Charging system, material filling method and battery manufacturing equipment

Abstract

The invention discloses a feeding system, a material filling method and battery manufacturing equipment. The feeding system comprises a material storage tank, a circulating pipeline, a circulating pump, a material distributing device, a first flow meter and a second flow meter. The material storage tank is provided with a material storage cavity used for containing materials, and a circulation inlet and a circulation outlet which are communicated with the material storage cavity are formed in the material storage tank. The two ends of the circulation pipeline are connected to the circulation inlet and the circulation outlet respectively, and the circulation pump is connected to the circulation pipeline. The material distributing device comprises a material distributing pipe and a control assembly, the material distributing pipe is connected to the circulating pipeline, and the control assembly is arranged on the material distributing pipe. Wherein the circulating pipeline comprises a discharging pipe and a material returning pipe, the two ends of the discharging pipe are connected with the circulating outlet and the material distributing device respectively, the first flow meter is arranged on the discharging pipe, the two ends of the material returning pipe are connected with the material distributing device and the circulating inlet respectively, and the second flow meter is arranged on the material returning pipe. According to the technical scheme, the control accuracy of the material filling amount in the battery manufacturing process can be improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a feeding system, a material filling method and a battery manufacturing device. Background Art

[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] How to improve the accuracy of material filling amount 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, the present application provides a feeding system, a material filling method and a battery manufacturing equipment, which can improve the accuracy of controlling the material filling amount during the battery manufacturing process.

[0005] In the first aspect, the present 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 accommodating materials, and the storage tank is provided with a circulation inlet and a circulation outlet connected to 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 arranged on the distributing pipe. Among them, 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 arranged 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 arranged on the return pipe.

[0006] In the technical solution of the embodiment of the present application, a storage tank is provided to contain materials, so as to provide a stable environment for the storage and distribution of materials and reduce the pollution of materials by external impurities. The provided circulation pipeline can be used to discharge the gas in the circulation pipeline after maintenance, thereby eliminating the influence of bubbles on the first flow meter and the second flow meter. At the same time, the circulation pipeline can transport materials from the storage tank to the distribution device, and various control devices and monitoring devices can also be provided on the circulation pipeline, thereby improving the stability of the material feeding process and the accuracy of control. The distribution device is used to distribute materials into the distribution tank or the mixer. The control component can control the circulation and disconnection of materials in the distribution pipe, so as to realize accurate control of the feeding amount. In particular, by providing the first flow meter and the second flow meter, the amount of material flowing into the distribution pipe in the circulation pipeline can be accurately obtained, thereby improving the accuracy of the feeding process.

[0007] In some embodiments, the first flow meter is a mass flow meter, and the second flow meter is a mass flow meter. The mass flow meter has high accuracy and sensitive response, which improves the control accuracy of the feeding process.

[0008] In some embodiments, the feeding system further comprises a shock absorbing device arranged on the circulation pipeline, and the shock absorbing device is connected between the circulation outlet and the first flow meter. In the above structure, by arranging the shock absorbing device, the impact on the first flow meter during the startup of the circulation pump is effectively reduced, and the measurement accuracy of the first flow meter is improved.

[0009] In some embodiments, the storage tank is further provided with an exhaust hole connected to the storage cavity. The exhaust hole can be provided to exhaust the air in the circulation pipe, so that the material flows more smoothly in the circulation pipeline, thereby improving the efficiency of the material distribution process.

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

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

[0012] In some embodiments, the pressure-initiating device is disposed between the second flow meter and the circulation inlet. Placing the pressure-initiating 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 cut-off valve, and a second cut-off valve. The first back-pressure valve is connected to the circulation pipeline, the first cut-off valve is connected to the circulation pipeline, and the first cut-off valve is located upstream of the first back-pressure valve. The second cut-off valve is connected to the circulation pipeline, and the second cut-off valve is located downstream of the first back-pressure valve. In the above structure, by setting the first back-pressure valve, the 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, thereby improving the stability of the material distribution process. The first cut-off valve and the second cut-off valve can be cut off successively, thereby improving the metering accuracy of the second flowmeter.

[0014] In some embodiments, the control assembly includes a second back pressure valve, a third cut-off valve, and a fourth cut-off valve. The second back pressure valve is connected to the material distribution pipe, the third cut-off valve is connected to the material distribution pipe, and the third cut-off valve is located upstream of the back pressure valve. The fourth cut-off valve is connected to the material distribution pipe, and the fourth cut-off valve 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 material distribution pipe and cannot flow back, thereby improving the accuracy of the material distribution process. The third cut-off valve and the fourth cut-off valve are set to improve the accuracy of material quantity control in the material distribution process.

[0015] In some embodiments, the feeding system further includes a monitoring device, the monitoring device includes a first pressure gauge provided on the storage tank, and / or the monitoring device includes a liquid level gauge provided on the storage tank. In the above structure, the pressure of the storage tank during the material distribution process is detected by providing a detection device to reduce accidents such as tank rupture caused by excessive pressure. The liquid level gauge is provided on the storage tank to increase the material quantity in real time, thereby improving the efficiency of the material distribution process.

[0016] In some embodiments, the monitoring device further comprises a second pressure gauge disposed on the circulation pipeline. In the above structure, the pressure of the circulation pipeline is detected by arranging the second pressure gauge to reduce the risk of pipeline rupture caused by excessive pressure.

[0017] In a second aspect, the present application provides a battery manufacturing device, which includes the feeding system in the above embodiment.

[0018] In a third aspect, the present application provides a material filling method, which uses the filling system in the above embodiment to fill materials, and the material filling method includes adding materials to a storage tank. Control the material in the storage tank to enter the circulation pipeline. Start the control component to connect the distribution pipe with the circulation pipeline to inject the material from the circulation pipeline into the distribution pipe. Read the reading M1 of the first flow meter on the circulation pipeline and the reading M2 of the second flow meter to obtain the amount M of material entering the distribution pipe. Monitor the value of M during the filling process. When M reaches the preset filling amount, cut off the connection between the distribution pipe and the circulation pipeline to complete the material filling.

[0019] The above technical solution, by respectively setting a first flow meter and a second flow meter at the outlet of the storage tank and the loop of the circulation pipeline, and setting a back pressure valve after the circulation loop flow meter, ensures that the space between the two flow meters is always filled with incompressible materials. Therefore, the difference between the first flow meter and the second flow meter is the amount of material flowing to the distribution pipe, achieving accurate material measurement. The above technical solution can replace the method of setting a floor 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. Opening the exhaust hole on the storage tank to discharge the gas in the circulation pipeline. The above technical solution reduces the influence of bubbles on the metering accuracy of the first flowmeter and the second flowmeter by discharging the gas in the circulation pipeline.

[0021] In some embodiments, controlling the material in the storage tank to enter the circulation pipeline also includes: detecting the pressure-activated device on the circulation pipeline, and maintaining the material to continue to circulate in the circulation pipeline after the pressure-activated device is turned on, and the flow time T is: 10s≤T≤50s. In the above technical solution, the pressure-activated device is turned on and then circulates for a period of time, proving that the material in the circulation pipeline has been filled and the gas has been discharged. At this time, the first flow meter and the second flow meter start measuring, and the difference between the two is the amount of material entering the distribution pipe. The above steps improve the accuracy and speed of the flow control of 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 injection of the material in the circulation pipeline is completed, the readings of the first flow meter and the second flow meter are cleared. Start monitoring the values ​​of M1 and M2, and calculate M according to M=M1-M2. In the above technical solution, the material distribution is started only after the circulation pipeline is full of materials and the readings of the first flow meter and the second flow meter are stable, thereby improving the control accuracy of the filling amount.

[0023] In some embodiments, the value of M during the filling process is monitored. When M reaches the preset filling amount of the dosing device, the connection between the material receiving device and the circulation pipeline is cut off. Completing the material filling includes: when M reaches 98% of the preset filling amount, the third shut-off valve and the fourth shut-off valve of the control component are cut off in sequence. Turn off the circulation pump. Turn off the pressure start device. In the above technical solution, it is closed when the filling amount reaches 98% of the preset value, reducing the risk of overfilling of the material. At the same time, considering the delay in closing the shut-off valve, the control accuracy of the feeding process is further improved.

[0024] In some embodiments, the material filling method further includes, after the material filling of the first distribution pipe is completed, starting the control component to connect the second distribution pipe with the circulation pipeline to inject the material from the circulation pipeline into the second distribution pipe. Read the reading M3 of the first flow meter on the circulation pipeline and the reading M4 of the second flow meter to obtain the amount of material M' entering the second distribution pipe. Monitor the value of M' during the filling process. When M' reaches the preset filling amount, cut off the connection between the second distribution pipe and the circulation pipeline to complete the material filling of the second distribution pipe. The above technical solution can quickly switch to the filling of another distribution pipe after completing the filling of the first distribution pipe, thereby improving the efficiency of material filling.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 1 A schematic diagram of the structure of a feeding system provided in some embodiments of the present application; Figure 2 A schematic diagram of the structure of a feeding system provided in some other embodiments of the present application; Figure 3 for Figure 2 A schematic diagram of the enlarged structure of part A; Figure 4 for Figure 2 A schematic diagram of the enlarged structure of part B; Figure 5 This is a flow chart of a material filling method in some embodiments of the present application; Figure 6 Flow chart of a material filling method in some other embodiments of the present application; Figure 7 Flow chart of a material filling method in some other embodiments of the present application; Figure 8 Flow chart of a material filling method in some other embodiments of the present application; Fig. 9 Flow chart of a material filling method in some other embodiments of the present application; Fig.10 Flow chart of a material filling method in some other embodiments of the present application; Fig.11 Flow chart of a material filling method in some other embodiments of the present application; Fig.12This is a flow chart of a material filling method in some other embodiments of the present application.

[0028] DETAILED DESCRIPTION OF REFERENCE NUMERALS 1. Feeding system; 101. Storage tank; 102. Circulation pipeline; 103. Circulation pump; 104. Distributing device; 105. First flow meter; 106. Second flow meter; 107. Storage chamber; 108. Circulation inlet; 109. Circulation outlet; 110. Distributing pipe; 111. Control component; 112. Discharging pipe; 113. Return pipe; 114. Shock absorber; 115. Exhaust hole; 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 DESCRIPTION

[0029] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0031] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0035] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0036] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0037] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0038] In the embodiments of the present application, the same reference numerals represent 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 the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0039] In the embodiments of the present application, "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "perpendicular" also includes not only the absolutely perpendicular situation, but also the roughly perpendicular situation conventionally recognized 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.

[0040] The term “plurality” used in this application refers to two or more (including two).

[0041] During the manufacturing process of battery cells, it is usually necessary to accurately measure the materials to improve the operating performance of the battery cells. For example, during the manufacturing process of the electrode assembly of the battery cell, it is necessary to add the liquid solvent to the active material and stir it to form an active material slurry, and then apply the active material slurry to the current collector to form an electrode pole piece. 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. In the related art, the amount of solvent added is measured by weighing, which usually uses a floor scale, a connecting hose, etc. The measurement accuracy of the floor scale is limited and cannot meet the standard requirements for accurate addition of solvent to the active material slurry. In addition, the connecting hose is prone to rupture during use, causing material leakage.

[0042] Based on the above problems, an embodiment of the present application provides a feeding system, in which a storage tank is provided to hold materials, so as to provide a stable environment for the storage of materials and reduce the pollution of materials by external impurities. The provided circulation pipeline can be used to discharge the gas in the circulation pipeline after maintenance, thereby eliminating the influence of bubbles on the first flow meter and the second flow meter. At the same time, the circulation pipeline can transport materials from the storage tank to the distributing device, and various control devices and monitoring devices can also be provided on the circulation pipeline, thereby improving the stability of the material feeding process and the control accuracy of the feeding amount. The distributing device is used to distribute materials into the distributing tank or the blender. The control component can control the circulation and disconnection of materials in the distributing pipe, so as to realize accurate control of the feeding amount. In particular, by providing the first flow meter and the second flow meter, the amount of material flowing into the distributing pipe in the circulation pipeline can be accurately obtained, thereby improving the accuracy of the feeding process.

[0043] The feeding system provided in the embodiment of the present application can be used not only in the manufacturing process of battery cells, but also in other industrial manufacturing fields that require precise measurement. For example, the feeding system can be widely used in the chemical, pharmaceutical, food and other industries to achieve accurate filling and packaging of materials. In particular, the device can play an important role in scenarios where the amount and quality of material filling need to be strictly controlled.

[0044] Please refer to Figures 1 to 4 , Figure 1This is a schematic diagram of the structure of the feeding system provided in some embodiments of the present application. Figure 2 This is a schematic diagram of the structure of the feeding system provided in some other embodiments of the present application. Figure 3 for Figure 2 The enlarged structural diagram of part A in the figure is as follows: Figure 4 for Figure 2 Schematic diagram of the enlarged structure of part B.

[0045] As shown in the figure, the feeding system 1 provided in the embodiment of the present application includes a storage tank 101, a circulation pipeline 102, a circulation pump 103, a material distribution device 104, a first flow meter 105 and a second flow meter 106. The storage tank 101 has a storage cavity 107 for accommodating materials, and the storage tank 101 is provided with a circulation inlet 108 and a circulation outlet 109 connected to 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 material distribution device 104 includes a material distribution pipe 110 and a control component 111, the material distribution pipe 110 is connected to the circulation pipeline 102, and the control component 111 is arranged on the material distribution pipe 110. Among them, 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, the first flow meter 105 is arranged on 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, and the second flow meter 106 is arranged on the return pipe 113.

[0046] The storage chamber 107 of the storage tank 101 is a closed chamber to reduce the impact of external impurities on the material in the storage tank 101. A feed port can be provided on the storage tank 101 to timely add materials to the storage tank 101. Optionally, the storage tank 101 also includes a stirring device provided in the storage chamber 107, and the stirring device is used to stir the material in the storage chamber 107 to reduce the probability of precipitation or stratification of the material.

[0047] Optionally, a remote level meter 125 is also provided on the storage tank 101, which can transmit the monitored level information of the storage tank 101 by wireless communication. The above structure can add materials in the storage tank 101 in time.

[0048] Optionally, the storage tank 101 is also provided with a remote pressure gauge 126, which can remotely monitor the pressure in the storage tank 101 in real time to improve the stability of the material filling process.

[0049] The circulation pipeline 102 may be a pipeline connected between the circulation inlet 108, the material distribution pipe 110 and the circulation outlet 109 of the storage tank 101. Optionally, the circulation pipeline 102 may use a hard pipeline with higher strength to reduce the risk of pipeline rupture, and the position and structure of the circulation pipeline 102 may be fixed to improve the stability of the circulation process and the stability of the injection direction of the material distribution pipe 110.

[0050] 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 usually the same type of flow meters to improve the calculation efficiency of the filling amount. Exemplarily, the first flow meter 105 and the second flow meter 106 can be a volume dosimeter, an electromagnetic flow meter, a turbine flow meter, an oval gear flow meter, etc.

[0051] The discharge pipe 112 is used to transport the material from the storage tank 101 to the material distribution device 104, and the return pipe 113 is used to return the excess material from the material distribution device 104 to the storage tank 101. Exemplarily, the first flow meter 105 can measure the amount of material flowing out of the storage tank 101, and the second flow meter 106 can measure the amount of material returning to the storage tank 101, and the difference between the two is the amount of material flowing into the material distribution device 104.

[0052] In the technical solution of the embodiment of the present application, a storage tank 101 is provided to accommodate materials, so as to provide a stable environment for the storage and distribution of materials and reduce the pollution of materials by external impurities. The circulating pipeline 102 provided can be used to discharge the gas in the circulating pipeline 102 after maintenance, so as to eliminate the influence of bubbles on the first flow meter 105 and the second flow meter 106. At the same time, the circulating pipeline 102 can transport materials from the storage tank 101 to the distribution device 104, and various control devices and monitoring devices can also be provided on the circulating pipeline 102 to improve the stability of the material feeding process and the accuracy of control. The distribution device 104 is used to distribute materials into the distribution tank or the mixer. The control component 111 can control the circulation and disconnection of materials in the distribution pipe 110, so as to realize accurate control of the feeding amount. In particular, by providing the first flow meter 105 and the second flow meter 106, the amount of materials flowing into the distribution pipe 110 in the circulating pipeline 102 can be accurately obtained, which improves the accuracy of the feeding process.

[0053] In some embodiments of the present application, the first flow meter 105 is a mass flow meter, and the second flow meter 106 is a mass flow meter.

[0054] A mass flow meter is a flow measurement instrument based on the Coriolis force principle or other related principles (such as thermal, electromagnetic, etc.). It can directly measure the mass flow of a fluid without being affected by changes in fluid temperature, pressure, and density. Therefore, a mass flow meter can accurately measure the flow of a material.

[0055] By using a mass flow meter, the amount of material flowing from the circulation pipeline 102 into the distribution pipe 110 can be accurately measured, thereby achieving accurate control of the feeding process. This helps to reduce errors and improve product quality and production efficiency. The real-time flow data provided by the mass flow meter has achieved accurate control of the feeding amount.

[0056] In some embodiments of the present application, the feeding system 1 further includes a shock absorbing device 114 disposed on the circulation pipeline 102 , and the shock absorbing device 114 is connected between the circulation outlet 109 and the first flow meter 105 .

[0057] At the moment when the circulation pump 103 is turned on, the flow rate and pressure in the circulation pipeline 102 fluctuate greatly. Such fluctuation will impact the first flow meter 105 and reduce the measurement accuracy of the first flow meter 105.

[0058] When the circulation pump 103 is started or stopped, a large impact force will be generated in the circulation pipeline 102 due to the sudden acceleration or deceleration of the fluid. The shock absorbing device 114 can effectively absorb these impact forces to prevent them from damaging the first flow meter 105 or affecting its metering accuracy. The operation of the circulation pump 103 will generate continuous vibrations. If these vibrations are directly transmitted to the flow meter, they may cause the mechanical parts inside the flow meter to loosen or wear, thereby affecting its measurement performance. The shock absorbing device 114 can isolate these vibrations and protect the flow meter from being affected by them.

[0059] Exemplarily, the shock absorbing device 114 may be a pulsation damper, a rubber shock absorber, a spring shock absorber, a hydraulic shock absorber, or the like.

[0060] 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 startup or operation of the circulation pump 103, thereby further improving the metering accuracy of the flow meter and the overall stability of the system.

[0061] In some embodiments of the present application, the storage tank 101 is further provided with an exhaust hole 115 communicating with the storage cavity 107 .

[0062] Optionally, the exhaust hole 115 is arranged at a high point of the material storage chamber 107 or a highest point of the circulation pipeline 102, so as to effectively exhaust the accumulated air. An exhaust pipe and a control valve can be connected to the exhaust hole 115.

[0063] During the feeding process of the storage tank 101, it is necessary to exhaust the gas in time to ensure the pressure balance of the storage tank 101. In the circulation pipeline 102, the presence of air may cause poor material flow, or even form an air lock, affecting the efficiency of the feeding process. The storage chamber 107 is connected to the circulation pipeline 102. By setting the exhaust hole 115 on the storage tank 101, the air in the storage chamber 107 and the circulation pipeline 102 can be effectively discharged to ensure the smooth flow of materials in the pipeline. The bubbles formed by the air in the material will not only affect the flow of the material, but also may interfere with the measurement accuracy of the flow meter. The setting of the exhaust hole 115 helps to reduce the generation of bubbles, thereby improving the accuracy and reliability of the flow meter. The accumulation of air in the pipeline may cause material blockage and affect the normal operation of the system. The setting of the exhaust hole 115 helps to prevent this from happening and keep the pipeline unobstructed.

[0064] like Figure 2 As shown, in some embodiments of the present application, there are multiple material distribution devices 104, and the multiple material distribution devices 104 are sequentially connected in parallel to the circulation pipeline 102. Exemplarily, the number of the material distribution devices 104 can be 2, 4 or 8.

[0065] By setting up multiple distributing devices 104, the system can quickly switch to the next distributing device 104 after one distributing device 104 completes the distributing task, without waiting for the assembly and transfer of the distributing tube 110. This parallel operation method greatly shortens the distributing cycle and improves the overall distributing efficiency. The parallel use of multiple distributing devices 104 makes the production process more flexible and efficient. The traditional distributing method may require frequent assembly and transfer of the distributing tube 110, which is not only time-consuming and labor-intensive, but may also increase the risk of operational errors. The design of multiple distributing devices 104 in parallel avoids this problem, because all the distributing devices 104 are pre-installed and ready, and only require a simple switch.

[0066] 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.

[0067] The system can dynamically adjust the working state of each material distribution device 104 according to actual needs to achieve optimal production efficiency and resource utilization. For example, the solvent filling process of the active substance is divided into multiple stages, so it can be switched among multiple material distribution pipes 110 to improve the material distribution and filling efficiency.

[0068] In some embodiments of the present application, a pressure-activated device 116 is further provided on the circulation pipeline 102 , and the pressure-activated device 116 can be opened when the pressure of the circulation pipeline 102 is greater than a threshold value.

[0069] Optionally, the threshold of the pressure-activated device 116 should be reasonably set according to the characteristics of the material and the material distribution requirements. A too low threshold may result in insufficient material pressure, affecting the material distribution effect. A too high threshold may increase system energy consumption and wear.

[0070] Optionally, the pressure-initiating device 116 is integrated with the control system of the system to realize automatic control and remote monitoring. This helps to monitor the pressure state of the circulation pipeline 102 in real time and automatically adjust it as needed. Necessary safety protection measures are set for the pressure-initiating device 116, such as pressure sensors, safety valves, etc., to ensure that timely measures can be taken to protect the safety of personnel and equipment in the event of equipment failure or abnormality.

[0071] The pressure-activated device 116 is a device that can be activated when the pressure in the circulation pipeline 102 reaches or exceeds a set threshold, so that the material in the circulation pipeline 102 passes through the pressure-activated device 116 and continues to circulate. This pressure regulation mechanism helps to ensure that the material maintains sufficient pressure during the conveying and distribution process, avoiding problems such as poor material flow or uneven distribution due to insufficient pressure.

[0072] 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 into the material distribution device 104 more smoothly, improving the efficiency and accuracy of material distribution.

[0073] The use of the pressure-activated device 116 also helps to 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 particularly important for occasions where the amount of material added needs to be accurately controlled.

[0074] The pressure-activated device 116 can automatically adjust the pressure in the circulation pipe so that the system can maintain stable operation under various working conditions, which helps to reduce system failures and downtime caused by pressure fluctuations and improve the reliability and stability of the system.

[0075] In the above structure, the pressure of the material in the circulation pipe can be increased by setting the pressure-starting device 116. The material can flow back into the storage tank 101 only after the pressure reaches a certain level, thereby improving the efficiency of the material distribution process and the accuracy of metering.

[0076] In some embodiments of the present application, the pressure-initiating device 116 is disposed between the second flow meter 106 and the circulation inlet 108 .

[0077] When rapid startup or adjustment of the material circulation speed is required, the pressure-starting device 116 can quickly respond to the control signal and adjust to the required pressure state, thereby shortening the time it takes for the system to reach a stable operating state.

[0078] The working principle of the flow meter is often affected by the 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.) will 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.

[0079] The pressure-initiating device 116 is arranged between the second flow meter 106 and the circulation inlet 108 , so as to improve the efficiency of material circulation and the measurement accuracy of the second flow meter 106 .

[0080] In some embodiments of the present application, the pressure-initiating device 116 includes a first back-pressure valve 117, a first cut-off valve 118, and a second cut-off valve 119. The first back-pressure valve 117 is connected to the circulation pipeline 102, the first cut-off valve 118 is connected to the circulation pipeline 102, and the first cut-off valve 118 is located upstream of the first back-pressure valve 117. The second cut-off valve 119 is connected to the circulation pipeline 102, and the second cut-off valve 119 is located downstream of the first back-pressure valve 117.

[0081] The back pressure valve usually has a one-way flow characteristic, that is, the material can only flow in from one end and out from the other end. The first back pressure valve 117 is set to help prevent the material from flowing back, further improving the stability of the material distribution process. The main function of the back pressure valve is to maintain the 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 the key to ensuring that the material returns to the storage tank 101 through the circulation pipeline 102 in a stable and orderly manner.

[0082] The main 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 passage of materials to the back pressure valve when necessary, thereby protecting the back pressure valve and downstream equipment from unnecessary pressure shocks or material leakage.

[0083] The second cut-off valve 119 is also used to cut off the pipeline. However, its main function here is to ensure that during the metering process, the material will not accidentally leak or flow back from the downstream of the back pressure valve, thereby ensuring the metering accuracy of the second flow meter 106.

[0084] During the feeding process, the material flow can be precisely controlled during the metering process by successively shutting off the first shut-off valve 118 and the second shut-off valve 119. Closing the first shut-off valve 118 first can isolate the upstream system and reduce the impact of upstream pressure fluctuations on the flowmeter. Closing the second shut-off valve 119 can then ensure that the material does not leak or flow back during metering, thereby improving the metering accuracy of the second flowmeter 106.

[0085] In the above process, by setting the first back pressure valve 117, the material can flow into the storage tank 101 only under a certain pressure, and can only flow into the storage tank 101 but cannot flow out of the storage tank 101, thereby improving the stability of the material distribution process. The first shut-off valve 118 and the second shut-off valve 119 can be shut off successively, thereby improving the measurement accuracy of the second flow meter 106.

[0086] In some optional embodiments, a manual control valve 120 is further provided on the circulation pipeline 102. Exemplarily, the manual control valve 120 is provided upstream of the second flow meter 106 and between the pressure-starting device 116 and the circulation inlet 108. By providing the manual control valve 120, the flow of materials in the circulation pipeline 102 can be cut off in time when an unexpected situation occurs.

[0087] In some embodiments of the present application, the control assembly 111 includes a second back pressure valve 121, a third cut-off valve 122, and a fourth cut-off valve 123. The second back pressure valve 121 is connected to the material distribution pipe 110, the third cut-off valve 122 is connected to the material distribution pipe 110, and the third cut-off valve 122 is located upstream of the back pressure valve. The fourth cut-off valve 123 is connected to the material distribution pipe 110, and the fourth cut-off valve 123 is located downstream of the back pressure valve.

[0088] The main function of the second back pressure valve 121 is to maintain the pressure in the material distribution pipe 110 stable and ensure that the material can only flow in one direction, that is, flow out of the material distribution pipe 110 and cannot flow back. This one-way flow characteristic helps prevent the material from being mixed or contaminated during the material distribution process, thereby improving the accuracy of the material distribution.

[0089] The main function of the third shut-off valve 122 is to quickly and completely close the pipeline to isolate a part of the system. Here, the third shut-off valve 122 is used to cut off the passage of the material to the second back pressure valve 121 when necessary. This helps to prevent the material from flowing into the dispensing pipe 110 unnecessarily before or after the dispensing starts, thereby ensuring accurate control of the dispensing process.

[0090] 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 material distribution process, the material will not accidentally leak or flow back into the material distribution pipe 110 from the downstream of the back pressure valve. This helps to maintain the purity of the material in the material distribution pipe 110 and the accuracy of the material distribution.

[0091] In the above structure, the one-way flow characteristic of the second back pressure valve 121 allows the material to only flow out of the distribution pipe 110 and cannot flow back. This helps to prevent the material from being mixed up during the distribution process. By precisely controlling the opening and closing of the third shut-off valve 122 and the fourth shut-off valve 123, precise control of the material flow path can be achieved. This helps to isolate the distribution pipe 110 before the distribution begins to prevent the material from flowing in prematurely; after the distribution is completed, the material flow is cut off in time to prevent the material from leaking or flowing back. This precise control is crucial to ensure the accuracy and efficiency of the distribution process.

[0092] In some optional embodiments, a manual control valve 120 is further provided on the material distribution pipe 110. Exemplarily, the manual control valve 120 is provided upstream of the third shut-off valve 122 and downstream of the pressure-starting device 116 and the fourth shut-off valve 123. By providing the manual control valve 120, the flow of materials in the material distribution pipe 110 can be cut off in time when an unexpected situation occurs.

[0093] like Figure 4 As shown, in some embodiments of the present application, the feeding system 1 further includes a monitoring device, the monitoring device includes a first pressure gauge 124 disposed on the storage tank 101 , and / or the monitoring device includes a remote liquid level gauge 125 disposed on the storage tank 101 .

[0094] The first pressure gauge 124 is used to monitor the pressure change in the storage tank 101 in real time. During the material distribution process, as the material continues to decrease, the pressure in the storage tank 101 may gradually decrease. Alternatively, during the process of adding materials to the storage tank 101, the pressure in the storage tank 101 will gradually increase. By setting the first pressure gauge 124, abnormal pressure conditions can be discovered and controlled in time, thereby avoiding safety accidents such as tank rupture caused by too low or too high pressure.

[0095] The remote level meter 125 is used to monitor the material level changes in the storage tank 101 in real time. By reading the data of the remote level meter 125, the storage amount of the material in the storage tank 101 can be accurately understood, thereby realizing accurate control of the material amount. This helps to adjust the speed in time during the material distribution process and the material addition process, ensuring the accuracy and efficiency of the material distribution and addition.

[0096] In the above technical solution, a detection device is provided to detect the pressure of the storage tank 101 during the material distribution process, thereby reducing accidents such as tank rupture caused by excessive pressure. A remote liquid level meter 125 is provided on the storage tank 101 to increase the material quantity in real time, thereby improving the efficiency of the material distribution process.

[0097] In some optional embodiments, a remote pressure gauge 126 is also provided on the storage tank 101. The remote pressure gauge 126 can transmit information on the storage tank 101 via wireless signals, thereby improving the convenience and real-time performance of the pressure detection process.

[0098] like Figure 2 As shown, in some embodiments of the present application, the monitoring device also includes a second pressure gauge 127 disposed on the circulation pipeline 102 .

[0099] During the operation of the feeding system 1, the pressure in the circulation pipeline 102 may change due to factors such as material flow and temperature changes. If the pressure is too high, it may cause excessive pressure on the pipeline, increasing the risk of safety accidents such as pipeline rupture and leakage. By setting the second pressure gauge 127, abnormal pressure conditions can be discovered and warned in time. Once the pressure exceeds the preset safety range, the operator can immediately take measures to adjust it, such as reducing the feeding speed, opening the bypass valve, etc., to relieve the pipeline pressure and reduce the risk of rupture.

[0100] 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 accommodating materials, and the storage tank 101 is provided with a circulation inlet 108 and a circulation outlet 109 communicated 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 arranged on the distributing pipe 110. The first flow meter 105 is arranged on the circulation pipeline 102, and the first flow meter 105 is arranged between the circulation outlet 109 and the distributing pipe 110. The second flowmeter 106 is connected to the circulation pipeline 102, and the second flowmeter 106 is arranged between the distribution pipe 110 and the circulation inlet 108. The first flowmeter 105 is a mass flowmeter, and the second flowmeter 106 is a mass flowmeter. The feeding system 1 also includes a shock absorbing device 114 arranged on the circulation pipeline 102, and the shock absorbing device 114 is connected between the circulation outlet 109 and the first flowmeter 105, and the storage tank 101 is also provided with an exhaust hole 115 connected to the storage chamber 107. The number of the distribution device 104 is multiple, and the multiple distribution devices 104 are connected to the circulation pipeline 102 in parallel in sequence. The circulation pipeline 102 is also provided with a pressure-starting device 116, which can be opened when the pressure of the circulation pipeline 102 is greater than a threshold value. The pressure-starting device 116 is arranged between the second flowmeter 106 and the circulation inlet 108. The pressure-starting 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 pipeline 102, the first cut-off valve 118 is connected to the circulation pipeline 102, and the first cut-off valve 118 is located upstream of the first back pressure valve 117. The second cut-off valve 119 is connected to the circulation pipeline 102, and the second cut-off valve 119 is located downstream of the first back pressure valve 117. The control component 111 includes a second back pressure valve 121, a third cut-off valve 122 and a fourth cut-off valve 123. The second back pressure valve 121 is connected to the material distribution pipe 110, the third cut-off valve 122 is connected to the material distribution pipe 110, and the third cut-off valve 122 is located upstream of the back pressure valve. The fourth cut-off valve 123 is connected to the material distribution pipe 110, and the fourth cut-off valve 123 is located downstream of the back pressure valve.

[0101] The embodiment of the present application provides a battery manufacturing device, which includes the feeding system 1 in the above embodiment. In the battery manufacturing device, the above-mentioned feeding system 1 is used to manufacture active material slurry. A storage tank 101 is set to accommodate the solvent in the active material slurry, provide a stable environment for the storage and distribution of the solvent, and reduce the pollution of the solvent by external impurities. The circulating pipeline 102 is set up, which can be used to discharge the gas in the circulating pipeline 102 after maintenance, thereby eliminating the influence of bubbles on the first flowmeter 105 and the second flowmeter 106. At the same time, the circulating pipeline 102 can transport the solvent from the storage tank 101 to the dispensing device 104, and the dispensing device 104 can be connected to the mixer to stir and dissolve the solvent with the active material powder. Various control devices and monitoring devices can also be set on the circulating pipeline 102 to improve the stability of the solvent feeding process and the accuracy of control. The dispensing device 104 is used to dispense the solvent into the mixer. The control component 111 can control the circulation and disconnection of the material in the dispensing pipe 110 to achieve 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, thereby improving the accuracy of the solvent addition process.

[0102] like Figure 5 As shown, the embodiment of the present application further provides a material filling method, which uses the filling system 1 in the above embodiment to fill materials, and the material filling method includes: S1, adding materials into the storage tank 101; S2, controlling the material in the storage tank 101 to enter the circulation pipeline 102; S3, starting the control component 111 to connect the material distribution pipe 110 with the circulation pipeline 102, so as to inject the material from the circulation pipeline 102 into the material distribution pipe 110; S4, reading the reading M1 of the first flow meter 105 and the reading M2 of the second flow meter 106 on the circulation pipeline 102, and obtaining the amount M of material entering the distribution pipe 110; S5. Monitor the value of M during the filling process. When M reaches the preset filling amount, cut off the connection between the material distribution pipe 110 and the circulation pipeline 102 to complete the material filling.

[0103] Step S1 is the initial step of material filling, ensuring that there is enough material in the storage tank 101 for subsequent filling. It is understandable that when the storage tank 101 has already stored the corresponding material in advance, this step can be omitted.

[0104] In step S2, the material in the storage tank 101 is introduced into the circulation pipeline 102 smoothly and orderly by adjusting the control components 111 such as relevant valves or pumps, thereby improving the continuity and stability of the material during the filling process.

[0105] Step S3: When the circulation pipeline 102 is filled with materials and reaches a stable state, the control component 111 is started to connect the material distribution pipe 110 with the circulation pipeline 102. This step is a key start step to achieve accurate material filling.

[0106] Step S4: The first flow meter 105 and the second flow meter 106 are respectively set on the circulation pipeline 102. By reading the readings M1 and M2 of the two flow meters, the amount of material M entering the distribution pipe 110 can be calculated. For example, assuming that the first flow meter 105 and the second flow meter 106 are always filled with incompressible material, M = M1 - M2. This step ensures accurate measurement of the material filling amount.

[0107] Step S5 monitors the value of M during the filling process in real time. When M reaches the preset filling amount, the connection between the material distribution pipe 110 and the circulation pipeline 102 is immediately cut off to complete the material filling. This step ensures the accuracy and timeliness of the material filling amount.

[0108] The above technical solution, by respectively setting the first flow meter 105 and the second flow meter 106 at the outlet of the storage tank 101 and the loop of the circulation pipeline 102, and setting a back pressure valve after the circulation loop flow meter, ensures that the space between the two flow meters is always filled with incompressible materials, so 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, and realizes accurate material measurement. The above technical solution can replace the method of setting a floor scale under the storage tank 101, and improves the control accuracy of material distribution and filling.

[0109] like Figure 6 As shown, in some embodiments of the present application, step S2 includes: S201, connecting the storage tank 101 with the circulation pipeline 102; S202, turning on the circulation pump 103 on the circulation pipeline 102 to inject the material into the circulation pipeline 102; S203, opening the exhaust hole 115 on the storage tank 101 to discharge the gas in the circulation pipeline 102.

[0110] The circulation pump 103 is a key device for driving the material to flow in the circulation pipeline 102. After the circulation pump 103 is turned on, the material will be sucked into the pump and enter the circulation pipeline 102 through the driving action of the pump. This step ensures the continuous flow of the material in the circulation pipeline 102.

[0111] Before the material enters the circulation pipeline 102, gas may remain in the storage tank 101 and the circulation pipeline 102. If these gases are not discharged in time, bubbles may form during the material flow process, thereby affecting the metering accuracy of the flow meter. Therefore, it is necessary to open the exhaust hole 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 influence of bubbles on the metering accuracy of the first flow meter 105 and the second flow meter 106 can be reduced. This helps to ensure the accurate measurement of the material filling amount and improve the accuracy and reliability of the filling process. The presence of gas in the circulation pipeline 102 will not only affect the metering accuracy of the flow meter, but may also have a negative impact on the stability and operating efficiency of the system. Therefore, timely discharge of gas helps to optimize the performance of the entire feeding system 1.

[0112] The above technical solution reduces the influence of 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 .

[0113] like Figure 7 As shown, in some embodiments of the present application, step S2 further includes: S204, detecting the pressure-activated device 116 on the circulation pipeline 102, and maintaining the material to continue to circulate and flow in the circulation pipeline 102 after the pressure-activated device 116 is opened, and the flow time T is: 10s≤T≤50s.

[0114] When the pressure-starting device 116 detects that the material in the circulation pipeline 102 is full and the gas has been discharged, it will keep the material circulating in the circulation pipeline 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 pipeline 102 has been fully mixed and no bubbles remain. After the pressure-starting device 116 keeps the material circulating for T time, the first flow meter 105 and the second flow meter 106 start measuring. At this time, the difference between the two is the amount of material entering the distribution pipe 110.

[0115] By introducing the concepts of the pressure-start device 116 and the flow time T, the state of the material in the circulation pipeline 102 can be judged more accurately, thereby ensuring the metering accuracy of the flow meter. After confirming that the material in the circulation pipeline 102 is full and no bubbles remain, the metering and material distribution can be started, which can greatly improve the accuracy and speed of the flow control of the distribution pipe 110. By ensuring that the material in the circulation pipeline 102 is fully mixed and no bubbles remain, the system fluctuations and unstable factors can be reduced, thereby improving the stability of the entire feeding system 1.

[0116] In the above technical solution, the pressure-starting device 116 is opened and then circulates for a period of time, which proves that the material in the circulation pipeline 102 is full and the gas has been discharged. At this time, the first flow meter 105 and the second flow meter 106 start 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 of the distribution pipe 110.

[0117] like Figure 8 As shown, in some embodiments of the present application, step S4 includes: S401, after the injection of materials into the circulation pipeline 102 is completed, the readings of the first flow meter 105 and the second flow meter 106 are cleared; S402, start monitoring the values ​​of M1 and M2, and calculate M according to M=M1-M2.

[0118] After the injection of the material into the circulation pipeline 102 is completed, the entire circulation pipeline 102 is now full of material. In order to ensure the accuracy of the subsequent flow meter readings, it is necessary to reset the readings of the first flow meter 105 and the second flow meter 106. The purpose of this step is to eliminate the possible accumulated errors and provide an accurate starting point for subsequent real-time monitoring and calculation.

[0119] After the zeroing operation is completed, the system enters the real-time monitoring stage. 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 real-time monitoring and calculating the M value, the system can accurately control the distribution amount to ensure the accuracy and stability of the filling process.

[0120] During the circulation process in the circulation pipeline 102, the material distribution has not started. After clearing, M1 and M2 should be equal, that is, 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.

[0121] When the material distribution starts, a portion of the material M1 flowing out of the storage tank 101 flows out of the circulation pipeline 102 through the distribution pipe 110, and the material returning to the storage tank 101 through the circulation pipeline 102 is M2, so M=M1-M2.

[0122] In the above technical solution, material distribution is started only after the circulation pipeline 102 is full of materials and the readings of the first flow meter 105 and the second flow meter 106 tend to be stable, thereby improving the control accuracy of the filling amount.

[0123] like Fig. 9 As shown, in some optional embodiments, step S4 includes: S401A, after the injection of materials into the circulation pipeline 102 is completed, the amount of materials entering the circulation pipeline 102 from the storage tank 101 is calculated as M0=M1-M2; S402A, monitor the values ​​of M1 and M2 in real time, and calculate M according to M=M1-M2-M0.

[0124] The above calculation method takes the amount of material in the circulation pipeline 102 into consideration, thereby improving the accuracy of M calculation.

[0125] like Fig.10 As shown, in some embodiments of the present application, step S5 includes: S501, when M reaches 98% of the preset filling amount, the third shut-off valve 122 and the fourth shut-off valve 123 of the control component 111 are shut off in sequence; S502, closing the circulation pump 103; S503, close the pressure-start device 116.

[0126] 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, the third cut-off valve 122 is cut off first and then the fourth cut-off valve 123 is cut off, so that when the filling amount is close to the preset value, more materials can be effectively prevented from entering, thereby reducing the risk of overfilling.

[0127] After the shut-off valve is closed, the system continues to execute the operation of shutting down the circulation pump 103. The circulation pump 103 plays a key role in the material filling process, and is responsible for pumping the material from the storage tank 101 and injecting it into the circulation pipeline 102. Shutting down the circulation pump 103 can ensure that after the filling amount reaches the preset value, no new material is pumped into the system, thereby further consolidating the precise control of the filling amount.

[0128] Finally, the system executes the operation of closing the pressure-start device 116. The pressure-start device 116 may be used to provide the necessary pressure or start signal during the material filling process to ensure the smooth injection of the material. Closing the pressure-start device 116 marks the official end of the filling process and also ensures that the system is in a safe and stable state after the filling is completed.

[0129] In the above technical solution, the above technical solution effectively reduces the risk of overfilling by precisely controlling the filling amount and timely cutting off the material supply when it is close to the preset value. At the same time, considering the possible delayed effect of closing the cut-off valve, the solution performs the cut-off operation in advance, thereby further improving the control accuracy of the filling process. This precise control not only helps to avoid material waste and pollution, but also ensures the stability and reliability of the filling process and improves overall production efficiency.

[0130] like Fig.11 As shown, in some embodiments of the present application, the material filling method further includes step S6, and step S6 includes: S601, after the first material distribution pipe 110 is filled with materials, the control component 111 is started to connect the second material distribution pipe 110 with the circulation pipeline 102, so as to inject the materials from the circulation pipeline 102 into the second material distribution pipe 110; S602, reading the reading M3 of the first flow meter 105 and the reading M4 of the second flow meter 106 on the circulation pipeline 102, and obtaining the amount M' of the material entering the second material distribution pipe 110; S603 , monitoring the value of M′ during the filling process, and when M′ reaches a preset filling amount, cutting off the connection between the second material distribution pipe 110 and the circulation pipeline 102 , and completing the material filling of the second material distribution pipe 110 .

[0131] It is understandable that there is no connection sequence or precedence relationship between the first distribution pipe 110 and the second distribution pipe 110, and the first distribution pipe 110 and the second distribution pipe 110 are simultaneously connected in parallel to the circulation pipeline 102. The first distribution pipe 110 and the second distribution pipe 110 are named to distinguish the two distribution pipes 110 for ease of description.

[0132] After the material filling of the first distribution pipe 110 is completed, the system starts the control component 111 to connect the second distribution pipe 110 with the circulation pipeline 102. This step ensures that the material can be smoothly injected from the circulation pipeline 102 into the second distribution pipe 110, preparing for the subsequent filling process.

[0133] After the switch is completed, the system immediately reads the readings of the first flow meter 105 (recorded as M3 at this time, used to monitor the material flow entering the second material distribution pipe 110) and the second flow meter 106 (recorded as M4 at this time, which may be used to monitor the flow of other parts in the circulation pipeline 102, but in this scenario, the main focus is on M3) on the circulation pipeline 102. Through the difference between these two readings or the single 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 material distribution pipe 110.

[0134] During the filling process, the system continuously monitors the value of M'. When M' reaches the preset filling amount, the system immediately cuts off the connection between the second material distribution pipe 110 and the circulation pipeline 102, thereby completing the material filling of the second material distribution pipe 110. This step ensures the precise control of the filling amount and avoids waste and pollution of materials.

[0135] like Fig.12 As shown, in some optional embodiments, step S602 includes: S602A, clear the readings of the first flow meter 105 and the second flow meter 106; S602B, monitor the M' value in real time, and calculate M' according to M'=M3-M4.

[0136] In the above technical solution, the metering accuracy of the material entering the second distribution pipe 110 is improved by resetting the first flow meter 105 and the second flow meter 106 to zero.

[0137] In some optional embodiments, step S602 includes: S602a, monitor the value of M' in real time, and calculate M' according to M'=M3-M4-M0-M. The above technical solution takes into account the amount of material in the circulation pipeline 102 and the amount of material entering the first distribution pipe 110, and accurately calculates the amount of material entering the second distribution pipe 110. The above technical solution, by quickly switching the connection of the distribution pipe 110, realizes the filling process of the second distribution pipe 110 immediately after the filling of the first distribution pipe 110 is completed. This design not only improves the efficiency of material filling, but also helps to reduce waiting time and production costs. At the same time, by accurately controlling the filling amount, the stability and reliability of the filling process are ensured.

[0138] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present 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 material storage tank having a material storage cavity for accommodating materials, wherein the material storage tank is provided with a circulation inlet and a circulation outlet communicated with the material storage cavity; A circulation pipeline, both ends of which are respectively connected to the circulation inlet and the circulation outlet; A circulation pump connected to the circulation pipeline; The material distribution device comprises a material distribution pipe and a control component, wherein the material distribution pipe is connected to the circulation pipeline, and the control component is arranged on the material distribution pipe; First flow meter; A second flow meter; Among them, 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 material distribution device, the first flow meter is arranged on the discharge pipe, the two ends of the return pipe are respectively connected to the material distribution device and the circulation inlet, and the second flow meter is arranged on the return pipe.

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 further comprises a shock absorbing device arranged on the circulation pipeline, and the shock absorbing device is connected between the circulation outlet and the first flow meter.

4. The feeding system according to claim 2, characterized in that: The material storage tank is also provided with an exhaust hole communicated with the material storage cavity.

5. The feeding system according to claim 2, characterized in that: There are multiple material distribution devices, and the multiple material distribution devices are sequentially connected in parallel to the circulation pipeline.

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

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

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

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

10. The feeding system according to any one of claims 1 to 5, characterized in that: The feeding system further comprises a monitoring device, wherein the monitoring device comprises a first pressure gauge arranged on the storage tank, and / or the monitoring device comprises a liquid level gauge arranged on the storage tank.

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

12. A battery manufacturing device, characterized in that: Comprising a feeding system as claimed in any one of claims 1 to 11.

13. A material filling method, characterized in that: The material is charged using the charging system as claimed in any one of claims 1 to 11, and the material charging method comprises: Add materials into the storage tank; Controlling the material in the storage tank to enter the circulation pipeline; Starting the control component to connect the material distribution pipe with the circulation pipeline, so as to inject the material from the circulation pipeline into the material distribution 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 M of material entering the distribution pipe; The value of M during the filling process is monitored. When M reaches a preset filling amount, the connection between the material distribution pipe and the circulation pipeline is cut off to complete the material filling.

14. The material filling method according to claim 13, characterized in that: The controlling the material in the storage tank to enter the circulation pipeline comprises: Connecting the material storage tank to the circulation pipeline, and turning on the circulation pump on the circulation pipeline to inject the material into the circulation pipeline; Open the exhaust hole 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 controlling of the material in the storage tank to enter the circulation pipeline also includes: detecting a pressure-activated device on the circulation pipeline, and maintaining the material to continue circulating in the circulation pipeline after the pressure-activated device is activated, and the flow time T is: 10s≤T≤50s.

16. The material filling method according to claim 15, characterized in that: The steps 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 M of material entering the distribution pipe include: After the injection of the material into the circulation pipeline is completed, 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 value of M during the monitoring filling process, when M reaches the preset filling amount of the dosing device, the connection between the material receiving device and the circulation pipeline is cut off, and the material filling is completed, including: When M reaches 98% of the preset filling amount, the third shut-off valve and the fourth shut-off valve of the control component are cut off in sequence; Turn off the circulation pump; Close the pressure-activated device.

18. The material filling method according to any one of claims 13 to 17, characterized in that: The material filling method also includes: After the first material distribution pipe is filled with materials, the control component is started to connect the second material distribution pipe with the circulation pipeline, so as to inject the materials from the circulation pipeline into the second material 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 M' of material entering the second material distribution pipe; The value of M' during the filling process is monitored. When M' reaches a preset filling amount, the connection between the second material distribution pipe and the circulation pipeline is cut off to complete the material filling of the second material distribution pipe.

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