Slurry processing equipment and battery production system

Abstract

This application relates to a slurry processing apparatus and a battery production system. The slurry processing apparatus includes a stirring mechanism, a filtering mechanism, and a return pipeline. The stirring mechanism receives and disperses the slurry. The filtering mechanism is located downstream of the stirring mechanism and filters the slurry. The return pipeline returns the filtered slurry to the stirring mechanism. The filtering mechanism includes a filter tank, a filter assembly, and a pressure relief assembly. The filter assembly is located inside the filter tank and filters the slurry. The pressure relief assembly is located inside the filter tank and releases pressure when the pressure of the filter assembly reaches a set threshold. A battery production system includes the aforementioned slurry processing apparatus. In the aforementioned slurry processing apparatus and battery production system, when the pressure of the filter assembly reaches a set threshold, the pressure relief assembly can open and release pressure, allowing the pressure relief assembly to perform subsequent filtration normally, thereby greatly improving the filtration efficiency and filtration effect of the slurry processing apparatus.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a slurry processing device and a battery production system. Background Technology

[0002] With the popularization and promotion of new energy vehicles, their charging and discharging performance and range are increasingly attracting attention and importance. Power batteries, a type of rechargeable battery, are the power source for new energy vehicles and are widely used in the field.

[0003] In the production process of lithium batteries, positive and negative electrode sheets need to be made. This involves mixing solvents and binders with powdered positive and negative electrode active materials, stirring them evenly to form a slurry, coating the positive and negative electrode slurry onto the surface of metal foil sheets, and then drying it to form the positive and negative electrode sheets. Before coating the slurry, a slurry processing device is needed to stir and filter the slurry. Existing slurry processing devices have poor filtration efficiency and effect, resulting in the agglomeration of large particles and other impurities in the slurry, affecting the coating effect and ultimately impacting battery quality. Utility Model Content

[0004] Therefore, it is necessary to provide a slurry processing device and a battery production system to address the problem of poor filtration efficiency and effect of existing slurry processing devices.

[0005] A slurry processing apparatus includes a stirring mechanism, a filtering mechanism, and a return pipeline. The stirring mechanism receives and disperses slurry, the filtering mechanism is located downstream of the stirring mechanism and filters the slurry, and the return pipeline returns the filtered slurry to the stirring mechanism. The filtering mechanism includes a filter tank, a filtering assembly, and a pressure relief assembly. The filtering assembly is located inside the filter tank and filters the slurry. The pressure relief assembly is located inside the filter tank and releases pressure when the pressure of the filtering assembly reaches a set threshold. The filtering assembly includes at least two first filter elements, all of which are spaced apart from top to bottom. Each first filter element corresponds to at least one pressure relief assembly. The pressure relief assembly is configured to open when the pressure of its corresponding first filter element reaches the set threshold, allowing the slurry on that first filter element to fall onto the next first filter element. The pressure relief assembly includes a fixed plate, a baffle, and a pressure relief component. The baffle is connected to the first filter element, and the fixed plate is connected to the filter tank. The pressure relief component is located between the fixed plate and the baffle and can be flipped relative to the fixed plate to open and close the pressure relief assembly. The aforementioned slurry processing device, by setting up a return pipeline, allows the slurry filtered by the filter assembly to flow back to the stirring mechanism for re-stirring and re-filtration, thereby improving the dispersion uniformity and purity of the slurry. In addition, when the pressure of the filter assembly reaches a set threshold, the pressure relief assembly can open and release the pressure, allowing the pressure relief assembly to perform subsequent filtration normally. This reduces the probability of equipment damage or decreased filtration efficiency due to excessive pressure, thus greatly improving the filtration efficiency and filtration effect of the slurry processing device.

[0006] In some embodiments, the slurry processing apparatus further includes a controller, and the filter assembly includes a pressure detection element electrically connected to the controller. Each first filter element has at least one pressure detection element. The pressure detection element is used to detect the pressure of the first filter element, and the controller is configured to activate the corresponding pressure relief component when the pressure of the first filter element reaches a set threshold. Thus, the slurry processing apparatus integrates pressure detection and intelligent control, enabling it to have greater adaptability and flexibility when dealing with slurries of different characteristics, and to maintain stable performance during long-term operation.

[0007] In some embodiments, each first filter element has at least one pressure relief component on each side along its length; and / or, each first filter element has at least one pressure relief component on each side along its width. Thus, the multi-sided arrangement of the pressure relief components can be flexibly combined according to the actual filtration load and slurry characteristics, enabling a more even distribution of the pressure load and improving overall filtration efficiency and consistency in slurry treatment.

[0008] In some embodiments, the first filter element is a filter screen, and the mesh size of each filter screen gradually increases from top to bottom. In this way, by making the mesh size of each filter screen gradually increase from top to bottom, the slurry can achieve gradient filtration from coarse to fine as it falls layer by layer, effectively removing impurity particles of different sizes.

[0009] In some embodiments, the filtration assembly includes three first filter elements: the top first filter element has a mesh size of 100 mesh, the middle first filter element has a mesh size of 150 mesh, and the bottom first filter element has a mesh size of 200 mesh. This not only effectively extends the service life of each filter layer but also significantly reduces the risk of rapid clogging caused by a single high-precision filter.

[0010] In some embodiments, the filtration mechanism further includes a discharge pipe and a second filter element. The discharge pipe connects the stirring mechanism and the filtration mechanism. The mesh size of the second filter element is smaller than that of each of the first filter elements. The second filter element is disposed in the discharge pipe, and / or disposed in the filter tank and located upstream of each of the first filter elements. Thus, by providing a second filter element in the discharge pipe or at the inlet of the filter tank, large particulate impurities can be effectively intercepted, reducing the load on the subsequent first filter elements, extending the operating cycle of the entire filtration system, and reducing the cleaning frequency.

[0011] In some embodiments, the filtration mechanism further includes a filter shaft and a filter drive. The filter shaft is located inside the filter tank and downstream of each of the first filter elements, and the filter drive is drively connected to the filter shaft. This further shearing and homogenization of the slurry after multi-stage filtration helps promote sufficient flow and uniform distribution of the slurry before discharge, thus improving the consistency of the slurry's discharge concentration.

[0012] In some embodiments, the slurry processing apparatus further includes a diverter, a coating pipeline, and a coating mechanism. The diverter is located at the outlet of the filter tank and is connected to both the return pipeline and the coating pipeline. The coating mechanism is connected to the coating pipeline and is used to coat the filtered slurry. This achieves intelligent diversion of the slurry according to its quality status after filtration, ensuring the quality requirements of the coating process and reducing the probability of resource waste and product defects caused by substandard slurry directly entering subsequent processes.

[0013] In some embodiments, the slurry processing device further includes a first flow detection element and a second flow detection element, with the first flow detection element located in the coating pipeline and the second flow detection element located in the return pipeline. This allows for real-time monitoring of the flow rate in each pipeline and determination of the slurry flow state based on the flow rate, thereby providing accurate feedback to the system and facilitating subsequent closed-loop control of the slurry processing process.

[0014] In some embodiments, the slurry processing apparatus further includes a cleaning mechanism located outside the filter tank and used to clean the first filter element. In this way, the cleaning mechanism can effectively remove residual slurry adhering to the first filter element, restore filtration performance, and maintain the continuity and stability of the slurry processing process.

[0015] In some embodiments, the cleaning mechanism includes a cleaning tank, a backwashing component, and an ultrasonic cleaning component. The ultrasonic cleaning component is disposed in the cleaning tank and is used for ultrasonic cleaning of the first filter element, while the backwashing component is used to backwash the first filter element. This allows for flexible selection of the cleaning method based on the degree of clogging of the first filter element and the characteristics of the slurry, effectively restoring the permeability of the first filter element and reducing the risk of slurry processing continuity being affected by filter clogging.

[0016] In some embodiments, the stirring mechanism includes a stirring tank, a stirring assembly, and a dispersing assembly. The stirring assembly is rotatably disposed in the center of the stirring tank and is used to stir the slurry. The dispersing assembly is rotatably disposed inside the stirring tank and is distributed at intervals with the stirring assembly. In this way, the stirring assembly can fully mix the components of the slurry and maintain circumferential flow, while the dispersing assembly breaks up agglomerates through the strong shear force generated by high-speed rotation, significantly improving the uniformity and stability of the slurry and reducing the probability of particle agglomeration and sedimentation in the slurry.

[0017] In some embodiments, the rotational speed of the dispersing component is greater than that of the stirring component. This reduces overall energy consumption while improving dispersion, lowers the risk of coating defects caused by particle agglomeration or uneven distribution, and significantly enhances slurry stability and coating uniformity.

[0018] A battery production system includes the aforementioned slurry processing device. In this system, a return pipeline is provided, allowing the slurry filtered by the filtration assembly to flow back to the stirring mechanism for further stirring and filtration. This improves the uniformity and purity of the slurry dispersion. Furthermore, when the pressure in the filtration assembly reaches a set threshold, a pressure relief assembly opens and releases the pressure, enabling the pressure relief assembly to continue subsequent filtration normally. This reduces the probability of equipment damage or decreased filtration efficiency due to excessive pressure, thereby significantly improving the filtration efficiency and effect of the slurry processing device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a slurry processing apparatus in some embodiments of this application.

[0020] Figure 2 for Figure 1 A schematic diagram of the filtration mechanism in the slurry treatment device shown.

[0021] Figure 3 for Figure 2 A cross-sectional schematic diagram of the filter mechanism shown.

[0022] Figure 4 for Figure 2 A schematic diagram of the fixed plate in the filter mechanism shown.

[0023] Figure 5 for Figure 2 A schematic diagram of the pressure relief component in the filter mechanism shown.

[0024] Figure label:

[0025] 100. Stirring mechanism; 110. Stirring tank; 120. Stirring assembly; 121. Stirring drive component; 122. Stirring shaft; 123. Stirring blades; 130. Dispersion assembly; 131. Dispersion drive component; 132. Dispersion shaft; 133. Dispersion blades;

[0026] 200, Filtration mechanism; 210, Filtration tank; 220, Filtration assembly; 221, First filter element; 222, Pressure detection element; 230, Pressure relief assembly; 231, Fixing plate; 231a, Slot; 232, Baffle; 233, Pressure relief element; 233a, Connecting shaft; 240, Discharge pipeline; 241, First screw pump; 250, Second filter element; 260, Filtration shaft; 270, Filtration drive element;

[0027] 300. Return line; 301. Third screw pump;

[0028] 410. Flow divider; 420. Coating pipeline; 421. Second screw pump; 430. Coating mechanism; 500. First flow detection element; 600. Second flow detection element;

[0029] 700. Cleaning mechanism; 710. Cleaning tank; 720. Backflushing cleaning component; 730. Ultrasonic cleaning component. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0036] 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.

[0037] 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.

[0038] With the popularization and promotion of new energy vehicles, their charging and discharging performance and range are increasingly attracting attention and importance. Power batteries, a type of rechargeable battery, are the power source for new energy vehicles and are widely used in the field.

[0039] In the production process of lithium batteries, positive and negative electrode sheets need to be made. This involves mixing solvents and binders with powdered positive and negative electrode active materials, stirring them evenly to form a slurry, coating the positive and negative electrode slurry onto the surface of metal foil sheets, and then drying it to form the positive and negative electrode sheets. Before coating the slurry, a slurry processing device is needed to stir and filter the slurry. Existing slurry processing devices have poor filtration efficiency and effect, resulting in the agglomeration of large particles and other impurities in the slurry, affecting the coating effect and ultimately impacting battery quality.

[0040] Based on the above considerations, and after in-depth research, a slurry processing device and a battery production system were designed. By setting up a return pipeline, the slurry filtered by the filter assembly will flow back to the stirring mechanism for re-stirring and re-filtration, which can improve the dispersion uniformity and purity of the slurry. In addition, when the pressure of the filter assembly reaches a set threshold, the pressure relief component can open and release the pressure, allowing the pressure relief component to carry out subsequent filtration normally. This reduces the probability of equipment damage or decreased filtration efficiency due to excessive pressure, thereby greatly improving the filtration efficiency and filtration effect of the slurry processing device.

[0041] Please refer to Figures 1 to 3 In one embodiment, the slurry processing device includes a stirring mechanism 100, a filtering mechanism 200, and a return pipeline 300. The stirring mechanism 100 is used to receive and disperse slurry. The filtering mechanism 200 is located downstream of the stirring mechanism 100 and is used to filter the slurry. The return pipeline 300 is used to return the slurry filtered by the filtering mechanism 200 to the stirring mechanism 100. The filtering mechanism 200 includes a filter tank 210, a filter assembly 220, and a pressure relief assembly 230. The filter assembly 220 is located in the filter tank 210 and is used to filter the slurry. The pressure relief assembly 230 is located in the filter tank 210 and is used to release pressure when the pressure of the filter assembly 220 reaches a set threshold.

[0042] It should be noted that, firstly, the main and auxiliary materials to be mixed are added to the mixing mechanism 100. The mixing mechanism 100 mixes the main and auxiliary materials evenly to form a slurry. Then, the slurry is initially filtered by the filter assembly 220. The slurry after the initial filtration is returned to the mixing mechanism 100 through the return pipe 300 for further mixing and filtration by the filter assembly 220. This cycle is repeated until the filtered slurry meets the requirements. At this point, mixing and filtration are stopped, and the slurry in the filter assembly 200 can be output to the next mechanism for subsequent processes (such as coating). During the filtration process, a filter cake layer is formed on the filter assembly 220. As the thickness of the filter cake layer gradually increases, the pressure of the filter assembly 220 gradually increases. When the pressure of the filter assembly 220 reaches a set threshold, the pressure relief assembly 230 can open and release the pressure, allowing the pressure relief assembly 230 to perform subsequent filtration normally.

[0043] Optionally, the slurry can be any one of the positive electrode slurry, negative electrode slurry, or auxiliary material slurry of a lithium battery.

[0044] In the embodiments of this application, the stirring mechanism 100 is a component used to receive and disperse slurry. The stirring mechanism 100 can adopt various structural forms. The stirring mechanism 100 has an inlet, a reflux outlet, and a outlet. The inlet is used to input slurry, the outlet is connected to the filtration mechanism 200 and used to output slurry, and the reflux outlet is connected to the reflux pipeline 300 and used to input filtered slurry. The inlet, reflux outlet, and outlet can be located on different sides of the stirring mechanism 100 to allow slurry input, output, and reflux in different directions, reducing the probability of mutual interference between slurry input, output, and reflux, and improving the efficiency of slurry stirring and filtration.

[0045] In the embodiments of this application, the filtration mechanism 200 is a component located downstream of the stirring mechanism 100 and used for filtering slurry. The filtration mechanism 200 includes a filter tank 210, a filter assembly 220, and a pressure relief assembly 230. The filter tank 210 is a component that provides housing space for each assembly. The filter tank 210 can adopt various shapes and structures, such as cylindrical, square, or other suitable forms, to meet different production needs and space layouts. The filter assembly 220 is located inside the filter tank 210 and is used to filter the slurry. The filter assembly 220 is typically composed of multiple layers of filter screens, which can effectively intercept impurity particles in the slurry while allowing the slurry to pass through smoothly. The pressure relief assembly 230 is located inside the filter tank 210 and is used to release pressure when the pressure of the filter assembly 220 reaches a set threshold. The structural design of the pressure relief assembly 230 can be adjusted according to actual production needs. For example, by replacing pressure relief components 233 of different specifications, it can adapt to different pressure ranges, thereby improving the applicability and stability of the equipment.

[0046] In the embodiments of this application, the return pipe 300 is a component used to re-transport the slurry filtered by the filtration mechanism 200 back to the stirring mechanism 100. The return pipe 300 can be made of flexible or rigid materials and can be designed as a straight line, a bent line, or other suitable form according to actual layout requirements.

[0047] The aforementioned slurry processing device, through the reflux pipeline 300, allows the slurry filtered by the filter assembly 220 to flow back to the stirring mechanism 100 for re-stirring and re-filtration, thereby improving the dispersion uniformity and purity of the slurry. Furthermore, when the pressure of the filter assembly 220 reaches a set threshold, the pressure relief assembly 230 can open and release the pressure, enabling the pressure relief assembly 230 to perform subsequent filtration normally. This reduces the probability of equipment damage or decreased filtration efficiency due to excessive pressure, thus greatly improving the filtration efficiency and effect of the slurry processing device.

[0048] Based on some embodiments in this application, please refer to Figures 1 to 3 The filter assembly 220 includes at least two first filter elements 221, all of which are spaced apart from top to bottom. Each first filter element 221 is provided with at least one pressure relief assembly 230. The pressure relief assembly 230 is configured to open when the pressure of the corresponding first filter element 221 reaches a set threshold, so that the slurry on the first filter element 221 falls onto the next first filter element 221.

[0049] It is understandable that all the first filter elements 221 are spaced apart from top to bottom, meaning that after the slurry enters the filter tank 210, it can flow sequentially through each first filter element 221 from top to bottom to achieve fine filtration of the slurry. Since each first filter element 221 works in conjunction with its corresponding pressure relief component 230, when the pressure of a certain first filter element 221 reaches a set threshold, the pressure relief component 230 will automatically open, guiding the slurry on the first filter element 221 to the next first filter element 221 for further filtration.

[0050] In the embodiments of this application, all the first filter elements 221 are arranged at intervals from top to bottom, and the spacing of each first filter element 221 can be adjusted according to the characteristics of the slurry and the filtration requirements. For example, for slurries containing large particulate impurities, the spacing between the upper first filter element 221 and the lower first filter element 221 can be appropriately increased, resulting in good filtration effect and preventing the first filter element 221 from clogging too quickly; for slurries with small and uniformly distributed impurity particles, an equal spacing or a denser arrangement can be used to improve the efficiency and accuracy of fine filtration.

[0051] In the embodiments of this application, the specific structure of each first filter element 221 can be designed in different forms according to actual needs. For example, the first filter element 221 may include a support frame and multiple layers of filter media mounted on the support frame. These filter media may be metal wire mesh, fiber fabric, or other suitable filter media. The first filter elements 221 at different levels may also be selected with filter media of different pore sizes, so that the filtration process from top to bottom is gradually refined, thereby better separating various impurities in the slurry.

[0052] With the above setup, the slurry is filtered in layers through multiple first filter elements 221 to achieve fine filtration of the slurry. Since each first filter element 221 works in coordination with its corresponding pressure relief component 230, it can not only improve the filtration efficiency and reduce the risk of clogging of the first filter element 221, but also further improve the filtration efficiency and the purity of the slurry.

[0053] Based on some embodiments in this application, please refer to Figure 2 The slurry processing device also includes a controller, and the filter assembly 220 also includes a pressure detection element 222 electrically connected to the controller. Each first filter assembly 221 is provided with at least one pressure detection element 222. The pressure detection element 222 is used to detect the pressure of the first filter assembly 221. The controller is configured to open the corresponding pressure relief assembly 230 when the pressure of the first filter assembly 221 reaches a set threshold.

[0054] Understandably, the controller is able to accurately monitor the pressure status of each first filter element 221 and control the opening and closing of the pressure relief assembly 230 according to a preset threshold.

[0055] In the embodiments of this application, each first filter element 221 is provided with at least one pressure detection element 222. That is, each first filter element 221 may be provided with one or at least two pressure detection elements 222. The installation position and number of pressure detection elements 222 can be flexibly adjusted according to actual production needs. The pressure detection element 222 can monitor the pressure change of the first filter element 221 in real time and transmit the detected pressure data to the controller. Optionally, the pressure detection element 222 is a high-sensitivity sensor, or it may be a pressure gauge or other device capable of accurately measuring pressure.

[0056] With the above settings, the slurry processing device integrates pressure detection and intelligent control, enabling it to have greater adaptability and flexibility when dealing with slurries of different characteristics, and to maintain stable performance during long-term operation.

[0057] Based on some embodiments in this application, please refer to Figures 3 to 5The pressure relief assembly 230 includes a fixed plate 231, a baffle 232, and a pressure relief component 233. The baffle 232 is connected to the first filter element 221, and the fixed plate 231 is connected to the filter tank 210. The pressure relief component 233 is located between the fixed plate 231 and the baffle 232, and the pressure relief component 233 can be flipped relative to the fixed plate 231 to realize the opening and closing of the pressure relief assembly 230.

[0058] It should be noted that when the pressure of the first filter element 221 does not reach the set threshold, the pressure relief component 230 is closed, and the pressure relief component 233 is in the first position to close the pressure relief channel; when the pressure of the first filter element 221 reaches the set threshold, the pressure relief component 230 is opened, and the pressure relief component 233 is flipped to the second position to open the pressure relief channel. The slurry flows from the current first filter element 221 into the next layer of first filter element 221 through the opened pressure relief channel to continue filtration.

[0059] In the embodiments of this application, the pressure relief component 233 is a component disposed between the fixed plate 231 and the baffle 232 and capable of flipping relative to the fixed plate 231. The pressure relief component 233 can be flipped in various ways. For example, the pressure relief component 233 is provided with a connecting shaft 233a, and the fixed plate 231 is provided with a slot 231a. The connecting shaft 233a is rotatably disposed in the slot 231a, keeping the pressure relief component 233 in the closed position when the pressure does not reach the threshold; when the pressure reaches the set threshold, force is applied to flip the pressure relief component 233 to the open position, thereby opening the pressure relief channel. In addition, the flipping angle and opening speed of the pressure relief component 233 can be optimized according to the actual working conditions to further improve the accuracy and stability of pressure relief control. The pressure relief component 233 can have various structural forms. For example, the pressure relief component 233 can be a single plate structure disposed between the fixed plate 231 and the baffle 232, or it can be multiple plate structures disposed between the fixed plate 231 and the baffle 232.

[0060] In the embodiments of this application, the baffle 232 is a component connected to the first filter element 221. The baffle 232 not only supports the pressure relief component 233, but also serves as a guide structure for the slurry flow path, guiding the slurry to flow smoothly to the next first filter element 221 when the pressure relief channel is open. The baffle 232 and the first filter element 221 can be connected in various ways. For example, the baffle 232 and the first filter element 221 can be separate structures, and the two can be fixedly connected by bolts, clips, or welding; or the baffle 232 and the first filter element 221 can be integrally molded to enhance the integrity and sealing of the structure.

[0061] In the embodiments of this application, the fixing plate 231 is a component connected to the filter tank 210. The fixing plate 231 and the filter tank 210 can be connected in various ways, such as by bolts, welding, or other reliable connection methods, so that the pressure relief assembly 230 has good structural strength and sealing performance under high pressure. Furthermore, the fixing plate 231 can also be pull-out type and installed inside the filter tank 210 to facilitate subsequent removal of the filter screen for cleaning. For example, a guide groove is provided inside the filter tank 210, and a guide rail is provided on the fixing plate 231. The guide rail and the guide groove are slidably connected to realize the removal of the fixing plate 231.

[0062] With the above-mentioned configuration, the structural design of the pressure relief component 230 takes into account both reliability and maintainability. It can not only respond promptly when the pressure is abnormal, but also facilitate daily cleaning and replacement of filter components, thereby extending the service life of the equipment and ensuring the stability of continuous production.

[0063] Based on some embodiments in this application, please refer to Figure 2 Each first filter element 221 has at least one pressure relief component 230 on each side along its length direction; and / or, each first filter element 221 has at least one pressure relief component 230 on each side along its width direction.

[0064] It should be noted that the length direction of the first filter element 221 is... Figure 2 As shown in the X direction, the width direction of the first filter element 221 is... Figure 2 Y direction shown.

[0065] In the embodiments of this application, each first filter element 221 is provided with at least one pressure relief component 230 on both sides along its own length direction, that is: each first filter element 221 along its own length direction is provided with at least one pressure relief component 230 on both sides. Figure 2 The pressure relief components 230 are set on both sides of the X direction as shown, which helps the slurry to flow symmetrically in the transverse direction during pressure relief, reduces the phenomenon of flow deviation, and improves the uniformity of the lower layer filtration.

[0066] In the embodiments of this application, each first filter element 221 is provided with at least one pressure relief component 230 on both sides along its own width direction, that is: each first filter element 221 along its own width direction is provided with at least one pressure relief component 230 on both sides. Figure 2 The pressure relief components 230 are provided on both sides of the Y direction as shown, which can further enhance the symmetry and stability of pressure release, and are especially suitable for applications with large-area filters or high flow conditions.

[0067] With the above settings, the multi-sided arrangement of the pressure relief component 230 can be flexibly combined according to the actual filtration load and slurry characteristics, which can more evenly distribute the pressure load and improve the overall filtration efficiency and consistency of slurry treatment.

[0068] Based on some embodiments in this application, please refer to Figure 1 The first filter element 221 is a filter screen, and the mesh size of each filter screen gradually increases from top to bottom.

[0069] It is understandable that the mesh count of a filter, that is, the number of mesh holes per unit area, is higher. The higher the mesh count, the smaller the mesh holes, and the higher the filtration accuracy.

[0070] In the embodiments of this application, the mesh size of each filter screen gradually increases from top to bottom. The upper filter screen intercepts larger particles, while the lower filter screen captures finer impurities, thereby significantly improving the purity and uniformity of the final slurry. The mesh size of each filter screen can be configured in a gradient according to the particle size distribution of impurities in the slurry to achieve progressively fine filtration.

[0071] With the above settings, by gradually increasing the mesh size of each filter screen from top to bottom, the slurry can achieve gradient filtration from coarse to fine as it falls layer by layer, effectively removing impurity particles of different sizes.

[0072] Based on some embodiments in this application, please refer to Figure 1 The filter assembly 220 includes three first filter elements 221. The first filter element 221 of the uppermost layer has a mesh size of 100 mesh, the first filter element 221 of the middle layer has a mesh size of 150 mesh, and the first filter element 221 of the lowermost layer has a mesh size of 200 mesh.

[0073] In the embodiments of this application, the filter assembly 220 includes three first filter elements 221. The uppermost first filter element 221 is used to intercept impurities with larger particle sizes, the middle layer further removes medium-sized particles, and the bottom layer performs fine filtration of microparticles, thereby forming a complete three-stage gradient filtration system. The three first filter elements 221 can be of the same or different filter mesh structures, and the specific selection depends on the chemical properties, viscosity, and target filtration accuracy of the slurry. For example, the upper layer can be made of high-strength, large-pore-size stainless steel mesh to withstand the initial impact load, while the lower layer uses a high-mesh polyester fiber mesh to improve the interception capacity of microparticles. In addition, the installation angle of the three filter meshes can also be designed to be horizontal or slightly inclined to facilitate uniform distribution of the filter cake and smooth transfer of the slurry during pressure relief.

[0074] By implementing the above settings, not only is the service life of each filter layer effectively extended, but the risk of rapid clogging caused by a single high-precision filter is also significantly reduced.

[0075] Based on some embodiments in this application, please refer to Figure 1The filtration mechanism 200 also includes a discharge pipe 240 and a second filter element 250. The discharge pipe 240 is connected to the stirring mechanism 100 and the filtration mechanism 200. The mesh size of the second filter element 250 is smaller than that of the first filter element 221. The second filter element 250 is disposed in the discharge pipe 240 and / or the second filter element 250 is disposed in the filter tank 210 and located upstream of each of the first filter elements 221.

[0076] It should be noted that when the second filter element 250 is installed in the discharge pipe 240, the slurry undergoes preliminary purification by passing through the second filter element 250 before entering the filter tank 210; when the second filter element 250 is installed inside the filter tank 210 and located upstream of each of the first filter elements 221, the slurry undergoes preliminary purification by passing through the second filter element 250 before entering each of the first filter elements 221, and the second filter element 250 intercepts larger particle impurities in the slurry.

[0077] In the embodiments of this application, the second filter element 250 is a component used for coarse filtration of slurry. The pore size of the second filter element 250 is usually larger than that of the uppermost first filter element 221. Its material can be a wear-resistant and corrosion-resistant metal mesh or a porous plate structure to adapt to working conditions with high flow rate and high impurity content.

[0078] In the embodiments of this application, the discharge pipe 240 is a component used to connect the stirring mechanism 100 and the filtering mechanism 200. The discharge pipe 240 can be made of corrosion-resistant and wear-resistant pipe materials, such as stainless steel or engineering plastics, and its routing can be flexibly arranged according to the on-site installation space. In addition, a first screw pump 241 can be installed on the discharge pipe 240. The first screw pump 241 is used to provide stable slurry conveying power, so that the slurry flows evenly in the pipe and reduces the risk of sedimentation or blockage. The rotation speed of the first screw pump 241 can be adjusted according to process requirements to match the conveying requirements of slurries with different viscosities.

[0079] With the above settings, by installing a second filter element 250 at the discharge pipe 240 or at the inlet of the filter tank 210, large particulate impurities can be effectively intercepted, reducing the load on the subsequent first filter element 221, extending the operating cycle of the entire filtration system and reducing the cleaning frequency.

[0080] Based on some embodiments in this application, please refer to Figure 1 The filtration mechanism 200 also includes a filter shaft 260 and a filter drive 270. The filter shaft 260 is located inside the filter tank 210 and downstream of each first filter element 221. The filter drive 270 is connected to the filter shaft 260 in a transmission manner.

[0081] Understandably, the filter shaft 260 can further shear and homogenize the slurry after multi-stage filtration during rotation, effectively breaking up any remaining micro-agglomerates to improve the dispersion stability and uniformity of the slurry.

[0082] In the embodiments of this application, the filter shaft 260 is a component disposed inside the filter tank 210 and located downstream of each of the first filter elements 221. The filter shaft 260 may be equipped with helical blades, serrated agitators, or other forms of dispersing elements. In addition, the position of the filter shaft 260 close to the bottom of the filter tank 210 helps to promote sufficient flow and uniform distribution of the slurry before discharge.

[0083] In the embodiments of this application, the filter drive 270 is a component connected to the filter shaft 260 and used to drive the filter shaft 260 to rotate. The filter drive 270 can be a variable frequency motor or a servo motor to flexibly adjust the speed according to the slurry viscosity and process requirements.

[0084] The above settings allow for further shearing and homogenization of the slurry after multi-stage filtration, which helps promote sufficient flow and uniform distribution of the slurry before discharge, thus improving the consistency of the slurry discharge concentration.

[0085] Based on some embodiments in this application, please refer to Figure 1 The slurry processing device also includes a diverter 410, a coating pipeline 420, and a coating mechanism 430. The diverter 410 is located at the outlet of the filter tank 210. The diverter 410 is connected to the return pipeline 300 and the coating pipeline 420 respectively. The coating mechanism 430 is connected to the coating pipeline 420 and is used to coat the filtered slurry.

[0086] Understandably, the diverter 410 can selectively guide the filtered slurry into the return pipeline 300 or the coating pipeline 420 according to process requirements, realizing the slurry recycling or direct entry into the coating process. When the slurry does not meet the coating requirements, the slurry is returned to the stirring mechanism 100 through the return pipeline 300 for re-stirring and filtration; when the slurry meets the coating requirements, the slurry is transported to the coating mechanism 430 through the coating pipeline 420 for subsequent operations.

[0087] In the embodiments of this application, the diverter 410 is a component located at the outlet of the filter tank 210 and connected to the return pipeline 300 and the coating pipeline 420 respectively. The diverter 410 can use a three-way valve, a proportional regulating valve, or other flow path switching device to achieve precise control of the slurry flow direction. The internal flow channel design of the diverter 410 should have a smooth transition to reduce flow resistance and avoid slurry retention. The material of the diverter 410 is usually selected as corrosion-resistant and easy-to-clean stainless steel or polymer composite material. In addition, a second screw pump 421 can be installed on the coating pipeline 420 to provide stable slurry delivery power; a third screw pump 301 can also be installed on the return pipeline 300 to provide stable slurry delivery power.

[0088] In the embodiments of this application, the coating mechanism 430 is connected to the coating pipeline 420 and is used to coat the filtered slurry. The coating mechanism 430 can adopt different forms such as slit type, doctor blade type or roller coating type to adapt to different slurry characteristics and coating accuracy requirements. In addition, a sealing structure can be provided between the coating mechanism 430 and the coating pipeline 420 to ensure the cleanliness and continuity of the entire coating process.

[0089] The above settings enable intelligent diversion of slurry based on its quality status after filtration, ensuring the coating process meets the slurry quality requirements while reducing the probability of resource waste and product defects caused by unqualified slurry directly entering subsequent processes.

[0090] Based on some embodiments in this application, please refer to Figure 1 The slurry processing device also includes a first flow detection element 500 and a second flow detection element 600. The first flow detection element 500 is located in the coating pipeline 420, and the second flow detection element 600 is located in the return pipeline 300.

[0091] It should be noted that the first flow detection element 500 and the second flow detection element 600 can monitor the flow status of the slurry in their respective pipelines in real time and feed the flow data back to the controller so that the system can dynamically adjust the flow ratio or determine whether the slurry meets the coating conditions.

[0092] In the embodiments of this application, a first flow detection element 500 is disposed in the coating pipeline 420 and used to detect the flow rate of the coating pipeline 420. The first flow detection element 500 can be an electromagnetic flow meter, an ultrasonic flow meter, or a mass flow meter, etc. The specific selection needs to be determined comprehensively based on the conductivity, viscosity, and measurement accuracy requirements of the slurry. In addition, the first flow detection element 500 can be linked with the coating mechanism 430. When an abnormal fluctuation in the flow rate of the return pipeline 300 is detected, the system can automatically suspend the coating operation and trigger an alarm, reducing the probability of coating defects caused by uneven material supply.

[0093] In the embodiments of this application, the second flow detection element 600 is disposed in the return pipeline 300 and used to detect the flow rate of the return pipeline 300. The second flow detection element 600 may be the same as or different from the first flow detection element 500, and the selection is made according to the specific requirements of the return operating conditions. The data collected by the second flow detection element 600 is not only used to determine whether the return flow is abnormal, but can also be combined with the data of the first flow detection element 500 to calculate the overall flow balance of the system, and assist in judging the filtration efficiency and whether there is a risk of pipeline blockage.

[0094] With the above settings, the flow rate in each pipeline can be monitored in real time, and the flow state of the slurry can be judged based on the flow rate, thereby providing accurate feedback for the system and facilitating closed-loop control of the slurry processing process.

[0095] Based on some embodiments in this application, please refer to Figure 1 The slurry processing device also includes a cleaning mechanism 700, which is located outside the filter tank 210 and is used to clean the first filter element 221.

[0096] In the embodiments of this application, the cleaning mechanism 700 is a component disposed outside the filter tank 210 and used for cleaning the first filter element 221. The cleaning mechanism 700 can perform cleaning in various ways, such as spray cleaning, backwashing, or ultrasonic-assisted cleaning. The cleaning mechanism 700 can also be linked with the control system to automatically start the cleaning program when the pressure of the first filter element 221 exceeds a set threshold, thereby realizing intelligent maintenance of the first filter element 221.

[0097] With the above settings, the cleaning mechanism 700 can effectively remove residual slurry adhering to the first filter element 221, restore filtration performance, and maintain the continuity and stability of the slurry processing process.

[0098] Based on some embodiments in this application, please refer to Figure 1 The cleaning mechanism 700 includes a cleaning tank 710, a backwash cleaning component 720, and an ultrasonic cleaning component 730. The ultrasonic cleaning component 730 is disposed in the cleaning tank 710 and is used for ultrasonic cleaning of the first filter element 221. The backwash cleaning component 720 is used to backwash the first filter element 221.

[0099] It should be noted that during the filtration process of the slurry, a filter cake layer will form on the filter assembly 220. As the thickness of the filter cake layer gradually increases, the pressure of the filter assembly 220 will gradually increase. When the pressure of the filter assembly 220 reaches a set threshold, the pressure relief assembly 230 can be opened to release the pressure. At this time, the backwash cleaning component 720 can be used to backwash the first filter element 221 to remove the filter cake layer and restore permeability. At the same time, the ultrasonic cleaning component 730 generates a cavitation effect in the cleaning tank 710 through high-frequency vibration, which further breaks down the stubborn particles attached to the surface and pores of the first filter element 221.

[0100] In the embodiments of this application, the backwash cleaning component 720 is a component used to backwash the first filter element 221. The backwash cleaning component 720 can be connected to the cleaning tank 710 or an external liquid supply device. The backwash cleaning component 720 can output cleaning fluid and apply a fluid pressure to the first filter element 221 in the opposite direction to normal filtration, using the cleaning fluid to flush out particulate impurities clogging the mesh. Optionally, the cleaning fluid can be deionized water, organic solvents, or a special cleaning fluid customized according to the slurry composition to effectively dissolve or remove residues without damaging the filter structure.

[0101] In the embodiments of this application, the ultrasonic cleaning component 730 is a component disposed within the cleaning tank 710 and used for ultrasonic cleaning of the first filter element 221. The ultrasonic cleaning component 730 utilizes high-frequency vibration to generate a cavitation effect in the cleaning fluid, effectively removing stubborn residues adhering to the surface and pores of the filter screen. Optionally, the ultrasonic cleaning component 730 is an ultrasonic transducer.

[0102] In the embodiments of this application, the backwash cleaning component 720 and the ultrasonic cleaning component 730 can operate independently or in conjunction, flexibly selecting the cleaning method according to the degree of clogging of the first filter element 221 and the characteristics of the slurry. For example, for mild clogging of the first filter element 221, only the backwash cleaning component 720 can be activated for rapid rinsing; while for high-viscosity slurry residue or dense filter cake formed after long-term operation, both the ultrasonic cleaning component 730 and the backwash cleaning component 720 can be activated simultaneously to achieve deep cleaning through the combined effect of mechanical scouring and cavitation.

[0103] With the above settings, the cleaning method can be flexibly selected according to the degree of clogging of the first filter element 221 and the characteristics of the slurry, effectively restoring the permeability of the first filter element 221 and reducing the risk of affecting the continuity of slurry processing due to filter clogging.

[0104] Based on some embodiments in this application, please refer to Figure 1The mixing mechanism 100 includes a mixing tank 110, a mixing component 120 and a dispersing component 130. The mixing component 120 is rotatably disposed in the middle of the mixing tank 110 and is used to mix the slurry. The dispersing component 130 is rotatably disposed inside the mixing tank 110 and is distributed at intervals with the mixing component 120.

[0105] It should be noted that the dispersion component 130 and the stirring component 120 are arranged at intervals in space. The stirring component 120 mainly focuses on the macroscopic mixing of the slurry, that is, to fully integrate the components of the slurry and maintain circumferential flow; while the dispersion component 130 focuses on the microscopic particle dispersion, that is, to break up agglomerates by the strong shear force generated by high-speed rotation, so as to improve the rheological properties and stability of the slurry.

[0106] In the embodiments of this application, the mixing tank 110 is a component used to contain slurry and provide a space for the mixing assembly 120 and the dispersing assembly 130. The bottom of the mixing tank 110 may also be provided with a discharge port, which is connected to the discharge pipeline 240. In addition, the top of the mixing tank 110 may also be provided with a feeding port and a venting port. The feeding port is used to add raw materials or cleaning liquid, and the venting port is used to balance the pressure inside the tank and prevent the accumulation of volatile gases.

[0107] In the embodiments of this application, the stirring assembly 120 is a component rotatably disposed in the middle of the mixing tank 110 and used for stirring the slurry. The stirring assembly 120 can adopt various structural forms. For example, the stirring assembly 120 includes a stirring drive 121, a stirring shaft 122, and stirring blades 123. The stirring drive 121 is connected to the stirring shaft 122 and is used to drive the stirring shaft 122 to rotate. The stirring blades 123 are fixed on the stirring shaft 122 and rotate synchronously with the stirring shaft 122. The shape of the stirring blades 123 can be paddle type, anchor type, or turbine type to adapt to the mixing requirements of slurries with different viscosities. Optionally, the stirring drive 121 is a motor, and its speed can be dynamically adjusted according to the viscosity of the slurry and the mixing stage to achieve efficient and low-energy stirring of the slurry.

[0108] In the embodiments of this application, the dispersion component 130 is a component rotatably disposed within the mixing tank 110 and spaced apart from the mixing component 120. The dispersion component 130 can adopt various structural forms. For example, the dispersion component 130 includes a dispersion drive 131, a dispersion shaft 132, and dispersion blades 133. The dispersion drive 131 is connected to the dispersion shaft 132 and is used to drive the dispersion shaft 132 to rotate. The dispersion blades 133 are fixed on the dispersion shaft 132 and rotate synchronously with the dispersion shaft 132. The shape of the dispersion blades 133 can be paddle-type, anchor-type, or turbine-type to adapt to the mixing requirements of slurries with different viscosities. Optionally, the dispersion drive 131 is a motor, and its speed can be dynamically adjusted according to the slurry viscosity and mixing stage to achieve efficient and low-energy dispersion of the slurry. The dispersion component 130 and the mixing component 120 are arranged radially offset within the mixing tank 110 so that the hydrodynamic characteristics of their respective functional areas are independently controllable, further enhancing the overall processing effect.

[0109] With the above configuration, the mixing component 120 can fully integrate the components of the slurry and maintain circumferential flow, while the dispersing component 130 breaks up the agglomerates through the strong shear force generated by high-speed rotation, which significantly improves the uniformity and stability of the slurry and reduces the probability of particle agglomeration and sedimentation in the slurry.

[0110] Based on some embodiments in this application, please refer to Figure 1 The rotational speed of the dispersing component 130 is greater than that of the stirring component 120.

[0111] In the embodiments of this application, the high rotational speed of the dispersing component 130 generates a stronger shear force field, effectively breaking down micron-sized agglomerates formed in the slurry due to van der Waals forces or electrostatic interactions, thereby improving the dispersion uniformity of the slurry system. The stirring component 120 maintains a lower rotational speed to avoid introducing excessive air bubbles or causing unnecessary energy loss. The differentiated configuration of the two components in terms of rotational speed achieves synergistic optimization of macroscopic mixing and microscopic dispersion. The rotational speeds of the dispersing component 130 and the stirring component 120 can be dynamically adjusted according to different slurry characteristics. For example, when processing slurries with high solids content or high viscosity, the rotational speed of the dispersing component 130 can be appropriately increased to enhance the shearing effect, while maintaining the stirring component 120 at the minimum effective rotational speed required for stable mixing, thereby improving the dispersion quality while taking into account energy consumption and process stability.

[0112] By implementing the above settings, the overall energy consumption is reduced while improving the dispersion effect, the risk of coating defects caused by particle agglomeration or uneven distribution is reduced, and the stability and coating uniformity of the slurry are significantly improved.

[0113] Please refer to Figure 1 One embodiment of the battery production system includes the slurry processing device described above.

[0114] It should be noted that the battery production system also includes components such as roller presses and slitting machines. These devices are connected sequentially according to the process flow to form a complete battery manufacturing chain. Among them, the slurry processing unit, as a key link between the slurry preparation and coating processes, provides a highly uniform and stable material supply for the next process.

[0115] The aforementioned battery production system, through the reflux pipeline 300, allows the slurry filtered by the filter assembly 220 to flow back to the stirring mechanism 100 for re-stirring and re-filtration, thereby improving the dispersion uniformity and purity of the slurry. Furthermore, when the pressure of the filter assembly 220 reaches a set threshold, the pressure relief assembly 230 can open and release the pressure, enabling the pressure relief assembly 230 to perform subsequent filtration normally. This reduces the probability of equipment damage or decreased filtration efficiency due to excessive pressure, thus greatly improving the filtration efficiency and effect of the slurry processing device.

[0116] According to some embodiments in this application, see Figures 1 to 5 In one embodiment, the slurry processing apparatus includes a stirring mechanism 100, a filtering mechanism 200, a return pipeline 300, a flow divider 410, a coating pipeline 420, a coating mechanism 430, a first flow detection element 500, a second flow detection element 600, and a cleaning mechanism 700. The stirring mechanism 100 is used to receive and disperse the slurry. The filtering mechanism 200 is located downstream of the stirring mechanism 100 and is used to filter the slurry. The return pipeline 300 is used to return the slurry filtered by the filtering mechanism 200 to the stirring mechanism 100. The flow divider 410 is located at the outlet of the filter tank 210 and is connected to the return pipeline 300 and the coating pipeline 420, respectively. The coating mechanism 430 is connected to the coating pipeline 420 and is used to coat the filtered slurry. The first flow detection element 500 is disposed in the coating pipeline 420 and is used to detect the flow rate of the coating pipeline 420. The second flow detection element 600 is disposed in the return pipeline 300 and is used to detect the flow rate of the return pipeline 300. The stirring mechanism 100 includes a stirring tank 110, a stirring assembly 120, and a dispersing assembly 130. The stirring assembly 120 is rotatably disposed in the middle of the stirring tank 110 and is used to stir the slurry. The dispersing assembly 130 is rotatably disposed inside the stirring tank 110 and is distributed at intervals with the stirring assembly 120. The dispersing assembly 130 is used to disperse the slurry. The rotational speed of the dispersing assembly 130 is greater than that of the stirring assembly 120.

[0117] The filtration mechanism 200 includes a filter tank 210, a filter assembly 220, a pressure relief assembly 230, a discharge pipe 240, a second filter element 250, a filter shaft 260, and a filter drive 270. The filter assembly 220 is located inside the filter tank 210 and is used to filter the slurry. The filter assembly 220 includes three first filter elements 221: the uppermost first filter element 221 has a mesh size of 100 mesh, the middle first filter element 221 has a mesh size of 150 mesh, and the lowermost first filter element 221 has a mesh size of 200 mesh. Each first filter element 221 is provided with at least one pressure relief assembly 230 and at least one pressure detection element 222. The pressure detection element 222 is used to detect the pressure of the first filter element 221. The controller is configured to activate the corresponding pressure relief assembly 230 when the pressure of the first filter element 221 reaches a set threshold. The discharge pipe 240 connects the stirring mechanism 100 and the filtering mechanism 200. A second filter element 250 is disposed in the discharge pipe 240, and / or the second filter element 250 is disposed within the filter tank 210 and located upstream of each first filter element 221. A filter shaft 260 is disposed within the filter tank 210 and located downstream of each first filter element 221. A filter drive 270 is connected to the filter shaft 260 and is used to drive the filter shaft 260 to rotate. The cleaning mechanism 700 includes a cleaning tank 710, a backwash cleaning component 720, and an ultrasonic cleaning component 730. The ultrasonic cleaning component 730 is disposed within the cleaning tank 710 and is used for ultrasonically cleaning the first filter elements 221. The backwash cleaning component 720 is used to backwash the first filter elements 221.

[0118] According to some embodiments in this application, see Figures 1 to 5 One embodiment of the battery production system includes the slurry processing device described above.

[0119] 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 slurry processing apparatus, characterized by, include: A stirring mechanism (100) is used to receive and disperse the slurry; A filtration mechanism (200) is located downstream of the stirring mechanism (100) and is used to filter the slurry; A return pipeline (300) is used to return the slurry filtered by the filter mechanism (200) to the stirring mechanism (100). The filtration mechanism (200) includes a filter tank (210), a filter assembly (220), and a pressure relief assembly (230). The filter assembly (220) is disposed in the filter tank (210) and is used to filter the slurry. The pressure relief assembly (230) is disposed in the filter tank (210) and is used to release pressure when the pressure of the filter assembly (220) reaches a set threshold. The filter assembly (220) includes at least two first filter elements (221), all of which are spaced apart from top to bottom. Each first filter element (221) is provided with at least one pressure relief assembly (230). The pressure relief assembly (230) is configured to open when the pressure of the corresponding first filter element (221) reaches a set threshold, so that the slurry on the first filter element (221) falls onto the next first filter element (221); The pressure relief assembly (230) includes a fixing plate (231), a baffle (232) and a pressure relief component (233). The baffle (232) is connected to the first filter element (221), and the fixing plate (231) is connected to the filter tank (210). The pressure relief component (233) is disposed between the fixed plate (231) and the baffle (232), and the pressure relief component (233) can be flipped relative to the fixed plate (231) to realize the opening and closing of the pressure relief assembly (230).

2. The slurry processing apparatus of claim 1, wherein, The slurry processing device further includes a controller, and the filter assembly (220) further includes a pressure detection element (222) electrically connected to the controller, and each of the first filter elements (221) is provided with at least one pressure detection element (222). The pressure detection element (222) is used to detect the pressure of the first filter element (221), and the controller is configured to activate the corresponding pressure relief component (230) when the pressure of the first filter element (221) reaches a set threshold.

3. The slurry processing apparatus of claim 1, wherein, Each of the first filter elements (221) has at least one pressure relief assembly (230) on each side along its own length direction. And / or, each of the first filter elements (221) is provided with at least one of the pressure relief components (230) on both sides along its own width direction.

4. The slurry processing apparatus of claim 1, wherein, The first filter element (221) is a filter screen, and the mesh count of each filter screen gradually increases from top to bottom.

5. The slurry processing apparatus of claim 4, wherein, The filter assembly (220) includes three first filter elements (221), the uppermost first filter element (221) has a mesh size of 100 mesh, the middle first filter element (221) has a mesh size of 150 mesh, and the lowermost first filter element (221) has a mesh size of 200 mesh.

6. The slurry processing apparatus of claim 1, wherein, The filtration mechanism (200) further includes a discharge pipe (240) and a second filter element (250). The discharge pipe (240) is connected between the stirring mechanism (100) and the filtration mechanism (200). The mesh size of the second filter element (250) is smaller than that of each of the first filter elements (221). The second filter element (250) is disposed in the discharge pipe (240), and / or the second filter element (250) is disposed in the filter tank (210) and located upstream of each of the first filter elements (221).

7. The slurry processing apparatus of claim 1, wherein, The filtration mechanism (200) further includes a filter shaft (260) and a filter drive (270). The filter shaft (260) is located inside the filter tank (210) and downstream of each of the first filter elements (221). The filter drive (270) is connected to the filter shaft (260) in a driving connection.

8. The slurry processing apparatus of claim 1, wherein, The slurry processing device further includes a diverter (410), a coating pipeline (420), and a coating mechanism (430). The diverter (410) is located at the outlet of the filter tank (210). The diverter (410) is connected to the return pipeline (300) and the coating pipeline (420) respectively. The coating mechanism (430) is connected to the coating pipeline (420) and is used to coat the filtered slurry.

9. The slurry processing apparatus of claim 8, wherein, The slurry processing device further includes a first flow detection element (500) and a second flow detection element (600), the first flow detection element (500) being disposed in the coating pipeline (420) and the second flow detection element (600) being disposed in the return pipeline (300).

10. The slurry processing apparatus of claim 1, wherein, The slurry processing device further includes a cleaning mechanism (700), which is located outside the filter tank (210) and is used to clean the first filter element (221).

11. The slurry processing apparatus of claim 10, wherein, The cleaning mechanism (700) includes a cleaning tank (710), a backwash cleaning component (720), and an ultrasonic cleaning component (730). The ultrasonic cleaning component (730) is disposed in the cleaning tank (710) and is used for ultrasonic cleaning of the first filter element (221). The backwash cleaning component (720) is used to backwash the first filter element (221).

12. The slurry processing apparatus of claim 1, wherein, The stirring mechanism (100) includes a stirring tank (110), a stirring component (120), and a dispersing component (130). The stirring component (120) is rotatably disposed in the middle of the stirring tank (110) and is used to stir the slurry. The dispersing component (130) is rotatably disposed inside the stirring tank (110) and is distributed at intervals with the stirring component (120).

13. The slurry processing apparatus of claim 12, wherein, The rotational speed of the dispersing component (130) is greater than that of the stirring component (120).

14. A battery production system characterized by comprising: Includes the slurry processing apparatus as described in any one of claims 1-13.

Images