Accurate batching system for lithium battery diaphragm coating

Abstract

The utility model discloses a lithium battery diaphragm coating accurate batching system, including batching device, regulation and control device and early warning device, batching device includes slurrying tank, slurry storage tank, stirring tank, middle storage tank, grinder, grouting tank and finished product tank, finished product tank is connected with coating machine through pipeline, and the pipeline is connected with the coating machine through pipeline. A first conveying pump and a first flow meter are arranged on a pipeline between the slurry storage tank and the stirring tank, the slurry preparation tank, the first conveying pump, the first flow meter and the coating machine are all in signal connection with the regulation and control device, and the first flow meter sends detected flow data to the regulation and control device; the regulation and control device is used for controlling the feeding of the pulping tank, the flow of the first conveying pump and the discharging of the coating machine; a temperature sensor in signal connection with the early warning device is arranged on the pipeline between the middle storage tank and the grinding machine, a second conveying pump in signal connection with the early warning device is arranged on the pipeline between the finished product tank and the coating machine, and the early warning device is in signal connection with the regulation and control device.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of lithium battery diaphragm coating precision batching system, belong to lithium battery diaphragm production equipment technical field. BACKGROUND

[0002] With the development of science and technology, lithium battery has become the mainstream of power battery development, which has high specific energy, wide operating temperature range, stable discharge and other advantages, but there are still various safety hazards in the use process, which restricts its development. Safety is a factor that must be considered for batteries, and the closed pore temperature and membrane breaking temperature of the diaphragm are important indicators for ensuring the safety of lithium-ion batteries. Lithium batteries are mainly composed of positive electrodes, negative electrodes, electrolytes and diaphragms. The main function of the diaphragm is to separate the positive and negative electrodes to prevent short circuits caused by direct contact of the positive and negative electrodes and to prevent electrons from passing through while allowing ions to pass through. The performance of the diaphragm determines the interface structure and internal resistance of the battery, which in turn affects the capacity, cycle performance, and charge and discharge current density of the lithium battery. Therefore, the performance of the diaphragm plays an important role in improving the overall performance of the battery.

[0003] The effect of diaphragm coating batching directly affects the performance of the diaphragm. The existing batching system has low work efficiency, large batching error, and unsatisfactory spraying effect, which indirectly increases the safety hazards of diaphragm coating and lithium batteries. Moreover, the batching system of the prior art has a complex structure, high cost, and large space occupation. SUMMARY

[0004] The utility model aims at providing a kind of lithium battery diaphragm coating precision batching system, to solve the technical problem of the batching error of prior art batching system, low work efficiency.

[0005] The utility model adopts the following technical scheme: a kind of lithium battery diaphragm coating precision batching system, it includes batching device, control device and early warning device, batching device includes pulp preparation tank, slurry storage tank, stirring tank, middle storage tank, grinder, grout injection tank and finished product tank connected by pipeline in sequence, finished product tank is connected with coating machine by pipeline, first conveying pump and first flowmeter are equipped on the pipeline between slurry storage tank and stirring tank, pulp preparation tank, first conveying pump, first flowmeter, coating machine are all connected with control device by signal, first flowmeter sends the flow data detected to control device, control device is used to control the feed of pulp preparation tank, the flow of first conveying pump and the discharge of coating machine;Temperature sensor is equipped on the pipeline between middle storage tank and grinder, temperature sensor is signal connected with early warning device and sends temperature data to early warning device, second conveying pump is equipped on the pipeline of finished product tank and coating machine, second conveying pump is signal connected with early warning device and sends the flow data of second conveying pump to early warning device, early warning device is signal connected with control device, early warning device is used to send early warning signal to control device.

[0006] The pipeline between the slurry preparation tank and the slurry storage tank is sequentially provided with a third conveying pump and a second flow meter.

[0007] The pipeline between the stirring tank and the intermediate storage tank is sequentially provided with a first filter and a fourth conveying pump.

[0008] The pipeline between the grinding machine and the slurry injection tank is sequentially provided with a second filter and a peristaltic conveying pump.

[0009] The pipeline between the slurry injection tank and the finished product tank is sequentially provided with a third filter and a fifth conveying pump.

[0010] The pipeline between the fifth conveying pump and the finished product tank is provided with a damping device.

[0011] The second conveying pump is a screw conveying pump.

[0012] The second conveying pump is provided with a fourth filter.

[0013] The utility model discloses a beneficial effect is: the utility model uses the batching device and carries out batching, and the slurry preparation tank is used for preparing the slurry required by lithium battery diaphragm coating, and the slurry storage tank stores the slurry prepared from the slurry preparation tank for subsequent use, the stirring tank is used for stirring the slurry in the slurry storage tank to ensure the uniformity and stability of the slurry, the intermediate storage tank is used for temporarily storing the slurry after stirring, the grinding machine is used for further grinding treatment to the slurry to improve the fineness and uniformity of the slurry, the slurry injection tank is used for injecting the ground slurry into the finished product tank, and the finished product tank is used for storing finished product slurry and is connected with the coating machine to supply the coating machine, and the coating machine is used for coating operation on the diaphragm. In the batching process, the first conveying pump and the first flow meter between the slurry storage tank and the stirring pipe are used for adjusting and detecting the flow, the control device controls the first conveying pump according to the flow data detected by the first flow meter, the first conveying pump adjusts the flow, thereby realizing accurate slurry flow adjustment, and ensuring that the slurry is conveyed into the stirring tank according to the preset proportion and quantity. The raw material quality of the slurry preparation tank, the batching proportion data, and the coating speed of the coating machine are all sent to the control device, and the control device can adjust the raw material quality of the slurry preparation tank, the batching proportion and the coating speed of the coating machine according to the set data. The early warning device can monitor the flow data of the second conveying pump and the temperature data of the slurry between the intermediate storage tank and the grinding machine, and when the detected data is not within the set range, the early warning device sends a warning signal to the control device, and the control device adjusts and controls the operation of the batching device.

[0014] The utility model discloses the automatic operation of batching device through control device and early warning device, and the production efficiency is improved obviously, and accurate batching can be realized, the stability of the discharge of coating machine is controlled, uniform coating is realized, the stability and consistency of product quality are ensured, and energy consumption and raw material waste are reduced.

[0015] As preferred, a third delivery pump and a second flow meter are arranged on the pipeline between the pulp making tank and the pulp storage tank, the third delivery pump is a power delivery pump, used for delivering the pulp from the pulp making tank to the pulp storage tank and controlling the flow of the delivery.

[0016] As preferred, a first filter is arranged between the stirring tank and the intermediate storage tank, the first filter is a conventional metal filter, used for removing impurities and particles in the pulp.

[0017] As preferred, a third filter is arranged on the pipeline between the pulp injection tank and the finished product tank, used for multiple filtration, to ensure the highest purity and uniformity of the pulp before entering the finished product tank. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of a lithium battery diaphragm coating precise batching system according to an embodiment of the present application.

[0019] In the figure: 1-pulp making tank, 2-third delivery pump, 3-second flow meter, 4-pulp storage tank, 5-first delivery pump, 6-first flow meter, 7-stirring tank, 8-first filter, 9-fourth delivery pump, 10-intermediate storage tank, 11-grinding machine, 12-second filter, 13-peristaltic delivery pump, 14-pulp injection tank, 15-third filter, 16-fifth delivery pump, 17-damping device, 18-finished product tank, 19-second delivery pump, 20-fourth filter, 21-coating machine, 22-early warning device, 23-regulating device. DETAILED DESCRIPTION

[0020] The present application will be described in detail below in conjunction with the drawings and specific embodiments.

[0021] A lithium battery diaphragm coating precise batching system according to an embodiment of the present application is as shown in Figure 1As shown, it comprises a batching device, a control device 23 and a warning device 22, the batching device comprises a pulp preparation tank 1, a pulp storage tank 4, a stirring tank 7, an intermediate storage tank 10, a grinder 11, a pulp injection tank 14 and a finished product tank 18 connected in sequence through pipelines, the finished product tank 18 is connected with a coating machine 21 through a pipeline, a first conveying pump 5 and a first flow meter 6 are arranged on the pipeline between the pulp storage tank 4 and the stirring tank 7, the pulp preparation tank 1, the first conveying pump 5, the first flow meter 6 and the coating machine 21 are signal connected with the control device 23, the first flow meter 6 sends the detected flow data to the control device 23, and the control device 23 is used for controlling the feeding of the pulp preparation tank 1, the flow of the first conveying pump 5 and the discharging of the coating machine 21; a temperature sensor (not shown in the figure) is arranged on the pipeline between the intermediate storage tank 10 and the grinder 11, the temperature sensor is signal connected with the warning device 22 and sends the temperature data to the warning device 22, a second conveying pump 19 is arranged on the pipeline of the finished product tank 18 and the coating machine 21, the second conveying pump 19 is signal connected with the warning device 22 and sends the flow data of the second conveying pump 19 to the warning device 22, and the warning device 22 is signal connected with the control device 23, and the warning device 22 is used for sending a warning signal to the control device 23.

[0022] A third conveying pump 2 and a second flow meter 3 are arranged in sequence on the pipeline of the pulp preparation tank 1 and the pulp storage tank 4. A first filter 8 and a fourth conveying pump 9 are arranged in sequence on the pipeline between the stirring tank 7 and the intermediate storage tank 10. A second filter 12 and a peristaltic conveying pump 13 are arranged in sequence on the pipeline between the grinder 11 and the pulp injection tank 14. A third filter 15 and a fifth conveying pump 16 are arranged in sequence on the pipeline between the pulp injection tank 14 and the finished product tank 18. A damping device 17 is arranged on the pipeline between the fifth conveying pump 16 and the finished product tank 18. The second conveying pump 19 is a screw conveying pump. A fourth filter 20 is arranged after the second conveying pump 19.

[0023] In the batching device, the pulp preparation tank 1 is used for preparing the slurry required for coating the lithium battery separator; the pulp storage tank 4 stores the prepared slurry from the pulp preparation tank for subsequent use; the stirring tank 7 is used for stirring the slurry in the pulp storage tank to ensure the uniformity and stability of the slurry; the intermediate storage tank 10 is used for temporarily storing the stirred slurry; the grinder 11 is used for further grinding the slurry to improve the fineness and uniformity of the slurry; the pulp injection tank 14 is used for injecting the ground slurry into the finished product tank; the finished product tank 18 is used for storing the finished product, and is connected with the coating machine 21 to supply the coating machine 21 with materials, and the coating machine 21 is used for coating the separator.

[0024] Power delivery and flow control: A third delivery pump 2 and a second flow meter 3 are installed on the pipeline between the pulp preparation tank 1 and the pulp storage tank 4. The third delivery pump 2 is a power delivery pump, which is used to deliver the pulp from the pulp preparation tank 1 to the pulp storage tank 4 and control the flow rate.

[0025] A first delivery pump 5 and a first flow meter 6 are installed on the pipeline between the pulp storage tank and the stirring pipe. The first delivery pump 5 and the first flow meter 6 are connected to the control device 23, which controls the first delivery pump 5 according to the flow data detected by the first flow meter 6, so that the first delivery pump 5 adjusts the flow rate, thereby achieving precise pulp flow regulation and ensuring that the pulp is delivered to the stirring tank 7 according to the preset proportion and quantity.

[0026] Filtering and delivery optimization: A first filter 8 is installed between the stirring tank 7 and the intermediate storage tank 10. The first filter 8 is a conventional metal filter, which is used to remove impurities and particles in the pulp. A second filter 12 and a peristaltic delivery pump 13 are installed on the pipeline between the grinding machine 11 and the grouting tank 14, which further ensures the purity of the pulp and realizes precise delivery control through the peristaltic delivery pump 13.

[0027] Multi-filtering and high-efficiency delivery: A third filter 15 is installed on the pipeline between the grouting tank 14 and the finished product tank 18, which is used for multiple filtering to ensure that the pulp reaches the highest purity and uniformity before entering the finished product tank. The combination of the third filter 15 and the fifth delivery pump 16 ensures the stability and efficiency of the pulp during delivery.

[0028] Intelligent control and management: The entire system is intelligently managed by the control device 23 and the early warning device 22. The control device 23 and the early warning device 22 can be equipped with PLC or touch screen operation interfaces, which facilitate users to set parameters, monitor operating status and diagnose faults, etc. The control device can automatically adjust the operating status and delivery volume of the equipment according to the preset process parameters and real-time data, realizing precise batching and efficient production.

[0029] The damper device 17 installed on the pipeline between the grouting tank 15 and the finished product tank 18 can reduce the vibration of the material liquid. The damper device is usually composed of one or more springs and dampers, which can absorb energy and convert it into heat energy or other forms of useless energy, thereby preventing the propagation of vibration. In the diaphragm pulp system, the damper device can exist in various forms, such as shock absorbers, bumpers, etc., all of which can achieve the purpose of reducing vibration and impact. The damper device plays an important role in the lithium battery diaphragm coating precise batching system, as it can reduce vibration, reduce impact, reduce noise, and improve system stability, ensuring the accuracy and reliability of the coating process.

[0030] The following is the model and manufacturer of each device used in this embodiment:

[0031] Slurry tank: Pelletron, Model: 500L

[0032] Third transfer pump: Graco, Quantum i30;

[0033] Second flow meter: Mayd, Model: MAYD-3070, online concentration monitoring and automatic feeding control system, suitable for flow meter of lithium battery separator coating precise batching system;

[0034] Slurry storage tank: Pelletron, 1000L;

[0035] First transfer pump: SANDPIPER's pneumatic double diaphragm pump (AODD), which performs well in lithium battery production, its unique online gas distribution system (ESADS+PLUS) makes maintenance more convenient;

[0036] First flow meter: Shanghai Guanghua, Model: LD series electromagnetic flow meter;

[0037] Stirring tank: Dongguan Ruijing, double planetary stirrer: with two stirring shafts, it can realize more complex mixing and dispersion effect; stirring paddle type (scraping type) and additional functions are customized;

[0038] First filter: Lehler series lithium battery slurry filter, which is a stainless steel basket filter suitable for filtering and separating lithium battery slurry;

[0039] Fourth transfer pump: Graco, MQ001;

[0040] Intermediate storage tank: Pelletron, 1500L;

[0041] Grinder: IKN, ERS2000, nano grinding and dispersion;

[0042] Second filter: Shengbanghe, SO-DT-GL-DN3004-0;

[0043] Peristaltic transfer pump: Smith, KZ25 large flow peristaltic pump;

[0044] Slurry injection tank: Pelletron, 500L;

[0045] Third filter: Shengbanghe, SO-DT-GL-DN3004-0;

[0046] Fifth transfer pump: Graco, DDA200-4;

[0047] Damping device: Bosch Rexroth, Germany;

[0048] Finished product tank: Pelletron, 1000L;

[0049] Second delivery pump: screw pump, Far East Pump Industry, its product model 3GR36X6W2, screw pump has stable delivery, no pulsation, low noise and other characteristics, suitable for high viscosity medium delivery;

[0050] Fourth filter: Shengbang, SO-GL-DN3004-07 lithium battery coating slurry coating high-efficiency dynamic filtration system;

[0051] Coating machine: Japan Fuji (FUJI), Fuji C7 series;

[0052] Early warning device: Schneider Electric (Schneider Electric);

[0053] Regulation and control device: DCS (Distributed Control System).

[0054] The utility model discloses a regulation and control device collects and controls the data of slurry production, the raw material quality of pulping tank, the data of batching proportion, and the coating speed of coating machine are all sent to the regulation and control device, and in the production process, the on -the -spot data can be comprehensively collected by combining sensor, camera and other internet of things equipment, including but not limited to mixing uniformity, coating thickness, production line speed and other key parameters. Ensure that the sensor and other equipment have high precision and stability, can reflect the state of production process in real time, accurately.

[0055] After data acquisition, the collected data can be efficiently integrated through cloud platform or local server to form a complete production data chain. Deeply mine and analyze the data by applying big data analysis and machine learning algorithms, and identify abnormal patterns and potential problems in the production process. The analysis results are displayed in the form of charts, dashboards, etc. for intuitive display, which facilitates operators to quickly understand the production status. The threshold of key indicators can be set, and once the data exceeds the normal range, visual or audible reminders will be given. For example, if the flow or temperature data detected by the early warning device is not within the set range, an alarm will be issued, and the alarm information will be sent to the regulation and control device, which will regulate the batching device.

[0056] During production, according to production data and analysis results, formulate accurate control strategy, including batching proportion, mixing speed, coating speed and other parameter adjustment rules; Control strategy needs to fully consider production efficiency, product quality and cost, etc. to achieve comprehensive optimization. Establish an automatic adjustment system to adjust the relevant parameters of production equipment in real time according to the control strategy; Ensure that the adjustment system has the ability of fast response and stable control, and can correct the deviation in the production process in time. Real-time monitoring of adjustment effect, continuously optimize control strategy according to feedback data; Through continuous learning and experience accumulation, improve the accuracy and stability of the adjustment system.

[0057] In actual operation, feedback and optimization can also be carried out: based on historical data and machine learning algorithms, a risk prediction model is constructed to identify potential production failures or quality problems. Quantitative assessment is made on the identified risks to determine their severity and likelihood. Set the warning threshold, when the risk indicator reaches or exceeds the threshold, trigger the warning mechanism. The warning method can be SMS, email, APP push, etc., to ensure that the information can be timely conveyed to the relevant personnel. Develop emergency response procedures and clearly define the responsibilities and operation steps of each link. Once the warning information is received, immediately start the emergency response process and take appropriate measures to handle it to prevent the problem from further deteriorating.

[0058] Record and improve: record the process and results of each warning and emergency response to provide a basis for subsequent improvement and optimization. Regularly evaluate and improve the warning system to improve its accuracy and reliability.

[0059] Advantages and application prospects: (1) Improve production efficiency: through the application of automation and intelligent technology, significantly improve production efficiency and reduce labor costs. (2) Ensure product quality: accurate batching and uniform coating ensure the stability and consistency of product quality. (3) Intelligent control system can optimize production processes, reduce energy consumption and waste of raw materials. (4) Enhance environmental friendliness: reduce waste and pollutant emissions to improve the environmental friendliness of the production process.

[0060] In summary, the new intelligent lithium battery separator coating precise batching system integrates advanced Internet of Things technology, data analysis algorithms and machine learning algorithms to achieve intelligent monitoring, intelligent control and intelligent warning of the production process. These functions work together to improve production efficiency, product quality and safety, bringing significant benefits to the lithium battery manufacturing industry.

Claims

1. A lithium battery separator coating precision dosing system characterized by: It include dosing device, control device and early warning device, dosing device includes pulp tank, slurry tank, mixing tank, intermediate tank, grinder, grouting tank and finished product tank connected by pipeline in turn, finished product tank is connected with coating machine through pipeline, first delivery pump and first flowmeter are equipped on the pipeline between slurry tank and mixing tank, the pulp tank, first delivery pump, first flowmeter, coating machine are connected with control device through signal, first flowmeter sends the flow data detected to control device, control device is used for controlling the feeding of pulp tank, the flow of first delivery pump and the discharging of coating machine, temperature sensor is equipped on the pipeline between intermediate tank and grinder, temperature sensor is signal connected with early warning device and sends temperature data to early warning device, second delivery pump is equipped on the pipeline of finished product tank and coating machine, second delivery pump is signal connected with early warning device and sends the flow data of second delivery pump to early warning device, early warning device is signal connected with control device, early warning device is used for sending early warning signal to control device.

2. The lithium battery separator coating precision compounding system of claim 1, wherein: Third delivery pump and second flowmeter are equipped on the pipeline of the pulp tank and slurry tank in turn.

3. The lithium battery separator coating precision compounding system of claim 1, wherein: First filter and fourth delivery pump are equipped on the pipeline between mixing tank and intermediate tank in turn.

4. The lithium battery separator coating precision compounding system of claim 1, wherein: Second filter and peristaltic delivery pump are equipped on the pipeline between grinder and grouting tank in turn.

5. The lithium battery separator coating precision compounding system of claim 1, wherein: Third filter and fifth delivery pump are equipped on the pipeline between grouting tank and finished product tank in turn.

6. The lithium battery separator coating precision compounding system of claim 5, wherein: Damping device is equipped on the pipeline between fifth delivery pump and finished product tank.

7. The lithium battery separator coating precision compounding system of claim 1, wherein: Second delivery pump is screw delivery pump.

8. The lithium battery separator coating precision compounding system of claim 1, wherein: Fourth filter is equipped after second delivery pump.

Images