Filtering device, atomization drying equipment and production system of battery active material

Abstract

The utility model provides a filtering device, atomization drying equipment and a battery active material production system.The filtering device comprises a filtering shell, a filtering element and a pressure sensor, the filtering shell comprises a containing cavity, and the filtering element is arranged in the containing cavity and divides the containing cavity into a first cavity and a second cavity; the first cavity is provided with a feeding port used for injecting slurry, the second cavity is provided with a discharging port used for being connected with an inlet of an atomizer, the filtering element is provided with a filtering channel, the slurry is configured to enter the second cavity from the first cavity through the filtering channel, and the pressure sensor is arranged on the filtering shell and configured to detect the pressure value in the first cavity. According to the filtering device, slurry can be filtered, the atomization drying efficiency of the atomizer is improved, meanwhile, the use state of the filtering device can be judged according to the pressure value, and the reliability of the filtering device is improved.

Description

Technical Field

[0001] This application relates to the technical field of battery production equipment, and particularly relates to a filtering device, an atomization drying device, and a production system for battery active materials. Background Art

[0002] The production process of battery active materials generally uses chemical means to form a slurry through wet batching, and then forms a powdery material through atomization drying. Qualified active materials are obtained by processing the powdery material.

[0003] As the core component of the atomization drying device, the performance of the atomizer directly affects the effect of atomization drying. However, in practical applications, the atomizer often becomes blocked due to impurities and particles in the slurry, resulting in a decrease in atomization drying efficiency and even affecting product quality. Therefore, how to improve the atomization drying efficiency has become an urgent problem to be solved. Summary of the Utility Model

[0004] In view of the above problems, this application provides a filtering device, an atomization drying device, and a production system for battery active materials, which can filter the slurry, improve the atomization drying efficiency of the atomizer, and at the same time can judge the use state of the filtering device according to the pressure value, improving the reliability of the filtering device.

[0005] In a first aspect, this application provides a filtering device for an atomizer. The filtering device includes a filtering housing, a filtering element, and a pressure sensor. The filtering housing includes a receiving cavity. The filtering element is disposed in the receiving cavity and divides the receiving cavity into a first cavity and a second cavity. The first cavity is provided with a feed port for injecting slurry, and the second cavity is provided with a discharge port for connecting to the inlet of the atomizer. The filtering element is provided with a filtering channel, and the slurry is configured to enter the second cavity from the first cavity through the filtering channel. The pressure sensor is disposed on the filtering housing and is configured to detect the pressure value in the first cavity.

[0006] In the embodiments of this application, impurities and particles in the slurry can be filtered by the filtering device, reducing the risk of blockage of the atomizer and improving the atomization drying efficiency. At the same time, through the pressure sensor on the filtering housing, the use state of the filtering device can be judged in real time, so that the filtering device can be maintained in a timely manner accordingly, improving the reliability of the filtering device.

[0007] In some embodiments, the number of pressure sensors is two or more. The two or more pressure sensors are spaced apart on the filtering housing and are all used to detect the pressure value in the first cavity. When the detection result of any pressure sensor is abnormal, comparison can be made through other pressure sensors to form a redundant design, reducing the risk of false alarms. At the same time, the detection error of the pressure value can also be reduced, improving the accuracy and reliability of the detection.

[0008] In some embodiments, the filtering device further includes an alarm, which is connected to the pressure sensor and configured to send an alarm message according to the pressure value, so that the staff can choose whether to stop the filtering device for maintenance according to the on-site working conditions, achieving the purpose of timely maintaining the filtering device.

[0009] In some embodiments, the filtering device further includes a cleaning assembly, which is arranged in the second chamber and configured to spray cleaning liquid from the second chamber side into the filtering channel. A drain valve is arranged in the first chamber, and the drain valve can be opened to discharge the cleaning liquid in the first chamber.

[0010] In the embodiments of the present application, by arranging the cleaning assembly, when the filtering element needs to be maintained, the cleaning liquid can be sprayed from the second chamber side into the filtering channel, and the impurities and particles attached to the first chamber side of the filtering element can be flushed into the first chamber and discharged through the drain valve, thereby realizing the cleaning of the filtering element, improving the filtering effect and service life of the filtering element, and improving the reliability of the filtering device.

[0011] In some embodiments, the filtering device further includes a control module, which is connected to the cleaning assembly and the pressure sensor. The control module is configured to control the cleaning assembly to spray cleaning liquid into the filtering channel when the pressure value collected by the pressure sensor is greater than the threshold value, improving the working efficiency, reducing the working intensity of the operator and the equipment maintenance cost.

[0012] In some embodiments, there is a height difference between the first chamber and the second chamber. The first chamber is at least partially located below the second chamber and the drain valve is arranged at the bottom end of the first chamber, so that after cleaning, the impurities and particles attached to the first chamber side of the filtering element can flow to the bottom end of the first chamber along with the cleaning liquid and be discharged and collected through the drain valve, reducing the residual cleaning liquid in the accommodating chamber after cleaning, and improving the cleaning effect and the reliability of the cleaning process.

[0013] In some embodiments, at least part of the filtering element protrudes towards the first chamber, and the filtering channel is arranged at the protruding end of the filtering element. The cleaning assembly includes a cleaning pipe body and a nozzle opened on the cleaning pipe body. The cleaning pipe body at least partially extends to the protruding end of the filtering element and sprays cleaning liquid into the filtering channel through the nozzle.

[0014] In some embodiments, the filtering housing includes a filtering cylinder and a cover body. The filtering cylinder encloses to form an accommodating chamber, at least one end of the accommodating chamber has an opening, the cover body is detachably connected to the filtering cylinder and covers the opening, and the filtering element is detachably connected to the filtering housing and can be taken out from the opening, so that when the filtering element needs to be maintained, the filtering element can be removed from the filtering housing and the cleaning or replacement of the filtering element can be realized externally, improving the reliability of the filtering device.

[0015] In some embodiments, the filtration housing further includes a feed pipe that communicates with the feed inlet of the first chamber. The pressure sensor is disposed in the feed pipe. The filtration device can be connected to the slurry storage tank through the feed pipe, improving the reliability of the connection. At the same time, it is also more convenient to set the pressure sensor, making it more aesthetically pleasing and convenient.

[0016] In some embodiments, the aperture diameter of the filtration channel is 1 mm to 2 mm, so that the aperture diameter of the filtration channel is adapted to the filtration diameter of the slurry, achieving effective interception of impurities and particles and reducing the risk of large particles entering the atomizer.

[0017] In a second aspect, an embodiment of the present application provides an atomization drying device, including the filtration device of the first aspect and an atomizer. The discharge port of the filtration device communicates with the inlet of the atomizer.

[0018] In a third aspect, an embodiment of the present application provides a production system for battery active materials, including the atomization drying device of the second aspect.

[0019] According to the filtration device of the embodiments of the present application, it includes a filtration housing, a filtration element, and a pressure sensor. The filtration element is disposed in the accommodation cavity of the filtration housing and divides the accommodation cavity into a first chamber and a second chamber. After the slurry is injected into the first chamber, it can filter impurities and particles through the filtration channel and then enter the atomizer through the second chamber, thereby improving the uniformity of the slurry entering the atomizer, reducing the risk of impurities and particles entering the atomizer, and improving the atomization drying efficiency. Moreover, by setting a pressure sensor on the filtration housing, the pressure change in the first chamber during the filtration process can be detected in real time, and the usage status of the filtration device can be judged, so that the filtration device can be maintained in a timely manner based on this, improving the reliability of the filtration device.

[0020] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0022] Figure 1 is a cross-sectional view of the filtration device provided by some embodiments of the present application;

[0023] Figure 2 is a cross-sectional view of the filtration device provided by other embodiments of the present application.

[0024] The reference numerals in the specific embodiments are as follows:

[0025] 10 Filter device;

[0026] 1 Filter housing, 11 Filter cartridge, 12 Cover body, 13 Feed pipe, 14 Discharge pipe, 2 Filter element, 21 Filter channel, 3 Installation interface, 4 Cleaning assembly, 41 Cleaning pipe body, 42 Sprayer head, 43 Connection valve, 5 Drain valve;

[0027] S1 - First chamber; S2 - Second chamber; S21 - First sub - chamber; S22 - Second sub - chamber;

[0028] X Second direction, Z First direction. Specific embodiments

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

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be the ordinary meanings understood by those skilled in the art to which the embodiments of the present application belong.

[0031] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the embodiments of the present application.

[0032] In addition, the technical terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the embodiments of the present application, "a plurality" means more than two, unless otherwise specifically defined.

[0033] In the description of the embodiments of the present application, unless otherwise clearly specified or limited, technical terms such as "installation", "connection", "linkage", and "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0034] In the description of the embodiments of the present application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0035] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely used in electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also constantly increasing.

[0036] A battery generally includes an electrode assembly, and the electrode assembly includes a positive electrode, a negative electrode, and a separator. The positive electrode includes a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and positive electrode active material provided on at least one surface of the positive electrode current collector. The negative electrode includes a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector and negative electrode active material provided on at least one surface of the negative electrode current collector.

[0037] Taking the production system of positive electrode active material as an example, its production process generally uses wet batching and then grinding to form a slurry that meets the process requirements. The slurry can be ternary material, lithium iron phosphate, etc. The prepared slurry is stored in a raw material storage tank, and the slurry is sent into an atomization drying device through a pipeline under the action of a high-pressure pump. The slurry is dispersed into very small droplets by an atomizer in the atomization drying device, and the moisture in the droplets is carried away under the action of hot air injected at the bottom of the atomization drying device. The droplets are converted into powdery materials and deposited. After collecting the powdery materials and performing processing, qualified positive electrode active material can be obtained.

[0038] In existing atomization drying equipment, during the actual production process, the atomizer often gets blocked due to impurities, particles, etc. in the slurry, resulting in a decrease in atomization drying efficiency and affecting product quality.

[0039] Based on the above considerations, in order to improve the atomization drying efficiency, the embodiments of the present application provide a filtering device. By arranging the filtering device at the front end of the atomizer, the slurry entering the atomizer can be filtered, reducing the risk of impurities and particles entering the atomizer and improving the atomization drying efficiency. To facilitate the understanding of the present application, the following will describe in detail the filtering device, atomization drying equipment and production system of battery active materials in the embodiments of the present application in conjunction with the attached Figure 1 and Figure 2 drawings.

[0040] Please refer to Figure 1 , Figure 1 which shows a schematic structural diagram of a filtering device 10 provided in some embodiments of the present application.

[0041] The present application provides a filtering device 10 for an atomizer. The filtering device 10 includes a filtering housing 1, a filtering element 2 and a pressure sensor. The filtering housing 1 includes a receiving cavity. The filtering element 2 is arranged in the receiving cavity and divides the receiving cavity into a first cavity S1 and a second cavity S2. The first cavity S1 is provided with a feed port for injecting slurry, and the second cavity S2 is provided with a discharge port for connecting to the inlet of the atomizer. The filtering element 2 is provided with a filtering channel 21. The slurry is configured to enter the second cavity S2 from the first cavity S1 through the filtering channel 21. The pressure sensor is arranged on the filtering housing 1 and is configured to detect the pressure value in the first cavity S1.

[0042] In the embodiments of the present application, by arranging the filtering device 10 at the front end of the atomizer, after the slurry is injected into the first cavity S1 of the filtering device 10, it can filter impurities and particles through the filtering channel 21 and then enter the atomizer through the second cavity S2, thereby improving the uniformity of the slurry entering the atomizer, reducing the risk of impurities and particles entering the atomizer, and improving the atomization drying efficiency. Moreover, by arranging a pressure sensor on the filtering housing 1, the pressure change in the first cavity S1 during the filtering process can be detected in real time, and the usage state of the filtering device 10 can be judged, so that the filtering device 10 can be maintained in time accordingly, improving the reliability of the filtering device 10.

[0043] It can be understood that since the first chamber S1 is provided with a feed port for injecting slurry, impurities and particles will be blocked on the side of the first chamber S1 through the filtering channel 21. When too many impurities and particles accumulate, resulting in a decrease in the filtering capacity of the filtering element 2, the pressure in the first chamber S1 will instantaneously increase. Therefore, by detecting the pressure value of the first chamber S1 in real time with a pressure sensor, the usage status of the filtering device 10 can be visually judged, so that the filtering device 10 can be maintained in a timely manner before it fails, improving the filtering effect.

[0044] Compared with the method of regularly detecting the filtering device 10, by arranging a pressure sensor in the first chamber S1, the usage status of the filtering device 10 can be detected in real time, and problems such as downtime or major repairs of the filtering device 10 due to insufficient maintenance will not occur, nor will resources be wasted due to overly frequent maintenance. Thus, it can better adapt to the usage conditions of the filtering device 10, maintain the filtering device 10 in a timely manner, and improve the continuity and stability of the atomization drying process.

[0045] Optionally, an installation interface 3 can be provided on the filtering housing 1, and the pressure sensor is installed on the installation interface 3 to facilitate the installation and detection of the pressure sensor.

[0046] In some alternative embodiments, the number of pressure sensors is two or more, and the two or more pressure sensors are spaced apart on the filtering housing 1 and are all used to detect the pressure value in the first chamber S1.

[0047] The number of pressure sensors being two or more means that the number of pressure sensors can be two, or three, four or even more. By arranging two or more pressure sensors, when the detection result of any pressure sensor is abnormal, comparison can be made through other pressure sensors to form a redundant design, reducing the risk of false alarms. At the same time, the detection error of the pressure value can also be reduced, improving the accuracy and reliability of the detection.

[0048] In some alternative embodiments, the filtering device 10 further includes an alarm, and the alarm is connected to the pressure sensor. The alarm is configured to send an alarm message according to the pressure value.

[0049] By arranging the alarm, when the pressure value of the first chamber S1 detected by the pressure sensor is higher than the first threshold, an alarm message can be sent through the alarm to give a warning to the staff, so that the staff can choose whether to stop the filtering device 10 for operation and maintenance according to the on-site working conditions, achieving the purpose of maintaining the filtering device 10 in a timely manner.

[0050] Optionally, the alarm can be an audible and visual alarm.

[0051] Please refer to Figure 2 , Figure 2The cross-sectional view of the filtering device 10 provided by some other embodiments of the present application is shown.

[0052] To realize the operation and maintenance of the filtering device 10, in some optional embodiments, the filtering device 10 further includes a cleaning component 4. The cleaning component 4 is arranged in the second chamber S2 and is configured to spray cleaning liquid from the side of the second chamber S2 to the filtering element 2. A drain valve 5 is arranged in the first chamber S1, and the drain valve 5 can be opened to discharge the cleaning liquid in the first chamber S1.

[0053] By arranging the cleaning component 4, when it is necessary to maintain the filtering element 2, the cleaning liquid can be sprayed from the side of the second chamber S2 to the filtering channel 21, and the impurities and particles attached to the first chamber S1 side of the filtering element 2 can be flushed into the first chamber S1 and discharged through the drain valve 5, so as to realize the cleaning of the filtering element 2, improve the filtering effect and service life of the filtering element 2, and improve the reliability of the filtering device 10.

[0054] Wherein, the drain valve 5 can include an open state and a closed state. When the cleaning component 4 is started, the drain valve 5 can be switched to the open state, so that the cleaning liquid can be discharged in time while cleaning. After the cleaning is completed, the drain valve 5 can be switched to the closed state to meet the filtering requirements of the filtering device 10.

[0055] It can be understood that in practical applications, the filtering element 2 can be cleaned by manually stopping the machine and controlling the start of the cleaning component 4, or the filtering element 2 can be cleaned by automatically controlling the start of the cleaning component 4.

[0056] In some optional embodiments, the filtering device 10 further includes a control module. The control module is connected to the cleaning component 4 and a pressure sensor, and is configured to control the cleaning component 4 to spray cleaning liquid into the filtering channel 21 when the pressure value collected by the pressure sensor is greater than a second threshold.

[0057] By arranging the control module, the cleaning component 4 can be automatically controlled to spray cleaning liquid into the filtering channel 21 according to the pressure value collected by the pressure sensor, improving the working efficiency, reducing the working intensity of the operator and the equipment maintenance cost.

[0058] Optionally, the first threshold can be equal to the second threshold, or the first threshold can be less than the second threshold. That is, before stopping the machine to clean the filtering element 2, the operator can be warned by an alarm to improve the controllability of the cleaning process.

[0059] Please refer to Figure 2 , to improve the cleaning effect of the cleaning component 4 on the filtering element 2, in some optional embodiments, there is a height difference between the first chamber S1 and the second chamber S2. The first chamber S1 is at least partially located below the second chamber S2 and the drain valve 5 is arranged at the bottom end of the first chamber S1.

[0060] Optionally, the filter housing 1 can be arranged to extend along the first direction Z. The filter element 2 divides the accommodation cavity into a first cavity S1 and a second cavity S2 arranged along the first direction Z. The first direction Z can be set as the height direction. By arranging at least part of the first cavity S1 below the second cavity S2, after cleaning, the impurities and particles attached to the side of the filter element 2 in the first cavity S1 can flow to the bottom end of the first cavity S1 along with the cleaning liquid and be discharged and collected through the drain valve 5, reducing the residual cleaning liquid in the accommodation cavity after cleaning, and improving the cleaning effect and the reliability of the cleaning process.

[0061] For the convenience of description, hereinafter, the case where the filter housing 1 extends along the first direction Z and the first cavity S1 and the second cavity S2 are arranged along the first direction Z will be taken as an example for illustration.

[0062] Optionally, the first cavity S1 is provided with a diversion part, which is located on the inner wall surface of the filter housing 1 and at least partially extends to the position where the drain valve 5 is located, so that the flushed impurities and particles can flow to the drain valve 5 at the bottom end of the first cavity S1 under the guidance of the diversion part, further reducing the residual cleaning liquid in the accommodation cavity after cleaning and improving the cleaning effect.

[0063] Optionally, the diversion part can be set as an inclined surface. For example, the first cavity S1 can be set as a funnel-shaped structure, and the drain valve 5 is arranged at the lower port of the funnel-shaped structure to achieve the diversion and drainage of the cleaning liquid.

[0064] In some optional embodiments, the filter element 2 at least partially protrudes towards the first cavity S1 along the first direction Z. The filter channel 21 is arranged at the protruding end of the filter element 2. The cleaning assembly 4 includes a cleaning pipe body 41 and a spray head 42 opened on the cleaning pipe body 41. One end of the cleaning pipe body 41 is connected to a connection valve 43 to inject high-pressure cleaning liquid through the connection valve 43, and the other end at least partially extends to the protruding end of the filter element 2, and sprays the cleaning liquid to the filter channel 21 through the spray head 42 on the cleaning pipe body 41.

[0065] By arranging the filter element 2 to at least partially protrude towards the first cavity S1 along the first direction Z, the area of the filter element 2 can be increased under the same accommodation space, which is more convenient for improving the filtering effect.

[0066] It can be understood that when the filter element 2 at least partially protrudes towards the first cavity S1 along the first direction Z, the second cavity S2 can include a first sub-cavity S21 and a second sub-cavity S22 that are connected and communicated. The first sub-cavity S21 is located above the first cavity S1 along the first direction Z, and the second sub-cavity S22 protrudes towards the first cavity S1 along the first direction Z.

[0067] At this time, the cleaning tube body 41 of the cleaning component 4 can at least partially extend into the second sub-chamber S22, and spray cleaning liquid from the second sub-chamber S22 to the filter element 2 through the nozzle 42 towards the filter channel 21, so as to be able to perform high-pressure flushing on the filter channel 21 specifically, and flush the impurities and particles attached to the filter element 2 clean.

[0068] Optionally, the filter element 2 is arranged in the middle of the accommodation chamber, that is, the first chamber S1 has an annular structure, the second sub-chamber S22 is arranged in the middle of the first chamber S1, and the nozzles 42 can be evenly distributed circumferentially on the cleaning tube body 41, so as to form an annular spray to perform high-pressure flushing on the filter element 2, improving the cleaning efficiency and cleaning effect.

[0069] In some optional embodiments, the aperture of the filter channel 21 is 1 mm to 2 mm.

[0070] Optionally, the filter element 2 can be set as a filter net, for example, it can be a stainless steel net. The filter channel 21 is the mesh of the filter net, and the aperture of the filter channel 21 is adapted to the filtration diameter of the slurry. That is, by making the aperture of the filter channel 21 greater than or equal to 1 mm, the amount of impurities and particles attached to the filter element 2 can be reduced, the number of cleaning or maintenance times can be reduced, and resources can be saved. At the same time, by making the aperture of the filter channel 21 less than or equal to 2 mm, the effective interception of impurities and particles can be realized, the risk of large particles entering the atomizer can be reduced, so that it can be better adapted to the preparation slurry of the battery active material, and the filtration effect of the slurry can be improved.

[0071] Please refer to Figure 1 and Figure 2 , in addition to being able to maintain the filtering device 10 through the cleaning component 4, in some optional embodiments, the filter housing 1 includes a filter cylinder 11 and a cover body 12. The filter cylinder 11 encloses to form an accommodation chamber and has an opening at the end along the first direction Z. The cover body 12 is detachably connected to the filter cylinder 11 and covers the opening. The filter element 2 is detachably connected to the filter housing 1 and can be taken out from the opening.

[0072] By setting the filter housing 1 separately into the filter cylinder 11 and the cover body 12, and detachably connecting the filter element 2 to the filter housing 1, when the filter element 2 needs to be maintained, the filter element 2 can be removed from the filter housing 1 and the cleaning or replacement of the filter element 2 can be realized externally, improving the reliability of the filtering device 10.

[0073] It can be understood that for the filtering device 10, the maintenance of the filtering element 2 can be achieved by only arranging the cleaning component 4 in the accommodating cavity, or the filtering element 2 can be detachably connected to the filtering housing 1 to achieve the maintenance of the filtering element 2. Of course, the filtering element 2 can also be detachably connected to the filtering housing 1 while arranging the cleaning component 4, so that the filtering element 2 can be cleaned by the cleaning component 4 in the initial stage of use. When the filtering element 2 reaches its expected service life, or the time interval between two adjacent cleanings is less than the preset value, the filtering element 2 can be removed and replaced, which is more efficient and can also extend the service life of the filtering device 10.

[0074] Optionally, for easy disassembly, a boss is protrudingly arranged on the inner wall of the filtering housing 1 towards the accommodating cavity. A first connection hole is arranged on the boss. The filtering housing 1 is provided with a flange, and the flange and the boss are at least partially overlapped and a second connection hole is arranged corresponding to the first connection hole. The filtering device 10 further includes a connecting piece, and the connecting piece can sequentially pass through the second connection hole and the first connection hole, and detachably connect the filtering element 2 to the filtering housing 1.

[0075] Among them, one end of the filter cartridge 11 in the first direction Z has an opening. One side of the filter cartridge 11 in the first direction Z has an opening. For example, one of the top and bottom of the filter cartridge 11 is provided with an opening, or both sides of the filter cartridge 11 in the first direction Z are provided with openings.

[0076] Optionally, an opening can be arranged at the bottom of the filter cartridge 11. The flange of the filtering housing 1 can be placed on the surface of the boss facing the opening. The connecting piece sequentially passes through the second connection hole and the first connection hole from the opening side, and detachably connects the filtering element 2 to the filtering housing 1. By arranging the opening at the bottom of the filter cartridge 11, on the one hand, the disassembly of the filtering element 2 can be carried out to realize the replacement and operation and maintenance of the filtering element 2. On the other hand, since the drain valve 5 is arranged on the cover body 12 at the bottom, the drain valve 5 area can be cleaned by removing the cover body 12, reducing the risk of impurities or particles remaining in the accommodating cavity after maintenance and improving the reliability.

[0077] Optionally, the connecting piece can be set as a bolt or a screw.

[0078] Optionally, the cover body 12 and the filter cartridge 11 can be connected by any detachable connection method. In addition, a sealing groove can be arranged on the connecting end surface of the cover body 12 and the filter cartridge 11, and a sealing ring is embedded in the sealing groove, so as to improve the sealing performance of the accommodating cavity after the cover body 12 is connected to the filter cartridge 11, reduce the risk of slurry leakage from the connecting gap between the cover body 12 and the filter cartridge 11, and improve the reliability.

[0079] In some alternative embodiments, the filtration housing 1 includes a feed pipe 13. The feed pipe 13 extends along the second direction X and is connected to the feed port of the first chamber S1. The pressure sensor is disposed on the feed pipe 13, and the second direction X intersects the first direction Z.

[0080] By disposing the feed pipe 13 on one side of the filter cartridge 11, the filtration device 10 can be connected to the slurry storage tank through the feed pipe 13, improving the connection reliability. At the same time, it is also more convenient to set the pressure sensor, making it more aesthetic and convenient. When the number of pressure sensors is more than two, the two or more pressure sensors can be spaced along the second direction X on the feed pipe 13 to facilitate the setting of the pressure sensors.

[0081] Optionally, the second direction X can be set as the horizontal direction.

[0082] In some alternative embodiments, the filtration housing 1 further includes a discharge pipe 14. The discharge pipe 14 extends along the second direction X and is connected to the discharge port of the second chamber S2. By disposing the discharge pipe 14 on one side of the filter cartridge 11, the filtration device 10 can be connected to the inlet of the atomizer through the discharge pipe 14, improving the connection reliability.

[0083] Optionally, the feed pipe 13, the discharge pipe 14 and the filter cartridge 11 can be set as an integral structure to improve the sealing effect.

[0084] Please refer to Figure 1 and Figure 2 , taking the filtration device 10 in an embodiment of the present application as an example, to illustrate the specific structure and working process of the filtration device 10.

[0085] The filtration device 10 includes a filtration housing 1, a filtration element 2, a cleaning assembly 4, a drain valve 5 and two pressure sensors. The filtration element 2 is disposed in the accommodation cavity of the filtration housing 1 and divides the accommodation cavity into a first chamber S1 and a second chamber S2 arranged along the first direction Z. The first chamber S1 and the second chamber S2 are connected through the filtration channel 21 on the filtration element 2. The first chamber S1 is provided with a feed port, the second chamber S2 is provided with a discharge port, and the two pressure sensors are used to detect the pressure value of the first chamber S1.

[0086] After the slurry enters the first chamber S1 through the feed port, the liquid material in the slurry with a size smaller than the pore diameter of the filter channel 21 will enter the second chamber S2 through the filter channel 21, while impurities and particles will adhere to the surface of the filter element 2. When the pressure sensor detects that the pressure in the first chamber S1 is greater than the first threshold, an alarm message will be sent through the alarm to prompt the operator. The operator can stop the machine and start the cleaning component 4. The cleaning component 4 includes a cleaning pipe body 41 and a spray head 42 provided on the cleaning pipe body 41. The high-pressure cleaning liquid is sprayed from the second chamber S2 side to the filter channel 21 through the spray head 42 to clean the impurities adhering to the filter element 2, and the flushed impurities are discharged and collected through the drain valve 5. The filter housing 1 includes a filter cylinder 11 enclosing an opening and a cover body 12. The filter element 2 is detachably connected to the filter housing 1. When the filter element 2 reaches the end of its service life and needs to be replaced, the cover body 12 can be opened, and the filter element 2 can be removed and replaced with a new one.

[0087] The embodiment of the present application also provides an atomization drying device, including the filtering device 10 in the above embodiment and an atomizer. The discharge port of the filtering device 10 is communicated with the inlet of the atomizer. After the slurry is injected into the first chamber S1, it can filter impurities and particles through the filter channel 21 and then enter the atomizer through the second chamber S2, thereby improving the uniformity of the slurry entering the atomizer, reducing the risk of impurities and particles entering the atomizer, and improving the atomization drying efficiency.

[0088] In addition, the embodiment of the present application provides a production system for battery active materials, including the atomization drying device in the above embodiment. Therefore, it also has the effects of the atomization drying device in any of the above embodiments, and the same parts are not described in detail here.

[0089] The battery active material can be a positive electrode material or a negative electrode material, and the pore diameter of the filter channel 21 in the corresponding filtering device 10 can be adjusted according to the slurry of the battery active material, as long as the filtering requirements of the slurry can be met.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A filtering device for an atomizer, characterized in that, The filtering device includes: A filtering housing, including a receiving cavity; A filtering element, disposed in the receiving cavity and separating the receiving cavity into a first cavity and a second cavity. The first cavity is provided with a feed port for injecting slurry, and the second cavity is provided with a discharge port for connecting to the inlet of the atomizer. The filtering element is provided with a filtering channel, and the slurry is configured to enter the second cavity from the first cavity through the filtering channel; and A pressure sensor, disposed on the filtering housing and configured to detect the pressure value in the first cavity.

2. The filtering device according to claim 1, characterized in that, The number of the pressure sensors is two or more, and the two or more pressure sensors are spaced apart on the filtering housing and are all used to detect the pressure value in the first cavity.

3. The filtering device according to claim 1, wherein, The filtering device further includes an alarm, which is connected to the pressure sensor, and the alarm is configured to send an alarm message according to the pressure value.

4. The filtering device according to any one of claims 1 to 3, characterized in that The filtering device further includes a cleaning assembly, which is disposed in the second cavity and is configured to spray cleaning liquid from the side of the second cavity into the filtering channel. The first cavity is provided with a drain valve, and the drain valve can be opened to discharge the cleaning liquid in the first cavity.

5. The filtering device according to claim 4, wherein The filtering device further includes a control module, which is connected to the cleaning assembly and the pressure sensor. The control module is configured to control the cleaning assembly to spray cleaning liquid into the filtering channel when the pressure value collected by the pressure sensor is greater than a threshold value.

6. The filtering device according to claim 4, characterized in that, There is a height difference between the first cavity and the second cavity. The first cavity is at least partially located below the second cavity, and the drain valve is disposed at the bottom end of the first cavity.

7. The filtering device according to claim 4, wherein, At least a part of the filtering element protrudes towards the first cavity, and the filtering channel is disposed at the protruding end of the filtering element; The cleaning assembly includes a cleaning pipe body and a spray head opened on the cleaning pipe body. The cleaning pipe body at least partially extends to the protruding end of the filtering element and sprays cleaning liquid into the filtering channel through the spray head.

8. The filtering device according to any one of claims 1 to 3, characterized in that, The filtering housing includes a filtering cylinder and a cover body. The filtering cylinder encloses to form the receiving cavity. At least one end of the receiving cavity has an opening, and the cover body is detachably connected to the filtering cylinder and covers the opening; The filtering element is detachably connected to the filtering housing and can be taken out from the opening.

9. The filtering device according to any one of claims 1 to 3, characterized in that, The filtering housing further includes a feed pipe, which is communicated with the feed port of the first cavity, and the pressure sensor is disposed on the feed pipe.

10. The filtering device according to any one of claims 1 to 3, characterized in that, The aperture of the filtering channel is 1 mm to 2 mm.

11. An atomization drying device, characterized in that, Including the filtering device according to any one of claims 1 to 10 and an atomizer, and the discharge port of the filtering device is communicated with the inlet of the atomizer.

12. A production system for a battery active material, characterized in that, Including the atomization drying device according to claim 11.

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