Negative electrode material feeding system

Abstract

The utility model discloses a negative electrode material feeding system. The negative electrode material feeding system comprises an ejector, a feeder and a controller, the jet device is mechanically connected with a feeding pipeline of the vacuum feeder and is in communication connection with the controller; the jet device is used for conveying slurry to the feeding pipeline; the feeder is mechanically connected with the feeding pipeline and is in communication connection with the controller; the feeder is used for conveying solid materials to the feeding pipeline; and the controller is configured to control the jet device to start or stop and control the feeder to start or stop.

Description

Technical Field

[0001] This utility model relates to the field of automation equipment technology, and in particular to a negative electrode material feeding system. Background Technology

[0002] In the production process of anode materials (such as graphite and silicon-carbon materials), the feeding stage is a crucial step, and its efficiency and quality directly affect subsequent production and the performance of the final product. However, existing anode material feeding technologies have many shortcomings and are unable to meet the ever-increasing production demands and the manufacturing requirements of high-quality products.

[0003] In terms of material mixing, existing technologies cannot achieve integrated mixing of powder materials and liquid slurries. To achieve solid-liquid mixing, additional equipment is required for pre-spraying and mixing. This not only increases equipment investment and production costs but also makes the production process more cumbersome and prone to uneven material mixing. This is especially true for the production of anode materials (such as graphite anode materials), where the requirements for uniform solid-liquid mixing are extremely high, and existing technologies struggle to meet these requirements. Uneven solid-liquid mixing leads to unstable performance of the anode material, affecting key battery indicators such as charge / discharge efficiency and cycle life, thereby reducing the product's market competitiveness. Utility Model Content

[0004] This invention provides a negative electrode material feeding system to address at least one defect in the existing technology.

[0005] This utility model embodiment provides a negative electrode material feeding system, including:

[0006] Ejector, feeder, and controller;

[0007] The ejector is mechanically connected to the feed pipe of the vacuum feeder, and the ejector is communicatively connected to the controller;

[0008] The jet injector is used to deliver slurry into the feed pipeline;

[0009] The feeder is mechanically connected to the feed pipeline, and the feeder is communicatively connected to the controller;

[0010] The feeder is used to deliver solid material into the feed pipeline;

[0011] The controller is configured to control the start or stop of the jet injector and the start or stop of the feeder.

[0012] Optionally, the jet ejector includes an air inlet, a slurry suction port, and a jet nozzle;

[0013] The air inlet is used to connect to compressed air, the slurry suction port is used to connect to the slurry, and the injection port is used to mechanically connect to the feed pipeline;

[0014] The jet injector uses compressed air to deliver the slurry into the feed pipe.

[0015] Optionally, the injection port is located on the horizontal feed pipe.

[0016] Optionally, a dispersing machine may also be included;

[0017] The dispersing machine is installed on the feed pipe and is mechanically connected to the feed pipe. The dispersing machine is used to disperse the solid material input into the feed pipe, and the dispersed solid material and the slurry are mixed in the feed pipe.

[0018] Optionally, a drain valve may also be included;

[0019] The unblocking valve is located at the discharge port of the feeder and is mechanically connected to the feed pipeline. The unblocking valve is also communicatively connected to the controller.

[0020] The controller is also configured to control the opening or closing of the unblocking valve.

[0021] Optionally, a control circuit may also be included;

[0022] The controller is connected to the control circuit, and the control circuit is electrically connected to the jet injector and the feeder;

[0023] The controller is also configured to control the start or stop of the jet injector and feeder via the control circuit.

[0024] Optionally, the feeder's feed port is equipped with a dust collection suction port.

[0025] Optionally, an air supply valve may also be included;

[0026] The air replenishment valve is installed on the feed pipe and is mechanically connected to the feed pipe. The air replenishment valve is also communicatively connected to the controller.

[0027] The controller is also configured to activate the air replenishment valve when the pressure of the vacuum feeder is less than a preset threshold.

[0028] Optional features also include an air pressure gauge;

[0029] The electrical contacts of the air pressure gauge are located in the control circuit. When the electrical contacts are open, the negative pressure fan, pulse controller, and air shut-off device corresponding to the vacuum feeder are turned off.

[0030] Optionally, the airlock is equipped with a pneumatic valve;

[0031] The air pressure gauge is used to measure the pressure of the gas driving the pneumatic valve. The air pressure gauge is configured to disconnect the electrical contact when the measured pressure value is greater than a preset pressure.

[0032] Compared with existing technologies, the advantages of this invention are as follows: This invention proposes a negative electrode material feeding system, which integrates an ejector, a feeder, and a controller. This integration reduces the complex connection structures and additional components between multiple independent devices, thereby lowering manufacturing and installation costs. Simultaneously, this integrated design simplifies the production process, reduces intermediate steps, improves production efficiency, and further reduces processing costs. The integrated structure makes the entire feeding system more compact, significantly reducing the space required. The ejector is responsible for conveying slurry to the feed pipe, while the feeder conveys solid materials. Both operate under the control of the controller, enabling one-time mixing and feeding of solid and liquid materials under various conditions. This method avoids the cumbersome process of multiple feeding and mixing steps in traditional feeding methods, greatly shortening feeding time and improving production efficiency. Attached Figure Description

[0033] Figure 1 This is the graphite anode material feeding system in the embodiment;

[0034] Figure 2 This is a schematic diagram of the graphite anode material feeding system in the embodiment;

[0035] Figure 3 This is a schematic diagram of the control circuit in the embodiment. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0037] Figure 1 This is the negative electrode material feeding system in the embodiment, see reference. Figure 1 The negative electrode material feeding system includes: an ejector 100, a feeder 200, and a controller 1000.

[0038] The ejector 100 is mechanically connected to the feed line of the vacuum feeder 1, and the ejector 100 is communicatively connected to the controller 1000. The ejector 100 is used to deliver slurry into the feed line.

[0039] The feeder 200 is mechanically connected to the feed pipeline and communicatively connected to the controller 1000; the feeder 200 is used to feed solid materials into the feed pipeline.

[0040] The controller 1000 is configured to control the start or stop of the ejector 100 and the start or stop of the feeder 200.

[0041] In this solution, the vacuum feeder uses vacuum suction to transport materials. The vacuum feeder is equipped with a negative pressure fan. After the negative pressure fan is started, negative pressure is generated in the vacuum feeding system. A negative pressure area is formed at the suction port of the vacuum feeder. Under the action of negative pressure, the material is sucked into the feeding pipeline (from the feeder).

[0042] In this solution, the nozzle of the jet ejector is located inside the feed pipe. The jet ejector works based on the jet principle. High-speed fluid (such as liquid or gas) is ejected from the nozzle of the jet ejector. When the fluid is ejected, a low-pressure area is formed around the nozzle of the jet ejector. This low-pressure area will attract materials (which may include slurry and solid materials) to mix with the fluid. The mixed materials can be transported into the feed pipe.

[0043] In this scheme, the feeder and the vacuum feeder are mechanically connected in the feed pipe. Its main function is to transport the solid material in the negative electrode material to the feed pipe so that it can be processed together with the slurry transported by the jet injector.

[0044] In this solution, the feeder can convey solid materials using mechanical transmission, gravity, or pneumatic conveying. For example, the feeder can use the rotation of spiral blades to propel the solid material forward, allowing it to enter the feed pipe.

[0045] In this solution, the slurry may include active materials, binders, conductive agents, and solvents. Active materials may include artificial graphite, natural graphite, silicon-carbon materials, etc. Binders may include styrene-butadiene rubber (SBR), which enhances the adhesion between active materials and between the active materials and the current collector, ensuring the stability of the electrode structure; and polyvinylidene fluoride (PVDF). Conductive agents may include carbon black (such as acetylene black, Ketjen black, etc.), which improves the conductivity of the electrode and reduces the internal resistance of the battery; and carbon nanotubes (CNTs), which are used to improve the overall performance of the battery. Solvents may include water; N-methylpyrrolidone (NMP), etc.

[0046] In this scheme, the slurry can be used to improve the performance of the negative electrode material to a certain extent. For example, the binder in the slurry can enhance the bonding force between the negative electrode material particles and the current collector, thereby improving the stability and cycle life of the electrode; the conductive additives in the slurry can improve conductivity, thereby improving the charge and discharge performance of the battery.

[0047] In this scheme, the solid material may include at least one of the following: bulk graphite, graphite particles, and additives. The additives may include compounds of metals such as lithium salts, titanium, and aluminum. The additives are used to improve the structural stability and electrochemical performance of the anode material.

[0048] In this solution, the controller can be an industrial computer or a PLC (Programmable Logic Controller), which can precisely control the start or stop of the ejector and feeder.

[0049] For example, when the production process begins and requires the delivery of slurry and solid materials, the controller will send a start signal to the ejector and feeder; and when the preset delivery volume is reached or the production process is paused, the controller will promptly issue a stop signal to ensure the orderly progress of the feeding process.

[0050] The controller can also be used to adjust the operating parameters of the ejector and feeder. For example, for the ejector, it can adjust the flow rate and pressure of the conveyed slurry; for the feeder, it can control the feeding speed and amount of solid material to meet the requirements of different production processes and product quality.

[0051] The controller can also be used to coordinate the control of the ejector and feeder. For example, it can enable the slurry and solid materials to be fed into the feed line in a certain proportion and sequence to ensure the uniformity of the mixing of the negative electrode material and improve the stability of product quality.

[0052] In this solution, the controller can receive instructions from the operator or signals from other sensors in the system through the communication interface.

[0053] Upon receiving a signal, the controller processes and analyzes this information based on preset control logic. Based on the processing results, the controller makes corresponding decisions, such as determining whether to start or stop the equipment, and how to adjust the equipment's operating parameters.

[0054] This embodiment proposes a negative electrode material feeding system. This system integrates an ejector, a feeder, and a controller, reducing the complex connection structures and additional components between multiple independent devices, thereby lowering manufacturing and installation costs. Simultaneously, this integrated design simplifies the production process, reduces intermediate steps, improves production efficiency, and further reduces processing costs. The integrated structure makes the entire feeding system more compact, significantly reducing the space required. The ejector is responsible for conveying the slurry into the feed pipeline, while the feeder conveys the solid material. Both operate under the control of the controller, enabling one-time mixing and feeding of solid and liquid materials under various conditions. This method avoids the cumbersome process of multiple feeding and mixing steps in traditional feeding methods, greatly shortening feeding time and improving production efficiency.

[0055] Based on any of the aforementioned schemes, in one possible implementation, the jet ejector includes an air inlet, a slurry suction inlet, and a jet outlet.

[0056] The air inlet is used to connect to compressed air, the slurry suction port is used to connect to slurry, and the injection port is used to mechanically connect to the feed pipeline; the jet injector uses compressed air to transport the slurry into the feed pipeline.

[0057] In this design, the air inlet can be connected to an air compressor, which generates compressed air to power the operation of the ejector.

[0058] In this design, the slurry suction port can be connected to a container for storing slurry or a pipe for conveying slurry, so that the jet ejector can obtain the required slurry from the outside.

[0059] In this design, the ejector nozzle is mechanically connected to the feed pipe of the vacuum feeder, which transports the slurry to the outlet of the feed pipe. After being processed by the ejector, the slurry enters the feed pipe through the ejector nozzle and then participates in the subsequent production process.

[0060] In this design, when compressed air enters the ejector at high speed from the inlet, the air velocity increases dramatically in the contraction section due to the ejector's internal channel design, while the pressure decreases accordingly. In this low-pressure region, external slurry is drawn into the ejector from the slurry suction port under the influence of the pressure difference.

[0061] In this solution, compressed air is used as a power source to quickly and efficiently transport the slurry into the feed pipeline, improving the efficiency of the feeding system and meeting the needs of large-scale production. During the slurry transport process, the slurry and compressed air are thoroughly mixed, resulting in a more uniform slurry distribution upon entering the feed pipeline. This facilitates the uniform distribution and reaction of materials in subsequent production processes, thereby improving product quality.

[0062] Based on the aforementioned jet injector scheme including a nozzle, in one possible implementation, the nozzle is disposed on a horizontal feed pipe.

[0063] In this design, the solid material in the horizontal feed pipe typically flows horizontally along the pipe. The injection nozzle is positioned on the horizontal feed pipe so that the injection direction of the slurry is consistent with the flow direction of the solid material. Thus, after entering the feed pipe, the slurry moves along with the flow direction of the solid material, continuously contacting and mixing with it during the flow process.

[0064] When the nozzle is in a horizontal feed line, compressed air carries the slurry out of the nozzle. Due to the horizontal spray and the environmental conditions within the feed line, the slurry can be dispersed into fine particles to a certain extent, forming a mist-like state. This is because horizontal spraying allows the slurry to experience a relatively uniform force when in contact with the surrounding air or solid materials, which helps in the dispersion of the slurry.

[0065] Good atomization increases the contact area between the slurry and the solid material. With a larger contact area, the slurry and solid material can mix more thoroughly, resulting in more uniform and stable performance of the subsequently produced anode material.

[0066] Based on any of the aforementioned schemes, in one possible implementation scheme, the negative electrode material feeding system further includes a dispersing machine.

[0067] The dispersant is installed on the feed pipe and is mechanically connected to the feed pipe. The dispersant is used to break up the solid material input into the feed pipe. The broken-up solid material and slurry are mixed in the feed pipe.

[0068] For example, in this solution, the structure of the dispersing machine is not limited; it can be customized according to requirements. The dispersing machine may include:

[0069] The drive unit can consist of a motor and a reducer. The motor provides power to the dispersant, while the reducer reduces the motor's output speed and increases torque to meet the dispersant's requirements for dispersing different materials.

[0070] Main shaft and disintegrating components. The drive unit is connected to the main shaft of the disintegrator through a coupling or pulley and other transmission components, transmitting power to the main shaft, which rotates at high speed under the drive unit.

[0071] Multiple dispersing components are installed on the main shaft. During rotation, the dispersing components tear and disperse the solid material based on their own shape.

[0072] The casing and inlet / outlet. The casing protects the internal transmission and dispersing components, and also provides a closed space for dispersing the material. The outlet is located at the other end of the casing. The dispersed solid material is discharged from here and enters the subsequent feed pipeline to mix with the slurry. The outlet is tightly connected to the feed pipeline.

[0073] Adjustment device. The adjustment device can adjust the gap between the dispersing component and the inner wall of the machine casing, or change the rotation speed of the dispersing component. By adjusting these parameters, the degree of dispersal can be controlled to meet the requirements of different production processes for the dispersing effect of solid materials.

[0074] In this design, a suitable horizontal straight section is selected in the feed pipeline, and the dispersant is installed at this location. Ensure that the inlet and outlet of the dispersant are tightly connected to the feed pipeline, and that the connection points are well-sealed to prevent material leakage.

[0075] In this scheme, the feeder first transports the solid material to the feed pipeline. After passing through the feed pipeline, the solid material enters the disperser. The solid material that has been dispersed by the disperser enters the feed pipeline and is mixed with the slurry.

[0076] In this scheme, a dispersant is used to break up the solid material. By setting the parameters of the dispersant, the particle size of the solid material can be classified, ensuring that only particles within a specific particle size range can enter the subsequent processes. This makes the particle size of the solid material entering the mixing stage relatively uniform, laying the foundation for uniform mixing with the slurry and greatly improving the uniformity of the material particle size.

[0077] When the solid material has a uniform particle size, it can more evenly coat the surface of the solid material particles when mixed with the slurry. This good coating effect helps improve the performance stability of the anode material, ensuring more consistent electrochemical performance during battery charging and discharging.

[0078] Based on any of the aforementioned schemes, in one possible implementation scheme, the negative electrode material feeding system further includes a drain valve.

[0079] The unblocking valve is located at the discharge port of the feeder and is mechanically connected to the feed pipeline. The unblocking valve is also connected to the controller. The controller is also configured to control the opening or closing of the unblocking valve.

[0080] In this solution, the unblocking valve can be set to be opened or closed manually, or controlled by a controller. The unblocking valve is used to activate when the vacuum feeder becomes blocked. When the unblocking valve is working, the movement of the valve core changes the flow rate in the pipeline to achieve the purpose of replenishing air and clearing blockages.

[0081] Based on any of the aforementioned schemes, in one possible implementation scheme, the negative electrode material feeding system further includes a control circuit.

[0082] The controller is connected to the control circuit, which is electrically connected to the ejector and feeder. The controller is also configured to control the start or stop of the ejector and feeder through the control circuit.

[0083] In this design, relays can be used to control the current. Based on the rated voltage and current of the ejector and feeder, a suitable relay should be selected. The rated current of the relay contacts should be greater than the operating current of the equipment to ensure safety and reliability.

[0084] In this solution, taking a PLC controller as an example, the PLC output is connected to a relay coil: the PLC output port is connected to the relay coils controlling the ejector and the feeder respectively. When the PLC outputs a high-level signal, the relay coil is energized and the contacts close; when it outputs a low-level signal, the relay coil is de-energized and the contacts open.

[0085] Connect the normally open contacts of the relay in series in the power supply circuits of the ejector and the feeder, respectively. Connect the output port of the PLC to the coil pin of the relay via a wire. When the relay contacts are closed, the equipment is powered on and starts; when the contacts are open, the equipment is powered off and stops.

[0086] Connect the positive terminal of the 24V DC power supply to the power input terminal of the PLC, and the negative terminal to the common terminal of the PLC. Simultaneously, connect the positive terminal of the power supply to the power input terminal of the relay via a fuse, and the negative terminal to the common terminal of the relay.

[0087] Based on any of the aforementioned schemes, in one possible implementation scheme, the feeding port of the feeder is equipped with a dust collection suction port.

[0088] The purpose of installing an integrated suction port at the feeding port in this solution is to prevent dust from spreading into the air during the feeding process and causing harm to workers and equipment.

[0089] Based on any of the aforementioned schemes, in one possible implementation scheme, the negative electrode material feeding system further includes a gas replenishment valve.

[0090] In this design, the air replenishment valve is installed on the feed pipeline and mechanically connected to it. The air replenishment valve is also communicatively connected to the controller. The controller is further configured to activate the air replenishment valve when the pressure of the vacuum feeder is lower than a preset threshold.

[0091] In this design, the gas replenishment valve can be equipped with a pressure sensor. The pressure sensor transmits the pressure signal to the controller. When the pressure of the vacuum feeder is lower than a preset threshold, the control device will drive the gas replenishment valve to open, allowing gas to enter the system. As gas enters, the system pressure gradually rises. When the pressure reaches the set value, the control device will control the gas replenishment valve to close, stopping the gas replenishment.

[0092] In this solution, the air replenishment valve is used to maintain stable air pressure in the vacuum feeding system. When the air consumption of the pneumatic equipment increases or the air source pressure drops, the air replenishment valve opens to replenish external gas and ensure the normal operation of the pneumatic equipment.

[0093] Appropriate gas replenishment can improve the flowability of materials. For powder materials such as negative electrode materials, gas replenishment can reduce the friction between material particles, reduce material agglomeration and blockage, and allow the material to move more smoothly in the feed pipeline, thereby improving the conveying efficiency of the feeding system.

[0094] In this solution, based on the controller and the air replenishment valve, when the vacuum feeding system experiences ordinary material blockage, the blockage can be cleared by controlling the air replenishment valve. This enables automatic intervention in ordinary material blockage situations, ensuring that the vacuum feeding system does not stop and does not affect normal operation.

[0095] In this design, the air replenishment valve can be installed in areas of the feed pipeline prone to pressure fluctuations or material conveying obstructions. For example, it can be installed near the ejector or disperser. Installing the air replenishment valve nearby allows for a more timely response to pressure changes, effectively replenishing air and ensuring the normal operation of the system.

[0096] Based on any of the aforementioned solutions, in one possible implementation, an air pressure gauge can also be configured in the control circuit.

[0097] The electrical contacts of the air pressure gauge are located in the control circuit. When the electrical contacts are open, the negative pressure fan, pulse controller, and air shut-off device corresponding to the vacuum feeder are shut down.

[0098] In this solution, the airlock mainly consists of an impeller, a housing, and seals. It is used to transport materials to the outlet of the vacuum feeder by rotating the impeller, and at the same time, it forms a seal between the impeller and the housing to prevent air leakage.

[0099] In this solution, the vacuum feeder can be equipped with a filter, thus enabling it to filter materials.

[0100] In this solution, the pulse controller can be used to send a signal to start the backflushing device when the pressure on the filter surface reaches a certain value, so as to blow off the material adhering to the filter, restore the air permeability of the filter, and ensure the continuous and efficient operation of the equipment.

[0101] Among them, the backflush time interval parameters, pulse width parameters, backflush pressure parameters, etc. of the pulse controller can be pre-configured so that the pulse controller can run automatically according to the predicted parameters after startup.

[0102] In this scheme, the electrical contacts of the air pressure gauge are used as the trigger switch for the control signal. When the electrical contacts are disconnected, it indicates that the system pressure is abnormal. At this time, the power supply to the negative pressure fan, pulse controller and air shut-off device is cut off by the control circuit to ensure system safety.

[0103] Based on any of the aforementioned schemes, in one possible implementation scheme, the airlock is equipped with a pneumatic valve; an air pressure gauge is used to measure the pressure of the gas driving the pneumatic valve, and the air pressure gauge is configured to disconnect the electrical contacts when the measured pressure value is greater than a preset pressure.

[0104] In this design, the pneumatic valve uses compressed air as a power source to open and close. The pneumatic valve controls the operating state of the airlock. When the pneumatic valve opens, compressed air enters the airlock, causing it to perform corresponding material conveying actions; when the pneumatic valve closes, it cuts off the compressed air supply to the airlock, and the airlock stops working.

[0105] In this design, an air pressure gauge with electrical contacts and an accuracy that meets the system's pressure measurement requirements is selected. It is ensured that its measurement range covers the normal operating pressure range of the gas driving the pneumatic valve, and that the rated current and voltage of the electrical contacts are compatible with the subsequent control circuitry. For example, if the pneumatic valve's operating pressure is 0.2–0.6 MPa, an air pressure gauge with a range of 0–1 MPa can be selected.

[0106] Connect the compressed air source to the air inlet of the air pressure gauge through a suitable pipe to ensure that the air source pressure is stable and within the measurement range of the air pressure gauge.

[0107] A pipe is led out from the outlet of the air pressure gauge and connected to the inlet of the pneumatic valve, so that the gas that has passed through the pressure measurement can drive the pneumatic valve to work.

[0108] In this design, the electrical contacts of the air pressure gauge are connected to the control circuit. One end of the electrical contact is connected to the controller, the other end is connected to one end of the coil of the control relay, and the other end is connected to the negative terminal of the power supply.

[0109] Based on the operating requirements of the airlock and pneumatic valve, a preset pressure value is set on the air pressure gauge. For example, if the pneumatic valve needs to close the airlock when the gas pressure reaches 0.5 MPa, then the preset pressure value is set to 0.5 MPa. When the actual measured gas pressure exceeds this preset value, the electrical contacts of the air pressure gauge will open, and the controller will control the negative pressure fan, pulse controller, and airlock to close.

[0110] Figure 2 This is a schematic diagram of the negative electrode material feeding system in the embodiment. Figure 3 This is a schematic diagram of the control circuit in the embodiment, for reference. Figure 2 and Figure 3Based on any of the aforementioned schemes, in one possible implementation scheme, the negative electrode material feeding system includes: an ejector 100, a feeder 200, and a controller.

[0111] The jet ejector 100 includes an air inlet 101, a slurry suction port 102, and an injection port 103; the air inlet is used to receive compressed air, and the slurry suction port is used to receive slurry.

[0112] The injection port 103 is used for mechanical connection with the feed line; the jet injector 100 uses compressed air to transport the slurry into the feed line. The injection port 103 is located on a horizontal feed line.

[0113] It also includes a dispersant 200; the dispersant 200 is installed on the feed pipe and is mechanically connected to the feed pipe. The dispersant 200 is used to disperse the solid material input into the feed pipe, and the dispersed solid material and slurry are mixed in the feed pipe.

[0114] It also includes a drain valve 201; the drain valve is located at the discharge port of the feeder 200 and is mechanically connected to the feed pipeline, and the drain valve 201 is communicatively connected to the controller.

[0115] In this scheme, the vacuum feeder is equipped with a negative pressure fan 2, a pulse controller, an air shut-off valve, an air pressure gauge 3, and an air replenishment valve. The air shut-off valve is also equipped with a pneumatic valve.

[0116] In this design, the dispersing machine 200 can be a customized integrated pin dispersing device, wherein the dispersing component of the pin dispersing device is a pin rotor, which is mounted on the main shaft. The pin rotor consists of multiple discs and pins evenly distributed on the discs.

[0117] The integrated rod-pin dispersing device is equipped with a grading device, which is usually located near the discharge port of the device. The grading device can be a static grading blade or a dynamic grading wheel. Its function is to classify the particle size of the dispersed material, discharge the fine particles that meet the requirements in a timely manner, and return the coarse particles that do not meet the requirements to continue dispersing.

[0118] In this scheme, based on the characteristic that graphite anode materials are prone to agglomeration and clumping after graphitization, an integrated rod and pin dispersing device is used to pre-disperse the graphitized anode material to ensure the uniformity of subsequent slurry coating on the powder.

[0119] In addition, based on the viscous properties of the slurry, compressed air is used to spray the slurry liquid into the negative electrode powder at high speed and uniformly, which effectively improves the uniformity of solid-liquid mixing.

[0120] The jetting device is installed horizontally in the pipeline to ensure the atomization effect of the slurry. At the same time, it is consistent with the flow direction of the material to fully contact the material and improve uniformity.

[0121] In this scheme, a controller is configured to coordinate the control of the feeder, disperser, ejector, negative pressure fan, pulse controller, and airlock.

[0122] The jetting device is equipped with automatic one-button start. During the operation of the negative pressure vortex blower, any abnormalities such as pipe blockage or valve closure can be effectively detected and immediately triggered. The jetting device will stop spraying and an alarm will be sound, preventing product quality problems such as uneven mixing and coating caused by blockage or operational errors.

[0123] In this solution, the controller can be configured to have functions such as one-button start, negative pressure detection, automatic blockage removal, and interlocking control. The controller can be a PLC, and the PLC can be configured with an HMI (human-machine interface).

[0124] In this solution, the controller can be specifically configured as follows:

[0125] When the operator presses the one-button start, the negative pressure fan is activated first to provide a negative pressure environment for the system, ensuring that materials can be conveyed normally. Simultaneously with the start of the negative pressure fan, the airlock and pulse device are activated.

[0126] During system operation, an air pressure gauge (range 0 to -100 kPa) monitors the negative pressure in the vacuum feeder pipeline in real time. When the pipeline becomes clogged, the negative pressure will remain below the set value. If this situation persists for a preset time interval (e.g., 5 to 10 seconds), the air pressure gauge will send a signal back to the PLC.

[0127] Upon receiving the signal, the PLC controller preemptively shuts off the ejector, stopping slurry delivery and preventing further blockage. It then opens the air supply valve to replenish air and clear the blockage. Replenishing air increases the pressure within the pipeline, helping to clear the blockage and restore the system to normal operation. Finally, the alarm system is triggered, issuing an alarm notification via the HMI interface to alert operators to the system malfunction.

[0128] In the event of a common blockage in the feed line, the controller will automatically open the deblocking valve to replenish air and clear the blockage. During the deblocking process, the system will continue to maintain the normal operation of other equipment to ensure continuous production.

[0129] If the system detects a fault in the airlock or the fan ball valve, the PLC controller will automatically take the following measures:

[0130] Stop the operation of the ejector, negative pressure fan, and pulse device to prevent the fault from escalating and protect equipment safety. Issue an alarm notification through the HMI interface, clearly indicating the faulty equipment to facilitate quick location and repair by operators.

[0131] In this solution, the ejector needs to meet certain conditions to be activated. The controller will determine the activation based on the operating status of equipment such as the negative pressure fan and the normal material conveying. Only when the negative pressure fan is operating normally and the material is being conveyed normally will the controller synchronously activate the ejector to ensure that the slurry can be smoothly mixed with the material, thereby improving production quality.

[0132] When the operator presses the button to shut down the ejector, the controller will automatically shut down other feeding equipment first, including airlocks and pulse devices. This coordinated shutdown method ensures the safety and stability of the system during shutdown, preventing material residue and equipment damage.

[0133] In this scheme, the PLC's Q0.1 to Q0.6 ports can be connected to the control terminals of the relays respectively, thereby realizing the closing control of the normally open contacts of the corresponding relays. When the normally open contacts corresponding to Q0.1 to Q0.6 are closed, the corresponding electrical contacts KA01 to KA06 are closed.

[0134] In this scheme, ports Q0.1 to Q0.6 can be used to control the start and stop of the jet injector, the plugging valve, the pulse device, the negative pressure fan, the airlock, and the de-energizer, respectively.

[0135] In this solution, the PLC's IO.1 to IO.4 ports can be connected to the control terminals of the switches respectively. IO.1 to IO.4 can be configured to control the start-up of the air pressure gauge, feeder, negative pressure fan, and air shut-off device respectively.

[0136] The electrical contact KA-D of the air pressure gauge 3 is located in the control circuit. When the electrical contact KA-D is open, the negative pressure fan, pulse controller, air shut-off valve, and the pneumatic valve corresponding to the closed air shut-off valve are shut off.

[0137] In this scheme, the air pressure gauge 3 is connected to the power line through a transformer.

[0138] In this scheme, the pneumatic valve is set to be driven by compressed air, and the air pressure gauge 3 is set to measure the pressure of compressed air. When the measured value of the air pressure gauge is greater than the preset (positive) pressure, it is considered that the valve core of the pneumatic valve or the vacuum feeder is blocked or damaged. At this time, the electrical contact KA-D is disconnected.

[0139] When the electrical contact KA-D is disconnected, the PLC controller de-energizes the relays of the negative pressure fan, airlock, etc., thereby shutting down the negative pressure fan, airlock, and pneumatic valve.

[0140] This solution integrates the ejector, feeder, and controller into a single structure, significantly reducing processing costs and space requirements. It enables one-time mixing and feeding of solid and liquid materials under various conditions. The system also includes a dispersant, which simultaneously functions as a classifier, ensuring uniform particle size of the powder materials, guaranteeing the coating effect of the slurry, and improving product qualification rate.

[0141] The jet injector and feeder are linked. The slurry will be automatically sprayed only when the feed is detected to be normal. The slurry spraying time and interval can be set according to the powder material conveying speed.

[0142] When the negative pressure fan is started, the air shut-off device and pulse device will be activated first to prevent abnormalities such as filter blockage. If the negative pressure value exceeds the standard due to material blockage during operation, the air pressure gauge will send a signal to the PLC, and the PLC will shut down the ejector in advance and perform air replenishment and blockage removal, and trigger an alarm.

[0143] The system is equipped with interlocking and linkage control. After one-button start-up, any abnormality will trigger a shutdown or alarm. For ordinary material blockages, the system will automatically intervene to clear the blockage without affecting normal operation. If the airlock or pneumatic ball valve malfunctions, the system will also automatically stop the ejector, negative pressure fan, and pulse device, and will issue an alarm via the HMI.

[0144] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A negative electrode material feeding system, characterized in that, include: Ejector, feeder, and controller; The ejector is mechanically connected to the feed pipe of the vacuum feeder, and the ejector is communicatively connected to the controller; The jet injector is used to deliver slurry into the feed pipeline; The feeder is mechanically connected to the feed pipeline, and the feeder is communicatively connected to the controller; The feeder is used to deliver solid material into the feed pipeline; The controller is configured to control the start or stop of the jet injector and the start or stop of the feeder.

2. The negative material feeding system of claim 1, wherein, The jet ejector includes an air inlet, a slurry suction inlet, and a jet outlet; The air inlet is used to connect to compressed air, the slurry suction port is used to connect to the slurry, and the injection port is used to mechanically connect to the feed pipeline; The jet injector uses compressed air to deliver the slurry into the feed pipe.

3. The negative material feeding system of claim 2, wherein, The injection port is located on the horizontal feed pipe. 4.The negative material feeding system of claim 1, wherein, It also includes a dispersing machine; The dispersing machine is installed on the feed pipe and is mechanically connected to the feed pipe. The dispersing machine is used to disperse the solid material input into the feed pipe, and the dispersed solid material and the slurry are mixed in the feed pipe. 5.The negative material feeding system of claim 1, wherein, It also includes a drain valve; The unblocking valve is located at the discharge port of the feeder and is mechanically connected to the feed pipeline. The unblocking valve is also communicatively connected to the controller. The controller is also configured to control the opening or closing of the unblocking valve. 6.The negative material feeding system of claim 1, wherein, It also includes control circuitry; The controller is connected to the control circuit, and the control circuit is electrically connected to the jet injector and the feeder; The controller is also configured to control the start or stop of the jet injector and feeder via the control circuit. 7.The negative material feeding system of claim 1, wherein, The feeder is equipped with a dust collection port at its feed inlet. 8.The negative material feeding system of claim 1, wherein, It also includes an air supply valve; The air replenishment valve is installed on the feed pipe and is mechanically connected to the feed pipe. The air replenishment valve is also communicatively connected to the controller. The controller is also configured to activate the air replenishment valve when the pressure of the vacuum feeder is less than a preset threshold. 9.The negative material feeding system of claim 6, wherein, It also includes air pressure gauges; The electrical contacts of the air pressure gauge are located in the control circuit. When the electrical contacts are open, the negative pressure fan, pulse controller, and air shut-off device corresponding to the vacuum feeder are turned off.

10. The negative electrode material feeding system as described in claim 9, characterized in that, The airlock is equipped with a pneumatic valve; The air pressure gauge is used to measure the pressure of the gas driving the pneumatic valve. The air pressure gauge is configured to disconnect the electrical contact when the measured pressure value is greater than a preset pressure.

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