Battery powder wet screening system

Abstract

A battery powder wet screening system, comprising a mixing device and a screening device; the mixing device is used for mixing and stirring the powder and water and then conveying to the screening device; the screening device comprises a screening frame, a placing plate, a screening upper cover and a screening stirring assembly; the screening frame is placed on the placing plate, the middle part of the placing plate is provided with a flow guide opening, the bottom surface of the screening cavity of the screening frame is a screen mesh located at the flow guide opening, the screening upper cover is detachably sealed and covered on the top surface of the screening cavity of the screening frame, and the screening upper cover is provided with a feeding port communicated with the mixing device; the screening stirring assembly comprises a screening stirring shaft and a screening stirring motor, and the end of the screening stirring shaft close to the screen mesh is provided with a scraper. Therefore, the mixing device can realize the mixing and stirring of the powder and water, the screening device can automatically filter the foreign matters in the slurry, has good screening efficiency, the screening frame can be conveniently taken out or replaced after screening, so that the extraction and separation of the foreign matters are realized and the continuous production is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of battery manufacturing processes, and in particular to a wet screening system for battery powder. Background Technology

[0002] The presence of metallic foreign objects, especially large non-magnetic metallic foreign objects (which are not easily detected and removed), can cause short circuits during battery charging and discharging, leading to battery performance degradation or even safety accidents. Therefore, before the cathode powder is put into production, it is essential to accurately detect any metallic foreign objects to ensure the safety and reliability of the battery.

[0003] In the current testing process, for kilogram-level cathode powder, large non-magnetic metallic foreign objects typically require wet sieving before detection. This step involves mixing the powder with water or other dispersants to form a slurry, separating large foreign objects through manual stirring and sieving, and then drying the sample for subsequent testing.

[0004] However, this manual method has obvious limitations: it is time-consuming and laborious, has poor consistency, and carries the risk of contamination. Utility Model Content

[0005] The purpose of this invention is to provide a wet screening system for battery powder, which has the advantages of automatically screening foreign objects in the powder and improving screening efficiency.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A wet sieving system for battery powder includes a mixing device and a sieving device;

[0008] The mixing device is used to mix and stir the powder with water and then convey it to the screening device;

[0009] The sieving device includes a sieving frame, a placement plate, a sieving cover, and a sieving stirring assembly;

[0010] The sieve frame is removably placed on the placement plate, which has a flow guide in the middle. The bottom surface of the sieve cavity of the sieve frame is a screen located at the flow guide. The sieve cover is detachably sealed to the top surface of the sieve cavity of the sieve frame. The sieve cover has a feed inlet communicating with the mixing device. The sieve stirring assembly includes a sieve stirring shaft extending from the sieve cover into the sieve cavity and a sieve stirring motor for driving the sieve stirring shaft to rotate. A scraper is provided at the end of the sieve stirring shaft near the screen.

[0011] Furthermore, the scraper is a silicone soft scraper.

[0012] Furthermore, the feed inlet of the sieve cover is provided with a feed connector, which is connected to the mixing device through a hose, and the feed connector is also provided with a vent and a liquid inlet.

[0013] Furthermore, the placement plate is mounted on the frame, and the outer periphery of the placement plate guide port has a groove for accommodating the sieve frame. The liquid outlet is connected to the lower part of the guide port and is mounted on the frame. The outer periphery of the groove has several support rods surrounding the outer periphery of the sieve frame, and the top of the support rods is screwed with a locking knob. The periphery of the sieve cover overlaps with each support rod and is locked by the locking knob. The bottom surface of the sieve cover has a sealing ring for sealing the top edge of the sieve frame.

[0014] Furthermore, the placement plate is connected to the frame via several connecting shafts; the lower end of the connecting shaft is fixed to the frame, and a fixing knob is screwed onto the upper end of the connecting shaft; the periphery of the placement plate overlaps with each connecting shaft and is locked in place by the fixing knob.

[0015] Furthermore, the outer periphery of the placement plate is provided with notches facing the same direction for each connecting shaft, and the notches allow the connecting studs at the top of the connecting shafts to pass through longitudinally and laterally.

[0016] Furthermore, the upper end of the sieving and stirring shaft passes through the sieving cover and is detachably connected to the lifting motor shaft at the bottom of the sieving and stirring motor, and the sieving and stirring shaft is rotatably connected to the bearing provided inside the sieving cover.

[0017] Furthermore, the mixing device includes a reaction vessel, a mixing and stirring assembly, and a spraying assembly;

[0018] The top of the reactor is a feeding port, and the bottom has a conical feeding cavity. The lower part of the conical feeding cavity has a feeding channel, and the lower end of the feeding channel is connected to the screening device.

[0019] The mixing and stirring assembly has a mixing and stirring shaft and a mixing and stirring motor. The mixing and stirring shaft extends into the reaction vessel. The upper end of the mixing and stirring shaft is connected to the mixing and stirring motor. The lower end of the mixing and stirring shaft has a blade located in a conical feeding chamber and a threaded push rod extending into the feeding channel.

[0020] The spray assembly includes several spray nozzles located on the inner side of the top edge of the reactor.

[0021] Furthermore, the reactor is made of transparent material; a water inlet pipe is also provided above the feed port of the reactor; and a switch valve is provided between the lower end of the feed channel and the screening device.

[0022] Furthermore, it also includes a frame; the front of the frame is provided with three partitions, upper, middle and lower, the reaction vessel is installed above the upper partition, and the screening device is installed on the middle partition; the back of the frame is also provided with two partitions, left and right, which are used to set up water circuit structure and circuit structure respectively. The water circuit structure is used to supply water to the spray assembly, and the circuit structure is used to control the operation of the screening stirring motor and the mixing stirring motor.

[0023] After adopting the above technical solution, the mixing device of the screening system can realize the mixing and stirring of powder and water. The screening device can not only save manpower to realize automatic screening and automatically filter foreign objects in the slurry, but also has good screening efficiency. Moreover, it can be easily removed or replaced after screening, so as to facilitate the extraction and separation of foreign objects and ensure continuous production.

[0024] The uniformly stirred slurry in the mixing device enters the screening frame through the feed inlet of the screening cover. The top of the screening chamber of the screening frame is sealed by the screening cover, so that the slurry is stored in a closed chamber during screening, which can effectively isolate external contamination and prevent slurry overflow. A large amount of slurry can be screened in the screening chamber at one time, which can improve screening efficiency. The screening stirring motor drives the screening stirring shaft to rotate, which can drive the scraper to scrape on the screen to ensure uniform distribution of slurry during screening and speed up screening. The impurity-free slurry after screening can be discharged through the guide port for collection, which is convenient for subsequent production.

[0025] After sieving for a period of time, the sieve cover can be separated from the sieve frame, and the sieve frame can be removed from the placement plate. This makes it easy to extract the foreign objects trapped in the sieve frame, or to replace it with a new sieve frame. The replacement of the sieve frame is convenient and quick. After replacing it with a new sieve frame, the sieving production task can be resumed in time to ensure continuous production and guarantee sieving efficiency. Attached Figure Description

[0026] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0027] Figure 2 This is a front view of an embodiment of the present utility model;

[0028] Figure 3 This is a cross-sectional view of an embodiment of the present utility model;

[0029] Figure 4 This is a partial exploded view of an embodiment of the present utility model;

[0030] Figure 5 This is a partial structural schematic diagram of an embodiment of the present utility model;

[0031] Figure 6 This is an exploded view of the screening device according to an embodiment of the present invention;

[0032] Figure 7 This is a perspective view of the sieving device according to an embodiment of the present utility model.

[0033] Labeling Explanation: Mixing device 1, Reactor 11, Feed port 111, Conical feed chamber 112, Feed channel 113, Mixing and stirring assembly 12, Mixing and stirring shaft 121, Paddle 1211, Threaded push rod 1212, Mixing and stirring motor 122, Spray assembly 13, Spray nozzle 131, Water inlet pipe 14, Switch valve 15, Screening device 2, Screening frame 21, Screening cavity 211, Screen 212, Placement plate 22, Guide port 221, Groove 222, Notch 223, Screening cover 23, Feed port 231, Feed connector 232 Vent 233, notch 234, sealing ring 235, bearing 236, liquid inlet 237, sieving and stirring assembly 24, sieving and stirring shaft 241, sieving and stirring motor 242, scraper 243, lifting motor shaft 244, positioning hole 245, positioning groove 246, positioning pin 247, hose 25, support rod 26, support stud 261, locking knob 262, connecting shaft 27, connecting stud 271, fixing knob 272, frame 3, upper partition 31, middle partition 32, partition 33, liquid outlet 4, water circuit structure 5, circuit structure 6. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] like Figures 1 to 5 As shown, a wet sieving system for battery powder in this embodiment includes a mixing device 1 and a sieving device 2, both of which can be installed on a frame 3.

[0036] The mixing device 1 is used to mix and stir the powder with water before conveying it to the screening device 2. The powder can be mixed with water first and then added to the mixing device 1 for stirring, or it can be mixed and stirred simultaneously in the mixing device 1 to form a slurry that is easy to screen later. The water can be pure water or other water free of impurities to avoid introducing new impurities.

[0037] See Figure 3 and Figure 6 The sieving device 2 includes a sieving frame 21, a placement plate 22, a sieving cover 23, and a sieving stirring assembly 24.

[0038] The sieve frame 21 is removably placed on the placement plate 22, which has a guide port 221 in the middle. The bottom surface of the sieve cavity 211 of the sieve frame 21 is a screen 212 located at the guide port 221. The sieve cover 23 is detachably sealed to the top surface of the sieve cavity 211 of the sieve frame 21. The sieve cover 23 has a feed inlet 231 that communicates with the mixing device 1. The sieve stirring assembly 24 includes a sieve stirring shaft 241 extending from the sieve cover 23 into the sieve cavity 211 and a sieve stirring motor 242 for driving the sieve stirring shaft 241 to rotate. A scraper 243 is provided at one end of the sieve stirring shaft 241 near the screen 212.

[0039] Therefore, the screening device 2 in this embodiment can not only save manpower to achieve automatic screening and automatically filter foreign objects in the slurry, but also has good screening efficiency. Moreover, the screening frame 21 can be easily removed or replaced after screening to achieve the extraction and separation of foreign objects and ensure continuous production.

[0040] Specifically, when using this screening system, the slurry that is uniformly stirred in the mixing device 1 first enters the screening frame 21 through the feed inlet 231 of the screening cover 23. The top of the screening chamber 211 of the screening frame 21 is sealed by the screening cover 23, so that the slurry is stored in a sealed chamber during screening, which can effectively isolate external contamination and prevent slurry overflow. A large amount of slurry can be screened in the screening chamber 211 at one time, which can improve screening efficiency. The screening stirring motor 242 drives the screening stirring shaft 241 to rotate, which can drive the scraper 243 to scrape on the screen 212 to ensure uniform distribution of slurry and speed up screening during the screening process. The impurity-free slurry after screening through the screen 212 can be discharged through the guide port 221 for collection, which is convenient for subsequent production.

[0041] After sieving for a period of time, the sieve cover 23 can be separated from the sieve frame 21, and the sieve frame 21 can be removed from the placement plate 22. This makes it easy to extract the foreign objects trapped in the sieve frame 21, or to replace it with a new sieve frame 21. The replacement of the sieve frame 21 is convenient and quick. After replacing it with a new sieve frame 21, the sieving production task can be resumed in time to ensure continuous production and guarantee sieving efficiency.

[0042] See Figure 6 In this embodiment, the scraper 243 can be a silicone soft scraper 243. This can prevent large particles of impurities from being squeezed out of the screen 212 by the scraper 243, effectively eliminating over-sieving and ensuring that the screen 212 can fully trap impurities and foreign objects.

[0043] See Figure 7In this embodiment, the feed inlet 231 of the sieve cover 23 is provided with a feed connector 232, which is connected to the mixing device 1 via a hose 25. The feed connector 232 also has a vent 233 on one side and a liquid inlet 237 on the other side. The sieve cover 23 and the mixing device 1 are connected via the hose 25, allowing the hose 25 to be removed when separating the sieve cover 23 and the sieve frame 21, ensuring that production can be quickly resumed after the sieve cover 23 is resealed. The vent 233 allows ventilation of the sealed sieve cavity 211, maintaining appropriate positive pressure, which helps the powder to pass through the sieve evenly. The liquid inlet 237 allows water to be flushed from the edges of the sieve 212 when material accumulates on the screen 212 and is not scraped by the scraper 243, thus cleaning the accumulated material.

[0044] like Figure 1 As shown, the front of the frame 3 may be provided with three partitions: upper, middle and lower. The mixing device 1 may be installed above the upper partition 31, and the screening device 2 may be installed on the middle partition 32.

[0045] Specifically, the placement plate 22 can be mounted on the frame 3. The outer periphery of the guide port 221 of the placement plate 22 has a groove 222 for accommodating the sieve frame 21, so as to facilitate the mounting and positioning of the sieve frame 21.

[0046] Below the guide port 221 of the placement plate 22, there is a liquid outlet 4 disposed on the partition plate 32 in the frame 3; the liquid outlet 4 may be funnel-shaped to facilitate the flow of slurry.

[0047] See Figure 4 and Figure 6 The groove 222 has several support rods 26 surrounding the sieve frame 21. In this embodiment, the support rods 26 are arranged in three circumferentially spaced positions. The bottom of each support rod 26 can be screwed onto the placement plate 22, and the top of the support rod 26 can have a support stud 261 protruding from it. The support stud 261 is screwed with a locking knob 262. The sieve cover 23 overlaps the upper end of each support rod 26 and is locked by the locking knob 262. Specifically, a notch 234 can be provided around the sieve cover 23 corresponding to each support stud 261. The notch 234 can facilitate the support stud 261 to pass through. After the upper end of the support stud 261 is locked by the locking knob 262, the sieve cover 23 can be pressed onto the support rod 26 and also pressed onto the sieve frame 21 to seal the top of the sieve cavity 211.

[0048] In this embodiment, the bottom surface of the sieve cover 23 also has a sealing ring 235 for sealing and overlapping the top edge of the sieve frame 21. The sealing ring 235 can be snapped onto the bottom surface of the sieve cover 23 to improve the sealing effect.

[0049] In this embodiment, the placement plate 22 is connected to the frame 3 via several connecting shafts 27, which means that the plate can be fixed using the connecting shafts 27. In this embodiment, the connecting shafts 27 are arranged in three circumferentially spaced positions, with each connecting shaft 27 surrounding the outer periphery of the liquid outlet 4. The lower end of the connecting shaft 27 is fixed to the frame 3, and the lower end of the connecting shaft 27 can be locked to the partition plate 32 in the frame 3. A fixing knob 272 is screwed onto the upper end of the connecting shaft 27, and the upper end of the connecting shaft 27 may also have a connecting stud 271 to facilitate the screwing of the fixing knob 272. The periphery of the placement plate 22 overlaps the upper end of each connecting shaft 27 and is locked by the fixing knob 272. In other words, the placement plate 22 can be pressed and locked by the cooperation of the fixing knob 272 and the connecting shaft 27.

[0050] In this embodiment, the outer periphery of the placement plate 22 is provided with notches 223 facing the same direction, corresponding to the positions of each connecting shaft 27. The notches 223 allow the connecting studs 271 at the top of the connecting shaft 27 to pass through longitudinally and laterally. In this embodiment, the notches 223 are arranged facing backward, so that the placement plate 22 can be pulled forward away from the frame 3, and can be pulled out of the frame 3 together with the screening frame 21, further facilitating the disassembly and replacement of the screening frame 21.

[0051] like Figure 2 and Figure 3 As shown, in this embodiment, the upper end of the sieving stirring shaft 241 passes through the sieving cover 23 and is detachably connected to the lifting motor shaft 244 at the bottom of the sieving stirring motor 242. The sieving stirring shaft 241 is rotatably connected to a bearing 236 disposed within the sieving cover 23. In this embodiment, a lifting motor shaft 244 can be disposed at the bottom of the sieving stirring motor 242, thereby driving the sieving stirring shaft 241 to rotate while simultaneously lifting it up and down. This, in turn, allows the bearing 236 to work with the sieving cover 23 to lift up and down together. In other words, when disassembling the sieving cover 23, the sieving stirring shaft 241 and the scraper 243 can be disassembled together.

[0052] In this embodiment, the lifting motor shaft 244 can be raised and lowered by the cooperation of the positioning hole 245 at the bottom of the sieving and stirring motor 242, the positioning groove 246 on the lifting motor shaft 244, and the positioning pin 247 that is movably inserted in the positioning hole 245 and the positioning groove 246.

[0053] like Figures 1 to 3 As shown, the mixing device 1 in this embodiment may include a reaction vessel 11, a mixing and stirring assembly 12, and a spraying assembly 13.

[0054] The reactor 11 can be installed on the upper partition 31 of the frame 3. The reactor 11 can be made of transparent material to facilitate observation of the internal slurry. The top of the reactor 11 is a discharge port 111, which can be used to add pre-mixed powder and water. The bottom of the reactor 11 can have a conical discharge cavity 112 to facilitate slurry collection. The lower part of the conical discharge cavity 112 has a discharge channel 113, and the lower end of the discharge channel 113 is connected to the screening device 2 through a flexible hose 25.

[0055] The mixing and stirring assembly 12 has a mixing and stirring shaft 121 and a mixing and stirring motor 122. The mixing and stirring shaft 121 extends into the reaction vessel 11. The upper end of the mixing and stirring shaft 121 is connected to the mixing and stirring motor 122. The lower end of the mixing and stirring shaft 121 has a blade 1211 located in the conical feeding chamber 112 and a threaded push rod 1212 extending into the feeding channel 113. The mixing and stirring motor 122 can automatically drive the mixing and stirring shaft 121 to rotate continuously. The blade 1211 is used to fully agitate the slurry in the conical feeding chamber 112. At the same time, the threaded push rod 1212 is used to further agitate and push the slurry in the feeding channel 113. This can ensure that the powder dissolves quickly in water and prevent the powder from settling in the feeding channel 113 and causing blockage at subsequent screens such as sieve 212, thus ensuring sieving efficiency.

[0056] The spray assembly 13 includes several spray nozzles 131 located on the inner side of the top edge of the reactor 11. Water can be sprayed onto the inner wall of the reactor 11 through each spray nozzle 131, which facilitates cleaning of the inner wall of the reactor 11, allows for easy observation of the slurry state inside the reactor 11, and enables timely and active water replenishment of the slurry as needed. Water addition is convenient and the water volume is stable and adjustable.

[0057] In this embodiment, a water inlet pipe 14 is also provided above the feed port 111 of the reactor 11 for rapid water replenishment; and a switch valve 15 can be provided between the lower end of the feed channel 113 of the reactor 11 and the screening device 2, which can be used to adjust the flow rate in the hose 25, or to close the feed channel 113 when the screening frame 21 is replaced. The switch valve 15 can be a conical valve.

[0058] See Figure 5 As shown, the frame 3 in this embodiment also has two partitions 33 on the back, one on the left and one on the right. The two partitions 33 are used to set up the water channel structure 5 and the circuit structure 6, respectively. The water channel structure 5 is used to supply water to the spray assembly 13, and the circuit structure 6 is used to control the operation of the screening and stirring motor 242 and the mixing and stirring motor 122. In this way, by isolating water and electricity in the structure, good safety protection can be achieved.

[0059] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, equivalent changes and modifications without departing from the principle of this utility model should still fall within the protection scope of this utility model.

[0060] In the description of the embodiments of this application, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships commonly used when the product is in use, or the orientations or positional relationships commonly understood by those skilled in the art. These are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or component 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 this application. In the description of this application, "a plurality of" and "several" mean two or more, unless otherwise explicitly specified.

Claims

1. A wet sieving system for battery powder, characterized in that: Includes mixing and screening devices; The mixing device is used to mix and stir the powder with water and then convey it to the screening device; The sieving device includes a sieving frame, a placement plate, a sieving cover, and a sieving stirring assembly; The sieving frame is removably placed on a placement plate, which has a flow guide in the middle. The bottom surface of the sieving cavity of the sieving frame is a screen located at the flow guide. The sieving cover is detachably sealed to the top surface of the sieving cavity of the sieving frame. The sieving cover has a feed inlet communicating with the mixing device. The sieving and stirring assembly includes a sieving and stirring shaft extending from the sieving cover into the sieving cavity and a sieving and stirring motor for driving the sieving and stirring shaft to rotate. A scraper is provided at the end of the sieving and stirring shaft near the screen.

2. The battery powder wet sieving system according to claim 1, characterized in that: The scraper is a silicone soft scraper.

3. The battery powder wet sieving system according to claim 1, characterized in that: The feed inlet of the sieve cover is provided with a feed connector, which is connected to the mixing device through a hose. The feed connector is also provided with an air vent and a liquid inlet.

4. The battery powder wet sieving system according to claim 1, characterized in that: The placement plate is mounted on the frame. The outer periphery of the placement plate guide port has a groove for accommodating the sieve frame. The liquid outlet is connected to the bottom of the guide port and is mounted on the frame. The outer periphery of the groove has several support rods surrounding the outer periphery of the sieve frame. The top of the support rods is screwed with a locking knob. The periphery of the sieve cover overlaps with each support rod and is locked by the locking knob. The bottom surface of the sieve cover has a sealing ring for sealing the top edge of the sieve frame.

5. A wet sieving system for battery powder according to claim 1 or 4, characterized in that: The placement plate is connected to the frame via several connecting shafts; the lower end of the connecting shaft is fixed to the frame, and the upper end of the connecting shaft is screwed with a fixing knob; the periphery of the placement plate overlaps with each connecting shaft and is locked by the fixing knob.

6. The battery powder wet screening system according to claim 5, characterized in that: The outer periphery of the placement plate is provided with notches facing the same direction for each connecting shaft, and the notches allow the connecting studs at the top of the connecting shafts to pass through longitudinally and laterally.

7. A wet sieving system for battery powder according to claim 4, characterized in that: The upper end of the sieving and stirring shaft passes through the sieving cover and is detachably connected to the lifting motor shaft at the bottom of the sieving and stirring motor. The sieving and stirring shaft is rotatably connected to the bearing installed inside the sieving cover.

8. The wet sieving system for battery powder according to claim 1, characterized in that: The mixing device includes a reaction vessel, a mixing and stirring assembly, and a spraying assembly; The top of the reactor is a feeding port, and the bottom has a conical feeding cavity. The lower part of the conical feeding cavity has a feeding channel, and the lower end of the feeding channel is connected to the screening device. The mixing and stirring assembly has a mixing and stirring shaft and a mixing and stirring motor. The mixing and stirring shaft extends into the reaction vessel. The upper end of the mixing and stirring shaft is connected to the mixing and stirring motor. The lower end of the mixing and stirring shaft has a blade located in a conical feeding chamber and a threaded push rod extending into the feeding channel. The spray assembly includes several spray nozzles located on the inner side of the top edge of the reactor.

9. A wet sieving system for battery powder according to claim 8, characterized in that: The reactor is made of transparent material; a water inlet pipe is also provided above the feed port of the reactor; a switch valve is provided between the lower end of the feed channel and the screening device.

10. A wet sieving system for battery powder according to claim 8, characterized in that: It also includes a frame; the front of the frame is provided with three partitions, upper, middle and lower, the reaction vessel is installed above the upper partition, and the screening device is installed on the middle partition; the back of the frame is also provided with two partitions, left and right, which are used to set up water circuit structure and circuit structure respectively. The water circuit structure is used to supply water to the spray assembly, and the circuit structure is used to control the operation of the screening stirring motor and the mixing stirring motor.

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