Discharging system

Abstract

The utility model belongs to the technical field of batteries, and discloses a blanking system which comprises a storage device, a detection device, a controller and a protection device, the detection device and the protection device are respectively arranged on the material storage device, and the detection device and the protection device are respectively connected with the controller; the detection device is used for detecting the pressure in the storage device and the concentration of the oxidizing gas and sending the pressure and the concentration to the controller; and the protection device is used for controlling the flow of protective gas entering the material storage device according to the pressure signal and the gas concentration signal received by the controller, and discharging the oxidizing gas in the material storage device. The protection device is arranged on the material storage device and nitrogen is gradually filled to remove oxygen, so that the oxidative degradation reaction of the raw materials to be prepared due to long-time exposure to air is avoided, and the overall performance and the service life of the lithium battery are effectively ensured.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a feeding system. Background Technology

[0002] In the manufacturing process of lithium-ion batteries, SBR (styrene-butadiene rubber latex) is one of the key raw materials and plays a crucial role in the preparation of negative electrode slurry. However, the SBR storage tanks in traditional automated SBR feeding systems are usually directly connected to the atmosphere, lacking effective oxygen isolation measures. This leads to SBR being easily oxidized and degraded when exposed to air for extended periods, affecting its bonding performance and ultimately causing battery failure. Utility Model Content

[0003] The main purpose of this invention is to provide a feeding system that addresses the technical problem that existing SBR storage tanks are usually directly connected to the atmosphere, causing SBR to be exposed to oxygen for a long time, resulting in oxidation and degradation, which leads to a decrease in SBR bonding performance and battery failure.

[0004] To achieve the above-mentioned utility model objectives, this utility model proposes a feeding system, including a material storage device, a detection device, a controller, and a protection device;

[0005] The detection device and the protection device are respectively installed on the storage device, and the detection device and the protection device are respectively connected to the controller;

[0006] The detection device is used to detect the pressure and concentration of oxidizing gas inside the storage device and send the data to the controller;

[0007] The protection device is used to control the flow rate of protective gas into the storage device and to remove the oxidizing gas from the storage device based on the pressure signal and gas concentration signal received by the controller.

[0008] Furthermore, the storage device includes a storage tank and a stirring component, and the detection device includes a pressure detection component and a gas concentration detection component. The stirring component, the pressure detection component, and the gas concentration detection component are respectively disposed on the storage tank, and the stirring component, the pressure detection component, and the gas concentration detection component are arranged at intervals between each other. The pressure detection component is used to detect the pressure inside the storage tank, and the gas concentration detection component is used to detect the concentration of the oxidizing gas inside the storage tank.

[0009] Furthermore, the detection device also includes a pressure relief component, which is disposed on the storage tank and is arranged correspondingly to the pressure detection component and the gas concentration detection component.

[0010] Furthermore, the protection device includes a gas supply pipe and a first solenoid valve. The gas supply pipe is installed on the storage tank and is arranged correspondingly to the stirring component. The first solenoid valve is installed on the gas supply pipe and connected to the controller.

[0011] Furthermore, the feeding system also includes a conveying device and a mixing tank, the mixing tank being arranged correspondingly to the storage tank, the conveying device being connected to the controller, and the storage tank being connected to the mixing tank through the conveying device.

[0012] Furthermore, the material conveying device includes a discharge pump and a discharge pipe. The discharge pump is connected to the controller. The discharge pump is arranged correspondingly to the mixing tank and the storage tank, respectively. The storage tank is connected to the discharge pipe through the discharge pump. The discharge pipe is located on the side of the discharge pump away from the storage tank and is connected to the mixing tank.

[0013] Furthermore, the material conveying device also includes a second solenoid valve, which is connected to the controller and is located at the end of the discharge pipe away from the discharge pump.

[0014] Furthermore, the inner wall of the discharge pipe is coated with a low surface energy material, and the coating extends along the entire circumference of the discharge pipe.

[0015] Furthermore, the coating material is one or more of fluorocarbon, silicon-based, carbon-based coatings, and hydrophobic modified metal oxide materials.

[0016] Furthermore, the surface energy of the coating is less than or equal to 50 mN / m.

[0017] Beneficial effects:

[0018] This utility model discloses a feeding system, comprising a storage device, a detection device, a controller, and a protection device. The detection device and the protection device are respectively mounted on the storage device and connected to the controller. The detection device detects the pressure and concentration of oxidizing gas within the storage device and transmits the data to the controller. The protection device controls the flow rate of protective gas entering the storage device based on the pressure and gas concentration signals received by the controller, and removes the oxidizing gas from the storage device. By gradually introducing nitrogen through the protection device on the storage device to remove oxygen, the oxidative degradation reaction of the raw materials in the storage device due to prolonged exposure to air is avoided, effectively ensuring the overall performance and lifespan of the lithium battery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a feeding system according to an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of the discharge pipe according to an embodiment of the present invention.

[0021] in:

[0022] 1. Storage device; 2. Detection device; 3. Controller; 4. Protection device; 5. Conveying device; 6. Mixing tank;

[0023] 10. Storage tank; 11. Mixing component; 12. Support column;

[0024] 20. Pressure detection component; 21. Gas concentration detection component; 22. Pressure relief component;

[0025] 40. Gas pipeline; 41. First solenoid valve;

[0026] 50. Discharge pump; 51. Discharge pipe; 52. Second solenoid valve; 53. Coating.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] Reference Figure 1 This embodiment provides a feeding system, including a storage device 1, a detection device 2, a controller 3, and a protection device 4;

[0033] The detection device 2 and the protection device 4 are respectively installed on the storage device 1, and the detection device 2 and the protection device 4 are respectively connected to the controller 3;

[0034] The detection device 2 is used to detect the pressure and concentration of oxidizing gas inside the storage device 1 and send the data to the controller 3;

[0035] The protection device 4 is used to control the flow rate of protective gas into the storage device 1 and to remove the oxidizing gas from the storage device 1 based on the pressure signal and gas concentration signal received by the controller 3.

[0036] In the above embodiments, the feeding system mainly consists of a storage device 1, a detection device 2, a controller 3, and a protection device 4. The storage device 1 is used to store the raw materials to be prepared, preferably SBR (styrene-butadiene rubber latex). The detection device 2 is installed on the storage device 1 and is connected to the controller 3. The controller 3, as the brain of the system, adopts a PLC (programmable logic controller 3). The detection device 2 is used to detect the pressure and the concentration of oxidizing gas in the storage device 1 and send them to the controller 3. The oxidizing gas is preferably oxygen. The controller 3 can make corresponding control commands based on the received pressure signal and gas concentration signal. The protection device 4 is installed on the storage device 1 and is also connected to the controller 3. The protection device 4 is mainly used to control the flow rate of protective gas entering the storage device 1 based on the pressure signal and gas concentration signal received by the controller 3. The protective gas is preferably nitrogen. It also removes the oxidizing gas inside the storage device 1 to maintain an inert environment inside the storage device 1. Therefore, by gradually filling the storage device 1 with nitrogen gas through the protective device 4 to remove oxygen, the oxidation and degradation reaction of the raw materials in the storage device 1 due to prolonged exposure to air is avoided, effectively ensuring the overall performance and service life of the lithium battery.

[0037] Reference Figure 1 In one embodiment, the storage device 1 includes a storage tank 10 and a stirring component 11, and the detection device 2 includes a pressure detection component 20 and a gas concentration detection component 21. The stirring component 11, the pressure detection component 20, and the gas concentration detection component 21 are respectively disposed on the storage tank 10, and the stirring component 11, the pressure detection component 20, and the gas concentration detection component 21 are arranged at intervals between each other. The pressure detection component 20 is used to detect the pressure inside the storage tank 10, and the gas concentration detection component 21 is used to detect the concentration of the oxidizing gas inside the storage tank 10.

[0038] In the above embodiment, the storage device 1 includes a storage tank 10 and a stirring component 11, and the detection device 2 includes a pressure detection component 20 and a gas concentration detection component 21. The storage tank 10 is a sealed tank, and the stirring component 11 is installed on the storage tank 10 and connected to the controller 3. A motor drives the stirring rod to perform stirring operations inside the storage tank 10. The motor is located at the top of the storage tank 10, while the stirring rod extends into the storage tank 10 to ensure uniform mixing of the raw materials. The pressure detection component 20 is responsible for real-time monitoring of pressure changes inside the storage tank 10. The pressure detection component 20 is installed at the top of the storage tank 10, that is, at... At the top of the storage tank 10, when the pressure reaches the preset target value, the pressure detection component 20 will send a signal back to the controller 3; the gas concentration detection component 21 is specifically used to detect the concentration of oxidizing gas (mainly oxygen) in the storage tank 10. The gas concentration detection component 21 is also located at the top of the storage tank 10. At the same time, the stirring component 11, the pressure detection component 20 and the gas concentration detection component 21 are arranged at intervals. The gas concentration detection component 21 adopts fiber optic sensor technology. Once the oxygen concentration is detected to exceed the safety threshold, the gas concentration detection component 21 will transmit the signal to the controller 3 through the fiber optic sensor.

[0039] Furthermore, the storage device 1 also includes support columns 12 disposed on the side of the storage tank 10 away from the stirring component 11, i.e., at the bottom of the storage tank 10. These support columns 12 give the storage tank 10 a certain height, keeping it at a certain distance from the ground. In addition, the multiple support columns 12 can be arranged in an equilateral triangle, a regular quadrilateral, or a circle at the bottom. The central axis of the stirring component 11 is located in the middle of the storage tank 10, and is also at the center of the interconnection of the multiple support columns 12, which effectively enhances the structural stability of the storage tank 10 and reduces the risk of damage to the entire system caused by external vibration or unbalanced forces.

[0040] Furthermore, the detection device 2 also includes a pressure relief component 22. The function of the pressure relief component 22 is to safely relieve pressure when the pressure inside the storage tank 10 is too high. The pressure relief component 22 is located at the top of the storage tank 10 and is arranged correspondingly to the pressure detection component 20 and the gas concentration detection component 21. The top of the storage tank 10 is preferably circular. The pressure relief component 22, the pressure detection component 20, and the gas concentration detection component 21 are all located on the same diameter, forming a symmetrical layout. The stirring component 11 is located at the center of the top of the storage tank 10, while the pressure detection component 20 and the gas concentration detection component 21 are located on one side of the stirring component 11, and the pressure relief component 22 is located on the other side. After a fixed weight of SBR emulsion is added to the storage tank 10, the oxygen concentration is detected by the gas concentration detection component 21. When oxygen is detected in the tank, the oxygen concentration is detected by the gas concentration detection component 21. The fiber optic sensor transmits a signal to the controller 3. The controller 3 controls the flow rate of nitrogen gas through the protection device 4 installed on the storage tank 10. After nitrogen filling, the pressure inside the tank is detected by the pressure detection component 20. When the pressure reaches the target set value, a feedback signal is sent to the controller 3. The controller 3 stops nitrogen filling and controls the pressure relief component 22 to release pressure. When the pressure reaches the normal pressure (set value), a feedback signal is sent to the controller 3 again to fill with nitrogen. This cycle is repeated to gradually remove oxygen from the storage tank 10. SBR emulsion is prone to oxidation and degradation reaction with oxygen. By integrating the pressure detection component 20, the gas concentration detection component 21, and the pressure relief component 22, the quality stability of SBR emulsion in the lithium battery manufacturing process is significantly improved. At the same time, the need for manual intervention is reduced, and the continuity and automation of production are improved.

[0041] Reference Figure 1 In one embodiment, the protection device 4 includes a gas supply pipe 40 and a first solenoid valve 41. The gas supply pipe 40 is disposed on the storage tank 1 and is arranged correspondingly to the stirring component 11. The first solenoid valve 41 is disposed on the gas supply pipe 40 and connected to the controller 3.

[0042] In the above embodiment, the protection device 4 includes a gas supply pipe 40 and a first solenoid valve 41. The gas supply pipe 40 is a channel for introducing nitrogen from an external supply source into the storage tank 10. The gas supply pipe 40 is located on the top of the storage tank 10 and on one side of the stirring component 11. The gas supply pipe 40 and the stirring component 11 are on the same radial straight line. The first solenoid valve 41 is a control element installed on the gas supply pipe 40. Its main function is to regulate the flow rate of nitrogen into the storage tank 10. The first solenoid valve 41 is installed on the gas supply pipe 40 and is close to the inlet of the storage tank 10. The first solenoid valve 41 is connected to the controller 3 through an electrical signal. The controller 3 adjusts the opening and closing state of the first solenoid valve 41 in real time according to the data from the detection device 2 (such as pressure and oxygen concentration) to adjust the nitrogen input. When nitrogen needs to be added, the controller 3 sends a signal to the first solenoid valve 41 to open the valve and allow nitrogen to flow into the storage tank 10. When the preset pressure or oxygen concentration target is reached, the controller 3 sends a signal again to close the solenoid valve and stop the nitrogen input. This allows the system to dynamically adjust the nitrogen flow rate according to actual needs, avoiding resource waste and potential safety hazards caused by overfilling.

[0043] Reference Figure 1 In one embodiment, the feeding system further includes a conveying device 5 and a mixing tank 6, the mixing tank 6 being arranged correspondingly to the storage tank 10, the conveying device 5 being connected to the controller 3, and the storage tank 10 being connected to the mixing tank 6 through the conveying device 5.

[0044] In the above embodiment, the feeding system also includes a conveying device 5 and a mixing tank 6. The mixing tank 6 is arranged correspondingly to the storage tank 10. The mixing tank 6 is usually located downstream of the storage tank 10, and there is a certain gap between the mixing tank 6 and the storage tank 10. The conveying device 5 is connected to the controller 3. At the same time, the two ends of the conveying device 5 are connected to the storage tank 10 and the mixing tank 6 respectively. That is, the conveying device 5 is responsible for conveying the SBR emulsion from the storage tank 10 to the mixing tank 6. The SBR emulsion is added into the mixing tank 6 through the conveying device 5 to form a negative electrode slurry, so that the entire conveying process of the raw materials can be automatically controlled.

[0045] Furthermore, the conveying device 5 includes a discharge pump 50 and a discharge pipe 51. The discharge pump 50 serves as a power source, responsible for driving the flow of the SBR emulsion. The discharge pump 50 is preferably a screw pump. The discharge pump 50 is electrically connected to the controller 3 to achieve automated control. The controller 3 sends commands to the discharge pump 50 according to preset parameters (such as flow rate and time) to precisely control the delivery volume of the SBR emulsion. The discharge pump 50 is located between the mixing tank 6 and the storage tank 10. The storage tank 10 is connected to the discharge pipe 51 via the discharge pump 50. One end (the side of the storage tank 10 with the support column 12), that is, the bottom of the storage tank 10, allows the discharge pump 50 to be connected to the center of the bottom of the storage tank 10 through the intervals formed by multiple support columns 12; the discharge pipe 51 is the actual channel for conveying SBR emulsion. The discharge pipe 51 is set on the side of the discharge pump 50 away from the storage tank 10 and connected to the mixing tank 6. That is, one end of the discharge pipe 51 is connected to the discharge pump 50, and the other end is connected to the top edge of the mixing tank 6, forming a simple and efficient conveying path, ensuring the high efficiency of the system operation.

[0046] Furthermore, the feeding device 5 also includes a second solenoid valve 52, which is electrically connected to the controller 3. The second solenoid valve 52 is installed at the end of the discharge pipe 51 away from the discharge pump 50. Its main function is to regulate the flow rate of SBR emulsion from the storage tank 10 into the mixing tank 6. Through the precise commands of the controller 3, the second solenoid valve 52 can dynamically adjust the opening and closing state of the valve according to actual needs. When the raw material to be prepared needs to be fed into the mixing tank 6 through the discharge pipe 51, the controller 3 outputs a signal to the discharge pump 50 and the second solenoid valve 52 to start the discharge pump 50 and open the second solenoid valve 52. When the feeding ends, the controller 3 outputs a signal to the second solenoid valve 52 to close the valve. Alternatively, the discharge pump 50 can be stopped or operated at low power to achieve precise control of the material flow rate.

[0047] Reference Figures 1-2 In one embodiment, the inner wall of the discharge pipe 51 is coated with a low surface energy material coating 53, which extends along the entire circumference of the discharge pipe 51.

[0048] In the above embodiment, the inner wall of the discharge pipe 51 is coated with a low surface energy material coating 53. This coating 53 extends along the entire circumference of the discharge pipe 51, that is, the entire inner wall of the discharge pipe 51 is coated with the coating 53. The material of the coating 53 is one or a combination of fluorocarbon coatings, silicon-based coatings, carbon-based coatings, and hydrophobic modified metal oxide materials. Fluorocarbon coatings can be polytetrafluoroethylene or perfluoroalkyl compounds, silicon-based coatings can be polydimethylsiloxane or fluorosilane, carbon-based coatings can be diamond-like carbon, graphene, or fluorinated graphene, and hydrophobic modified metal oxide materials include silica nanocoatings or alumina + fluorosilane. A common feature of all these coating materials 53 is that their surface energy is less than or equal to 50 mN / m, which gives them excellent hydrophobicity and anti-stick properties, ensuring that the SBR emulsion can flow smoothly throughout the transportation process and reducing the risk of adhesion and blockage.

[0049] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A feeding system, characterized in that, It includes storage devices, detection devices, controllers, and protection devices; The detection device and the protection device are respectively installed on the storage device, and the detection device and the protection device are respectively connected to the controller; The detection device is used to detect the pressure and concentration of oxidizing gas inside the storage device and send the data to the controller; The protection device is used to control the flow rate of protective gas into the storage device and to remove the oxidizing gas from the storage device based on the pressure signal and gas concentration signal received by the controller.

2. The feeding system according to claim 1, characterized in that, The storage device includes a storage tank and a stirring component. The detection device includes a pressure detection component and a gas concentration detection component. The stirring component, the pressure detection component, and the gas concentration detection component are respectively disposed on the storage tank, and the stirring component, the pressure detection component, and the gas concentration detection component are arranged at intervals. The pressure detection component is used to detect the pressure inside the storage tank, and the gas concentration detection component is used to detect the concentration of the oxidizing gas inside the storage tank.

3. The feeding system according to claim 2, characterized in that, The detection device also includes a pressure relief component, which is disposed on the storage tank and is arranged correspondingly to the pressure detection component and the gas concentration detection component.

4. The feeding system according to claim 2, characterized in that, The protection device includes a gas supply pipeline and a first solenoid valve. The gas supply pipeline is installed on the storage tank and is arranged correspondingly to the stirring component. The first solenoid valve is installed on the gas supply pipeline and connected to the controller.

5. The feeding system according to claim 2, characterized in that, The feeding system also includes a conveying device and a mixing tank. The mixing tank is arranged correspondingly to the storage tank. The conveying device is connected to the controller, and the storage tank is connected to the mixing tank through the conveying device.

6. The feeding system according to claim 5, characterized in that, The material conveying device includes a discharge pump and a discharge pipe. The discharge pump is connected to the controller. The discharge pump is arranged correspondingly to the mixing tank and the storage tank. The storage tank is connected to the discharge pipe through the discharge pump. The discharge pipe is located on the side of the discharge pump away from the storage tank and is connected to the mixing tank.

7. The feeding system according to claim 6, characterized in that, The material conveying device further includes a second solenoid valve, which is connected to the controller and is located at the end of the discharge pipe away from the discharge pump.

8. The feeding system according to claim 6, characterized in that, The inner wall of the discharge pipe is coated with a low surface energy material, and the coating extends along the entire circumference of the discharge pipe.

9. The feeding system according to claim 8, characterized in that, The surface energy of the coating is less than or equal to 50 mN / m.

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