Feeding system, material filling method and battery manufacturing equipment

Abstract

This application discloses a feeding system, a material filling method, and battery manufacturing equipment. The feeding system includes a storage tank, a circulation pipeline, a circulation pump, a dispensing device, a first flow meter, and a second flow meter. The storage tank has a storage cavity for containing material, and the storage tank is provided with a circulation inlet and a circulation outlet communicating with the storage cavity. The two ends of the circulation pipeline are respectively connected to the circulation inlet and the circulation outlet, and the circulation pump is connected to the circulation pipeline. The dispensing device includes a dispensing pipe and a control component. The dispensing pipe is connected to the circulation pipeline, and the control component is located on the dispensing pipe. The circulation pipeline includes a discharge pipe and a return pipe. The two ends of the discharge pipe are respectively connected to the circulation outlet and the dispensing device. The first flow meter is located on the discharge pipe. The two ends of the return pipe are respectively connected to the dispensing device and the circulation inlet, and the second flow meter is located on the return pipe. The technical solution of this application can improve the accuracy of material filling control during battery manufacturing.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to a feeding system, a material feeding method, and battery manufacturing equipment. Background Technology

[0002] Batteries are widely used in various electronic devices, such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy airplanes, electric toy ships, power tools, and energy storage systems, etc.

[0003] Improving the accuracy of material loading control during battery manufacturing is also one of the research issues in this field. Summary of the Invention

[0004] In view of the above problems, this application provides a feeding system, a material feeding method, and a battery manufacturing equipment, which can improve the accuracy of material feeding control during the battery manufacturing process.

[0005] In a first aspect, this application provides a feeding system, including a storage tank, a circulation pipeline, a circulation pump, a distributing device, a first flow meter, and a second flow meter. The storage tank has a storage cavity for containing material, and the storage tank is provided with a circulation inlet and a circulation outlet communicating with the storage cavity. The two ends of the circulation pipeline are respectively connected to the circulation inlet and the circulation outlet, and the circulation pump is connected to the circulation pipeline. The distributing device includes a distributing pipe and a control component; the distributing pipe is connected to the circulation pipeline, and the control component is located on the distributing pipe. The circulation pipeline includes a discharge pipe and a return pipe; the two ends of the discharge pipe are respectively connected to the circulation outlet and the distributing device; the first flow meter is located on the discharge pipe; the two ends of the return pipe are respectively connected to the distributing device and the circulation inlet; and the second flow meter is located on the return pipe.

[0006] In the technical solution of this application embodiment, a storage tank is provided to hold the material, offering a stable environment for material storage and distribution, and reducing contamination of the material by external impurities. A circulation pipeline is provided to discharge gas from the circulation pipeline after maintenance, thereby eliminating the influence of air bubbles on the first and second flow meters. Simultaneously, the circulation pipeline transports the material from the storage tank to the distribution device, and various control and monitoring devices can be installed on the circulation pipeline, improving the stability and control accuracy of the material feeding process. The distribution device is used to distribute the material into a distribution tank or a mixer. The control components can control the flow and disconnection of material in the distribution pipe, achieving precise control of the feeding amount. In particular, by setting up the first and second flow meters, the amount of material flowing into the distribution pipe from the circulation pipeline can be accurately obtained, improving the accuracy of the feeding process.

[0007] In some embodiments, the first flow meter and the second flow meter are both mass flow meters. Mass flow meters offer high accuracy and rapid response, improving the control precision of the feeding process.

[0008] In some embodiments, the feeding system further includes a shock-absorbing device disposed on the circulation pipeline, the shock-absorbing device being connected between the circulation outlet and the first flow meter. In the above structure, by providing a shock-absorbing device, the impact on the first flow meter during the start-up of the circulation pump is effectively reduced, thereby improving the metering accuracy of the first flow meter.

[0009] In some embodiments, the storage tank is also provided with an exhaust port communicating with the storage chamber. By providing an exhaust port, air in the circulation pipe can be discharged, allowing the material to flow more smoothly in the circulation pipe and improving the efficiency of the material distribution process.

[0010] In some embodiments, there are multiple dispensing devices, which are connected in parallel to the circulation pipeline. In the above structure, by setting multiple dispensing devices, after one dispensing device completes dispensing, it is possible to quickly switch to the next dispensing device for dispensing, saving time in the assembly and transfer process of the dispensing pipe device and improving the efficiency of dispensing.

[0011] In some embodiments, a pressure-activated device is also provided on the circulation pipeline, which can be activated when the pressure in the circulation pipeline exceeds a threshold. In the above structure, by providing a pressure-activated device, the pressure of the material in the circulation pipeline can be increased, and the material can only flow back into the storage tank after the pressure reaches a certain level, thereby improving the efficiency of the material distribution process and the accuracy of metering.

[0012] In some embodiments, the pressure-activated device is disposed between the second flow meter and the circulation inlet. Distributing the pressure-activated device between the second flow meter and the circulation inlet can improve the efficiency of material circulation and the metering accuracy of the second flow meter.

[0013] In some embodiments, the pressure-activated device includes a first back pressure valve, a first shut-off valve, and a second shut-off valve. The first back pressure valve is connected to the circulation pipeline, and the first shut-off valve is connected to the circulation pipeline, with the first shut-off valve located upstream of the first back pressure valve. The second shut-off valve is connected to the circulation pipeline, with the second shut-off valve located downstream of the first back pressure valve. In the above structure, by setting the first back pressure valve, material can only flow into the storage tank under a certain pressure, and can only flow into the storage tank and cannot flow out of the storage tank, thus improving the stability of the material distribution process. The first and second shut-off valves can shut off sequentially, improving the metering accuracy of the second flow meter.

[0014] In some embodiments, the control assembly includes a second back pressure valve, a third shut-off valve, and a fourth shut-off valve. The second back pressure valve is connected to the distribution pipe, the third shut-off valve is connected to the distribution pipe and is located upstream of the back pressure valve, and the fourth shut-off valve is connected to the distribution pipe and is located downstream of the back pressure valve. In the above structure, by setting the second back pressure valve, the material can only flow out of the distribution pipe and cannot flow back, thus improving the accuracy of the material distribution process. The third and fourth shut-off valves further improve the accuracy of material quantity control during the distribution process.

[0015] In some embodiments, the feeding system further includes a monitoring device, which includes a first pressure gauge mounted on the storage tank, and / or a level gauge mounted on the storage tank. In the above structure, by setting up a detection device to monitor the pressure of the storage tank during the material distribution process, accidents such as tank rupture caused by excessive pressure are reduced. Installing a level gauge on the storage tank to add material in real time improves the efficiency of the material distribution process.

[0016] In some embodiments, the monitoring device further includes a second pressure gauge installed on the circulation pipeline. In the above structure, by installing a second pressure gauge to detect the pressure in the circulation pipeline, the risk of pipeline rupture due to excessive pressure is reduced.

[0017] Secondly, this application provides a battery manufacturing apparatus, which includes the feeding system described in the above embodiments.

[0018] Thirdly, this application provides a material filling method, which uses the feeding system in the above embodiments to fill materials. The material filling method includes adding materials to a storage tank. Controlling the material in the storage tank to enter a circulation pipeline. Activating a control component to connect a distribution pipe to the circulation pipeline to inject materials from the circulation pipeline into the distribution pipe. Reading the reading M1 of the first flow meter and the reading M2 of the second flow meter on the circulation pipeline to obtain the amount M of material entering the distribution pipe. Monitoring the value of M during the filling process; when M reaches a preset filling amount, disconnecting the distribution pipe from the circulation pipeline to complete the material filling.

[0019] The above technical solution, by installing a first flow meter and a second flow meter at the outlet of the storage tank and in the loop of the circulation pipeline respectively, and installing a back pressure valve after the circulation loop flow meter, ensures that the space between the two flow meters is always filled with incompressible material. Therefore, the difference between the first and second flow meters is the amount of material flowing to the distribution pipe, achieving accurate material metering. This technical solution can replace the method of installing a ground scale under the storage tank and improves the control accuracy of material distribution and filling.

[0020] In some embodiments, controlling the material in the storage tank to enter the circulation pipeline includes connecting the storage tank to the circulation pipeline and turning on the circulation pump on the circulation pipeline to inject the material into the circulation pipeline. The vent on the storage tank is then opened to discharge the gas in the circulation pipeline. The above technical solution reduces the impact of air bubbles on the metering accuracy of the first and second flow meters by discharging the gas in the circulation pipeline.

[0021] In some embodiments, controlling the material in the storage tank to enter the circulation pipeline further includes: detecting a pressure-activated device on the circulation pipeline; after the pressure-activated device is activated, the material continues to circulate in the circulation pipeline for a flow time T of 10s ≤ T ≤ 50s. In the above technical solution, after the pressure-activated device is activated and the circulation continues for a period of time, it proves that the material in the circulation pipeline is full and the gas has been discharged. At this time, the first flow meter and the second flow meter begin to measure, and the difference between the two is the amount of material entering the distribution pipe. The above steps improve the accuracy and speed of flow control in the distribution pipe.

[0022] In some embodiments, reading the reading M1 of the first flow meter and the reading M2 of the second flow meter on the circulation pipeline to obtain the amount of material M entering the distribution pipe includes: after the material injection into the circulation pipeline is completed, resetting the readings of the first and second flow meters to zero; starting to monitor the values ​​of M1 and M2; and calculating M according to M=M1-M2. The above technical solution, after the circulation pipeline is full of material and the readings of the first and second flow meters have stabilized, begins the distribution process, improving the accuracy of the injection volume control.

[0023] In some embodiments, monitoring the value of M during the dispensing process, and disconnecting the receiving device from the circulation pipeline when M reaches the preset dispensing amount of the dispensing device, completing the material dispensing includes: when M reaches 98% of the preset dispensing amount, sequentially shutting off the third and fourth shut-off valves of the control component; turning off the circulation pump; and turning off the pressure-starting device. In the above technical solution, shutting off when the dispensing amount reaches 98% of the preset value reduces the risk of over-dispensing material, and considering the delayed closing of the shut-off valves, further improves the control accuracy of the dispensing process.

[0024] In some embodiments, the material filling method further includes, after the material filling of the first distribution pipe is completed, activating the control component to connect the second distribution pipe to the circulation pipeline, so as to inject material from the circulation pipeline into the second distribution pipe. The readings M3 of the first flow meter and M4 of the second flow meter on the circulation pipeline are read to obtain the amount of material M' entering the second distribution pipe. The value of M' is monitored during the filling process; when M' reaches the preset filling amount, the connection between the second distribution pipe and the circulation pipeline is disconnected, completing the material filling of the second distribution pipe. The above technical solution, after completing the filling of the first distribution pipe, can quickly switch to the filling of the other distribution pipe, improving the efficiency of material filling.

[0025] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0026] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of a feeding system provided in some embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the structure of a feeding system provided in other embodiments of this application;

[0029] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0030] Figure 4 for Figure 2 A magnified structural diagram of part B in the middle section;

[0031] Figure 5 This is a flowchart of a material filling method in some embodiments of this application;

[0032] Figure 6 This is a flowchart of a material filling method in some other embodiments of this application;

[0033] Figure 7 This is a flowchart of a material filling method in some other embodiments of this application;

[0034] Figure 8 This is a flowchart of a material filling method in some other embodiments of this application;

[0035] Figure 9 This is a flowchart of a material filling method in some other embodiments of this application;

[0036] Figure 10 This is a flowchart of a material filling method in some other embodiments of this application;

[0037] Figure 11 This is a flowchart of a material filling method in some other embodiments of this application;

[0038] Figure 12 This is a flowchart of a material filling method in some other embodiments of this application.

[0039] Detailed Explanation of Reference Numerals

[0040] 1. Feeding system; 101. Storage tank; 102. Circulation pipeline; 103. Circulation pump; 104. Distributor; 105. First flow meter; 106. Second flow meter; 107. Storage chamber; 108. Circulation inlet; 109. Circulation outlet; 110. Distributor pipe; 111. Control components; 112. Discharge pipe; 113. Return pipe; 114. Shock absorption device; 115. Vent; 116. Pressure start device; 117. First back pressure valve; 118. First shut-off valve; 119. Second shut-off valve; 120. Manual control valve; 121. Second back pressure valve; 122. Third shut-off valve; 123. Fourth shut-off valve; 124. First pressure gauge; 125. Remote level gauge; 126. Remote pressure gauge; 127. Second pressure gauge. Detailed Implementation

[0041] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0046] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0047] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0049] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0050] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0051] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 85°-95°, the two directions can be considered perpendicular; if the angle between two directions is 0°-5°, the two directions can be considered parallel.

[0052] In this application, "multiple" means two or more (including two).

[0053] In the manufacturing process of battery cells, precise metering of materials is typically required to improve the cell's performance. For example, in the manufacturing of electrode components for a battery cell, liquid solvents are added to the active material and stirred to form an active material slurry, which is then coated onto a current collector to form the electrode sheet. The amount of solvent added needs to be precisely controlled to improve the film-forming performance of the active material slurry on the current collector. Related technologies use weighing methods to measure the amount of solvent added, typically employing floor scales and connecting hoses. However, floor scales have limited measurement accuracy and cannot meet the standard requirement for precise solvent addition to the active material slurry. Furthermore, connecting hoses are prone to rupture during use, causing material leakage.

[0054] To address the aforementioned problems, embodiments of this application provide a feeding system. A storage tank is provided to hold the material, offering a stable environment for storage and reducing contamination from external impurities. A circulation pipeline is included to drain gas after maintenance, eliminating the influence of air bubbles on the first and second flow meters. Simultaneously, the circulation pipeline transports material from the storage tank to a distribution device, and various control and monitoring devices are installed on the pipeline, improving the stability of the feeding process and the accuracy of the feeding amount. The distribution device distributes the material into a distribution tank or a mixer. Control components control the flow and disconnection of material in the distribution pipe, achieving precise control of the feeding amount. In particular, by using the first and second flow meters, the amount of material flowing into the distribution pipe from the circulation pipeline can be accurately obtained, improving the accuracy of the feeding process.

[0055] The feeding system provided in this application can be applied not only in the manufacturing process of battery cells, but also in other industrial manufacturing fields requiring precise measurement. For example, this feeding system can be widely used in industries such as chemical, pharmaceutical, and food processing to achieve precise material filling and dispensing. This device plays a particularly important role in scenarios requiring strict control over the amount and quality of materials added.

[0056] Please refer to the reference. Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of a feeding system provided in some embodiments of this application. Figure 2 This is a schematic diagram of the structure of a feeding system provided in other embodiments of this application. Figure 3 for Figure 2 A magnified structural diagram of part A in the middle. Figure 4 for Figure 2 A magnified structural diagram of part B.

[0057] As shown in the figure, the feeding system 1 provided in this embodiment includes a storage tank 101, a circulation pipeline 102, a circulation pump 103, a dispensing device 104, a first flow meter 105, and a second flow meter 106. The storage tank 101 has a storage cavity 107 for containing materials, and the storage tank 101 is provided with a circulation inlet 108 and a circulation outlet 109 communicating with the storage cavity 107. The two ends of the circulation pipeline 102 are respectively connected to the circulation inlet 108 and the circulation outlet 109, and the circulation pump 103 is connected to the circulation pipeline 102. The dispensing device 104 includes a dispensing pipe 110 and a control component 111. The dispensing pipe 110 is connected to the circulation pipeline 102, and the control component 111 is disposed on the dispensing pipe 110. The circulation pipeline 102 includes a discharge pipe 112 and a return pipe 113. The two ends of the discharge pipe 112 are respectively connected to the circulation outlet 109 and the material distribution device 104. A first flow meter 105 is installed in the discharge pipe 112. The two ends of the return pipe 113 are respectively connected to the material distribution device 104 and the circulation inlet 108. A second flow meter 106 is installed in the return pipe 113.

[0058] The storage chamber 107 of the storage tank 101 is a sealed chamber to reduce the impact of external impurities on the material in the storage tank 101. A feed inlet may be provided on the storage tank 101 to promptly add material into it. Optionally, the storage tank 101 also includes a stirring device disposed in the storage chamber 107, which is used to stir the material in the storage chamber 107 to reduce the probability of sedimentation or stratification.

[0059] Optionally, the storage tank 101 is also equipped with a remote level gauge 125, which can transmit the monitored level information of the storage tank 101 via wireless communication. This structure allows for timely replenishment of materials in the storage tank 101.

[0060] Optionally, the storage tank 101 is also equipped with a remote pressure gauge 126, which can remotely monitor the pressure in the storage tank 101 in real time and improve the stability of the material filling process.

[0061] The circulation pipeline 102 can be a pipe connecting the circulation inlet 108, the distribution pipe 110, and the circulation outlet 109 of the storage tank 101. Optionally, the circulation pipeline 102 can use a high-strength rigid pipe to reduce the risk of pipeline rupture, and the position and structure of the circulation pipeline 102 can be fixed to improve the stability of the circulation process and the stability of the injection direction of the distribution pipe 110.

[0062] The first flow meter 105 and the second flow meter 106 are used to calculate and display the amount of material flowing through the flow meter. Optionally, the first flow meter 105 and the second flow meter 106 are typically of the same type of flow meter to improve the efficiency of the filling amount calculation. For example, the first flow meter 105 and the second flow meter 106 may be a volumetric dosing meter, an electromagnetic flow meter, a turbine flow meter, an oval gear flow meter, etc.

[0063] The discharge pipe 112 is used to convey material from the storage tank 101 to the distribution device 104, and the return pipe 113 is used to return excess material from the distribution device 104 back to the storage tank 101. For example, the first flow meter 105 can measure the amount of material flowing out of the storage tank 101, while the second flow meter 106 can measure the amount of material returning to the storage tank 101. The difference between the two is the amount of material flowing into the distribution device 104.

[0064] In the technical solution of this application embodiment, a storage tank 101 is provided to accommodate materials, providing a stable environment for material storage and distribution, and reducing the contamination of materials by external impurities. A circulation pipeline 102 is provided to discharge gas from the circulation pipeline 102 after maintenance, thereby eliminating the influence of air bubbles on the first flow meter 105 and the second flow meter 106. Simultaneously, the circulation pipeline 102 can transport materials from the storage tank 101 to the distribution device 104, and various control and monitoring devices can be installed on the circulation pipeline 102 to improve the stability and control accuracy of the material feeding process. The distribution device 104 is used to distribute materials into a distribution tank or a mixer. The control component 111 can control the flow and disconnection of materials in the distribution pipe 110, achieving precise control of the feeding amount. In particular, by providing the first flow meter 105 and the second flow meter 106, the amount of material flowing into the distribution pipe 110 from the circulation pipeline 102 can be accurately obtained, improving the accuracy of the feeding process.

[0065] In some embodiments of this application, the first flow meter 105 is a mass flow meter, and the second flow meter 106 is a mass flow meter.

[0066] A mass flow meter is a flow measurement instrument that operates based on the Coriolis force principle or other related principles (such as thermal or electromagnetic). It can directly measure the mass flow rate of a fluid, unaffected by changes in fluid temperature, pressure, and density. Therefore, mass flow meters can accurately measure the flow rate of materials.

[0067] By using a mass flow meter, the amount of material flowing into the distribution pipe 110 from the circulation pipe 102 can be accurately measured, thereby achieving precise control of the feeding process. This helps reduce errors and improve product quality and production efficiency. The real-time flow data provided by the mass flow meter enables precise control of the feeding amount.

[0068] In some embodiments of this application, the feeding system 1 further includes a shock-absorbing device 114 disposed on the circulation pipeline 102, the shock-absorbing device 114 being connected between the circulation outlet 109 and the first flow meter 105.

[0069] At the moment the circulating pump 103 is turned on, the flow rate and pressure in the circulating pipeline 102 fluctuate significantly. This fluctuation will impact the first flow meter 105 and reduce the accuracy of the first flow meter 105.

[0070] When the circulating pump 103 starts or stops, the sudden acceleration or deceleration of the fluid generates a significant impact force in the circulating pipeline 102. The vibration damping device 114 effectively absorbs these impact forces, preventing them from damaging the first flow meter 105 or affecting its measurement accuracy. The operation of the circulating pump 103 generates continuous vibrations. If these vibrations are directly transmitted to the flow meter, they may cause loosening or wear of the internal mechanical components of the flow meter, thereby affecting its measurement performance. The vibration damping device 114 isolates these vibrations, protecting the flow meter from their effects.

[0071] For example, the shock absorption device 114 may be a pulsation damper, a rubber shock absorber, a spring shock absorber, or a hydraulic shock absorber, etc.

[0072] Connecting the shock-absorbing device 114 between the circulation outlet 109 and the first flow meter 105 can significantly reduce the impact and vibration on the first flow meter 105 during the start-up or operation of the circulation pump 103, thereby further improving the metering accuracy of the flow meter and the overall stability of the system.

[0073] In some embodiments of this application, the storage tank 101 is also provided with an exhaust port 115 communicating with the storage cavity 107.

[0074] Optionally, the vent 115 is located at the highest point of the storage chamber 107 or the highest point of the circulation pipe 102 to effectively discharge accumulated air. An exhaust pipe and a control valve can be connected to the vent 115.

[0075] During the feeding process of storage tank 101, timely venting is necessary to ensure pressure balance. The presence of air in the circulation pipeline 102 can obstruct material flow and even create airlocks, affecting the efficiency of the feeding process. Storage chamber 107 is connected to circulation pipeline 102. By providing vent holes 115 on storage tank 101, air in storage chamber 107 and circulation pipeline 102 can be effectively expelled, ensuring smooth material flow within the pipeline. Air bubbles formed in the material not only affect material flow but may also interfere with the flow meter's measurement accuracy. The vent holes 115 help reduce bubble formation, thereby improving the accuracy and reliability of the flow meter. Air accumulation in the pipeline can cause material blockage, affecting the normal operation of the system. The vent holes 115 help prevent this, keeping the pipeline unobstructed.

[0076] like Figure 2 As shown, in some embodiments of this application, there are multiple dispensing devices 104, which are connected in parallel to the circulation pipeline 102. For example, the number of dispensing devices 104 can be 2, 4, or 8.

[0077] By setting up multiple material distribution devices 104, the system can quickly switch to the next material distribution device 104 after the previous one has completed its distribution task, without waiting for the assembly and transfer of the material distribution pipe 110. This parallel operation greatly shortens the material distribution cycle and improves the overall material distribution efficiency. The parallel use of multiple material distribution devices 104 makes the production process more flexible and efficient. Traditional material distribution methods may require frequent assembly and transfer of the material distribution pipe 110, which is not only time-consuming and labor-intensive but may also increase the risk of operational errors. The parallel design of multiple material distribution devices 104 avoids this problem because all material distribution devices 104 are pre-installed and ready, requiring only simple switching.

[0078] The parallel use of multiple material distribution devices 104 can also improve the reliability of the system. Even if one of the material distribution devices 104 fails, the system can quickly switch to other normal material distribution devices 104 to ensure the continuity and stability of production.

[0079] The system can dynamically adjust the working status of each dispensing device 104 according to actual needs to achieve optimal production efficiency and resource utilization. For example, the solvent dispensing process of active substances is divided into multiple stages, so it can be switched between multiple dispensing pipes 110 to improve the efficiency of material dispensing and dispensing.

[0080] In some embodiments of this application, the circulation pipeline 102 is further provided with a pressure-activated device 116, which can be activated when the pressure in the circulation pipeline 102 is greater than a threshold.

[0081] Optionally, the threshold of the pressure-activated device 116 should be set reasonably according to the characteristics of the material and the material distribution requirements. If the threshold is too low, the material pressure may be insufficient, affecting the material distribution effect. If the threshold is too high, it may increase system energy consumption and wear.

[0082] Optionally, the pressure-activated device 116 can be integrated with the system's control system to achieve automated control and remote monitoring. This helps to monitor the pressure status of the circulation pipeline 102 in real time and make automatic adjustments as needed. Necessary safety protection measures, such as pressure sensors and safety valves, should be provided for the pressure-activated device 116 to ensure timely action in case of equipment failure or abnormalities, protecting the safety of personnel and equipment.

[0083] The pressure-activated device 116 refers to a device that can be activated when the pressure in the circulation pipeline 102 reaches or exceeds a set threshold, allowing the material in the circulation pipeline 102 to pass through the pressure-activated device 116 and continue to circulate. This pressure regulation mechanism helps ensure that the material maintains sufficient pressure during conveying and distributing, avoiding problems such as poor material flow or uneven distribution caused by insufficient pressure.

[0084] By setting the pressure-starting device 116, the system can adjust the pressure in the circulation pipe according to actual needs, thereby optimizing the material distribution process. When the pressure reaches the set value, the material can flow more smoothly into the material distribution device 104, improving the efficiency and accuracy of material distribution.

[0085] The use of the pressure-activated device 116 also helps improve the accuracy of metering. When the material pressure is stable and sufficient, the measurement error of the flow meter will be relatively small, thereby improving the accuracy of metering. This is especially important in applications requiring precise control of the feed rate.

[0086] The pressure-activated device 116 can automatically adjust the pressure in the circulation pipe, enabling the system to maintain stable operation under various working conditions. This helps reduce system failures and downtime caused by pressure fluctuations, improving the reliability and stability of the system.

[0087] In the above structure, by setting the pressure-opening device 116, the pressure of the material in the circulation pipe can be increased. Only after the material pressure reaches a certain strength can it flow back into the storage tank 101, thereby improving the efficiency of the material distribution process and the accuracy of the metering.

[0088] In some embodiments of this application, the pressure-activated device 116 is located between the second flow meter 106 and the circulation inlet 108.

[0089] When a rapid start-up or adjustment of the material circulation speed is required, the pressure start device 116 can quickly respond to the control signal and adjust to the required pressure state, thereby shortening the time for the system to reach a stable operating state.

[0090] The operating principle of a flow meter is often affected by fluid pressure. When the fluid pressure is stable, the measurement error of the flow meter will be significantly reduced. The pressure-activated device 116 provides a more accurate measurement environment for the second flow meter 106 by maintaining a stable inlet pressure. Fluid disturbances in the pipeline (such as eddies, turbulence, etc.) can affect the flow meter readings. The pressure-activated device 116 reduces these disturbance factors by optimizing the fluid flow path and velocity distribution, thereby improving the measurement accuracy of the second flow meter 106.

[0091] By placing the pressure-activated device 116 between the second flow meter 106 and the circulation inlet 108, the efficiency of material circulation and the metering accuracy of the second flow meter 106 can be improved.

[0092] In some embodiments of this application, the pressure-activated device 116 includes a first back pressure valve 117, a first shut-off valve 118, and a second shut-off valve 119. The first back pressure valve 117 is connected to the circulation line 102, the first shut-off valve 118 is connected to the circulation line 102, and the first shut-off valve 118 is located upstream of the first back pressure valve 117. The second shut-off valve 119 is connected to the circulation line 102, and the second shut-off valve 119 is located downstream of the first back pressure valve 117.

[0093] Back pressure valves typically have unidirectional flow characteristics, meaning material can only flow in from one end and out from the other. The first back pressure valve 117 helps prevent material backflow, further improving the stability of the material distribution process. The main function of the back pressure valve is to maintain pressure stability in the pipeline system; the first back pressure valve 117 ensures that the material reaches a certain pressure condition before flowing into the storage tank 101. This pressure control is crucial to ensuring that the material flows stably and orderly back to the storage tank 101 through the circulation pipeline 102.

[0094] The primary function of the first shut-off valve 118 is to quickly and completely close the pipeline to isolate part or all of the system. The first shut-off valve 118 is used to cut off the flow of material to the back pressure valve when necessary, thereby protecting the back pressure valve and downstream equipment from unnecessary pressure shocks or material leakage.

[0095] The second shut-off valve 119 is also used to shut off the pipeline. However, its main function here is to ensure that the material does not leak or flow back unexpectedly from downstream of the back pressure valve during the metering process, thereby ensuring the metering accuracy of the second flow meter 106.

[0096] During the feeding process, precise control of material flow can be achieved by sequentially shutting off the first shut-off valve 118 and the second shut-off valve 119. Firstly, closing the first shut-off valve 118 isolates the upstream system, reducing the impact of upstream pressure fluctuations on the flow meter. Then, closing the second shut-off valve 119 ensures that material will not leak or flow back during metering, thereby improving the metering accuracy of the second flow meter 106.

[0097] In the above process, by setting the first back pressure valve 117, the material can only flow into the storage tank 101 under a certain pressure, and can only flow into the storage tank 101 and cannot flow out of the storage tank 101, thus improving the stability of the material distribution process. The first shut-off valve 118 and the second shut-off valve 119 can shut off sequentially, improving the metering accuracy of the second flow meter 106.

[0098] In some alternative embodiments, a manual control valve 120 is also provided on the circulation pipeline 102. For example, the manual control valve 120 is located upstream of the second flow meter 106 and between the pressure-activated device 116 and the circulation inlet 108. By providing the manual control valve 120, the material flow within the circulation pipeline 102 can be promptly cut off in case of unforeseen circumstances.

[0099] In some embodiments of this application, the control component 111 includes a second back pressure valve 121, a third shut-off valve 122, and a fourth shut-off valve 123. The second back pressure valve 121 is connected to the distribution pipe 110, the third shut-off valve 122 is connected to the distribution pipe 110, and the third shut-off valve 122 is located upstream of the back pressure valve. The fourth shut-off valve 123 is connected to the distribution pipe 110, and the fourth shut-off valve 123 is located downstream of the back pressure valve.

[0100] The main function of the second back pressure valve 121 is to maintain stable pressure in the distribution pipe 110 and ensure that the material can only flow in one direction, that is, flow out of the distribution pipe 110 and cannot flow back. This unidirectional flow characteristic helps to prevent material mixing or contamination during the distribution process, thereby improving the accuracy of distribution.

[0101] The primary function of the third shut-off valve 122 is to quickly and completely close the pipeline to isolate a portion of the system. Here, the third shut-off valve 122 is used to cut off the flow of material to the second back pressure valve 121 when necessary. This helps prevent unnecessary material from flowing into the distribution pipe 110 before or after the distribution process begins, thereby ensuring precise control of the distribution process.

[0102] Similar to the third shut-off valve 122, the fourth shut-off valve 123 is also used to shut off the pipeline. However, its main function here is to ensure that during the dispensing process, material does not accidentally leak or flow back from downstream of the back pressure valve into the dispensing pipe 110. This helps maintain the purity of the material in the dispensing pipe 110 and the accuracy of dispensing.

[0103] In the above structure, the unidirectional flow characteristic of the second back pressure valve 121 ensures that material can only flow out of the distribution pipe 110 and cannot flow back. This helps prevent material mixing during the distribution process. Precise control of the opening and closing of the third shut-off valve 122 and the fourth shut-off valve 123 allows for precise control of the material flow path. This helps to isolate the distribution pipe 110 before distribution begins, preventing premature material inflow; and to promptly cut off material flow after distribution ends, preventing leakage or backflow. This precise control is crucial for ensuring the accuracy and efficiency of the distribution process.

[0104] In some alternative embodiments, a manual control valve 120 is also provided on the distribution pipe 110. For example, the manual control valve 120 is located upstream of the third shut-off valve 122 and downstream of the pressure-activated device 116 and the fourth shut-off valve 123. By providing the manual control valve 120, the material flow within the distribution pipe 110 can be promptly cut off in case of unexpected situations.

[0105] like Figure 4 As shown, in some embodiments of this application, the feeding system 1 further includes a monitoring device, which includes a first pressure gauge 124 disposed on the storage tank 101, and / or a remote liquid level gauge 125 disposed on the storage tank 101.

[0106] The first pressure gauge 124 is used to monitor pressure changes inside the storage tank 101 in real time. During the material distribution process, the pressure inside the storage tank 101 may gradually decrease as the material decreases. Alternatively, during the process of adding material to the storage tank 101, the pressure inside the storage tank 101 may gradually increase. By setting the first pressure gauge 124, abnormal pressure conditions can be detected and controlled in a timely manner, thereby avoiding safety accidents such as tank rupture caused by excessively low or high pressure.

[0107] The remote level gauge 125 is used to monitor the changes in the material level in the storage tank 101 in real time. By reading the data from the remote level gauge 125, the amount of material stored in the storage tank 101 can be accurately determined, thereby achieving precise control over the material quantity. This helps to adjust the speed in a timely manner during the material distribution and feeding processes, ensuring the accuracy and efficiency of material distribution and feeding.

[0108] In the above technical solution, a detection device is installed to monitor the pressure of the storage tank 101 during the material distribution process, reducing the risk of accidents such as tank rupture caused by excessive pressure. A remote level gauge 125 is installed on the storage tank 101 to increase the material quantity in real time, thereby improving the efficiency of the material distribution process.

[0109] In some alternative embodiments, the storage tank 101 is also equipped with a remote pressure gauge 126. The remote pressure gauge 126 can transmit information from the storage tank 101 via wireless signals, improving the convenience and real-time performance of the pressure detection process.

[0110] like Figure 2 As shown, in some embodiments of this application, the monitoring device further includes a second pressure gauge 127 disposed on the circulation pipeline 102.

[0111] During the operation of the feeding system 1, the pressure within the circulation pipeline 102 may fluctuate due to factors such as material flow and temperature changes. Excessive pressure can cause undue stress on the pipeline, increasing the risk of ruptures, leaks, and other safety incidents. By installing a second pressure gauge 127, abnormal pressure conditions can be detected and warned of in a timely manner. If the pressure exceeds the preset safe range, operators can immediately take measures to adjust it, such as reducing the feeding rate or opening bypass valves, to alleviate pipeline pressure and reduce the risk of rupture.

[0112] like Figures 2 to 4As shown, in some optional embodiments, the feeding system 1 includes: a storage tank 101, a circulation pipeline 102, a circulation pump 103, a distributing device 104, a first flow meter 105, and a second flow meter 106. The storage tank 101 has a storage cavity 107 for containing material, and the storage tank 101 is provided with a circulation inlet 108 and a circulation outlet 109 communicating with the storage cavity 107. The two ends of the circulation pipeline 102 are respectively connected to the circulation inlet 108 and the circulation outlet 109, and the circulation pump 103 is connected to the circulation pipeline 102. The distributing device 104 includes a distributing pipe 110 and a control component 111. The distributing pipe 110 is connected to the circulation pipeline 102, and the control component 111 is disposed on the distributing pipe 110. The first flow meter 105 is disposed on the circulation pipeline 102, and the first flow meter 105 is located between the circulation outlet 109 and the distributing pipe 110. The second flow meter 106 is connected to the circulation pipeline 102 and is located between the distribution pipe 110 and the circulation inlet 108. The first flow meter 105 and the second flow meter 106 are both mass flow meters. The feeding system 1 also includes a shock-absorbing device 114 located on the circulation pipeline 102, which is connected between the circulation outlet 109 and the first flow meter 105. The storage tank 101 is also provided with an exhaust port 115 communicating with the storage chamber 107. There are multiple distribution devices 104, which are connected in parallel to the circulation pipeline 102. The circulation pipeline 102 is also provided with a pressure-activated device 116, which can be opened when the pressure in the circulation pipeline 102 is greater than a threshold. The pressure-activated device 116 is located between the second flow meter 106 and the circulation inlet 108. The pressure-activated device 116 includes a first back pressure valve 117, a first shut-off valve 118, and a second shut-off valve 119. A first back pressure valve 117 is connected to the circulation pipeline 102, and a first shut-off valve 118 is connected to the circulation pipeline 102, with the first shut-off valve 118 located upstream of the first back pressure valve 117. A second shut-off valve 119 is connected to the circulation pipeline 102, with the second shut-off valve 119 located downstream of the first back pressure valve 117. The control assembly 111 includes a second back pressure valve 121, a third shut-off valve 122, and a fourth shut-off valve 123. The second back pressure valve 121 is connected to the distribution pipe 110, and the third shut-off valve 122 is connected to the distribution pipe 110, with the third shut-off valve 122 located upstream of the back pressure valve. The fourth shut-off valve 123 is connected to the distribution pipe 110, with the fourth shut-off valve 123 located downstream of the back pressure valve.

[0113] This application provides a battery manufacturing apparatus, including the feeding system 1 described in the above embodiments. In this battery manufacturing apparatus, the feeding system 1 is used to manufacture an active material slurry. A storage tank 101 is provided to contain the solvent in the active material slurry, providing a stable environment for solvent storage and distribution, and reducing external impurities from contaminating the solvent. A circulation pipeline 102 is provided to discharge gas from the circulation pipeline 102 after maintenance, thereby eliminating the influence of air bubbles on the first flow meter 105 and the second flow meter 106. Simultaneously, the circulation pipeline 102 can transport the solvent from the storage tank 101 to the distribution device 104, which can be connected to a mixer to mix and fuse the solvent with the active material powder. Various control and monitoring devices can also be installed on the circulation pipeline 102, improving the stability and control accuracy of the solvent feeding process. The distribution device 104 is used to dispense the solvent into the mixer. A control component 111 can control the flow and disconnection of materials in the distribution pipe 110, achieving precise control of the feeding amount. In particular, by setting the first flow meter 105 and the second flow meter 106, the amount of material flowing into the distribution pipe 110 in the circulation pipe 102 can be accurately obtained, which improves the accuracy of the solvent feeding process.

[0114] like Figure 5 As shown, embodiments of this application also provide a material filling method, which uses the feeding system 1 in the above embodiments to fill materials. The material filling method includes:

[0115] S1. Add material to storage tank 101;

[0116] S2. Control the material in the storage tank 101 to enter the circulation pipeline 102;

[0117] S3. Start control component 111 connects the distribution pipe 110 to the circulation pipe 102 to inject material from the circulation pipe 102 into the distribution pipe 110.

[0118] S4. Read the reading M1 of the first flow meter 105 and the reading M2 of the second flow meter 106 on the circulation pipeline 102 to obtain the amount of material M entering the distribution pipe 110.

[0119] S5. Monitor the value of M during the filling process. When M reaches the preset filling amount, disconnect the connection between the material distribution pipe 110 and the circulation pipe 102 to complete the material filling.

[0120] Step S1 is the initial step for material filling, ensuring that there is sufficient material in storage tank 101 for subsequent filling. It is understood that this step can be omitted if the storage tank 101 already contains the corresponding material.

[0121] Step S2 involves adjusting relevant valves or pumps and other control components 111 to smoothly and orderly introduce the material in the storage tank 101 into the circulation pipeline 102, thereby improving the continuity and stability of the material during the filling process.

[0122] Step S3: When the circulation pipeline 102 is full of material and reaches a stable state, the control component 111 is activated to connect the distribution pipe 110 to the circulation pipeline 102. This step is a key start-up step to achieve accurate material filling.

[0123] Step S4 involves installing a first flow meter 105 and a second flow meter 106 on the circulation pipeline 102. By reading the readings M1 and M2 of these two flow meters, the amount of material M entering the distribution pipe 110 can be calculated. For example, assuming that the area between the first flow meter 105 and the second flow meter 106 is always filled with incompressible material, M = M1 - M2. This step ensures accurate measurement of the material dispensed.

[0124] Step S5 involves real-time monitoring of the value of M during the material filling process. When M reaches the preset filling amount, the connection between the distribution pipe 110 and the circulation pipe 102 is immediately cut off to complete the material filling. This step ensures the accuracy and timeliness of the material filling amount.

[0125] The above-described technical solution, by installing a first flow meter 105 and a second flow meter 106 at the outlet of the storage tank 101 and in the loop of the circulation pipeline 102 respectively, and installing a back pressure valve after the circulation loop flow meter, ensures that the space between the two flow meters is always filled with incompressible material. Therefore, the difference between the first flow meter 105 and the second flow meter 106 is the amount of material flowing to the distribution pipe 110, thus achieving accurate material metering. This technical solution can replace the method of installing a floor scale under the storage tank 101 and improves the control accuracy of material distribution and filling.

[0126] like Figure 6 As shown, in some embodiments of this application, step S2 includes:

[0127] S201. Connect the storage tank 101 to the circulation pipeline 102;

[0128] S202, Turn on the circulation pump 103 on the circulation pipeline 102 to inject material into the circulation pipeline 102;

[0129] S203. Open the vent 115 on the storage tank 101 to discharge the gas in the circulation pipeline 102.

[0130] The circulating pump 103 is a key piece of equipment that drives the flow of materials in the circulating pipeline 102. When the circulating pump 103 is turned on, the material is drawn into the pump and propelled into the circulating pipeline 102. This step ensures the continuous flow of materials in the circulating pipeline 102.

[0131] Before the material enters the circulation pipeline 102, residual gas may exist in the storage tank 101 and the circulation pipeline 102. If this gas is not discharged in time, it may form bubbles during the material flow, thus affecting the measurement accuracy of the flow meter. Therefore, it is necessary to open the vent 115 on the storage tank 101 to discharge the gas in the circulation pipeline 102. By discharging the gas in the circulation pipeline 102, the impact of bubbles on the measurement accuracy of the first flow meter 105 and the second flow meter 106 can be reduced. This helps to ensure accurate measurement of the material dispensing amount and improves the accuracy and reliability of the dispensing process. The presence of gas in the circulation pipeline 102 not only affects the measurement accuracy of the flow meter but may also negatively impact the stability and operating efficiency of the system. Therefore, timely gas discharge helps to optimize the performance of the entire feeding system 1.

[0132] The above-mentioned technical solution reduces the impact of air bubbles on the measurement accuracy of the first flow meter 105 and the second flow meter 106 by discharging the gas in the circulation pipeline 102.

[0133] like Figure 7 As shown, in some embodiments of this application, step S2 further includes:

[0134] S204. Detect the pressure-opening device 116 on the circulation pipeline 102. After the pressure-opening device 116 is opened, the material continues to circulate in the circulation pipeline 102. The flow time T is: 10s≤T≤50s.

[0135] When the pressure-activated device 116 detects that the material in the circulation pipe 102 is full and the gas has been discharged, it will keep the material circulating in the circulation pipe 102 for a period of time T (10s ≤ T ≤ 50s). The purpose of this step is to further ensure that the material in the circulation pipe 102 is fully mixed and that there are no residual air bubbles. After the pressure-activated device 116 keeps the material circulating for time T, the first flow meter 105 and the second flow meter 106 begin metering. At this time, the difference between the two is the amount of material entering the distribution pipe 110.

[0136] By introducing the concepts of pressure-activated device 116 and flow time T, the material state within the circulation pipeline 102 can be determined more accurately, thereby ensuring the metering accuracy of the flow meter. Metering and dispensing can be initiated only after confirming that the circulation pipeline 102 is full and free of air bubbles, significantly improving the accuracy and speed of flow control in the dispensing pipe 110. Ensuring thorough mixing and the absence of air bubbles within the circulation pipeline 102 reduces system fluctuations and instability, thus enhancing the overall stability of the feeding system 1.

[0137] In the above-described technical solution, after the pressure-starting device 116 is activated and the circulation continues for a period of time, it is confirmed that the material in the circulation pipe 102 is full and the gas has been discharged. At this time, the first flow meter 105 and the second flow meter 106 begin to measure, and the difference between the two is the amount of material entering the distribution pipe 110. The above steps improve the accuracy and speed of flow control in the distribution pipe 110.

[0138] like Figure 8 As shown, in some embodiments of this application, step S4 includes:

[0139] S401. After the material is injected into the circulation pipeline 102, the readings of the first flow meter 105 and the second flow meter 106 are reset to zero.

[0140] S402. Start monitoring the values ​​of M1 and M2, and calculate M according to M=M1-M2.

[0141] After the material injection into the circulation pipeline 102 is completed, the entire circulation pipeline 102 is now full of material. To ensure the accuracy of subsequent flow meter readings, the readings of the first flow meter 105 and the second flow meter 106 need to be zeroed. The purpose of this step is to eliminate any accumulated errors that may have existed previously, providing an accurate starting point for subsequent real-time monitoring and calculations.

[0142] After the zeroing operation is completed, the system enters the real-time monitoring phase. At this time, the system needs to monitor the readings of the first flow meter 105 and the second flow meter 106 in real time, and calculate the M value according to the formula M=M1-M2, where the M value represents the amount of material entering the distribution pipe 110. By monitoring and calculating the M value in real time, the system can accurately control the distribution amount, ensuring the accuracy and stability of the filling process.

[0143] During the circulation process within the circulation pipeline 102, before the material distribution begins, M1 and M2 should be equal after the system is reset. This means that the amount of material entering the circulation pipeline 102 from the storage tank 101 is equal to the amount of material returning to the storage tank 101 from the circulation pipeline 102.

[0144] When the material distribution begins, a portion of the material M1 flowing out of the storage tank 101 flows out through the distribution pipe 110 and then through the circulation pipe 102. The material that returns to the storage tank 101 through the circulation pipe 102 is M2. Therefore, M = M1 - M2.

[0145] The above-mentioned technical solution allows for material distribution only after the circulating pipeline 102 is filled with material and the readings of the first flow meter 105 and the second flow meter 106 have stabilized, thus improving the accuracy of the filling volume control.

[0146] like Figure 9 As shown, in some optional embodiments, step S4 includes:

[0147] S401A. After the material is injected into the circulation pipeline 102, calculate the amount of material M0 = M1 - M2 that enters the circulation pipeline 102 from the storage tank 101.

[0148] S402A monitors the values ​​of M1 and M2 in real time, and calculates M based on M=M1-M2-M0.

[0149] The above calculation method takes into account the amount of material in the circulation pipeline 102, which improves the accuracy of M calculation.

[0150] like Figure 10 As shown, in some embodiments of this application, step S5 includes:

[0151] S501. When M reaches 98% of the preset injection volume, the third shut-off valve 122 and the fourth shut-off valve 123 of the control assembly 111 are shut off in sequence.

[0152] S502, shut down circulation pump 103;

[0153] S503, Close the pressure-starting device 116.

[0154] When the real-time monitored M value (i.e., the amount of material entering the distribution pipe 110) reaches 98% of the preset filling amount, the system first performs a cut-off operation. In this step, the system will sequentially cut off the third cut-off valve 122 and the fourth cut-off valve 123 in the control component 111, that is, cut off the third cut-off valve 122 first and then cut off the fourth cut-off valve 123, so as to effectively prevent more material from entering when the filling amount is close to the preset value, thereby reducing the risk of overfilling.

[0155] After the shut-off valve is closed, the system continues to shut down the circulation pump 103. The circulation pump 103 plays a crucial role in the material filling process, responsible for drawing material from the storage tank 101 and injecting it into the circulation pipeline 102. Shutting down the circulation pump 103 ensures that no new material is drawn into the system after the filling amount reaches the preset value, thereby further consolidating the precise control of the filling amount.

[0156] Finally, the system performs the operation of shutting down the pressure-starting device 116. The pressure-starting device 116 may be used during the material filling process to provide the necessary pressure or start signal to ensure smooth material injection. Shutting down the pressure-starting device 116 marks the formal end of the filling process and ensures that the system is in a safe and stable state after filling is completed.

[0157] The aforementioned technical solution effectively reduces the risk of overfilling by precisely controlling the filling amount and promptly cutting off the material supply when it approaches a preset value. Furthermore, considering the potential delay in the closure of the shut-off valve, the solution performs the shut-off operation in advance, further improving the control precision of the filling process. This precise control not only helps avoid material waste and contamination but also ensures the stability and reliability of the filling process, thereby improving overall production efficiency.

[0158] like Figure 11 As shown, in some embodiments of this application, the material filling method further includes step S6, which includes:

[0159] S601. After the material is added to the first distribution pipe 110, the control component 111 is started to connect the second distribution pipe 110 to the circulation pipe 102 so as to inject the material from the circulation pipe 102 into the second distribution pipe 110.

[0160] S602, Read the reading M3 of the first flow meter 105 and the reading M4 of the second flow meter 106 on the circulation pipeline 102 to obtain the amount of material M' entering the second distribution pipe 110;

[0161] S603. Monitor the value of M' during the filling process. When M' reaches the preset filling amount, disconnect the connection between the second distribution pipe 110 and the circulation pipe 102 to complete the material filling of the second distribution pipe 110.

[0162] It is understood that there is no connection order or sequential relationship between the first distribution pipe 110 and the second distribution pipe 110; the first distribution pipe 110 and the second distribution pipe 110 are connected in parallel on the circulation pipe 102. The names of the first distribution pipe 110 and the second distribution pipe 110 are for the purpose of distinguishing the two distribution pipes 110 and facilitating explanation.

[0163] After the material filling is completed in the first distribution pipe 110, the system activates the control component 111 to connect the second distribution pipe 110 to the circulation pipe 102. This step ensures that the material can be smoothly injected from the circulation pipe 102 into the second distribution pipe 110, preparing for the subsequent filling process.

[0164] After the switch is completed, the system immediately reads the readings of the first flow meter 105 (referred to as M3 at this time, used to monitor the material flow rate entering the second distribution pipe 110) and the second flow meter 106 (referred to as M4 at this time, possibly used to monitor the flow rate of other parts in the circulation pipe 102, but in this scenario, the focus is mainly on M3) on the circulation pipe 102. By the difference between these two readings or the individual reading of M3 (if M4 is not directly involved in the calculation at this stage), the system can obtain the amount of material M' entering the second distribution pipe 110.

[0165] During the filling process, the system continuously monitors the value of M'. When M' reaches the preset filling amount, the system immediately disconnects the connection between the second distribution pipe 110 and the circulation pipe 102, thereby completing the material filling of the second distribution pipe 110. This step ensures precise control of the filling amount and avoids material waste and contamination.

[0166] like Figure 12 As shown, in some optional embodiments, step S602 includes:

[0167] S602A: Zero the readings of the first flow meter 105 and the second flow meter 106;

[0168] S602B: Monitor the value of M' in real time and calculate M' based on M'=M3-M4.

[0169] In the above technical solution, by zeroing the first flow meter 105 and the second flow meter 106, the metering accuracy of the material entering the second distribution pipe 110 is improved.

[0170] In some alternative embodiments, step S602 includes:

[0171] S602a: Real-time monitoring of the M' value, and calculation of M' based on M'=M3-M4-M0-M. The above technical solution considers the material quantity in the circulation pipe 102 and the material quantity entering the first distribution pipe 110, accurately calculating the material quantity entering the second distribution pipe 110. This technical solution, by rapidly switching the connection of the distribution pipes 110, enables the immediate commencement of the second distribution pipe 110 filling process after the first distribution pipe 110 is filled. This design not only improves the efficiency of material filling but also helps reduce waiting time and production costs. Simultaneously, precise control of the filling amount ensures the stability and reliability of the filling process.

[0172] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A feeding system, characterized in that, include: A storage tank having a storage cavity for containing materials, the storage tank having a circulation inlet and a circulation outlet communicating with the storage cavity; The circulation pipeline is connected at both ends to the circulation inlet and the circulation outlet, respectively. A circulation pump is connected to the circulation pipeline; The material dispensing device includes a material dispensing pipe and a control component. The material dispensing pipe is connected to the circulation pipeline, and the control component is located on the material dispensing pipe. First flow meter; Second flow meter; The circulation pipeline includes a discharge pipe and a return pipe. The two ends of the discharge pipe are connected to the circulation outlet and the material distribution device, respectively. A first flow meter is installed in the discharge pipe. The two ends of the return pipe are connected to the material distribution device and the circulation inlet, respectively. A second flow meter is installed in the return pipe. The first flow meter and the second flow meter are arranged in series along the closed loop of the circulation pipeline to detect the difference between the discharge flow rate and the return flow rate in the circulation pipeline to calculate the material distribution amount.

2. The feeding system according to claim 1, characterized in that, The first flow meter is a mass flow meter, and the second flow meter is a mass flow meter.

3. The feeding system according to claim 2, characterized in that, The feeding system also includes a shock-absorbing device installed on the circulation pipeline, which is connected between the circulation outlet and the first flow meter.

4. The feeding system according to claim 2, characterized in that, The storage tank is also provided with an exhaust port that communicates with the storage cavity.

5. The feeding system according to claim 2, characterized in that, The number of material dispensing devices is multiple, and the multiple material dispensing devices are connected in parallel to the circulation pipeline.

6. The feeding system according to any one of claims 1-5, characterized in that, The circulation pipeline is also equipped with a pressure-activated device, which can be activated when the pressure in the circulation pipeline exceeds a threshold.

7. The feeding system according to claim 6, characterized in that, The pressure-activated device is located between the second flow meter and the circulation inlet.

8. The feeding system according to claim 6, characterized in that, The pressure-activated device includes: The first back pressure valve is connected to the circulation pipeline; A first shut-off valve is connected to the circulation pipeline, and the first shut-off valve is located upstream of the first back pressure valve; A second shut-off valve is connected to the circulation pipeline and is located downstream of the first back pressure valve.

9. The feeding system according to claim 8, characterized in that, The control component includes: The second back pressure valve is connected to the distribution pipe; The third shut-off valve is connected to the distribution pipe and is located upstream of the back pressure valve; A fourth shut-off valve is connected to the feed pipe and is located downstream of the back pressure valve.

10. The feeding system according to any one of claims 1-5, characterized in that, The feeding system further includes a monitoring device, which includes a first pressure gauge installed on the storage tank, and / or the monitoring device includes a level gauge installed on the storage tank.

11. The feeding system according to claim 10, characterized in that, The monitoring device also includes a second pressure gauge installed on the circulation pipeline.

12. A battery manufacturing apparatus, characterized in that, Includes the feeding system as described in any one of claims 1-11.

13. A method for adding materials, characterized in that, The material is dispensed using the dispensing system as described in any one of claims 1-11, wherein the material dispensing method comprises: Add materials to the storage tank; Control the material in the storage tank to enter the circulation pipeline; The start control component connects the dispensing pipe to the circulation pipe to inject material from the circulation pipe into the dispensing pipe; Read the reading M1 of the first flow meter and the reading M2 of the second flow meter on the circulation pipeline to obtain the amount of material M entering the distribution pipe; The value of M is monitored during the filling process. When M reaches the preset filling amount, the connection between the material distribution pipe and the circulation pipe is cut off to complete the material filling.

14. The material filling method according to claim 13, characterized in that, The control of the material in the storage tank entering the circulation pipeline includes: Connect the storage tank to the circulation pipeline, and turn on the circulation pump on the circulation pipeline to inject the material into the circulation pipeline; Open the vent on the storage tank to discharge the gas in the circulation pipeline.

15. The material filling method according to claim 14, characterized in that, The method of controlling the material in the storage tank to enter the circulation pipeline also includes: detecting the pressure-opening device on the circulation pipeline, and after the pressure-opening device is opened, keeping the material to continue circulating in the circulation pipeline, with a flow time T of 10s≤T≤50s.

16. The material filling method according to claim 15, characterized in that, The step of reading the reading M1 of the first flow meter and the reading M2 of the second flow meter on the circulation pipeline to obtain the amount of material M entering the distribution pipe includes: After the material is injected into the circulation pipeline, the readings of the first flow meter and the second flow meter are reset to zero. Start monitoring the values ​​of M1 and M2, and calculate M according to M = M1 - M2.

17. The material filling method according to claim 15, characterized in that, The monitoring of the value of M during the dispensing process, when M reaches the preset dispensing amount of the dispensing device, disconnects the connection between the receiving device and the circulation pipeline, completing the material dispensing process, including: When M reaches 98% of the preset filling amount, the third and fourth shut-off valves of the control component are shut off in sequence. Turn off the circulation pump; The pressure-activated device is shut off.

18. The material dispensing method according to any one of claims 13-17, characterized in that, The material filling method also includes: After the material is added to the first distribution pipe, the control component is activated to connect the second distribution pipe to the circulation pipeline so that the material is injected from the circulation pipeline into the second distribution pipe. Read the reading M3 of the first flow meter and the reading M4 of the second flow meter on the circulation pipeline to obtain the amount of material M' entering the second distribution pipe; The value of M' is monitored during the filling process. When M' reaches the preset filling amount, the connection between the second material distribution pipe and the circulation pipeline is cut off, and the material filling of the second material distribution pipe is completed.

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