A lithium slurry weight reduction metering delivery system

Abstract

The application provides a lithium battery slurry weight-reducing metering conveying system and relates to the technical field of lithium battery manufacturing. The lithium battery slurry weight-reducing metering conveying system comprises at least two static tanks, two material conveying assemblies, a transfer assembly, a static sensor and a controller, a feeding valve is arranged on the feeding port of each static tank, a discharging valve is arranged on the discharging port of each static tank, the material conveying assemblies can transport lithium battery slurry, each feeding valve is connected with the discharging port of a homogenizer through one of the two material conveying assemblies, each discharging valve is connected with the feeding port of the transfer assembly through the other of the two material conveying assemblies, the static sensor can detect the amount of lithium battery slurry in each static tank, the static sensor is electrically connected with the controller and can feed back the detection result to the controller, each feeding valve and each discharging valve are electrically connected with the controller, and the controller can control the opening and closing of each feeding valve and each discharging valve according to the detection result of the static sensor. The lithium battery slurry weight-reducing metering conveying system has the effect of improving the production efficiency of lithium batteries.

Description

Technical Field

[0001] This application relates to the field of lithium battery manufacturing technology, and in particular to a lithium battery slurry weight reduction metering and conveying system. Background Technology

[0002] In the existing lithium battery production process, after the lithium battery slurry is prepared in a homogenizer, it needs to be transferred to a transfer tank for a period of time to allow the binder in the slurry to fully dissolve, ensuring the slurry has good quality. After settling, the transfer tank is then moved to the subsequent coating station to use the lithium battery slurry in the transfer tank for coating processing.

[0003] However, because lithium battery paste will separate into layers if left to stand for too long, which will lead to a decline in the quality of the lithium battery paste, in order to ensure that the quality of the lithium battery paste in the transfer tank does not decline due to prolonged standing time before it is completely used up, users must control the homogenizer to prepare only a small amount of lithium battery paste per batch. After this batch of lithium battery paste is completely used up, the equipment at the coating station is stopped and the next batch of lithium battery paste is prepared and left to stand. This results in poor production efficiency in lithium battery manufacturing.

[0004] In view of this, there is a need to provide a lithium battery slurry weight reduction metering and conveying system. Summary of the Invention

[0005] To address the problem that existing lithium battery slurry transport systems can only hold a small amount of lithium battery slurry per batch, and that once the entire batch of lithium battery slurry is used up, the equipment at the coating station must be shut down to wait for the lithium battery slurry transport system to receive and hold the next batch of lithium battery slurry, thus resulting in poor production efficiency in lithium battery manufacturing, this application provides a lithium battery slurry weight reduction metering and transport system.

[0006] The lithium battery slurry weight reduction metering and conveying system provided in this application adopts the following technical solution: it includes at least two settling tanks, two conveying components, a transfer component, a settling sensor and a controller. Each settling tank is provided with a feed valve at its inlet and a discharge valve at its outlet. The material conveying component can transport lithium battery slurry from its own feed end to its discharge end; Each of the feed valves is connected to the outlet of the homogenizer through one of the two conveying components, and each of the discharge valves is connected to the inlet of the transfer component through the other of the two conveying components. The settling sensor can detect the quantity of lithium battery slurry in each settling tank, and the settling sensor is electrically connected to the controller and can feed back the detection result to the controller; Each of the feed valves and each of the discharge valves are electrically connected to the controller, which can control the opening and closing of each of the feed valves and each of the discharge valves based on the detection results of the stationary sensor.

[0007] By adopting the above technical solution, during feeding, the controller can open the feed valve of the partially filled settling tank based on the detection result of the settling sensor, while keeping the feed valves of other settling tanks closed. This allows the homogenizer to transport the lithium battery slurry prepared by the homogenizer to different settling tanks for settling via its connected conveying components. During discharging, the controller will open the discharge valve of the settling tank containing the settled lithium battery slurry based on the settling time, while keeping the discharge valves of other settling tanks closed. This allows the transfer component to transport the lithium battery slurry from different settling tanks via its connected conveying components. The settled lithium battery paste is removed from the settling tank. The multiple settling tanks allow users to feed different batches of lithium battery paste produced by the homogenizer into different settling tanks for settling. After a batch of lithium battery paste has been set, it is transferred to the transfer unit to supply material for subsequent coating processing. Then, the empty settling tank is used to set the next batch of lithium battery paste. This allows the lithium battery paste weight reduction metering and conveying system to continuously supply settled lithium battery paste for coating processing, thus enabling lithium battery manufacturing to have good production efficiency.

[0008] Specifically, the settling tank includes a tank body, a gantry frame, and a stirring unit, with the tank body located below the crossbeam of the gantry frame; The stirring unit includes a stirring rod, a uniform material rod, and a driving device. The top ends of the stirring rod and the uniform material rod are rotatably connected to the gantry frame. The tank body has stirring holes and uniform material holes leading to its own interior. The bottom end of the stirring rod passes through the stirring hole and extends into the interior of the tank body, where a stirring component is provided. The end of the stirring component away from the stirring rod abuts against the inner side wall of the tank body. The bottom end of the uniform material rod passes through the uniform material hole and extends into the interior of the tank body, where a uniform material knife is provided. Both the stirring rod and the uniform material rod are drive-connected to the driving device, which can drive the stirring rod and the uniform material rod to rotate.

[0009] By adopting the above technical solution, the driving device can drive the stirring rod to rotate the stirring component, so as to stir the lithium battery slurry in the settling tank and scrape off the lithium battery slurry adhering to the inner side wall of the settling tank; the driving device can also drive the homogenizing rod to rotate the homogenizing blade, so that the homogenizing blade can cut the solids in the lithium battery slurry, thereby allowing all the components in the lithium battery slurry to be fully dissolved.

[0010] Furthermore, the settling tank also includes a lifting platform, and the tank body includes a top cover and a material receiving cylinder. The top cover is located at the bottom of the crossbeam of the gantry frame, and the material receiving cylinder is located on the lifting platform. The lifting platform is located on the gantry frame and can move the material receiving cylinder away from the top cover or closer to and assemble with the top cover.

[0011] By adopting the above technical solution, the lifting platform can move the material receiving cylinder away from or close to the top cover and assemble with the top cover, thereby allowing the user to control the lifting platform to lower the material receiving cylinder away from the top cover and clean the inside of the material receiving cylinder.

[0012] Furthermore, the bottom of the material receiving cylinder is provided with rollers, and one side of the material receiving cylinder is provided with a handle.

[0013] By adopting the above technical solution, when cleaning the material receiving cylinder, the user can easily remove the material receiving cylinder from the lifting platform using the handle and rollers.

[0014] Specifically, the transfer assembly includes a transfer tank, a moving frame, a transfer sensor, a stirring rod, and a transfer motor. The transfer tank is mounted on the moving frame, and the bottom of the moving frame is provided with pulleys. The transfer sensor is electrically connected to the controller and can detect the quantity of lithium battery slurry in the transfer tank. The bottom end of the stirring rod extends into the interior of the transfer tank through a through hole in the top of the transfer tank and has a stirring element at that end. One end of the stirring element away from the stirring rod abuts against the inner sidewall of the transfer tank. The transfer motor is drively connected to the stirring rod and can drive the stirring rod to rotate.

[0015] By adopting the above technical solution, users can easily move the transfer tank using a mobile frame, and the controller can determine whether the transfer tank is full of lithium battery slurry based on the detection results of the transfer sensor, and close the originally open discharge valve and conveying components when the transfer tank is full; the stirring rod can stir the lithium battery slurry in the transfer tank so that the quality of the lithium battery slurry in the transfer tank is not easily degraded due to prolonged standing time.

[0016] Furthermore, both the stationary sensor and the transfer sensor are weighing sensors.

[0017] By adopting the above technical solution, the weighing sensor can measure the amount of lithium battery slurry inside the tank without contacting the lithium battery slurry. Compared with common sensors on the market, such as liquid level sensors and infrared detection sensors, which need to contact the lithium battery slurry, the weighing sensor will not be damaged by contact with the lithium battery slurry, thus making the static sensor and the transfer sensor have a longer service life and more accurate detection results.

[0018] Specifically, the material conveying assembly includes a material conveying pump and an iron removal filter. Each of the feed valves is connected to the outlet of the corresponding material conveying pump via a pipe, and the outlet of the homogenizer is connected to the inlet of the material conveying pump via a pipe. Each of the discharge valves is connected to the inlet of the corresponding material conveying pump via a pipe, and the inlet of the transfer assembly is connected to the outlet of the material conveying pump via a pipe. The iron removal filter is provided on the pipe between the transfer assembly and the corresponding material conveying pump, as well as on the pipe between the homogenizer and the corresponding material conveying pump.

[0019] By adopting the above technical solution, the iron removal filtration device can filter the lithium battery slurry passing through it during the feeding and discharging stages, so as to improve the quality of the lithium battery slurry.

[0020] Furthermore, the material conveying assembly also includes multiple pressure sensors. Each pressure sensor is installed on the pipeline between each settling tank and the homogenizer, as well as on the pipeline between each settling tank and the transfer assembly. Each pressure sensor is electrically connected to the controller and can provide feedback of the detection results to the controller.

[0021] By adopting the above technical solution, the controller can determine whether there is excessive pressure in the pipelines between each settling tank and the homogenizer, as well as in the pipelines between each settling tank and the transfer component, when transporting lithium battery slurry, based on the detection results of each pressure sensor. When excessive pressure occurs in a certain pipeline, the controller can stop the transport of that pipeline and alarm the user.

[0022] Furthermore, the settling tank also includes a vacuum pump and a defoaming unit. The vacuum pump is located on the settling tank and can extract the gas inside the settling tank. The stirring rod has a reciprocating screw groove along its length. The defoaming unit is threadedly connected to the reciprocating screw groove. The resistance encountered by the defoaming unit when rotating around the central axis of the stirring rod in the lithium battery slurry is greater than the friction between the stirring rod and the defoaming unit. A defoaming channel is formed on the defoaming unit along the length of the stirring rod. When the lithium battery slurry passes through the defoaming channel, the inner wall of the defoaming channel can crush the air bubbles in the lithium battery slurry.

[0023] By adopting the above technical solution, since the resistance encountered by the defoaming unit when rotating around the central axis of the stirring rod in the lithium battery slurry is greater than the friction between the stirring rod and the defoaming unit, the defoaming unit will move back and forth along the reciprocating screw groove when the stirring rod rotates. This causes the lithium battery slurry in the settling tank to passively pass through the defoaming channel on the defoaming unit and have the air bubbles contained in the lithium battery slurry crushed. The vacuum pump can extract the gas contained in these crushed air bubbles from the settling tank, thereby achieving defoaming of the lithium battery slurry and further improving the quality of the lithium battery slurry.

[0024] Furthermore, the defoaming unit includes a mounting ring, a connecting rod, multiple fixed plates, at least one movable plate, a first fixed magnetic component, a second fixed magnetic component, and two movable magnetic components. The mounting ring is sleeved on the body of the stirring rod and threadedly connected to the reciprocating screw groove. The multiple fixed plates are arranged in parallel and spaced apart, with each fixed plate extending vertically. One side of each fixed plate is fixedly connected to the connecting rod. The fixed plate closest to the stirring rod is the near-rod plate, which is connected to the mounting ring. A magnetic component is provided between each pair of adjacent fixed plates. A movable plate, one side of which is hinged to the connecting rod, forms the defoaming channel between the side of the movable plate near the stirring rod and the surface of the fixed plate. A first fixed magnetic component is located at the top of the near-rod plate, and a second fixed magnetic component is located at the bottom of the near-rod plate. The two movable magnetic components are arranged vertically opposite each other on the movable plate with the movable plate as the center. The stirring rod is provided with a first magnetic ring and a second magnetic ring. The first magnetic ring and the second magnetic ring are arranged vertically opposite each other with the reciprocating screw groove as the center, and the first magnetic ring is located above the second magnetic ring. When the mounting ring moves to the top of the reciprocating screw groove, the magnetic field of the first magnetic ring and the first fixed magnetic component are superimposed, and the first fixed magnetic component attracts the moving magnetic component on the top of the moving plate. At this time, the top of the moving plate tilts towards the stirring rod, and the size of the defoaming channel in the horizontal direction gradually decreases from bottom to top. When the mounting ring moves to the bottom of the reciprocating screw groove, the magnetic field of the second magnetic ring and the second fixed magnetic component are superimposed, causing the second fixed magnetic component to attract the moving magnetic component at the bottom of the moving plate. At this time, the bottom of the moving plate tilts towards the stirring rod, and the size of the defoaming channel in the horizontal direction gradually decreases from top to bottom.

[0025] By adopting the above technical solution, when the mounting ring moves to the top of the reciprocating screw groove, the magnetic fields of the first magnetic ring and the first fixed magnetic component are superimposed, causing the first fixed magnetic component to attract the moving magnetic component at the top of the moving plate. At this time, the top of the moving plate tilts towards the stirring rod, and the horizontal dimension of the defoaming channel gradually decreases from bottom to top. Then, the mounting ring moves downward along the reciprocating screw groove, allowing the lithium battery slurry to pass through the defoaming channel from bottom to top. When the mounting ring moves to the bottom of the reciprocating screw groove, the magnetic fields of the second magnetic ring and the second fixed magnetic component are superimposed, causing the second fixed magnetic component to attract the moving magnetic component at the bottom of the moving plate. At this time, the bottom of the moving plate tilts towards the stirring rod, and the horizontal dimension of the defoaming channel gradually decreases from bottom to top. The dimensions in the direction gradually decrease from top to bottom. Then, the mounting ring moves upward along the reciprocating screw groove, allowing the lithium battery paste to pass through the defoaming channel from top to bottom. Since the side of the moving plate closest to the stirring rod is always tilted away from the stirring rod in the direction of the moving ring's movement, when the lithium battery paste moves away from the stirring rod in the horizontal direction under the action of the rotating stirring rod, the lithium battery paste will collide with the inner wall of the moving plate and be bounced towards the narrower side of the defoaming channel. This avoids the situation where the lithium battery paste collides with the inner wall of the moving plate and is bounced towards the wider side of the defoaming channel, thus preventing it from passing through the defoaming channel. This allows more lithium battery paste to pass through the defoaming channel, resulting in a better defoaming effect for the defoaming unit.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. A device comprising at least two settling tanks, two conveying assemblies, a transfer assembly, a settling sensor, and a controller. Each settling tank is equipped with a feed valve at its inlet and a discharge valve at its outlet. The conveying assemblies are capable of transporting lithium-ion battery slurry from their inlet to their outlet. Each feed valve is connected to the outlet of the homogenizer via one of the two conveying assemblies, and each discharge valve is connected to the inlet of the transfer assembly via the other of the two conveying assemblies. The settling sensor can detect the quantity of lithium battery slurry in each settling tank, and the settling sensor is electrically connected to the controller and can feed back the detection result to the controller. Each feed valve and each discharge valve is electrically connected to the controller. The controller can control the opening and closing of each feed valve and each discharge valve according to the detection result of the settling sensor. During feeding, the controller can open the feed valve of the settling tank that is not full according to the detection result of the settling sensor, and allow the other settling tanks to open. The feed valve remains closed, allowing the homogenizer to transport the prepared lithium-ion battery slurry to different settling tanks via its connected conveyor assembly. During discharge, the controller opens the discharge valve of the settling tank containing the settled lithium-ion battery slurry based on the settling time, while keeping the discharge valves of other settling tanks closed. This allows the transfer assembly to remove the settled lithium-ion battery slurry from the settling tanks via its connected conveyor assembly. Multiple settling tanks are designed... This system allows users to feed different batches of lithium battery slurry produced by the homogenizer into different settling tanks for settling. After a batch of lithium battery slurry has been settling, it is transferred to the transfer unit to supply material for subsequent coating processing. Then, the empty settling tank is used to settling the next batch of lithium battery slurry. This allows the lithium battery slurry weight reduction metering and conveying system to continuously provide settling lithium battery slurry for coating processing, thus enabling lithium battery manufacturing to have good production efficiency. 2. The defoaming unit includes a mounting ring, a connecting rod, multiple fixed plates, at least one movable plate, a first fixed magnetic component, a second fixed magnetic component, and two movable magnetic components. The mounting ring is sleeved on the body of the stirring rod and threadedly connected to the reciprocating screw groove. The multiple fixed plates are arranged in parallel and spaced apart, with each plate extending vertically. One side of each fixed plate is fixedly connected to the connecting rod. The fixed plate closest to the stirring rod is the near-rod plate, which is connected to the mounting ring. A movable plate is provided between each pair of adjacent fixed plates. One side of the movable plate is hinged to the connecting rod, and the movable plate is close to the stirring rod. A defoaming channel is formed between one side of the material rod and the surface of the fixed plate. A first fixed magnetic component is located at the top of the near-rod plate, and a second fixed magnetic component is located at the bottom of the near-rod plate. Two movable magnetic components are positioned vertically opposite each other on the movable plate, with the movable plate as the center. The stirring rod is equipped with a first magnetic ring and a second magnetic ring, which are positioned vertically opposite each other with the reciprocating screw groove as the center, and the first magnetic ring is located above the second magnetic ring. When the mounting ring moves to the top of the reciprocating screw groove, the magnetic fields of the first magnetic ring and the first fixed magnetic component are superimposed, causing the first fixed magnetic component to attract the movable magnetic component on the top of the movable plate. At this time, the movable plate... The top of the device tilts towards the mixing rod, causing the horizontal dimension of the defoaming channel to gradually decrease from bottom to top. Then, the mounting ring moves downwards along the reciprocating screw groove, allowing the lithium battery paste to pass through the defoaming channel from bottom to top. When the mounting ring reaches the bottom of the reciprocating screw groove, the magnetic fields of the second magnetic ring and the second fixed magnetic component are superimposed, causing the second fixed magnetic component to attract the moving magnetic component at the bottom of the moving plate. At this time, the bottom of the moving plate tilts towards the mixing rod, causing the horizontal dimension of the defoaming channel to gradually decrease from top to bottom. Then, the mounting ring moves upwards along the reciprocating screw groove, allowing the lithium battery paste to pass through the defoaming channel from bottom to top. The material flows from top to bottom through the defoaming channel. Because the side of the moving plate closest to the stirring rod is always tilted away from the stirring rod in the direction of the moving ring, when the lithium battery paste moves away from the stirring rod horizontally under the action of the rotating stirring rod, the lithium battery paste will collide with the inner wall of the moving plate and be bounced towards the narrower side of the defoaming channel. This avoids the situation where the lithium battery paste collides with the inner wall of the moving plate and is bounced towards the wider side of the defoaming channel, thus preventing it from passing through the defoaming channel. This allows more lithium battery paste to pass through the defoaming channel, resulting in a better defoaming effect for the defoaming unit. Attached Figure Description

[0027] Figure 1 This is a perspective view of the first embodiment of this application; Figure 2 This is a top view of the first embodiment of this application; Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the AA direction; Figure 4 It is along Figure 2 A schematic cross-sectional view taken along the BB direction; Figure 5 This is a perspective view of the second embodiment of this application; Figure 6 yes Figure 5 A perspective view of the settling tank, in which the tank body is cut vertically to show the defoaming unit inside the tank. Figure 7 yes Figure 6 A schematic enlarged view of region C, showing the defoaming unit; Figure 8 It is along Figure 7 A schematic cross-sectional view taken along the central axis of the connecting rod, showing only a portion of the stirring rod.

[0028] Reference numerals: 1. Settling tank; 11. Tank body; 111. Feed valve; 112. Discharge valve; 113. Top cover; 114. Material receiving cylinder; 1141. Roller; 12. Gantry frame; 13. Mixing unit; 131. Mixing rod; 1311. Reciprocating screw groove; 1312. First magnetic ring; 1313. Second magnetic ring; 132. Material distribution rod; 133. Drive device; 14. Lifting platform; 15. Vacuum pump; 16. Defoaming unit; 161. Mounting ring; 162. Connecting rod; 163. Fixing 1. Plate; 1631. Near-pole plate; 1632. Far-pole plate; 1633. Abutment plate; 164. Moving plate; 165. First fixed magnetic component; 166. Second fixed magnetic component; 167. Moving magnetic component; 2. Material conveying assembly; 21. Material conveying pump; 22. Iron removal and filtration device; 23. Pressure sensor; 3. Transfer assembly; 31. Transfer tank; 32. Moving frame; 33. Transfer sensor; 34. Stirring rod; 35. Transfer motor; 4. Static sensor; 5. Feeding pipe; 6. Discharge pipe. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-8 Further explanation: See Figure 1 and Figure 3In the first embodiment, a lithium battery slurry weight reduction metering and conveying system includes two settling tanks 1, a transfer assembly 3, two conveying assemblies 2, two sets of settling sensors 4, and a controller (not shown in the figure). Each settling tank 1 includes a tank body 11, a gantry frame 12, a lifting platform 14, and a stirring unit 13. The tank body 11 includes a top cover 113, a receiving cylinder 114, a feed valve 111, and a discharge valve 112. The top cover 113 is located at the bottom of the crossbeam of the gantry frame 12, and the feed valve 111 is provided on the top cover 113. The lifting platform 14 is respectively mounted on two columns of the gantry frame 12 on both sides, and the receiving cylinder 114 is located on the gantry frame 12. The material receiving cylinder 114 is suspended in mid-air directly below the crossbeam and supported by the lifting platform 14. Rollers 1141 and discharge valve 112 are provided at the bottom of the material receiving cylinder 114. A handle (not shown in the figure) is provided on one side of the material receiving cylinder 114. The lifting platform 14 can be hydraulically powered so that the user can use the lifting platform 14 to lift the material receiving cylinder 114 to assemble it with the top cover 113, or to lift the material receiving cylinder 114 to lower it so that the material receiving cylinder 114 is away from the top cover 113 and the rollers 1141 contact the ground. Then, by holding the handle, the user can pull the material receiving cylinder 114 off the lifting platform 14 and down the gantry 12 and clean the inside of the material receiving cylinder 114.

[0030] See Figure 1 and Figure 3 The stirring unit 13 includes a stirring rod 131, two equalizing rods 132, and three driving devices 133. The top ends of the stirring rod 131 and the two equalizing rods 132 are rotatably connected to the gantry frame 12. The tank body 11 has a stirring hole and two equalizing holes leading to its interior. The stirring hole is located at the center of the top cover 113, and the two equalizing holes are symmetrically arranged relative to the stirring hole. The equalizing rods 132 and equalizing holes correspond one-to-one. The bottom end of the stirring rod 131 extends through the stirring hole into the interior of the tank body 11, and a stirring element is provided at this end. The center of the stirring element is connected to the stirring rod 131, and both ends of the stirring element extend away from the stirring rod 131 and abut against the inner wall of the tank body 11. The three driving devices 133 All are motors. The output shaft of one motor is connected to the top of the stirring rod 131 and can drive the stirring rod 131 to rotate the stirring component. This allows the stirring component to stir the lithium battery slurry in the settling tank 1 and scrape off the lithium battery slurry adhering to the inner wall of the settling tank 1. The bottom end of each equalizing rod 132 extends into the tank body 11 through a corresponding equalizing hole and is equipped with an equalizing knife at that end. Two motors correspond one-to-one with two equalizing rods 132. Each motor is connected to a corresponding equalizing rod 132 via a belt and can drive the equalizing rod 132 to rotate the equalizing knife. This allows the equalizing knife to cut the solids in the lithium battery slurry, thereby allowing all components in the lithium battery slurry to dissolve fully.

[0031] See Figure 1 and Figure 3Two sets of stationary sensors 4 correspond one-to-one with two gantry frames 12. Each set of stationary sensors 4 includes four stationary sensors 4. Two stationary sensors 4 are arranged opposite each other between the bottom of the column of each gantry frame 12 and the ground, so that each gantry frame 12 is suspended on the ground. The stationary sensor 4 can be a dynamic weighing module with a single range of 2.2 tons and C3 accuracy, so that the stationary sensor 4 can detect the quantity of lithium battery slurry in the stationary tank 1.

[0032] See Figure 2 and Figure 4 The transfer assembly 3 includes a transfer tank 31, a moving frame 32, three transfer sensors 33, a stirring rod 34, and a transfer motor 35. The transfer tank 31 has three supports on its body, each support connected to the moving frame 32 via a transfer sensor 33. The bottom of the moving frame 32 has pulleys. Each transfer sensor 33 is electrically connected to a controller. The transfer sensors 33 can be dynamic weighing modules with a single range of 550KG and C3 accuracy, enabling them to detect the quantity of lithium battery slurry inside the transfer tank 31. The bottom end of the stirring rod 34 extends into the transfer tank 31 through a through-hole at the top and is positioned at that end. The device includes a stirring component, with one end of the stirring component away from the stirring rod 34 abutting against the inner wall of the transfer tank 31. The transfer motor 35 is connected to the stirring rod 34 and can drive the stirring rod 34 to rotate, allowing the user to easily move the transfer tank 31 using the moving frame 32. The controller can determine whether the transfer tank 31 is full of lithium battery slurry based on the detection result of the transfer sensor 33, and close the originally open discharge valve 112 and the conveying component 2 when the transfer tank 31 is full. The stirring rod 34 can stir the lithium battery slurry in the transfer tank 31, so that the lithium battery slurry in the transfer tank 31 is not prone to quality degradation due to prolonged standing time.

[0033] See Figure 1 and Figure 4Each material handling assembly 2 includes a material handling pump 21, a trolley, an iron removal filter 22, and five pressure sensors 23. The material handling pump 21 can be a screw pump. Two feed valves 111 are connected to the outlet of one material handling pump 21 via pipes, and the outlet of the homogenizer (not shown in the figure) is connected to the inlet of the material handling pump 21 via a feed pipe 5. Two discharge valves 112 are connected to the inlet of the other material handling pump 21 via pipes, and the inlet of the transfer tank 31 is connected to the outlet of the material handling pump 21 via a discharge pipe 6. An iron removal filter 22 is connected to both the discharge pipe 6 and the feed pipe. Each iron removal filter 22 is mounted on a corresponding trolley. This iron removal filter 22 is existing technology, and its specific structure will not be described in detail here. This allows the user to perform the following procedures during the feeding and discharging stages: The lithium battery slurry is filtered by the corresponding iron removal filter device 22, thereby improving the quality of the lithium battery slurry. A pressure sensor 23 is installed on the main pipeline of the two pipes between all feed valves 111 and the corresponding screw pump, the main pipeline of the three-way pipe between the two discharge valves 112 and the corresponding screw pump, and the two pipes between all screw pumps and the corresponding iron removal filter device 22. The pressure sensor 23 can be a pressure transmitter connected to the controller, so that the controller can determine whether there is excessive pressure in the pipeline between each settling tank 1 and the homogenizer and the pipeline between each settling tank 1 and the transfer component 3 when transporting lithium battery slurry, and stop the transport of the pipeline and alarm the user when excessive pressure occurs in a certain pipeline.

[0034] The working principle of the first embodiment of this application is as follows: During feeding, the controller can open the feed valve 111 of the unfilled settling tank 1 according to the detection result of the settling sensor 4, and keep the feed valve 111 of the other settling tank 1 closed. Then, the controller starts the conveying pump 21 and the iron removal filter 22 connected to the feeding pipeline 5, so as to transport different batches of lithium battery slurry prepared by the homogenizer to different settling tanks 1 for settling. During discharging, the controller will open the discharge valve 112 of the settling tank 1 with the settling lithium battery slurry according to the settling time of the lithium battery slurry in the settling tank 1, and keep the discharge valve 112 of the other settling tank 1 closed. Then, the controller starts the conveying pump 21 and the iron removal filter 22 connected to the discharge pipeline 6, so as to transfer the settling lithium battery slurry in different settling tanks 1 from the settling tank 1 into the transfer tank 31. The setup of two settling tanks 1 allows users to feed two batches of lithium battery slurry produced successively by the homogenizer into the two settling tanks 1 for settling, with one settling tank 1 corresponding to one batch. After a batch of lithium battery slurry has been set, it is transferred to the transfer tank 31 to supply material for subsequent coating processing. Then, the empty settling tank 1 is used to continue setting the next batch of lithium battery slurry. This allows the lithium battery slurry weight reduction metering and conveying system to continuously provide settling lithium battery slurry for coating processing, thereby achieving good production efficiency in lithium battery manufacturing.

[0035] See Figure 5 and Figure 6 In the second embodiment, the settling tank 1 further includes a vacuum pump 15 and a defoaming unit 16. The vacuum pump 15 is mounted on the settling tank 1 and can extract the gas inside the settling tank 1. The stirring rod 131 has a reciprocating screw groove 1311 along its length. The reciprocating screw groove 1311 is composed of two threaded grooves with the same pitch but opposite directions. Both threaded grooves are arranged to rotate around the shaft of the stirring rod 131, and the two ends of the two threaded grooves are connected to each other through transition curve grooves to form the same groove as the reciprocating screw. The defoaming unit 16 includes a mounting ring 161, two connecting rods 162, multiple fixed plates 163, at least one movable plate 164, a first fixed magnetic component 165, a second fixed magnetic component 166, and two movable magnetic components 167. The number of movable plates 164 is one less than the number of fixed plates 163. Here, we take an example where the number of fixed plates 163 is four and the number of movable plates 164 is three. See Figure 7 and Figure 8 The mounting ring 161 is sleeved on the rod body of the stirring rod 131 and threadedly connected to the reciprocating screw groove 1311. The mounting ring 161 can be an annular assembly with built-in balls that is adapted to the reciprocating screw. All other parts of the defoaming unit 16 except the mounting ring 161 can be set on the same side of the mounting ring 161. This can increase the amount of liquid that the defoaming unit 16 needs to push away when rotating around the central axis of the stirring rod 131 in the lithium battery slurry, and reduce the friction between the stirring rod 131 and the defoaming unit 16. As a result, the resistance encountered by the defoaming unit 16 when rotating around the central axis of the stirring rod 131 in the lithium battery slurry is greater than the friction between the stirring rod 131 and the defoaming unit 16. Finally, the stirring rod 131 can drive the defoaming unit 16 to move up and down along the reciprocating screw groove 1311 through its own rotation.

[0036] See Figure 7 and Figure 8Four fixed plates 163 are arranged parallel to each other along the length of the connecting rods 162 between two parallel connecting rods 162. The surface of each fixed plate 163 extends vertically, and the two sides of each fixed plate 163 are fixedly connected to an adjacent connecting rod 162. The fixed plate 163 closest to the stirring rod 131 is the near rod plate 1631, which is connected to the mounting ring 161. The fixed plate 163 farthest from the stirring rod 131 is the far rod plate 1632. A movable plate 164 is provided between each pair of adjacent fixed plates 163. The two sides of the movable plate 164 are hinged to an adjacent connecting rod 162. On the side of the movable plate 164 closest to the stirring rod 131... A defoaming channel is formed between the surface of the plate and the fixed plate 163. The first fixed magnetic component 165 is located at the top of the near rod plate 1631, and the second fixed magnetic component 166 is located at the bottom of the near rod plate 1631. An abutment plate 1633 is provided on the top and bottom edges of the far rod plate 1632. Two movable magnetic components 167 are arranged vertically relative to each other with the movable plate 164 as the center. The top and bottom edges of each movable plate 164 are hinged to the adjacent movable magnetic component 167. The stirring rod 131 is provided with a first magnetic ring 1312 and a second magnetic ring 1313. The first magnetic ring 1312 and the second magnetic ring 1313 are arranged vertically relative to each other with the reciprocating screw groove 1311 as the center, and the first magnetic ring 1312 is located above the second magnetic ring 1313.

[0037] It should be noted that the aforementioned movable magnetic component 167, the first fixed magnetic component 165, and the second fixed magnetic component 166 can all be magnets, and there is an attraction relationship between the movable magnetic component 167 and the first fixed magnetic component 165, as well as between the movable magnetic component 167 and the second fixed magnetic component 166. The first magnetic ring 1312 and the second magnetic ring 1313 can both be magnets. When the mounting ring 161 moves to the top of the reciprocating screw groove 1311, the magnetic fields of the first magnetic ring 1312 and the first fixed magnetic component 165 are superimposed, causing the first fixed magnetic component 165 to attract the movable magnetic component 167 on the top of the movable plate 164, while the movable magnetic component 167 at the bottom of the movable plate 164 will abut against the abutment plate 1633. At this time, the top of the movable plate 164 tilts towards the stirring rod 131, and the size of the defoaming channel in the horizontal direction gradually decreases from bottom to top. Then, the mounting ring 161 will move downward along the reciprocating screw groove 1311 and allow the lithium battery slurry to pass through the defoaming channel from bottom to top. When the mounting ring 161 moves to the bottom of the reciprocating screw groove 1311, the magnetic field of the second magnetic ring 1313 and the second fixed magnetic component 166 are superimposed, causing the second fixed magnetic component 166 to attract the moving magnetic component 167 at the bottom of the moving plate 164. The moving magnetic component 167 at the top of the moving plate 164 will abut against the abutment plate 1633. At this time, the bottom end of the moving plate 164 is inclined towards the stirring rod 131, and the size of the defoaming channel in the horizontal direction gradually decreases from top to bottom. Then, the mounting ring 161 moves upward along the reciprocating screw groove 1311, and the lithium battery slurry passes through the defoaming channel from top to bottom. Since the side of the moving plate 164 near the stirring rod 131 is always moving away from the stirring rod 131 in the moving direction of the mounting ring 161, The plate is tilted so that when the lithium battery slurry moves away from the stirring rod 131 in the horizontal direction under the action of the rotating stirring rod 131, the lithium battery slurry will collide with the inner wall of the moving plate 164 and be bounced towards the narrower side of the defoaming channel. This avoids the situation where the lithium battery slurry collides with the inner wall of the moving plate 164 and is bounced towards the wider side of the defoaming channel, thus preventing it from passing through the defoaming channel. This allows the lithium battery slurry in the settling tank 1 to passively pass through the defoaming channel on the defoaming unit 16 and have the air bubbles contained in the lithium battery slurry crushed. The vacuum pump 15 can extract the gas contained in these crushed air bubbles from the settling tank 1, thereby achieving defoaming of the lithium battery slurry and further improving the quality of the lithium battery slurry. This results in the defoaming unit 16 having a good defoaming effect.

[0038] Preferably, the first magnetic ring 1312 and the second magnetic ring 1313 can both be electromagnets. When the mounting ring 161 moves to the top of the reciprocating screw groove 1311, the first magnetic ring 1312 will briefly open and immediately close after the first fixed magnetic component 165 is attracted to the moving magnetic component 167 at the top of the moving plate 164. When the mounting ring 161 moves to the bottom of the reciprocating screw groove 1311, the second magnetic ring 1313 will briefly open and immediately close after the second fixed magnetic component 166 is attracted to the moving magnetic component 167 at the bottom of the moving plate 164, so that the first magnetic ring 1312 and the second magnetic ring 1313 will not obstruct the up and down movement of the mounting ring 161 along the reciprocating screw groove 1311.

[0039] The implementation principle of the lithium battery slurry weight reduction metering and conveying system of this application is as follows: During feeding, the controller opens the feed valve 111 of the partially filled settling tank 1 based on the detection result of the settling sensor 4, while keeping the feed valve 111 of the other settling tank 1 closed. Then, it starts the conveying pump 21 and the iron removal filter 22 connected to the feeding pipe 5 to transport different batches of lithium battery slurry prepared by the homogenizer to different settling tanks 1 for settling. During discharging, the controller opens the discharge valve 112 of the settling tank 1 based on the settling time of the lithium battery slurry in the settling tank 1, while keeping the discharge valve 112 of the other settling tank 1 closed. Then, it starts the conveying pump 21 and the iron removal filter 22 connected to the discharge pipe 6 to transport different batches of lithium battery slurry prepared by the homogenizer to different settling tanks 1 for settling. The system can transfer the settled lithium battery slurry from different settling tanks 1 to the transfer tank 31. The two settling tanks 1 allow the user to send two batches of lithium battery slurry produced by the homogenizer into the two settling tanks 1 for settling, with one settling tank 1 corresponding to one batch. After a batch of lithium battery slurry has been set, it is transferred to the transfer tank 31 to supply material for subsequent coating processing. Then, the empty settling tank 1 is used to continue setting the next batch of lithium battery slurry. This allows the lithium battery slurry weight reduction metering and conveying system to continuously provide settled lithium battery slurry for coating processing, thereby achieving good production efficiency in lithium battery manufacturing.

[0040] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lithium battery slurry weight reduction metering and conveying system for conveying lithium battery slurry prepared by a homogenizer, characterized in that: It includes at least two settling tanks, two material conveying components, a transfer component, a settling sensor, and a controller. Each settling tank is equipped with a feed valve at its inlet and a discharge valve at its outlet. The material conveying component can transport lithium battery slurry from its own feed end to its discharge end; Each of the feed valves is connected to the outlet of the homogenizer through one of the two conveying components, and each of the discharge valves is connected to the inlet of the transfer component through the other of the two conveying components. The settling sensor can detect the quantity of lithium battery slurry in each settling tank, and the settling sensor is electrically connected to the controller and can feed back the detection result to the controller; Each of the feed valves and each of the discharge valves are electrically connected to the controller, which can control the opening and closing of each of the feed valves and each of the discharge valves based on the detection results of the stationary sensor. The settling tank includes a stirring unit and a defoaming unit. The stirring unit includes a stirring rod with a reciprocating screw groove along its length. The defoaming unit is threadedly connected to the reciprocating screw groove. The resistance experienced by the defoaming unit when rotating around the central axis of the stirring rod in the lithium battery slurry is greater than the friction between the stirring rod and the defoaming unit. A defoaming channel is formed on the defoaming unit along the length of the stirring rod. When the lithium battery slurry passes through the defoaming channel, the inner wall of the defoaming channel can crush the air bubbles in the lithium battery slurry. The defoaming unit includes a mounting ring, a connecting rod, multiple fixed plates, at least one movable plate, a first fixed magnetic component, a second fixed magnetic component, and two movable magnetic components. The mounting ring is sleeved on the body of the stirring rod and threadedly connected to the reciprocating screw groove. The multiple fixed plates are arranged in parallel and spaced apart, with each fixed plate extending vertically and one side of each fixed plate fixedly connected to the connecting rod. The fixed plate closest to the stirring rod is the near-rod plate, which is connected to the mounting ring. A movable magnetic component is provided between each pair of adjacent fixed plates. The movable plate has one side hinged to the connecting rod, and the defoaming channel is formed between the side of the movable plate near the stirring rod and the side of the fixed plate. The first fixed magnetic component is located at the top of the near-rod plate, and the second fixed magnetic component is located at the bottom of the near-rod plate. The two movable magnetic components are arranged vertically opposite each other on the movable plate with the movable plate as the center. The stirring rod is provided with a first magnetic ring and a second magnetic ring. The first magnetic ring and the second magnetic ring are arranged vertically opposite each other with the reciprocating screw groove as the center, and the first magnetic ring is located above the second magnetic ring.

2. The lithium battery slurry weight reduction metering and conveying system according to claim 1, characterized in that: The settling tank also includes a tank body and a gantry frame, with the tank body located below the crossbeam of the gantry frame; The stirring unit also includes a material equalization rod and a driving device. The top ends of the stirring rod and the material equalization rod are rotatably connected to the gantry frame. The tank body has stirring holes and material equalization holes leading to its own interior. The bottom end of the stirring rod passes through the stirring hole and extends into the interior of the tank body, where a stirring element is provided. The end of the stirring element away from the stirring rod abuts against the inner side wall of the tank body. The bottom end of the material equalization rod passes through the material equalization hole and extends into the interior of the tank body, where a material equalization knife is provided. Both the stirring rod and the material equalization rod are drive-connected to the driving device, which can drive the stirring rod and the material equalization rod to rotate.

3. The lithium battery slurry weight reduction metering and conveying system according to claim 2, characterized in that: The settling tank also includes a lifting platform. The tank body includes a top cover and a material receiving cylinder. The top cover is located at the bottom of the crossbeam of the gantry frame, and the material receiving cylinder is located on the lifting platform. The lifting platform is located on the gantry frame and can move the material receiving cylinder away from or close to the top cover and assemble with the top cover.

4. The lithium battery slurry weight reduction metering and conveying system according to claim 3, characterized in that: The bottom of the material receiving cylinder is equipped with rollers, and one side of the material receiving cylinder is equipped with a handle.

5. The lithium battery slurry weight reduction metering and conveying system according to claim 1, characterized in that: The transfer assembly includes a transfer tank, a moving frame, a transfer sensor, a stirring rod, and a transfer motor. The transfer tank is mounted on the moving frame, and the bottom of the moving frame is equipped with pulleys. The transfer sensor is electrically connected to the controller and can detect the quantity of lithium battery slurry in the transfer tank. The bottom end of the stirring rod extends into the interior of the transfer tank through a through hole in the top of the transfer tank and has a stirring element at that end. The end of the stirring element away from the stirring rod abuts against the inner wall of the transfer tank. The transfer motor is drively connected to the stirring rod and can drive the stirring rod to rotate.

6. The lithium battery slurry weight reduction metering and conveying system according to claim 5, characterized in that: Both the stationary sensor and the transfer sensor are weighing sensors.

7. The lithium battery slurry weight reduction metering and conveying system according to claim 1, characterized in that: The material conveying assembly includes a material conveying pump and an iron removal filter. Each of the feed valves is connected to the outlet of the corresponding material conveying pump via a pipe, and the outlet of the homogenizer is connected to the inlet of the material conveying pump via a pipe. Each of the discharge valves is connected to the inlet of the corresponding material conveying pump via a pipe, and the inlet of the transfer assembly is connected to the outlet of the material conveying pump via a pipe. The iron removal filter is provided on the pipe between the transfer assembly and the corresponding material conveying pump, as well as on the pipe between the homogenizer and the corresponding material conveying pump.

8. A lithium battery slurry weight reduction metering and conveying system according to claim 7, characterized in that: The material conveying assembly also includes multiple pressure sensors. Each pressure sensor is installed on the pipeline between each settling tank and the homogenizer, as well as on the pipeline between each settling tank and the transfer assembly. Each pressure sensor is electrically connected to the controller and can provide feedback of the detection results to the controller.

9. A lithium battery slurry weight reduction metering and conveying system according to claim 2, characterized in that: The settling tank also includes a vacuum pump, which is mounted on the settling tank and is capable of extracting gas from the settling tank.

10. A lithium battery slurry weight reduction metering and conveying system according to claim 9, characterized in that: When the mounting ring moves to the top of the reciprocating screw groove, the magnetic field of the first magnetic ring and the first fixed magnetic component are superimposed, and the first fixed magnetic component attracts the moving magnetic component on the top of the moving plate. At this time, the top of the moving plate tilts towards the stirring rod, and the size of the defoaming channel in the horizontal direction gradually decreases from bottom to top. When the mounting ring moves to the bottom of the reciprocating screw groove, the magnetic field of the second magnetic ring and the second fixed magnetic component are superimposed, causing the second fixed magnetic component to attract the moving magnetic component at the bottom of the moving plate. At this time, the bottom of the moving plate tilts towards the stirring rod, and the size of the defoaming channel in the horizontal direction gradually decreases from top to bottom.

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