Electrostatic effect-based pneumatic conveying device for lithium battery positive and negative electrode materials

Abstract

The application discloses a lithium battery positive and negative material pneumatic conveying device based on electrostatic effect, which comprises lithium battery material, a fluidized bed dryer and a central control processing system, one end of the fluidized bed dryer is also provided with a pneumatic conveying device, and the fluidized bed dryer and the pneumatic conveying device are electrically connected with the central control processing system to receive control instructions; the lithium battery material enters the fluidized bed dryer, so that the lithium battery material can be fully dried and treated, and it is easier to carry electrons; then the dried material falls into an electrostatic chamber, and the material is all provided with positive charges through an electrostatic device; when the amount in the bin pump reaches a material level meter, the material falling is stopped, high-pressure gas is injected into the bin pump through a high-pressure gas supply device, so that the material is conveyed to a storage bin along a feeding pipe; since the material is provided with positive charges, the material repels each other, so that the blocking condition is reduced; and a second high-pressure gas pipe and an X-ray detector are arranged at a turning position, so that the blocking condition can be solved in time, and the material can be smoothly conveyed to the storage bin.

Description

Technical Field

[0001] This invention relates to the field of pneumatic conveying technology, and in particular to a pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effects. Background Technology

[0002] Currently, the lithium battery cathode and anode material manufacturing industry cannot function without the handling of raw material powders. To prevent dust pollution during powder transport, which can severely impact product quality, pneumatic conveying is now widely used in sealed pipelines. Pneumatic conveying utilizes airflow to transport powdered materials from one location to another within a closed system. It offers advantages such as small footprint, low dust levels, and minimal infrastructure investment, and has become an integral part of the production process. Simultaneously, it allows for operations such as crushing, grading, drying, heating, and cooling while conveying materials.

[0003] Because the pipeline conveying space of the pneumatic conveying system is limited, and different powder materials have different characteristics, when conveying powder materials that are relatively wet, viscous, have a high specific gravity, and poor air permeability, or when the airflow speed decreases, a large number of particles will separate and deposit at the bottom of the pipeline. These particles will slide or accumulate along the pipeline. When they accumulate to a certain extent, they will form "small dunes" and move forward. When these small dunes encounter local resistance, they will cause blockage.

[0004] Currently, pipeline blockage is one of the most common and difficult-to-handle faults faced by pneumatic conveying systems, accounting for more than 60% of the failure rate of pneumatic conveying systems. Moreover, due to the long pipelines of the conveying system, the maintenance is very difficult. In severe cases, it takes 7-8 hours to clear the pipeline each time. This not only seriously affects the normal operation of the powder material handling system, but also results in high maintenance costs.

[0005] Therefore, there is an urgent need to develop a pneumatic conveying device for transporting powder materials that is less prone to clogging, thereby reducing the failure rate and improving production efficiency. Summary of the Invention

[0006] In view of this, the present invention addresses the deficiencies of the prior art, and its main objective is to provide a pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effects.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect includes lithium battery materials, a fluidized bed dryer, and a central control processing system. One end of the fluidized bed dryer is also equipped with a pneumatic conveying device. Both the fluidized bed dryer and the pneumatic conveying device are electrically connected to the central control processing system to receive control commands. The pneumatic conveying device includes an electrostatic chamber, a silo pump, and a storage silo. A feeding pipe for conveying lithium battery materials is provided between the fluidized bed dryer, the electrostatic chamber, and the silo pump. A pneumatic conveying pipeline is provided between the silo pump and the storage silo. The lithium battery materials sequentially pass through the fluidized bed dryer, the electrostatic chamber, and the silo pump before entering the storage silo.

[0009] As a preferred embodiment, the fluidized bed dryer includes a fluidized bed body, a blower, a heater, an induced draft fan, and a cyclone separator. The fluidized bed body is provided with a feed inlet and a discharge outlet. The discharge outlet, the cyclone separator, and the electrostatic chamber are connected through a feed pipe. The blower and the heater are located on one side of the fluidized bed body, and the induced draft fan and the cyclone separator are located on the other side of the fluidized bed body. The fluidized bed body and the cyclone separator are connected through a feed pipe. An air supply pipe for supplying gas flow is also provided between the blower, the heater, the induced draft fan, the cyclone separator, and the fluidized bed body. The air supply pipe includes an inlet pipe and an outlet pipe.

[0010] The blower introduces gas, which is heated and dried by a heater before being fed into the fluidized bed to dry the lithium battery material. After the lithium battery material is dried, it is transported to the electrostatic chamber through the discharge port. Meanwhile, the gas and remaining lithium battery material in the fluidized bed are transported to a cyclone separator for gas separation, and the gas is discharged from the blower. The cyclone separator then further processes the remaining lithium battery material before it is transported to the electrostatic chamber.

[0011] As a preferred embodiment, the fluidized bed body is configured as a cylindrical structure. A gas equalization plate is provided within the fluidized bed body, positioned at the lower inner end and dividing the interior of the cylindrical body into two chambers. The gas equalization plate has several circumferentially arrayed ventilation holes. The feed inlet is located in the upper middle part of the fluidized bed body, and the discharge outlet is located in the middle of the fluidized bed body and connected to a feed pipe. An air inlet pipe is located at the lower end of the fluidized bed body and connected to a blower and heater, used to heat the incoming gas and blow it upwards into the fluidized bed body to transport lithium battery materials. One end of the feed pipe between the fluidized bed body and the cyclone separator is connected to the upper end of the fluidized bed body, and the other end is connected to the upper outer end of the cyclone separator. The upper end of the cyclone separator is connected to an induced draft fan via an exhaust pipe, thereby discharging the internal gas outwards. The lower end of the cyclone separator is connected to the upper end of the electrostatic chamber via a feed pipe, used to transport remaining lithium battery materials to the electrostatic chamber for further processing.

[0012] As a preferred embodiment, the electrostatic chamber is equipped with an electrostatic device, which is located at the middle of the electrostatic chamber to apply positive charge electrons to the lithium battery materials falling from above, so that the positive charge electrons are uniformly attached to each lithium battery material and there is a certain repulsive force between them, thereby maintaining a certain interval distance.

[0013] As a preferred embodiment, the electrostatic device includes a motor, a plastic roller, a rubber belt, a glass cylinder, and a metal ball. The plastic roller is mounted on a rotating shaft extending from the front end of the motor and rotates with it. One end of the glass cylinder is connected to the metal ball and is located on one side of the plastic roller. One end of the rubber belt is fitted onto the plastic roller, and the other end passes through the glass cylinder and extends into the metal ball. The rubber belt is also provided with an upwardly protruding metal needle that extends into the metal ball and connects to the inner wall of the metal ball, thereby transferring static electricity to the metal ball and transferring positively charged electrons to the lithium battery material at the outer end through the metal ball.

[0014] The electrostatic device is a standard starter motor.

[0015] As a preferred embodiment, a first control valve is provided between the electrostatic chamber and the silo pump. The first control valve is installed on the feeding pipe to restrict the positively charged lithium battery material in the electrostatic chamber from falling downwards. A second control valve is also provided at the lower end of the silo pump and installed on the pneumatic conveying pipeline to restrict the lithium battery material in the silo pump from being conveyed to the storage silo.

[0016] When there is no lithium battery material in the silo pump, the second control valve will close, thereby opening the first control valve to allow the lithium battery material in the electrostatic chamber to fall in. When a certain amount of lithium battery material is stored in the silo pump, the first control valve will close and the second control valve will open to deliver lithium battery material to the storage silo.

[0017] As a preferred embodiment, the lower end of the electrostatic chamber is connected to the upper end of the silo pump via a feeding pipe, so that the lithium battery material with positively charged electrons falls into the silo pump and is stacked. The silo pump is equipped with level gauges at both the upper and lower ends. The level gauges are horizontally installed on the side of the silo pump and extend probes into the silo pump to sense the height and quantity of the lithium battery material stacked in the silo pump. The probes of the level gauges are also equipped with temperature sensors and humidity sensors.

[0018] The level gauge is a dual-rod vibrating level switch. The probe of the dual-rod vibrating level switch adopts a dual-tube structure, so that the inner and outer tubes are at the same frequency. When the outer tube of the probe comes into contact with the lithium battery material, the probe frequency of the outer tube will change, thereby generating a signal change and outputting a control signal to the central control processing system.

[0019] As a preferred embodiment, a high-pressure gas supply device is also provided on one side of the silo pump. A first high-pressure gas pipe is provided between the high-pressure gas supply device and the silo pump to connect the two. When the second control valve is opened, the high-pressure gas supply device will inject high-pressure gas into the silo pump through the first high-pressure gas pipe, so that the lithium battery material is transported backward along the pneumatic conveying pipeline to the storage silo.

[0020] A second high-pressure gas pipe is also provided between the high-pressure gas supply device and the pneumatic conveying pipeline. The second high-pressure gas pipe is used to connect the high-pressure gas supply device and the bend of the pneumatic conveying pipeline. When the bend of the pneumatic conveying pipeline is blocked, the second high-pressure gas pipe will deliver high-pressure gas to it, so that the accumulated lithium battery material can be quickly cleared and conveyed backward.

[0021] As a preferred embodiment, the first high-pressure gas pipe and the second high-pressure gas pipe are equipped with solenoid valves to control the gas delivery status of the high-pressure gas supply device; the first high-pressure gas pipe is also equipped with a gas pressure and flow rate detector to detect the pressure value and flow rate of the high-pressure gas flowing into the chamber pump, and upload the detection data to the central control processing system for analysis and processing.

[0022] As a preferred embodiment, the upper end of the storage silo is connected to the silo pump via a pneumatic conveying pipe, and an exhaust pipe is also provided at the upper end of the storage silo to discharge excess air inside. The lower end of the storage silo is provided with a discharge valve for discharging internal lithium battery materials.

[0023] The pneumatic conveying pipeline is also equipped with an X-ray detector at the bend to detect the flow state of the lithium battery material at the bend. The detection data is uploaded to the central control processing system for analysis and processing. The data is then combined with the data from the air pressure and flow rate detector for analysis, and then control commands are issued to the high-pressure air supply device.

[0024] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0025] This invention provides a pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effects. The lithium battery materials first enter a fluidized bed dryer to ensure thorough drying, making them more susceptible to electron accumulation. The dried materials then fall into an electrostatic chamber, where an electrostatic device imparts a positive charge. Next, they fall into a lower storage tank pump for temporary storage. When the accumulated amount in the pump reaches the upper material level, the feeding stops, and high-pressure gas is injected into the pump via a first high-pressure gas pipe. This gas is then conveyed along the feed pipe to a storage silo for collection. Because the lithium battery materials are positively charged, they repel each other, reducing the likelihood of blockages at pipe bends. A second high-pressure gas pipe and an X-ray detector are installed at the bends in the feed pipe to monitor the pipe's condition. If a blockage is detected, high-pressure gas is supplied through the second high-pressure gas pipe to resolve the blockage, allowing the lithium battery materials to be smoothly conveyed to the storage silo. Once a certain amount is stored, the materials are then discharged for use. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 This is a schematic diagram of the fluidized bed dryer structure of the present invention.

[0029] Figure 3 This is a schematic diagram of the pneumatic conveying device of the present invention.

[0030] Figure 4 This is a schematic diagram of the electrostatic device structure of the present invention.

[0031] Figure 5 This is a cross-sectional structural diagram of the fluidized bed body of the present invention.

[0032] The following are the labeling elements in the figure:

[0033] 100. Fluidized bed dryer; 110. Fluidized bed body; 111. Feed inlet; 112. Discharge outlet; 113. Air distribution plate; 114. Vent; 120. Blower; 130. Heater; 140. Exhaust fan; 150. Cyclone separator; 200. Feed pipe; 300. Pneumatic conveying device; 310. Electrostatic chamber; 320. Silo pump; 330. Storage silo; 331. Exhaust pipe; 332. Discharge valve; 340. Electrostatic device; 341. Motor; 34 2. Plastic roller; 343. Rubber belt; 344. Glass cylinder; 345. Metal ball; 350. First control valve; 360. Second control valve; 370. Level gauge; 400. Air supply pipe; 401. Air inlet pipe; 402. Exhaust pipe; 500. High-pressure air supply device; 510. First high-pressure air pipe; 520. Second high-pressure air pipe; 530. Solenoid valve; 540. Air pressure and flow rate detector; 550. X-ray detector; 600. Pneumatic conveying pipeline. Detailed Implementation

[0034] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0039] Reference Appendix Figure 1 and 3 As shown: A pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect includes lithium battery materials, a fluidized bed dryer 100, and a central control processing system. A pneumatic conveying device 300 is also provided at one end of the fluidized bed dryer 100. Both the fluidized bed dryer 100 and the pneumatic conveying device 300 are electrically connected to the central control processing system to receive control commands, so that the central control processing system can issue commands to control the operation of the fluidized bed dryer 100 and the pneumatic conveying device 300. The pneumatic conveying device 300 includes an electrostatic chamber 310, a silo pump 320, and a storage silo 330. A feeding pipe 200 for conveying lithium battery materials is provided between the fluidized bed dryer 100, the electrostatic chamber 310, and the silo pump 320. A pneumatic conveying pipeline 600 is provided between the silo pump 320 and the storage silo 330, so that the lithium battery materials sequentially pass through the fluidized bed dryer 100, the electrostatic chamber 310, and the silo pump 320 into the storage silo 330.

[0040] Reference Appendix Figure 2 As shown: In this embodiment, the fluidized bed dryer 100 includes a fluidized bed body, a blower 120, a heater 130, an induced draft fan 140, and a cyclone separator 150. The fluidized bed body is provided with an inlet 111 and an outlet 112. The outlet 112, the cyclone separator 150, and the electrostatic chamber 310 are connected through a feed pipe 200. The blower 120 and the heater 130 are arranged on one side of the fluidized bed body 110, and the induced draft fan 140 and the cyclone separator 150 are arranged on the other side of the fluidized bed body 110. The fluidized bed body 110 and the cyclone separator 150 are connected through the feed pipe 200. An air supply pipe 400 for supplying gas flow is also provided between the blower 120, the heater 130, the induced draft fan 140, the cyclone separator 150, and the fluidized bed body 110. The air supply pipe 400 includes an inlet pipe 401 and an outlet pipe 402.

[0041] Specifically, lithium battery materials enter the fluidized bed body 110 through the feed inlet 111. Gas is introduced by the blower 120 and heated and dried by the heater 130 before being fed back into the fluidized bed body 110 to dry the lithium battery materials inside. After the lithium battery materials are dried, they are transported to the electrostatic chamber 310 through the discharge outlet 112. The gas and remaining lithium battery materials in the fluidized bed body 110 are transported to the cyclone separator 150. After the cyclone separator 150 separates the gas and lithium battery materials, the gas is discharged from the blower 140. The remaining lithium battery materials are then further processed by the cyclone separator 150 and then transported to the electrostatic chamber 310.

[0042] Reference Appendix Figure 5 As shown: In this embodiment, the fluidized bed body 110 is configured as a cylindrical structure, and a gas distribution plate 113 is provided inside the fluidized bed body 110. The gas distribution plate 113 is located at the lower inner end of the fluidized bed body 110 and divides the interior of the cylindrical body into two chambers. The gas distribution plate 113 has a plurality of circumferentially arrayed ventilation holes 114, and the diameter of the ventilation holes 114 further away from the center of the gas distribution plate 113 is larger to disperse the gas. The feed inlet 111 is located in the upper middle part of the fluidized bed body 110, and the discharge port is located in the upper middle part of the fluidized bed body 110. An inlet 112 is located in the middle of the fluidized bed body 110 and connected to the feed pipe 200, forming the main feed pipe 200. An air inlet pipe 401 is located at the lower end of the fluidized bed body 110 and connected to the blower 120 and heater 130. Gas entering from the outside first passes through the blower 120, then is heated by the heater 130, and is then fed into the fluidized bed body 110 through the air inlet pipe 401. This allows the gas to be blown upwards to the lithium battery materials for drying. A feed pipe 200 is provided between the fluidized bed body 110 and the cyclone separator 150 to connect the two. One end of the feed pipe 200 is connected to the upper end of the fluidized bed body 110, and the other end is connected to the upper outer end of the cyclone separator 150. This feed pipe 200 is used to convey residual material that fails to exit from the discharge port 112 to the cyclone separator 150, allowing gas and remaining lithium battery material within the fluidized bed body 110 to be conveyed to the cyclone separator 150 via the upper feed pipe 200. The feed pipe 200 also provides access to the upper end of the cyclone separator 150. By connecting the exhaust pipe 402 to the induced draft fan 140, the gas inside the cyclone separator 150 is discharged to the outside through the exhaust pipe 402. The lower end of the cyclone separator 150 is connected to the upper end of the electrostatic chamber 310 through the feed pipe 200, so that a secondary feed pipe 200 is formed between the cyclone separator 150 and the electrostatic chamber 310. This feed pipe 200 is used to transport the remaining lithium battery materials to the electrostatic chamber 310 after reprocessing. Then, the dried lithium battery materials are processed through the electrostatic chamber 310.

[0043] Reference Appendix Figure 4 As shown: In this embodiment, an electrostatic device 340 is provided in the electrostatic chamber 310. By placing the electrostatic device 340 at the middle position of the electrostatic chamber 310, positive charge electrons can be applied to the lithium battery materials falling from above, so that the positive charge electrons are uniformly attached to each lithium battery material and there is a certain repulsive force between them, thereby maintaining a certain interval and storing them in the electrostatic chamber 310.

[0044] Specifically, the electrostatic device 340 includes a motor 341, a plastic roller 342, a rubber belt 343, a glass cylinder 344, and a metal ball 345. The plastic roller 342 is mounted on the shaft extending from the front end of the motor 341, allowing the plastic roller 342 to rotate with the motor 341. One end of the glass cylinder 344 is connected to the metal ball 345, and they are then positioned on one side of the plastic roller 342. One end of the rubber belt 343 is then fitted onto the plastic roller 342, and the rubber belt... The other end of the belt 343 passes through the glass cylinder 344 and extends into the metal ball 345. The rubber belt 343 is also provided with an upwardly protruding metal needle. By inserting the metal needle into the metal ball 345 and connecting the metal needle to the inner wall of the metal ball 345, the generated static electricity is transferred to the metal ball 345. Then, the electrostatic electrons are attached to the outer wall of the metal ball 345, and the positively charged electrostatic molecules are transferred to the lithium battery material through the outer wall of the metal ball 345, so that they all have a positively charged static electricity.

[0045] Furthermore, the electrostatic device 340 used is a paradigm starter motor 341, which can effectively generate static electricity and transfer it to the electrostatic chamber 310 so that the internal lithium battery material carries positively charged electrons.

[0046] In this embodiment, a first control valve 350 is provided between the electrostatic chamber 310 and the silo pump 320. The first control valve 350 is installed on the feed pipe 200 between them, thereby restricting the lithium battery material with positively charged electrons in the electrostatic chamber 310 from falling into the silo pump 320. A second control valve 360 ​​is also provided at the lower end of the silo pump 320, and the second control valve 360 ​​is installed on the pneumatic conveying pipe 600 below the silo pump 320 to restrict the lithium battery material in the silo pump 320 from being conveyed to the storage silo 330.

[0047] When there is no lithium battery material in the silo pump 320, the second control valve 360 ​​will close, thereby opening the first control valve 350 to allow the lithium battery material in the electrostatic chamber 310 to fall in. When a certain amount of lithium battery material is stored in the silo pump 320, the first control valve 350 will close and the second control valve 360 ​​will open to deliver lithium battery material to the storage silo 330.

[0048] In this embodiment, the lower end of the electrostatic chamber 310 is connected to the upper end of the silo pump 320 via the feeding pipe 200, so that the lithium battery material with positively charged electrons falls into the silo pump 320 for stacking. Furthermore, level gauges 370 are installed at both the upper and lower ends of the silo pump 320. The level gauges 370 are horizontally mounted on the side of the silo pump 320 and extend probes into the silo pump 320 to sense the height and quantity of lithium battery material stacked in the silo pump 320. This allows for real-time monitoring of the quantity of lithium battery material stored in the silo pump 320, preventing over-stacking. The level gauges 370 probes also have temperature and humidity sensors, enabling timely detection of internal temperature and humidity changes and uploading the measured data.

[0049] Specifically, the level gauge 370 used is a dual-bar vibrating bar level switch. Since the probe of the dual-bar vibrating bar level switch adopts a dual-tube structure, under normal conditions, the inner and outer tubes are at the same frequency. When the outer tube of the probe comes into contact with the lithium battery material, the probe frequency of the outer tube will change, thereby generating a signal change and outputting a control signal to the central control processing system. The central control processing system then issues a control command to the first control valve 350 or the second control valve 360 ​​to cause lithium battery material to fall into / out of the silo pump 320.

[0050] In this embodiment, a high-pressure gas supply device 500 is provided on one side of the silo pump 320, and a first high-pressure gas pipe 510 is provided between the high-pressure gas supply device 500 and the silo pump 320. The two are connected by the first high-pressure gas pipe 510, so that high-pressure gas can be injected from the first high-pressure gas pipe 510. When the second control valve 360 ​​is opened, the high-pressure gas supply device 500 will inject high-pressure gas into the silo pump 320 through the first high-pressure gas pipe 510, so that the lithium battery material impacted by the high-pressure gas is transported backward along the pneumatic conveying pipe 600 to the storage silo 330. And because the lithium battery material has positively charged electrons, it will not easily accumulate in the pneumatic conveying pipe 600.

[0051] Specifically, a second high-pressure gas pipe 520 is provided between the high-pressure gas supply device 500 and the pneumatic conveying pipeline 600. This second high-pressure gas pipe 520 is connected to the bends in the high-pressure gas supply device 500 and the pneumatic conveying pipeline 600, ensuring that each bend in the pneumatic conveying pipeline 600 is connected to a second high-pressure gas pipe 520. When the bends in the pneumatic conveying pipeline 600 become blocked by lithium battery material, high-pressure gas is supplied to the pneumatic conveying pipeline 600 through the second high-pressure gas pipe 520, allowing the accumulated lithium battery material to be quickly cleared. The material is then conveyed backwards, and a grounding wire is installed on the pneumatic conveying pipe 600 between the silo pump 320 and the storage silo 330 to conduct positively charged electrons that come into contact with the inner wall of the pipe during the conveying process and introduce them into the ground. Furthermore, this section of the pneumatic conveying pipe 600 is relatively long, which is sufficient to allow the positively charged lithium battery material to gradually lose positively charged electrons during the transportation process. This ensures that the lithium battery material loses all positively charged electrons before entering the storage silo 330, so that the lithium battery material is in an uncharged state when it falls into the storage silo 330.

[0052] In this embodiment, solenoid valves 530 are provided on the first high-pressure gas pipe 510 and the second high-pressure gas pipe 520 to control the gas delivery status of the high-pressure gas supply device 500; and a gas pressure and flow rate detector 540 is also provided on the first high-pressure gas pipe 510 to detect the pressure value and flow rate of the high-pressure gas flowing into the chamber pump 320, and upload the detection data to the central control processing system for analysis and processing.

[0053] In this embodiment, the upper end of the storage silo 330 is connected to the silo pump 320 through a pneumatic conveying pipe 600, and an exhaust pipe 331 is also provided on the upper surface of the storage silo 330. The exhaust pipe 331 can timely discharge excess air inside the storage silo 330. The lower end of the storage silo 330 is provided with a discharge valve 332 for discharging internal lithium battery materials. By controlling the discharge valve 332, the stored lithium battery materials can be discharged in an orderly manner and used for subsequent processing.

[0054] In this embodiment, an X-ray detector 550 is installed at the bend of the pneumatic conveying pipeline 600. The X-ray detector 550 can detect the flow state of the lithium battery material at the bend and upload the detection data to the central control processing system for analysis and processing. The data is also analyzed in conjunction with the data from the air pressure and flow rate detector 540. When a conveying abnormality occurs, a control command is promptly issued to the high-pressure air supply device 500 to resolve the blockage in the pneumatic conveying pipeline 600 using high-pressure gas.

[0055] The above are merely preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present invention.

Claims

1. A pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect, comprising lithium battery materials, a fluidized bed dryer, and a central control processing system, characterized in that: One end of the fluidized bed dryer is also equipped with a pneumatic conveying device. Both the fluidized bed dryer and the pneumatic conveying device are electrically connected to the central control processing system to receive control commands. The pneumatic conveying device includes an electrostatic chamber, a silo pump, and a storage silo. A feeding pipe for conveying lithium battery materials is provided between the fluidized bed dryer, the electrostatic chamber, and the silo pump. A pneumatic conveying pipeline is provided between the silo pump and the storage silo. The lithium battery materials sequentially pass through the fluidized bed dryer, the electrostatic chamber, and the silo pump into the storage silo. The fluidized bed dryer includes a fluidized bed body, a blower, a heater, an induced draft fan, and a cyclone separator. The fluidized bed body is provided with a feed inlet and a discharge outlet. The discharge outlet, the cyclone separator, and the electrostatic chamber are connected through a feed pipe. The blower and the heater are located on one side of the fluidized bed body, and the induced draft fan and the cyclone separator are located on the other side of the fluidized bed body. The fluidized bed body and the cyclone separator are connected through a feed pipe. A gas supply pipe for gas flow is also provided between the blower, the heater, the induced draft fan, the cyclone separator, and the fluidized bed body. The gas supply pipe includes an inlet pipe and an outlet pipe. The blower introduces gas, which is heated and dried by a heater, and then fed into the fluidized bed body to dry the lithium battery material. After the lithium battery material is dried, it is transported to the electrostatic chamber through the discharge port. The gas and the remaining lithium battery material in the fluidized bed body are transported to the cyclone separator for gas separation and the gas is discharged from the blower. The cyclone separator then further processes the remaining lithium battery material and then transports it to the electrostatic chamber. The fluidized bed body is configured as a cylindrical structure. A gas equalization plate is located within the fluidized bed body, dividing the interior into two chambers. The gas equalization plate has several circumferentially arrayed ventilation holes. The feed inlet is located in the upper middle part of the fluidized bed body, and the discharge outlet is located in the middle of the fluidized bed body and connected to a feed pipe. An air inlet pipe is located at the lower end of the fluidized bed body and connected to a blower and heater, used to heat the incoming gas and blow it upwards into the fluidized bed body to transport lithium battery materials. One end of the feed pipe between the fluidized bed body and the cyclone separator is connected to the upper end of the fluidized bed body, and the other end is connected to the upper outer end of the cyclone separator. The upper end of the cyclone separator is connected to an induced draft fan via an exhaust pipe, thereby discharging the internal gas outwards. The lower end of the cyclone separator is connected to the upper end of the electrostatic chamber via a feed pipe, used to transport remaining lithium battery materials to the electrostatic chamber for further processing.

2. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 1, characterized in that: The electrostatic chamber is equipped with an electrostatic device, which is located at the middle of the electrostatic chamber to apply positive charge electrons to the lithium battery materials falling from above, so that the positive charge electrons are evenly attached to each lithium battery material and there is a certain repulsive force between them, thereby maintaining a certain interval.

3. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 2, characterized in that: The electrostatic device includes a motor, a plastic roller, a rubber belt, a glass cylinder, and a metal ball. The plastic roller is mounted on a rotating shaft extending from the front end of the motor and rotates with it. One end of the glass cylinder is connected to the metal ball and is located on one side of the plastic roller. One end of the rubber belt is fitted onto the plastic roller, and the other end passes through the glass cylinder and extends into the metal ball. The rubber belt is also provided with an upwardly protruding metal needle, which extends into the metal ball and connects to the inner wall of the metal ball, thereby transferring static electricity to the metal ball and transferring positive charge electrons to the lithium battery material at the outer end through the metal ball. The electrostatic device is a standard starter motor.

4. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 2, characterized in that: A first control valve is also provided between the electrostatic chamber and the silo pump. The first control valve is installed on the feeding pipe to restrict the positively charged lithium battery material in the electrostatic chamber from falling downwards. A second control valve is also provided at the lower end of the silo pump and is installed on the pneumatic conveying pipeline to restrict the lithium battery material in the silo pump from being conveyed to the storage silo. When there is no lithium battery material in the silo pump, the second control valve will close, thereby opening the first control valve to allow the lithium battery material in the electrostatic chamber to fall in. When a certain amount of lithium battery material is stored in the silo pump, the first control valve will close and the second control valve will open to deliver lithium battery material to the storage silo.

5. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 4, characterized in that: The lower end of the electrostatic chamber is connected to the upper end of the silo pump through a feeding pipe, so that the lithium battery material with positively charged electrons falls into the silo pump and is stacked. The silo pump is equipped with level gauges at both the upper and lower ends. The level gauges are horizontally installed on the side of the silo pump and extend probes into the silo pump to sense the height and quantity of the lithium battery material stacked in the silo pump. The probes of the level gauges are also equipped with temperature sensors and humidity sensors. The level gauge is a dual-rod vibrating level switch. The probe of the dual-rod vibrating level switch adopts a dual-tube structure, so that the inner and outer tubes are at the same frequency. When the outer tube of the probe comes into contact with the lithium battery material, the probe frequency of the outer tube will change, thereby generating a signal change and outputting a control signal to the central control processing system.

6. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 5, characterized in that: A high-pressure gas supply device is also provided on one side of the silo pump. A first high-pressure gas pipe is provided between the high-pressure gas supply device and the silo pump to connect the two. When the second control valve is opened, the high-pressure gas supply device will inject high-pressure gas into the silo pump through the first high-pressure gas pipe, so that the lithium battery material is transported backward along the pneumatic conveying pipeline to the storage silo. A second high-pressure gas pipe is also provided between the high-pressure gas supply device and the pneumatic conveying pipeline. The second high-pressure gas pipe is used to connect the high-pressure gas supply device and the bend of the pneumatic conveying pipeline. When the bend of the pneumatic conveying pipeline is blocked, the second high-pressure gas pipe will deliver high-pressure gas to it, so that the accumulated lithium battery material can be quickly cleared and conveyed backward.

7. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 6, characterized in that: The first and second high-pressure gas pipes are equipped with solenoid valves to control the gas delivery status of the high-pressure gas supply device; the first high-pressure gas pipe is also equipped with a gas pressure and flow rate detector to detect the pressure value and flow rate of the high-pressure gas flowing into the chamber pump, and upload the detection data to the central control processing system for analysis and processing.

8. The pneumatic conveying device for positive and negative electrode materials of lithium batteries based on electrostatic effect according to claim 7, characterized in that: The upper end of the storage silo is connected to the silo pump via a pneumatic conveying pipe. An exhaust pipe is also provided at the upper end of the storage silo to discharge excess air inside. A discharge valve is provided at the lower end of the storage silo for discharging internal lithium battery materials. The pneumatic conveying pipeline is also equipped with an X-ray detector at the bend to detect the flow state of lithium battery materials at the bend. The detection data is uploaded to the central control processing system for analysis and processing. The data is then combined with the data from the air pressure and flow rate detector for analysis, and then control commands are issued to the high-pressure air supply device.

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