Screening equipment and screening system for battery negative electrode material

Abstract

The utility model provides screening equipment and a screening system for a battery cathode material. The screening equipment comprises a screening equipment body, and a containing cavity is formed in the screening equipment body; the first screen and the second screen are arranged in the accommodating cavity; the second screen and the first screen are arranged at an interval; the mesh number of the second screen is smaller than that of the first screen, the mesh number range of the first screen is 270-325, and the mesh number range of the second screen is 100-200; the accommodating cavity is sequentially divided into a first inner cavity, a second inner cavity and a third inner cavity by the first screen and the second screen; a feed port; the second discharging port is formed in one side of the screening equipment body and communicates with the second inner cavity. The third discharging port is formed in the side, away from the second discharging port, of the screening equipment body and communicates with the third inner cavity. The screening system comprises the screening equipment, material conveying equipment, weighing equipment, storage equipment and linkage control equipment. After the screen of the screening equipment is damaged, the screening equipment is shut down in time, and it is guaranteed that large-particle materials cannot enter the subsequent process after the screen is damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of screening, in particular to a screening device and a screening system for battery anode materials. Background Art

[0002] In the process of manufacturing lithium-ion battery anode materials, the screening process is an essential step in the finished product preparation process. Its purpose is to screen out large particles in the graphite powder after previous processes such as graphitization and coating carbonization, ensuring that the D v max of the graphite powder entering the subsequent process does not exceed the standard, where D v max is the largest particle of the particle size of the anode material. Typically, the screening device is completed with a screen mesh of a predetermined mesh number. In the actual screening process, the screen mesh may be damaged after being used for a period of time; and the screening device is a sealed system. During the screening process, a large amount of dust will be generated by the graphite powder. Therefore, even if there is an observation window, it is impossible to clearly see the internal situation, let alone determine whether the screen mesh is damaged. Currently, in the industry, it is usually replaced in advance after the screen mesh is used for a predetermined time or a predetermined amount of screened material to avoid raw materials entering the subsequent process without screening due to the damage of the screen mesh, ultimately affecting the quality of the battery anode material. Although the method of early replacement is adopted, there is still a situation where the screen mesh is damaged in advance, and the time point of damage cannot be determined. In this way, the large particle materials from the time of screen mesh damage to the discovery of screen mesh damage have already entered the subsequent process. Therefore, in the actual production process, large particle foreign matters are often found in the product, which will cause significant losses to both battery anode material suppliers and end customers. Summary of the Utility Model

[0003] In order to improve at least some of the above-mentioned disadvantages or deficiencies, the embodiments of the present utility model provide a screening device and a screening system for battery anode materials. By setting up a screening device, a weighing device, and a linkage control device in cooperation, it is possible to timely detect the damage of the screen mesh in the screening device during the production process of battery anode materials, and stop screening in time to avoid unqualified materials from entering the subsequent process, realizing on-line monitoring of the qualification of the screened materials, thereby avoiding reducing the quality of the battery anode material.

[0004] Specifically, on the one hand, an embodiment of the present utility model provides a screening device for a battery negative electrode material, including a screening device main body, which forms a receiving cavity; a first sieve mesh, disposed in the receiving cavity; a second sieve mesh, disposed in the receiving cavity and spaced apart from the first sieve mesh; wherein, the mesh number of the second sieve mesh is less than that of the first sieve mesh; wherein, the first sieve mesh and the second sieve mesh sequentially divide the receiving cavity into a first inner cavity, a second inner cavity, and a third inner cavity; a feed inlet, disposed at the top of the screening device main body and communicating with the first inner cavity; a first discharge outlet, disposed on one side of the screening device main body and communicating with the first inner cavity; a second discharge outlet, disposed on one side of the screening device main body and communicating with the second inner cavity; and a third discharge outlet, disposed on the side of the screening device main body away from the second discharge outlet and communicating with the third inner cavity.

[0005] In one embodiment, it includes a vibration isolation device and a power device. The power device is located on the outer wall of the screening device, and the vibration isolation device is located at the bottom of the outer wall of the screening device.

[0006] Another embodiment of the present utility model provides a screening system for a battery negative electrode material, including the above-mentioned screening device; a material conveying device, the outlet end of which is communicated with the feed inlet of the screening device; a weighing device, communicated with the second discharge outlet of the screening device; a storage device, the storage device is communicated with the third discharge outlet of the screening device; and a linkage control device, respectively connected to the material conveying device, the screening device, the weighing device, and the storage device.

[0007] In one embodiment, it further includes a switching valve, and the number of the storage devices is multiple; one end of the switching valve is respectively connected to the multiple storage devices, and the other end of the switching valve is communicated with the third discharge outlet.

[0008] In one embodiment, it further includes a buffer bin, the buffer bin is respectively connected to the screening device and the storage device, and a sampling valve is disposed at the outlet end of the buffer bin; the third discharge outlet is communicated with the buffer bin; and a sampling reminder device, connected to the linkage control device; the sampling reminder device is used to remind to sample the material in the buffer bin.

[0009] In one embodiment, it further includes an alarm device, and the alarm device is connected to the linkage control device.

[0010] In one embodiment, it further includes a coarse material bucket, and the first discharge outlet of the screening device is communicated with the coarse material bucket.

[0011] In one embodiment, the weighing device includes an electronic scale and a sample tank. The sample tank is disposed on the electronic scale. The inlet end of the sample tank is communicated with the second discharge port, and the electronic scale is connected to the linkage control device.

[0012] In one embodiment, it further includes a stock bin, and the outlet end of the stock bin is communicated with the inlet end of the material conveying device.

[0013] As can be seen from the above, the above technical features of the present invention may have one or more of the following beneficial effects: The screening device for the negative electrode material of the battery in the embodiment of the present invention is provided with a first screen and a second screen to screen the negative electrode material of the battery in sequence, and a first discharge port, a second discharge port and a third discharge port are provided to convey the materials on the first screen, the materials on the second screen and the materials under the second screen respectively, which is convenient for separately collecting the negative electrode materials that pass through the screen and those that do not pass through the screen.

[0014] In the screening system for the negative electrode material of the battery in the embodiment of the present invention, by setting the cooperation of the screening device, the weighing device and the linkage control device, the damage of the screen in the screening device can be detected in time during the production process of the negative electrode material, and the screening can be stopped in time to avoid unqualified materials from entering the subsequent processes, realizing the on-line monitoring of the qualification of the screened materials, thereby avoiding the reduction of the quality of the negative electrode material of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic diagram of the module connection of a screening system for a negative electrode material of a battery provided by an embodiment of the present invention.

[0017] Figure 2 It is a schematic structural diagram of a screening device for a negative electrode material of a battery provided by an embodiment of the present invention.

[0018] Figure 3 For Figure 1 the specific structural diagram of the screening system in

[0019] Figure 4 It is another structural diagram of a screening system for a negative electrode material of a battery provided by an embodiment of the present invention.

[0020] Figure 5 It is still another structural diagram of a screening system for a negative electrode material of a battery provided by an embodiment of the present invention.

[0021] Figure 6 is Figure 3 The enlarged schematic diagram of the structure at position A in

[0022] Figure 7 Another schematic diagram of module connection of a screening system for a battery anode material provided by an embodiment of the present invention.

[0023] Reference numerals:

[0024] 1. Screening system; 10. Material conveying equipment; 20. Screening equipment; 201. Main body of screening equipment; 2011. Accommodation cavity; 2012. First inner cavity; 2013. Second inner cavity; 2014. Third inner cavity; 202. First screen; 203. Second screen; 204. First discharge port; 205. Second discharge port; 206. Third discharge port; 207. Feed port; 208. Vibration isolation equipment; 209. Power equipment; 30. Weighing equipment; 301. Electronic scale; 302. Sample tank; 40. Linkage control equipment; 50. Storage equipment; 60. Switching valve; 70. Buffer bin; 701. Sampling valve; 702. Sampling reminder equipment; 80. Coarse material bucket; 90. Stock preparation bin; 110. Alarm equipment. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] This embodiment provides a screening system for the screening process in the process of manufacturing the anode material of a lithium-ion battery. The anode material of a lithium-ion battery is a powder material, and its particle size distribution is one of the important factors affecting the battery manufacturing process and battery performance. Usually, the particle size distribution of the anode material of the battery should be controlled within a suitable range, and the characteristic parameters mainly include D v 00, D v 01, D v 10, D v 50, D v 90 and D v 99, D v max. Among them, D v max controls the largest particles in the anode material powder of the battery, mainly through the crushing and shaping processes of the anode material of the battery. However, it is inevitable that there are slightly more than D vThe max controls the escape of large particles; moreover, in subsequent preparation processes of the battery anode material, such as granulation, graphitization, coating carbonization, etc., some particles will agglomerate, fuse, grow, etc., resulting in the existence of large particles in the battery anode material that exceed the D v max control standard. If these large particles enter the end product, they will have a great negative impact on the battery manufacturing process and battery performance: pulping, the existence of large particles will cause the sieve mesh of the slurry screening to be blocked, and it needs to be cleaned frequently, affecting production efficiency; coating, the existence of large particles will cause scratches on the surface of the electrode sheet during the coating process, resulting in the scrapping of the electrode sheet; roll-pressing, large particles that were not exposed in the previous process will produce bright spots during the roll-pressing process, and the large particles will be over-pressed, resulting in the scrapping of the electrode sheet; battery performance, the over-pressed large particles that are not detected by roll-pressing will cause insufficient battery capacity and lithium plating during the charge and discharge process of the battery, ultimately leading to the deterioration of the battery life. In severe cases, safety accidents such as combustion and explosion will occur.

[0027] As Figure 1 、 Figure 2 And Figure 3 shown, an embodiment of the present invention provides a screening system for a battery anode material. The screening system includes a screening device 20, a material conveying device 10, a weighing device 30, a storage device 50, and an interlocking control device 40. The outlet end of the material conveying device 10 is communicated with the feed inlet 207 of the screening device 20. The weighing device 30 is communicated with the second discharge outlet 205 of the screening device 20. The storage device 50 is communicated with the third discharge outlet 206 of the screening device 20. The interlocking control device 40 is respectively connected to the material conveying device 10, the screening device 20, the weighing device 30, and the storage device 50.

[0028] Among them, as Figure 2As shown, the screening device 20 includes a screening device main body 201, a first screen 202, a second screen 203, a feed inlet 207, a first discharge outlet 204, a second discharge outlet 205, and a third discharge outlet 206. The screening device main body 201 forms a receiving cavity 2011; the first screen 202 is disposed within the receiving cavity 2011. The second screen 203 is disposed within the receiving cavity 2011 and is spaced apart from the first screen 202. Among them, the mesh number of the second screen 203 is less than that of the first screen 202. The mesh number range of the first screen 202 is 270 - 325, and the mesh number range of the second screen 203 is 100 - 200. Among them, the first screen 202 and the second screen 203 sequentially divide the receiving cavity 2011 into a first inner cavity 2012, a second inner cavity 2013, and a third inner cavity 2014. The feed inlet 207 is disposed at the top of the screening device main body 201 and communicates with the first inner cavity 2012. The first discharge outlet 204 is disposed on one side of the screening device main body 201 and communicates with the first inner cavity 2012. The second discharge outlet 205 is disposed on one side of the screening device main body 201 and communicates with the second inner cavity 2013. The third discharge outlet 206 is disposed on the side of the screening device main body 201 away from the second discharge outlet 205 and communicates with the third inner cavity 2014.

[0029] Among them, the mesh number of the second screen 203 is less than that of the first screen 202, that is, the mesh number of the first screen 202 is more than that of the second screen 203. Among them, the mesh number of the first screen 202 is, for example, 270 / 300 / 325 mesh, etc., and the mesh number of the second screen 203 is, for example, 100 / 150 / 200 mesh, etc. Among them, the mesh number of the screen is, for example, the number of mesh holes on a 1-inch (25.4 mm) length (or within a preset length range). The mesh number of the screen is inversely proportional to the screen aperture, that is, the aperture on the first screen 202 is smaller than the aperture on the second screen 203.

[0030] The negative electrode material of the battery to be screened (i.e., the material) enters the screening device 20 through the feed port 207 and is screened through the first screen 202 and the second screen 203. Specifically, the material enters the screening device 20, and the material is screened through the first screen 202 to obtain the material on the first screen and the material under the first screen. The material on the first screen is discharged through the first discharge port 204. The material on the first screen is the negative electrode material of the lithium battery that has not passed through the screening of the first screen 202, and the material under the first screen is the negative electrode material of the lithium battery that has passed through the screening of the first screen 202. Since the mesh number of the first screen 202 is larger than that of the second screen 203, when the first screen 202 is not damaged, the material under the first screen can smoothly pass through the screening of the second screen 203 and flow out through the third discharge port 206 and be transported to the storage device 50. When the first screen 202 is damaged, the screening function of the first screen 202 is lost. At this time, many materials larger than each aperture of the first screen 202 will directly discharge from the damaged first screen 202 onto the second screen 203. These materials are unqualified materials. Then, these unqualified materials are screened through the second screen 203 to obtain the material on the second screen and the material under the second screen. The material on the second screen is discharged through the second discharge port 205 to the weighing device 30, and the material under the second screen with unqualified materials is discharged through the third discharge port 206 to the storage device 50. The material on the second screen is the negative electrode material of the lithium battery that has not passed through the second screen 203, and the material under the second screen is the negative electrode material of the lithium battery that has smoothly passed through the second screen 203. Among them, the storage device 50 is, for example, a tank with an inner cavity.

[0031] In one embodiment, as Figure 2 and Figure 7 shown, the screening device 20 further includes a vibration isolation device 208 and a power device 209. The power device 209 is located on the outer wall of the screening device 20, and the vibration isolation device 208 is located at the bottom of the outer wall of the screening device 20; the power device 209 is used to control the working state of the screening device 20. When the power device 209 is turned on and the screening device 20 is in a working vibration state, screening can be carried out. The power device 209 drives the main body 201 of the screening device to vibrate evenly, which helps the material entering the main body 201 of the screening device to be evenly distributed on the first screen 202 and improves the screening efficiency. The vibration of the screening device 20 can effectively discharge the material on the first screen from the first discharge port 204, effectively discharge the material on the second screen from the second discharge port 205, and effectively discharge the material under the second screen from the third discharge port 206. And the vibration isolation device 208 can reduce the impact of the vibration generated by the screening device 20 during operation on the surrounding environment. The vibration isolation device 208 is, for example, a metal helical spring, a rubber spring, a composite spring, an air spring, etc. to achieve the vibration isolation effect. The power device 209 is connected to the linkage control device 40 and receives the control of the linkage control device 40. The power device 209 is, for example, a motor in the prior art.

[0032] The screening system 1 in this embodiment can be used to monitor whether the first screen is damaged. The specific monitoring method is as follows (i.e., the working principle of the screening system 1):

[0033] During operation, first start the screening device 20, and then turn on the material conveying device 10. The material conveying device 10 conveys materials to the screening device 20, and the materials are screened through the first screen 202 and the second screen 203 in sequence. The materials passing through the first screen 202 are divided into materials on the first screen and materials under the first screen. The unqualified materials on the first screen are discharged through the first discharge port 204. Among them, the materials on the first screen are the lithium battery anode material materials that have not passed through the screening of the first screen 202, and the materials under the first screen are the lithium battery anode material materials that have passed through the screening of the first screen 202. The materials on the first screen are sent to the second screen 203 for screening to obtain materials on the second screen and materials under the second screen. The materials on the second screen are the lithium battery anode material materials that have not passed through the screening of the second screen 203, and the materials under the second screen are the lithium battery anode material materials that have passed through the screening of the second screen 203. The materials on the second screen are conveyed to the weighing device 30 through the second discharge port 205, and the materials under the second screen are conveyed to the storage device 50 through the third discharge port 206. The weighing device 30 generates weight information based on the materials on the second screen and sends it to the linkage control device 40. The linkage control device 40 determines whether the weight information exceeds a preset threshold: If it does not exceed the preset threshold, it indicates that the first screen 202 is not damaged, and the system can work normally at this time; if it exceeds the preset threshold, it indicates that the first screen 202 is damaged, resulting in more materials on the second screen 203, indicating that the materials under the second screen conveyed to the storage device 50 also contain unqualified materials. At this time, the linkage control device 40 generates a first control message based on the weight information and sends it to the material conveying device 10 to cause the material conveying device 10 to stop conveying materials to the screening device 20 according to the first control message; generate a sixth control message and send it to the power device 209 to cause the power device 209 to close, and the screening device 20 stops the screening operation; generate a second control message to the storage device 50 to cause the storage device 50 to stop supplying materials to the next process. After the fault is repaired (after the screen replacement is completed), the materials in the storage device 50 storing the unqualified materials are screened again. The first control message is, for example, a message for controlling the material conveying device 10 to stop outputting materials, the sixth control message is, for example, a message for controlling the power device 209 to close to stop the screening device 20 from working, and the second control message is, for example, a message for controlling the storage device 50 to stop conveying materials to the next process.

[0034] Among them, the material conveying device 10 is, for example, a rotary feeder. The material conveying device transports materials into the screening device 20 by rotation. The linkage control device 40 can control the conveying speed of the materials by controlling the rotation speed of the material conveying device 10, preventing the overall operating efficiency of the device from being reduced due to too slow a material conveying speed, or when the material conveying speed is too fast, exceeding the processing capacity of the screening device 20, resulting in overload of the screening device 20 or accumulation and blockage of materials on the screen, affecting the screening efficiency and the service life of the device. And when the linkage control device 40 determines that the first screen 202 is damaged, the linkage control device 40 controls the material conveying device 10 to stop operating to stop conveying materials to the screening device 20. After the fault is repaired (after the screen is replaced), start the material conveying device 10 to continue rotating to convey materials to the screening device 20.

[0035] Among them, the weight information is the weight value of the materials on the second screen measured by the weighing device 30, the preset threshold is the preset value of the weight increase speed, and the increase speed is measured in seconds. For example, when the preset value of the weight increase speed is set to ≤100 g / second, preferably ≤50 g / second. For example, when the preset value of the weight increase speed is set to 100 g / s, the weighing device 30 weighs once per second and feeds back the weight information to the linkage control device 40. When the linkage control device 40 detects that the increased weight of the materials on the second screen within a certain second reaches 100 g / s, the linkage control device 40 performs subsequent operations. The specific weight increase speed can be set according to the actual scenario requirements and is not specifically limited here.

[0036] Among them, a valve is provided on the storage device 50. When the storage device 50 receives the materials under the second screen from the screening device 20, the storage device 50 collects the materials. After the storage device 50 is full, the valve is opened to allow the materials in the storage device 50 to enter the subsequent process. The valve can be controlled by a control module or manually. The manual control method is, for example, to open a viewing window on the storage device 50. The staff observes the material storage situation in the storage device 50 through the viewing window. When the storage device 50 is full, the valve can be opened. The automatic control method is, for example, that the linkage control device 40 is connected to the valve, and a timer is used to calculate the time required for the storage device 50 to be full when the screen in the screening device 20 is not damaged. The linkage control device 40 can set the time according to the measured value this time. After reaching the set time, the linkage control device 40 controls the valve to open. It can be changed according to the actual scenario and is not limited to the above methods.

[0037] Furthermore, the linkage control device 40 can record the running time of the screening device 20. When the set duration is reached, it will prompt to replace the screen mesh on the control interface. When the limit value is reached, the screening device 20 will be automatically prohibited from starting. After the operator replaces the screen mesh, the operator will reset the timer of the linkage control device 40 that records the running time of the screening device 20 and start timing again. It should be noted that the limit value is the time required for the expected screen mesh breakage, and the set duration is the time required for the screen mesh to be about to reach breakage.

[0038] In addition, the screening system 1 may include a stock bin 90, which is used to hold the materials processed in the previous process, that is, the graphite powder after graphitization, coating carbonization, etc. The outlet end of the stock bin 90 is connected to the inlet end of the material conveying device 10 to convey materials to the material conveying device 10.

[0039] As Figure 1 and Figure 4 shown, in one embodiment, the screening system 1 further includes a switching valve 60. The number of storage devices 50 is multiple. The switching valve 60 is respectively connected to multiple storage devices 50, and the third discharge port 206 is connected to the switching valve 60. The switching valve 60 is used to switch the switching valve 60 to convey the material to another storage device 50 when one of the storage devices 50 is full. In addition, in the previous process, when the linkage control device 40 determines that the weight information exceeds the preset threshold, the linkage control device 40 sends the third control information to the switching valve 60, so that the switching valve 60 switches the current storage device to the target storage device among the multiple storage devices according to the third control information, that is, the switching valve 60 connects the third discharge port 206 with the target storage device according to the third control information. Among them, the current storage device is the storage device that is currently receiving materials among the multiple storage devices, and the target storage device is the other storage devices among the multiple storage devices except the current storage device, that is, the other storage device among the multiple storage devices except the current storage device. Since the screening system 1 is always running, the screening system 1 can always monitor and judge whether the first screen mesh is damaged. When it is determined that the first screen mesh is damaged, the switching valve 60 can switch the third discharge port 206 to be connected to the target storage device, and convey the materials in the storage device 50 that previously contained unqualified materials to the stock bin 90 for re-screening. The third control information is, for example, information for controlling the switching valve 60 to switch the third discharge port 206 on the screening device 20 to be connected to a certain storage device 50 among the multiple storage devices 50.

[0040] As Figure 1 、 Figure 5 and Figure 7As shown, in one embodiment, the screening device 20 further includes a buffer bin 70 and a sampling reminder device 702. The buffer bin 70 is respectively connected to the screening device 20 and the storage device 50. A sampling valve 701 is provided at the outlet end of the buffer bin 70, and the third discharge port 206 communicates with the buffer bin 70; the sampling reminder device 702 is used to remind to sample the materials in the buffer bin 70. The sampling reminder device 702 is connected to the linkage control device 40, and the sampling reminder device 702 can be an LED lamp or a buzzer. By presetting time information in the linkage control device 40, when the preset time is reached, the linkage control device 40 sends a fourth control information to the sampling reminder device 702 according to the preset time information. Assuming that the sampling reminder device 702 is an LED lamp, at this time the sampling reminder device 702 lights up. After the staff sees the light, they can close the sampling valve 701 of the buffer bin 70, take out the materials in the buffer bin 70, that is, the materials under the second screen, for inspection, and reset the sampling reminder device 702. If the materials under the second screen are detected to be qualified, it indicates that the first screen 202 is not damaged, that is, the materials in the storage device 50 that is working are qualified. On the contrary, it indicates that the first screen 202 is damaged, and the staff can control the material conveying device 10 and the like to stop working through the linkage control device 40. Among them, the staff can detect the materials taken out from under the second screen through an inspection screen. The mesh number of the inspection screen is equal to that of the first screen 202. If there is no material residue in the inspection screen after screening, the first screen 202 works normally. If there is material residue in the inspection screen after screening, the first screen 202 is damaged. Moreover, the linkage control device 40 can set different sampling times, such as when the storage device 50 starts loading, when the storage device 50 is half full, or when the storage device 50 is about to be full.

[0041] In one embodiment, as Figure 3 and Figure 6 shown, the screening system 1 further includes a coarse material bucket 80. The first discharge port 204 communicates with the coarse material bucket 80. The coarse material bucket 80 timely collects the materials on the first screen that do not pass through the first screen 202, ensures that the materials pass through the screen evenly, improves the screening efficiency, reduces the wear of the screen, and avoids the mixing of unqualified materials and newly conveyed materials, maintaining the consistency of the product.

[0042] In one embodiment, as Figure 7 shown, the screening system 1 further includes an alarm device 110. The alarm device 110 is connected to the linkage control device 40. The alarm device 110 can be an LED lamp or a buzzer. When the linkage control device 40 determines according to the weight information that the weight information exceeds the preset threshold, that is, when the first screen 202 is damaged, the linkage control device 40 sends a fifth control information to the alarm device 110 to remind the staff to check and handle the fault. The fifth control information is, for example, the information for controlling the alarm device 110 to give an alarm.

[0043] In a preferred embodiment of the present embodiment, as Figure 6 shown, the weighing device 30 includes, for example, an electronic scale 301 and a sample tank 302. The sample tank 302 is disposed on the electronic scale 301. The sample tank 302 is in communication with the second discharge port 205 and is used to receive the material on the second sieve; the electronic scale 301 is connected to the linkage control device 40. Specifically, the material remaining on the second sieve 203 enters the sample tank 302 through the second discharge port 205, and the electronic scale 301 weighs it and feeds back the weight information to the linkage control device 40 in real time.

[0044] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0045] In addition, it can be understood that the foregoing embodiments are merely exemplary descriptions of the present invention. On the premise that the technical features do not conflict, the structures are not contradictory, and the inventive purpose of the present invention is not violated, the technical solutions of the various embodiments can be arbitrarily combined and used in combination.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention 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 described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A screening device (20) for a battery anode material, characterized in that, Comprising: A screening equipment main body (201) formed with a receiving cavity (2011); A first sieve (202) disposed within the receiving cavity (2011); A second sieve (203) disposed within the receiving cavity (2011) and spaced apart from the first sieve (202); wherein, the mesh number of the second sieve (203) is less than that of the first sieve (202), the mesh number range of the first sieve (202) is 270 - 325, and the mesh number range of the second sieve (203) is 100 - 200; wherein, the first sieve (202) and the second sieve (203) sequentially divide the receiving cavity (2011) into a first inner cavity (2012), a second inner cavity (2013), and a third inner cavity (2014); A feed inlet (207) disposed at the top of the screening equipment main body (201) and communicating with the first inner cavity (2012); A first discharge outlet (204) disposed on one side of the screening equipment main body (201) and communicating with the first inner cavity (2012); A second discharge outlet (205) disposed on one side of the screening equipment main body (201) and communicating with the second inner cavity (2013); and A third discharge outlet (206) disposed on the side of the screening equipment main body (201) away from the second discharge outlet (205) and communicating with the third inner cavity (2014).

2. The screening device (20) for a battery anode material according to claim 1, wherein, Further comprising a vibration isolation device (208) and a power device (209), the power device (209) is located on the outer wall of the screening equipment (20), and the vibration isolation device (208) is located at the bottom of the outer wall of the screening equipment (20).

3. A screening system (1) for a battery anode material, characterized in that, Comprising: The screening equipment (20) according to any one of claims 1 - 2; A material conveying equipment (10), the outlet end of the material conveying equipment (10) is communicated with the feed inlet (207) of the screening equipment (20); A weighing equipment (30) communicated with the second discharge outlet (205) of the screening equipment (20); A storage equipment (50), the storage equipment (50) is communicated with the third discharge outlet (206) of the screening equipment (20); and An interlocking control equipment (40) respectively connected to the material conveying equipment (10), the screening equipment (20), the weighing equipment (30), and the storage equipment (50).

4. The screening system (1) for a battery anode material according to claim 3, characterized in that, Further comprising a switching valve (60), the number of the storage equipment (50) is multiple; one end of the switching valve (60) is respectively connected to multiple storage equipment (50), and the other end of the switching valve (60) is communicated with the third discharge outlet (206).

5. The screening system (1) for a battery anode material according to claim 3, wherein, Further comprising: A buffer bin (70), the buffer bin (70) is respectively connected to the screening equipment (20) and the storage equipment (50), a sampling valve (701) is disposed at the outlet end of the buffer bin (70); the third discharge outlet (206) is communicated with the buffer bin (70); and A sampling reminder device (702), connected to the linkage control device (40); the sampling reminder device (702) is used to remind to sample the materials in the buffer bin (70).

6. The screening system (1) for a battery anode material according to claim 3, characterized in that It further includes an alarm device (110), and the alarm device (110) is connected to the linkage control device (40).

7. A screening system (1) for a battery anode material according to any one of claims 3-6, characterized in that, It further includes a coarse material bucket (80), and a first discharge port (204) of the screening device (20) is communicated with the coarse material bucket (80).

8. The screening system (1) for a battery anode material according to claim 3, characterized in that: The weighing device (30) includes an electronic scale (301) and a sample tank (302), the sample tank (302) is arranged on the electronic scale (301), an inlet end of the sample tank (302) is communicated with the second discharge port (205), and the electronic scale (301) is connected to the linkage control device (40).

9. The screening system (1) for a battery anode material according to claim 3, characterized in that: It further includes a stock preparation bin (90), and an outlet end of the stock preparation bin (90) is communicated with an inlet end of the material conveying device (10).

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