Crude foil additive automatic control device

Abstract

The invention discloses an automatic control device for a crude foil additive, and relates to the technical field of electrolytic copper foils. The device comprises a liquid preparation barrel, a liquid storage barrel, a control system, an online monitoring system and an electrolysis system, a feeding hopper is arranged above the liquid preparation barrel, and a stirring paddle is arranged in the liquid preparation barrel; the bottom of the liquid preparation barrel is connected with a liquid storage barrel; the liquid storage barrel is connected with the high-level tank through a pipeline; the high-level tank is connected with an electrolysis system through a pipeline; an additive is prepared through the liquid preparation barrel and stored in the liquid storage barrel, the online monitoring system monitors the technological parameter conditions of the additive in the liquid preparation barrel and the liquid storage barrel and transmits the monitored technological parameter information to the control system in a communication mode, and the control system controls and adjusts parameter data of the liquid preparation barrel and the liquid storage barrel after receiving an instruction. According to the invention, the effective concentration of the additive in the electrolyte can be fed back through the performance of the electrolytic copper foil, and different types of additives can be automatically added in real time according to the result, so that the required effective concentration of various additives in the electrolyte can be maintained.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic copper foil, and in particular to an automatic control device for raw foil additives. Background Art

[0002] At present, electrolytic copper foil mainly uses electrolytic copper or wire return materials of equivalent purity as raw materials, which are dissolved in acidic solution to prepare copper-containing electrolyte. The copper-containing electrolyte is filtered and impurities are removed, then transported to the clean liquid tank, and then mixed with a small amount of additives in the clean liquid tank and transported to the electrolytic cell. Finally, the copper-containing electrolyte is electrolyzed in the electrolytic cell to obtain electrolytic copper foil. Although the dosage of the added additives is small, the type, amount and degree of dispersion of the additives directly affect the composition and properties of the electrolyte, and then affect the key indicators of the electrolytic copper foil such as roughness, mechanical properties and surface quality. Since the volume of the clean liquid tank during the additive mixing process can reach 30m 3 The above, while the mass volume ratio of additives to electrolyte is only 1-100㎎ / L, or even 1-1000μg / L. Therefore, the amount of additives added of different types needs to be more accurate, and the degree of dispersion of additives in electrolyte should be maintained well to avoid affecting the performance and quality of electrolytic copper foil. In the prior art, additives and a certain solvent are generally first prepared into additive dilution, and then the additive dilution is atomized and dispersed in the electrolyte at a certain flow rate to achieve accurate additive addition and good dispersion.

[0003] However, due to the complex components of raw foil additives in lithium battery copper foil and the poor stability of some additives, some additives will fail in the electrolyte. The existing technology can achieve a certain degree of automated addition of additives, but it is still difficult to monitor the effective concentration of additives in the electrolyte. Generally, the effective concentration of additives in the electrolyte is monitored by indirect methods. For example, the electrolyte is manually taken every one or two minutes for Hull cell proofing, and the effective concentration of additives in the electrolyte is determined according to the performance of the proofed copper foil; or the effective concentration of additives in the electrolyte is determined by cyclic voltammetry stripping (CVS). These methods all have a certain hysteresis, and the effective concentration results of additives in the monitored electrolyte have a certain delay. It is difficult to display the effective concentration of additives in time to guide production to adjust the amount of additives added in real time, which hinders the production of high-end electrolytic copper foil with higher performance consistency requirements. In addition, the labor cost of the existing technology is high, and human errors may be introduced, affecting the production quality and efficiency of electrolytic copper foil.

[0004] Therefore, it is necessary to design an automatic control device for raw foil additives, which can feedback the effective concentration of additives in the electrolyte through the performance of the electrolytic copper foil, and automatically add different types of additives in real time according to the results to maintain the required effective concentration of various additives in the electrolyte. Summary of the invention

[0005] The invention aims at solving the problems in the prior art and provides an automatic control device for raw foil additives.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] The invention discloses an automatic control device for raw foil additives, comprising a liquid preparation barrel, a liquid storage barrel, a control system, an online monitoring system and an electrolysis system; a feeding funnel is arranged above the liquid preparation barrel, and a stirring paddle is arranged inside the liquid preparation barrel; the bottom of the liquid preparation barrel is connected with the liquid storage barrel through a pipeline; the liquid storage barrel is connected with a high-level tank through a pipeline; the high-level tank is connected with the electrolysis system through a pipeline; the additive is prepared through the liquid preparation barrel and stored in the liquid storage barrel, the online monitoring system monitors the process parameters of the additive in the liquid preparation barrel and the liquid storage barrel, and transmits the monitored process parameter information to the control system by means of communication, and the control system controls and adjusts the parameter data of the liquid preparation barrel and the liquid storage barrel after receiving the instruction.

[0008] Based on the above technical solution, further, the number of the feeding funnels is set to 2-4, and one additive is added through each feeding funnel.

[0009] Based on the above technical solution, further, a first control valve is provided on the pipeline connecting the liquid dispensing tank and the liquid storage tank, and the control system controls the switch of the first control valve in a wireless or wired manner.

[0010] Based on the above technical solution, further, a second control valve is provided on the pipeline connecting the liquid storage barrel and the high-level tank, and the control system controls the switch of the second control valve in a wireless or wired manner.

[0011] Based on the above technical solution, further, the electrolysis system includes copper foil, a cathode roller, an electrolytic cell and a stripping roller. The copper foil enters the electrolytic cell under the joint action of the stripping roller and the cathode roller, and the cathode roller is installed in the electrolytic cell.

[0012] Based on the above technical solution, further, the electrolytic cell contains electrolyte, and the electrolyte flows through the pipeline connecting the electrolytic cell and the high-level tank.

[0013] Based on the above technical solution, further, the online monitoring system includes an X-ray copper foil basis weight detector and a gloss meter, wherein the X-ray copper foil basis weight detector detects the basis weight of the copper foil, and the gloss meter performs non-destructive testing on the gloss of the copper foil.

[0014] Based on the above technical solution, further, the control system includes an actuator and a controller, the actuator is provided with a sensor, and the actuator is arranged at the outlet position of the liquid distribution barrel and the liquid storage barrel, the actuator controls the addition and shutdown of the additive; the controller calculates the volume or weight of the additive added to the high-level tank from the liquid storage barrel through the basis weight and glossiness of various electrolytic copper foils fed back by the sensor, and the actuator performs the additive addition operation; when the required basis weight and glossiness of the electrolytic copper foil are reached, the actuator stops the addition operation in real time, thereby realizing automatic control of the raw foil additive.

[0015] Based on the above technical solution, further, a sensor is provided in the controller, and the controller gives process parameters for producing different electrolytic copper foils according to the types of electrolytic copper foils produced; and calculates the required amount of additives through the feedback signal of the sensor and the preset process parameters, and realizes automatic control of the additives through the actuator.

[0016] Based on the above technical solution, further, the control system also includes a safety alarm system, which automatically alarms when a fault or abnormal situation occurs, wherein the fault or abnormal situation at least includes that the liquid level of the additive in the storage tank is lower than the set liquid level height and the delivery pipeline is blocked.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The present invention can provide feedback on the effective concentration of additives in the electrolyte through the performance of the electrolytic copper foil, and automatically add different types of additives in real time according to the results to maintain the required effective concentration of various additives in the electrolyte.

[0019] (2) The present invention sets an online monitoring system at the copper foil that first comes out of the electrolyte. The data therein can be used to timely adjust the amount of various additives by integrating the basis weight and glossiness data and comparing the set basis weight and glossiness target parameters, thereby improving the timeliness of data monitoring and real-time monitoring, and can timely adjust the control parameters to improve the accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the control device of the present invention;

[0021] Figure 2 This is a system control flow chart of the control device of the present invention;

[0022] Figure numerals: 1. feeding funnel; 2. liquid preparation barrel; 3. stirring paddle; 4. control system; 5. online monitoring system; 6. liquid storage barrel; 7. first control valve; 8. second control valve; 9. high-level tank; 10. electrolyte; 11. electrolytic cell; 12. cathode roller; 13. stripping roller; 14. copper foil; 15. pipeline. DETAILED DESCRIPTION

[0023] The present invention is further described and illustrated below in conjunction with the accompanying drawings and specific embodiments. The technical features of each embodiment of the present invention can be combined accordingly without conflicting with each other.

[0024] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The technical features in each embodiment of the present invention can be combined accordingly without conflicting with each other.

[0025] In the description of the present invention, it is to be understood that when an element is considered to be "connected" to another element, it may be directly connected to the other element or indirectly connected, that is, there are intermediate elements. On the contrary, when an element is said to be "directly" connected to another element, there are no intermediate elements.

[0026] Example

[0027] Combination Figure 1 and Figure 2 As shown, the present invention provides an automatic control device for raw foil additives, which sets an online monitoring system at the copper foil that first comes out of the electrolyte. The data there can be used to timely adjust the addition amount of various additives by integrating the data of basis weight and glossiness, and comparing the set basis weight and glossiness target parameters, thereby improving the timeliness of data monitoring and real-time monitoring, and can timely adjust the control parameters to improve the accuracy of the measurement results. Specifically, the device includes a liquid preparation barrel 2, a liquid storage barrel 6, a control system 4, and an online monitoring system 5. The additive is prepared through the liquid preparation barrel 2 and stored through the liquid storage barrel 6. The online monitoring system 5 monitors the additive-related process parameters of the liquid preparation barrel 2 and the liquid storage barrel 6, and transmits the monitored parameter information to the control system 4. After receiving the command, the control system 4 controls and adjusts the parameter data of the liquid preparation barrel 2, and the parameter data of the liquid storage barrel 6 is also adjusted synchronously. Among them, the control system 4 is connected to the online monitoring system 5 in a wired or wireless manner.

[0028] In this embodiment, a feeding funnel 1 for various additives is provided above the liquid preparation barrel 2, and a stirring paddle 3 is provided inside the liquid preparation barrel 2, wherein multiple feeding funnels 1 can be provided, preferably 2-4, and each feeding funnel 1 is used to add an additive, so that different types of additives can be added to maintain the effective concentration required for various additives in the electrolyte 10. The structure of the stirring paddle 3 can be various, such as the blade can be spiral, rod-shaped, etc. The starting method of the stirring paddle 3 is an existing means, and manual stirring can be selected, or an external motor drive can be selected, and it is not limited to a certain driving method here. The setting of the stirring paddle 3 can achieve the effect of mixing various additives and solvents and ensuring the uniform distribution of additives.

[0029] In this embodiment, the bottom of the liquid preparation barrel 2 is connected to the inlet of the liquid storage barrel 6 through the pipeline 15. After the additive is stirred and mixed in the liquid preparation barrel 2, it enters the liquid storage barrel 6 through the pipeline 15. The outlet of the liquid storage barrel 6 is connected to the high-level tank 9 through the pipeline 15, and the high-level tank 9 is connected to other external related structures. Specifically, a first control valve 7 is provided on the pipeline 15 connecting the liquid preparation barrel 2 and the liquid storage barrel 6, and the flow rate of the additive flowing from the liquid preparation barrel 2 to the liquid storage barrel 6 can be controlled by the first control valve 7. A second control valve 8 is provided on the pipeline 15 connecting the liquid storage barrel 6 and the high-level tank 9, and the flow rate of the additive flowing from the liquid storage barrel 6 to the high-level tank 9 can be controlled by the second control valve 8. Among them, both the first control valve 7 and the second control valve 8 can select solenoid valves.

[0030] In this embodiment, the electrolysis system includes a cathode roller 12, an electrolytic cell 11 and a stripping roller 13. The electrolytic cell 11 contains an electrolyte 10, and the electrolyte 10 is circulated through a pipe 15 connected between the electrolytic cell 11 and the high-level tank 9. The copper foil 14 enters the electrolytic cell 11 under the joint action of the stripping roller 13 and the cathode roller 12. In the electrolytic cell 11, an insoluble material is used as an anode, and the cathode roller 12 with the bottom immersed in the electrolyte 10 and rotating at a constant speed is used as a cathode. The electrolyte 10 can be selected from copper sulfate electrolyte 10, etc. The copper in the solution is deposited on the surface of the cathode roller 12 to form the copper foil 14, and the thickness of the copper foil 14 is controlled by the cathode current density and the rotation speed of the cathode roller 12; the specific electrolysis process is conventional means, and no more records are made here.

[0031] In this embodiment, the online monitoring system 5 integrates an X-ray copper foil 14 basis weight detector and a gloss meter, and can perform non-destructive testing on the basis weight and glossiness of the copper foil 14. The online monitoring system 5 is also provided with a data storage module, a data comparison module, and a data judgment module. The data storage module and the data comparison module are connected by communication, and the data comparison module and the data judgment module are connected by communication. The data storage module is used to store online monitoring data, such as basis weight data and glossiness data, etc. The data storage module transmits the data to the data comparison module for comparison, and transmits the comparison result to the data judgment module. The data judgment module compares and judges the received data with the set basis weight or glossiness target parameter threshold, and adjusts the addition amount of various additives according to the judgment result. Among them, the additives can be automatically added by selecting three sets of external devices corresponding to brightener, leveling agent, and positioning agent, and the addition instruction is controlled by the control system.

[0032] Specifically, the detection process of the X-ray copper foil 14 basis weight detector is divided into two stages: the first stage: obtain the length L, width H and weight G data of the copper foil 14, and the specific units of the corresponding data are selected and set according to the actual situation, and the area S and basis weight G1 of the copper foil 14 are calculated, then the area S = L × H, the basis weight The first basis weight threshold G2 that meets the required requirements is set, and the allowable error range is set to ±10% G2. When the calculated basis weight G1 is within the error range, it can be considered to be in a lossless state. When it is not within the error range, it is corrected according to the correction process, specifically: the corrected basis weight f=0.1(L×H), where f is the correction coefficient; this correction process reduces the problem of large errors in the final basis weight G1 calculation result due to inaccurate area calculation of the irregularly shaped copper foil 14 or other situations, thereby improving the accuracy of the calculation result. Then the corrected basis weight G1' is compared with the first basis weight threshold G2 again, and the operation is repeated. Second stage: When the number of repetitions is 5 times, the corrected basis weight G1' still does not meet the required comparison conditions, then the first basis weight threshold G2 is adjusted to determine whether all the data of the basis weight G1' after the last two corrections fall within the range of ±15% G2 of the first basis weight threshold G2. If they all fall within, it is considered general damage, but it does not affect the test results. If any of the corrected data does not fall within, it is considered to be damaged and is discarded or retested.

[0033] In this embodiment, the detection principle of the gloss meter is as follows: during the production process of the electrolytic copper foil 14, the gloss data of the rough surface and the smooth surface of the electrolytic copper foil 14 are collected in real time by the gloss meter; the gloss data of the rough surface and the smooth surface of the electrolytic copper foil 14 are summed to obtain the gloss parameter D, and the first comparison parameter D1, the second comparison parameter D2 and the adjustment amount d are set. If D1≤D≤D2, the gloss parameter D meets the required conditions. When the gloss parameter D is no longer within this range, the current gloss parameter D plus the adjustment amount d and the current gloss parameter D minus the adjustment amount d are calculated and the two data are respectively compared with the range of [D1, D2]. Comparison is performed. If the adjusted data falls within the range, the data falling within the range will be selected, wherein the selection criteria are: when only one adjusted data falls within the range, the data will be selected, and the situation is considered to be a general damage situation, but will not affect the entire detection process; when both adjusted data fall within the range, the larger data will be selected, and the situation is considered to be a general damage situation, but will not affect the entire detection process; when neither of the adjusted data falls within the range, it is considered to be damaged, and at this time, the steps can be repeated for detection and verification, or the amount of additive added can be adjusted through the control system 4 to meet the corresponding detection conditions.

[0034] In this embodiment, the control system 4 includes a sensor, a controller, an actuator and a safety alarm system. The control system 4 is connected to the liquid preparation barrel 2, the liquid storage barrel 6 and the online detection system. Specifically, 1. The sensor is set in the liquid preparation barrel 2, the liquid storage barrel 6 and each actuator, which is used to monitor the basis weight, glossiness, additive temperature, additive pH value, additive liquid level / weight and other process technical parameters of the electrolytic copper foil 14 in real time. 2. The controller can give the process parameters for producing different electrolytic copper foils 14 according to the type of electrolytic copper foil 14 produced; then, according to the feedback signal of the sensor and the preset process parameters, the required amount of additive is calculated, and the automatic control of the additive is realized through the actuator. 3. The actuator is arranged at the outlet of the liquid dispensing barrel 2 and the liquid storage barrel 6; the actuator is composed of a solenoid valve and a metering pump with metering function, among which the use of the solenoid valve and the metering pump are conventional means, which will not be recorded here in detail, and the amount of additive added can be 1mL / min-1000mL / min; the actuator can control the addition and closing of the additive, such as a solenoid valve and a metering pump with metering function; the controller calculates the volume / weight of the additive added from the liquid storage barrel 6 to the high-level tank 9 through the basis weight and glossiness of various electrolytic copper foils 14 fed back by the sensor, and then the actuator performs the additive addition operation; when the required basis weight and glossiness of the electrolytic copper foil 14 are reached, the actuator stops the addition operation in real time, thereby realizing the automatic control of the raw foil additive. 4. The purpose of the safety alarm system is to ensure the safe and stable operation of the entire automatic control device. When the entire automatic control device fails or has an abnormal situation, such as the liquid level of the additive storage barrel 6 is too low, the conveying pipeline is blocked, etc., the system can automatically alarm and take corresponding protective measures to prevent accidents.

[0035] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. An automatic control device for raw foil additives, characterized in that: Including liquid preparation tank, liquid storage tank, control system, online monitoring system and electrolysis system; A feeding funnel is provided above the liquid preparation barrel, and a stirring paddle is provided inside the liquid preparation barrel; the bottom of the liquid preparation barrel is connected to a liquid storage barrel through a pipeline; the liquid storage barrel is connected to a high-level tank through a pipeline; the high-level tank is connected to the electrolysis system through a pipeline; The additives are prepared through the preparation barrel and stored in the liquid storage barrel. The online monitoring system monitors the process parameters of the additives in the preparation barrel and the liquid storage barrel, and transmits the monitored process parameter information to the control system by communication. After receiving the instructions, the control system controls and adjusts the parameter data of the preparation barrel and the liquid storage barrel.

2. The automatic control device for raw foil additives according to claim 1, characterized in that: The number of the feeding funnels is set to 2-4, and one additive is added through each feeding funnel.

3. The automatic control device for raw foil additives according to claim 1, characterized in that: A first control valve is arranged on the pipeline connecting the liquid dispensing tank and the liquid storage tank, and the control system controls the switch of the first control valve in a wireless or wired manner.

4. The automatic control device for raw foil additives according to claim 1, characterized in that: A second control valve is arranged on the pipeline connecting the liquid storage barrel and the high-level tank, and the control system controls the switch of the second control valve in a wireless or wired manner.

5. The automatic control device for raw foil additives according to claim 1, characterized in that: The electrolysis system comprises a copper foil, a cathode roller, an electrolytic cell and a stripping roller. The copper foil enters the electrolytic cell under the joint action of the stripping roller and the cathode roller, and the cathode roller is installed in the electrolytic cell.

6. The automatic control device for raw foil additives according to claim 5, characterized in that: The electrolytic cell contains electrolyte, which circulates through the pipeline connecting the electrolytic cell and the high-level tank.

7. The automatic control device for raw foil additives according to claim 1, characterized in that: The online monitoring system includes an X-ray copper foil basis weight detector and a gloss meter, wherein the X-ray copper foil basis weight detector detects the basis weight of the copper foil, and the gloss meter performs non-destructive detection on the gloss of the copper foil.

8. The automatic control device for raw foil additives according to claim 7, characterized in that: The control system includes an actuator and a controller. The actuator is provided with a sensor and is arranged at the outlet position of the liquid distribution barrel and the liquid storage barrel. The actuator controls the addition and closing of the additive. The controller calculates the volume or weight of the additive added to the high-level tank from the liquid storage barrel through the basis weight and glossiness of various electrolytic copper foils fed back by the sensor, and the actuator performs the additive addition operation. When the required basis weight and glossiness of the electrolytic copper foil are reached, the actuator stops the addition operation in real time, thereby realizing automatic control of the raw foil additive.

9. The automatic control device for raw foil additives according to claim 8, characterized in that: The controller is provided with a sensor, and the controller sets the process parameters for producing different electrolytic copper foils according to the types of electrolytic copper foils produced; and calculates the required amount of additives through the feedback signal of the sensor and the preset process parameters, and realizes automatic control of the additives through the actuator.

10. The automatic control device for raw foil additives according to claim 1, characterized in that: The control system also includes a safety alarm system, which automatically alarms when a fault or abnormal situation occurs, wherein the fault or abnormal situation at least includes that the liquid level of the additive in the storage tank is lower than the set liquid level height and the delivery pipeline is blocked.

Images