaft 204 and the mixing tank 201, the first seal being disposed within the discharge port 206. In the above structure, the sealing performance at the discharge port 206 is improved by providing the first seal, reducing the risk of material leakage within the mixing tank 201.

[0061] In some embodiments of this application, the discharge pipe 207 is disposed inside the rotating shaft 204 and is coaxially arranged with the rotating shaft 204.

[0062] In the above structure, the rotating shaft 204 passes through the discharge port 206 and is connected to the first drive motor 210. For example, the discharge pipe 207 is disposed inside the rotating shaft 204. A through hole can be provided inside the rotating shaft 204, and the discharge pipe 207 can be installed into the through hole. Alternatively, a channel for material flow can be formed inside the rotating shaft 204 to achieve the above structure.

[0063] In the above structure, the discharge pipe 207 is integrated within the rotating shaft 204, allowing for simultaneous installation of the rotating shaft 204 and the discharge pipe 207. This high degree of integration reduces the number of openings on the mixing tank 201, improving its sealing performance. Furthermore, reducing the number of openings on the mixing tank 201 reduces the potential risk of leakage, further enhancing its sealing performance. This improved sealing performance helps prevent material leakage and the entry of external impurities, ensuring the purity and safety of the grinding process. The coaxial arrangement allows for full utilization of space for the discharge pipe 207 and the rotating shaft 204, avoiding additional space occupation. This design makes the overall structure of the grinding device 2 more compact, saving production space and reducing production costs.

[0064] like Figure 3 As shown, in some embodiments of this application, the filter assembly further includes a movable housing 208, which is detachably mounted on the outside of the mixing tank 201 away from the stirring rod 202, and the end of the rotating shaft 204 away from the stirring rod 202 is connected to the movable housing 208.

[0065] For example, the movable protective shell 208 is provided with multiple mounting holes, and the outer wall of the mixing tank 201 is provided with corresponding mounting grooves. Fasteners pass through the mounting holes and mounting grooves to detach and connect the movable protective shell 208 to the shell of the mixing tank 201.

[0066] By disassembling the movable protective shell 208, the rotating shaft 204 and the filter tank 203 connected to it can be quickly removed from the mixing tank 201, avoiding the complex disassembly process in the traditional grinding device 2 and reducing the labor intensity and time cost for operators. In the above structure, one end of the rotating shaft 204 is connected to the filter tank 203 and the other end is connected to the movable protective shell 208. By disassembling the movable protective shell 208, the rotating shaft 204 and the filter tank 203 can be removed from the mixing tank 201, improving the convenience of device disassembly.

[0067] In some embodiments of this application, the filter assembly further includes a first bearing 209, which is disposed inside the movable housing 208 and sleeved on the outside of the rotating shaft 204 to rotatably connect the movable housing 208 and the rotating shaft 204.

[0068] In the above structure, a first bearing 209 is provided, and the movable protective shell 208 is rotatably connected to the rotating shaft 204. During the rotation of the filter tank 203 driven by the rotating shaft 204, the shaft rotates relative to the movable protective shell 208. The movable protective shell 208 remains stationary and connected to the mixing tank 201, improving the smoothness of the rotation process. The first bearing 209 ensures that the rotating shaft 204 can rotate smoothly relative to the movable protective shell 208 during rotation, reducing friction and resistance and improving rotation efficiency. This structure allows the filter tank 203 to rotate stably and continuously during the grinding process, thereby effectively performing material filtration and centrifugal discharge operations.

[0069] In some embodiments of this application, the filter assembly further includes a second seal disposed between the rotating shaft 204 and the movable housing 208. The second seal effectively fills the gap between the rotating shaft 204 and the movable housing 208, reducing material leakage and the entry of external impurities during the grinding process. The second seal improves the sealing performance between the rotating shaft 204 and the movable housing 208.

[0070] In some embodiments of this application, the filter assembly further includes a first drive motor 210, which is connected to the rotating shaft 204 and drives the rotating shaft 204 to rotate. The first drive motor 210 is mounted on the movable housing 208.

[0071] The rotational speed of the filter tank 203 can be adjusted by controlling the rotational speed of the first drive motor 210. When the filter tank 203 is not clogged, the first drive motor 210 drives the filter tank 203 to rotate at a low and uniform speed, grinding the grinding media balls and materials. Optionally, the filter tank 203 can rotate in the opposite direction to the stirring rod 202 to improve grinding efficiency. When the mesh 205 of the filter tank 203 becomes clogged, the first drive motor 210 drives the filter tank 203 to rotate at a high speed to generate a large centrifugal force, throwing out the clogged material from the mesh 205, thereby clearing the blockage and restoring the filter to normal operation.

[0072] In the above structure, the first drive motor 210 can drive the filter tank 203 to rotate rapidly, quickly throwing out the material in the mesh 205 when the filter tank 203 is blocked, allowing the material to flow smoothly and continuously, reducing the frequency of replacing and cleaning the filter tank 203. Furthermore, the first drive motor 210 can also drive the filter tank 203 to rotate at a uniform speed; the even distribution and full movement of the grinding media balls help to refine the material particles, improving grinding quality and product purity.

[0073] In some embodiments of this application, the filter assembly further includes an adapter 211 and a second bearing 212. The adapter 211 is connected to the end of the discharge pipe 207 away from the filter tank 203, and the adapter 211 has a discharge channel 213 inside. One end of the discharge channel 213 communicates with the discharge pipe 207, and the other end of the discharge channel 213 is used to communicate with a storage device. The second bearing 212 is sleeved on the adapter 211 and is used to connect the storage device to rotatably connect the discharge pipe 207 and the storage device.

[0074] By setting up an adapter 211, the discharge pipe 207 is connected to the storage device, forming a continuous discharge channel 213. Thus, even as the filter tank 203 drives the discharge pipe 207 to rotate, the material can still be smoothly discharged through the discharge channel 213, achieving continuous filtration and discharge. The addition of a second bearing 212 improves the flexibility and stability of the connection between the discharge pipe 207 and the storage device, maintaining the continuity and stability of discharge even during rotation.

[0075] like Figure 4 As shown, in some embodiments of this application, the stirring rod 202 is recessed inward toward the end face of the filter tank 203 to form a receiving groove, at least a portion of the filter tank 203 is disposed in the receiving groove, and the stirring rod 202 is provided with a plurality of communicating holes 217 communicating with the receiving groove.

[0076] The design of the receiving tank increases the contact area between the stirring rod 202 and the filter tank 203, thereby expanding the effective stirring area, improving stirring efficiency, and allowing the material to be ground more thoroughly during the stirring process. The connecting hole 217 allows the material to flow freely between the receiving tank and the stirring rod 202, breaking up agglomeration and stratification. This flow promotes interaction and mixing between materials, further improving the stirring effect. The arrangement of the receiving tank and the connecting hole 217, combined with the opposite rotation of the stirring rod 202 and the filter tank 203, enables the stirring rod 202 to generate stronger shear and impact forces during stirring, effectively breaking down the adhesion between material particles, making them easier to disperse and mix.

[0077] In the above structure, by placing the filter tank 203 within the receiving tank, a larger mixing area and range are achieved between the filter tank 203 and the mixing tank 201. Within the same mixing time, materials can be mixed, homogenized, or dissolved more effectively, thus improving mixing efficiency.

[0078] In some embodiments of this application, the grinding apparatus 2 further includes a second drive motor 214, a pressure sensor 215, and a control component 216. The second drive motor 214 is connected to the stirring rod 202 and drives the stirring rod 202 to rotate inside the mixing tank 201. The pressure sensor 215 is disposed in the mixing tank 201 and is used to sense the air pressure inside the mixing tank 201. The control component 216 is electrically connected to the second drive motor 214 and the pressure sensor 215.

[0079] The second drive motor 214 is directly connected to the stirring rod 202. By precisely controlling the motor's speed and direction, the stirring rod 202 can be efficiently driven to rotate within the mixing tank 201. The grinding media balls can then make more thorough contact and collision with the material, thereby accelerating the grinding speed and improving the grinding quality.

[0080] Pressure sensor 215 is installed inside mixing tank 201 and can monitor changes in air pressure inside the tank in real time. When the air pressure exceeds the preset value, control component 216 can respond quickly by providing audible or visual alerts, adjusting the speed of the second drive motor 214, or stopping the motor, thereby further reducing the safety hazards caused by excessive pressure inside mixing tank 201.

[0081] Meanwhile, when the mesh 205 of the filter tank 203 becomes clogged, the material is pumped into the mixing tank 201 by the conveying pump, and the material output channel is blocked. As a result, the air pressure inside the mixing tank 201 gradually increases until it exceeds the preset value. By installing a pressure sensor 215, the real-time air pressure inside the mixing tank 201 can be monitored, which helps to promptly detect the clogging of the filter mesh 205 in the mixing tank 201, providing a time window for timely handling of the blockage and reducing the risk of equipment failure.

[0082] The control component 216 is electrically connected to the second drive motor 214 and the pressure sensor 215, enabling precise control of the grinding process. Through preset control strategies and algorithms, the control component 216 can automatically adjust the motor's operating state based on real-time monitored air pressure data to achieve optimal grinding effect and safety.

[0083] In the above structure, the control component 216 controls the second drive motor 214 to drive the stirring rod 202 to rotate, thereby improving the grinding efficiency. The pressure sensor 215 can detect the air pressure inside the mixing tank 201. When the air pressure exceeds the preset value, it can indicate the blockage of the filter screen 205 inside the mixing tank 201, allowing for timely handling of the blockage and reducing the risk caused by excessive pressure inside the mixing tank 201.

[0084] In some embodiments of this application, the control component 216 is electrically connected to the first drive motor 210.

[0085] When the mesh 205 of the filter tank 203 becomes clogged, the control component 216 responds quickly by adjusting the speed and direction of the first drive motor 210, causing the filter tank 203 to rotate rapidly. This rapid rotation helps to physically remove the material clogging the mesh 205, restoring its patency and ensuring that materials can pass smoothly through the filter tank 203 for filtration. This improves filtration efficiency and reduces filtration interruptions and material waste caused by mesh 205 clogging.

[0086] Connecting the first drive motor 210 to the control component 216 enables automated control of the filtration process. Operators only need to set the corresponding parameters and strategies through the control component 216 to achieve precise control of key parameters such as the rotation speed and rotation time of the filter tank 203. This automated control reduces the frequency and difficulty of manual intervention, improving the operating efficiency and stability of the equipment.

[0087] In the above structure, the first drive motor 210 is connected to the control component 216. When the mesh 205 of the filter tank 203 is blocked, the control component 216 can be used to control the first drive motor 210 to drive the filter tank 203 to rotate quickly, clearing the material blocking the mesh 205, so that the material in the mesh 205 can be filtered smoothly, thus improving the filtration efficiency.

[0088] like Figure 5 As shown, in some embodiments of this application, the grinding device 2 further includes a moving component, which includes a fixed block 218 and a connecting rod 219. The fixed block 218 is disposed in the mixing tank 201 and has a through hole. One end of the connecting rod 219 is connected to the movable protective shell 208, and the other end of the connecting rod 219 passes through the through hole and is slidably connected to the fixed block 218. The connecting rod 219 extends axially along the rotating shaft 204, and the connecting rod 219 can move relative to the fixed block 218 and drive the filter assembly to move out of the mixing tank 201.

[0089] A detachable connection between the filter assembly and the mixing tank 201 is achieved by setting a fixing block 218 and a connecting rod 219. One end of the connecting rod 219 is connected to the movable housing 208, and the other end passes through a through hole in the fixing block 218 and is slidably connected to the fixing block 218. This design allows the operator to easily remove the movable housing 208 (and the filter assembly connected to it) from the mixing tank 201 by pulling the connecting rod 219. The disassembly and installation of the filter assembly can be completed quickly without complicated tools or cumbersome steps, improving the convenience of operation.

[0090] The design of the movable components allows the grinding unit 2 to adapt more flexibly to different working environments and material requirements. When the filter components need to be replaced or cleaned, the operator can quickly remove them from the mixing tank 201 without affecting the normal operation of the mixing tank 201 itself or other components.

[0091] In the above structure, the connecting rod 219 is connected to the mixing tank 201 by setting a fixing block 218. The other end of the connecting rod 219 is connected to the movable protective shell 208. By pulling the connecting rod 219, the movable protective shell 208 is separated from the mixing tank 201, thereby realizing the disassembly of the filter assembly and improving the convenience of disassembly and installation of the filter assembly.

[0092] In some optional embodiments of this application, the grinding device 2 includes a mixing tank 201, a stirring rod 202, and a filtering assembly. The mixing tank 201 is used to contain materials and grinding media balls. The stirring rod 202 is disposed inside the mixing tank 201, and the mixing tank 201 can rotate to drive the materials and grinding media balls to grind. The filtering assembly includes a filtering tank 203 and a rotating shaft 204. The filtering tank 203 is disposed inside the mixing tank 201. The filtering tank 203 has a receiving cavity, and the filtering tank 203 is provided with a plurality of mesh holes 205 communicating with the receiving cavity. The mesh holes 205 are used to filter out the ground powder. The rotating shaft 204 is connected to the filtering tank 203 and can drive the filtering tank 203 to rotate around the axial direction. The mixing tank 201 is provided with a discharge port 206, and the filtering assembly also includes a discharge pipe 207. One end of the discharge pipe 207 communicates with the receiving cavity, and the other end of the discharge pipe 207 extends out from the discharge port 206. The discharge pipe 207 is located inside the rotating shaft 204 and is coaxial with the shaft. The filter assembly also includes a movable protective shell 208, which is detachably installed on the outside of the mixing tank 201 away from the stirring rod 202. The end of the rotating shaft 204 away from the stirring rod 202 is connected to the movable protective shell 208. The filter assembly also includes a first bearing 209, which is located inside the movable protective shell 208 and is sleeved on the outside of the rotating shaft 204 to rotatably connect the movable protective shell 208 and the rotating shaft 204. The filter assembly also includes a second sealing element sleeved between the rotating shaft 204 and the movable protective shell 208. The second sealing element improves the sealing performance between the rotating shaft 204 and the movable protective shell 208. The filter assembly also includes a first drive motor 210, which is connected to the rotating shaft 204 and drives the rotating shaft 204 to rotate. The first drive motor 210 is installed in the movable protective shell 208. The filter assembly also includes an adapter 211 and a second bearing 212. The adapter 211 is connected to the end of the discharge pipe 207 away from the filter tank 203, and the adapter 211 has a discharge channel 213 inside. One end of the discharge channel 213 communicates with the discharge pipe 207, and the other end of the discharge channel 213 is used to communicate with the storage device. The second bearing 212 is sleeved on the adapter 211 and is used to connect the storage device to rotatably connect the discharge pipe 207 and the storage device. The grinding device 2 also includes a moving assembly, which includes a fixed block 218 and a connecting rod 219. The fixed block 218 is located in the mixing tank 201 and has a through hole. One end of the connecting rod 219 is connected to the movable protective shell 208, and the other end of the connecting rod 219 passes through the through hole and is slidably connected to the fixed block 218. The connecting rod 219 extends axially along the rotating shaft 204 and can move relative to the fixed block 218 to move the filter assembly out of the mixing tank 201.

[0093] Embodiments of this application also provide a battery manufacturing apparatus, which includes the grinding device 2 described in the above embodiments. Exemplarily, the grinding device 2 is used to grind the electrode active material slurry in the battery cell 1. By setting a stirring tank 201 to accommodate the material to be ground and the grinding media balls, the entry of external impurities into the grinding tank and their contamination of the raw materials is reduced. The rotating stirring rod 202 drives the grinding media balls and the material to move, and during the movement, they rub and squeeze against each other. The high-hardness grinding media balls can crush and grind the material. A mesh 205 with a preset aperture is provided on the filter assembly, allowing the ground material to pass through and collecting the material into the receiving cavity. In particular, by setting a rotating shaft 204 in the filter assembly to drive the filter tank 203 to rotate, during the rotation, the centrifugal force generated by the filter tank 203 throws out the material blocking the mesh 205 to clear the mesh 205. After rotation, the filter tank 203 can continue to collect material without disassembling and cleaning it. This extends the filtration and cleaning cycle, reduces the time wasted on cleaning, and improves production efficiency.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A grinding device, characterized by, include: A mixing tank is used to hold materials and grinding media balls; A stirring rod is disposed inside the mixing tank, which is capable of rotating and driving the material and grinding media balls to grind. A filtration assembly includes a filter tank and a rotating shaft. The filter tank is disposed inside the mixing tank. The filter tank has a receiving cavity and is provided with a plurality of mesh holes communicating with the receiving cavity. The mesh holes are used to filter out the ground powder. The rotating shaft is connected to the filter tank and can drive the filter tank to rotate around the axial direction.

2. The polishing apparatus according to claim 1, wherein The mixing tank is provided with a discharge port, and the filter assembly also includes a discharge pipe. One end of the discharge pipe is connected to the receiving cavity, and the other end of the discharge pipe extends out from the discharge port.

3. The abrading device of claim 2, wherein, The filter assembly further includes a first seal disposed between the rotating shaft and the mixing tank, the first seal being disposed inside the discharge port.

4. The abrading device of claim 2, wherein, The discharge pipe is located inside the rotating shaft and is coaxial with the rotating shaft.

5. The abrading device of claim 4, wherein, The filter assembly also includes a movable housing, which is detachably installed on the outside of the mixing tank away from the stirring rod, and the end of the rotating shaft away from the stirring rod is connected to the movable housing.

6. The abrading device of claim 5, wherein, The filter assembly further includes a first bearing, which is disposed inside the movable housing and sleeved on the outside of the rotating shaft to rotatably connect the movable housing to the rotating shaft.

7. The abrading device of claim 5, wherein, The filter assembly also includes a second seal sleeved between the rotating shaft and the movable housing.

8. The abrading device of claim 5, wherein, The filter assembly also includes a first drive motor, which is connected to the rotating shaft and drives the rotating shaft to rotate. The first drive motor is mounted on the movable housing.

9. The grinding device according to any one of claims 2-8, characterized in that, The filtering component also includes: An adapter is connected to the end of the discharge pipe away from the filter tank. The adapter has a discharge channel inside. One end of the discharge channel is connected to the discharge pipe, and the other end of the discharge channel is used to connect to a storage device. The second bearing is sleeved on the outside of the adapter and is used to connect the storage device so as to rotatably connect the discharge pipe to the storage device.

10. The grinding device according to any one of claims 1-8, characterized in that, The stirring rod is recessed into the end face facing the filter tank to form a receiving groove, at least a portion of the filter tank is disposed in the receiving groove, and the stirring rod is provided with a plurality of communicating holes communicating with the receiving groove.

11. The abrading device of claim 8, wherein, The grinding apparatus further includes: The second drive motor is connected to the stirring rod and drives the stirring rod to rotate inside the mixing tank; A pressure sensor is installed in the mixing tank, and the pressure sensor is used to sense the air pressure inside the mixing tank; The control component is electrically connected to the second drive motor and the pressure sensor.

12. The abrading device of claim 11, wherein, The control component is electrically connected to the first drive motor.

13. The lapping apparatus of any one of claims 5-8, wherein, The grinding apparatus further includes a moving component, the moving component comprising: A fixing block is provided on the mixing tank, and the fixing block is provided with a through hole; A connecting rod is connected at one end to the movable protective shell and at the other end to the fixed block through the through hole. The connecting rod extends axially along the rotating shaft and can move relative to the fixed block to move the filter assembly out of the mixing tank.

14. A battery manufacturing apparatus, characterized by comprising: The grinding apparatus includes any one of claims 1-13.

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