Copper foil production system and method

Abstract

The invention discloses a copper foil production system and method.The copper foil production system comprises an electrolytic bath and a cathode roller arranged in the electrolytic bath and further comprises a partition anode module, a partition cooling module, a detection module and a control system; the partitioned anode module comprises a plurality of anode assemblies which are arranged along the axial direction of the cathode roller, and an electric control module which is respectively connected with each anode assembly; the subarea cooling module comprises a plurality of cooling structures which are arranged in the cathode roller and are in one-to-one correspondence with the anode subareas, and a cooling control module which is respectively connected with each cooling structure; the control system is electrically connected with the electric control module, the cooling control module and the detection module. According to the method, differentiated cooperative control of partition current and cooling can be intelligently executed according to the source and size of supersaturation degree deviation, so that rapid directional compensation is performed at any axial position, and the defects of response lag and extensive regulation and control in a traditional mode are effectively overcome.

Description

Technical Field

[0001] This invention relates to the field of copper foil production technology, and specifically to a copper foil production system and method. Background Technology

[0002] As a core material in electronic circuits and lithium-ion batteries, the uniformity and consistency of copper foil's properties directly determine the quality and reliability of downstream products. Traditional copper foil electrolytic production systems typically employ an integrated anode and a unified cathode roller cooling design. However, in actual production, the inherent non-uniformity of the electrolyte flow field, electric field, and temperature field along the axial distribution of the cathode roller leads to differences in the deposition rate and crystal morphology of copper ions in different regions of the cathode roller surface. This difference causes problems such as uneven copper foil thickness, inconsistent density, and fluctuations in tensile strength, especially pronounced in the production of high-end ultra-thin copper foil.

[0003] To address the above issues, patent CN212647306U provides an automatic adjustment control system for the horizontal bar of a copper foil production machine. This system includes a detection device, a processing platform, and a drive control device. The copper foil production machine produces copper foil and transports it to the detection device. The detection device detects the transported copper foil data and uploads it to the processing platform. The processing platform processes the data and transmits it to the drive control device, which controls the valve's movement. The copper foil production machine then feeds back the valve's movement signal to the processing platform via the drive control device. By detecting the data of the finished copper foil, this system controls the valve opening, forming a closed-loop control system.

[0004] However, the above methods rely on detecting the thickness of the formed copper foil and then adjusting macroscopic parameters such as the flow rate or pressure of the electrolyte, resulting in a response lag. Furthermore, they cannot directly intervene in and control the core mechanism parameters of the copper ion electrodeposition process, making it difficult to address crystal morphology issues caused by microscopic inhomogeneities in the electric and temperature fields. Both control precision and timeliness are limited. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a copper foil production system and method to solve the technical problems of response lag, limited control accuracy and timeliness in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a copper foil production system, including an electrolytic cell and a cathode roller disposed within the electrolytic cell, further including a partitioned anode module, a partitioned cooling module, a detection module, and a control system; the partitioned anode module includes a plurality of anode assemblies arranged axially along the cathode roller, and an electrical control module respectively connected to each of the anode assemblies, wherein multiple anode partitions are formed within the electrolytic cell through the anode assemblies; the partitioned cooling module includes a plurality of cooling structures disposed inside the cathode roller and corresponding one-to-one with the anode partitions, and a cooling control module respectively connected to each of the cooling structures; the detection module is disposed in the electrolytic cell and is used to collect the current density, cathode roller surface temperature, electrolyte concentration, and copper foil thickness of each anode partition; the control system is electrically connected to the electrical control module, the cooling control module, and the detection module, and is used to calculate the supersaturation of each anode partition based on the detection data using a built-in model, and adjust the current density and / or temperature of the corresponding anode partition based on the deviation between the supersaturation and the target value.

[0007] In some embodiments, the electrolytic cell is provided with a plurality of partitioned liquid inlet pipes and partitioned liquid outlet pipes communicating with it, and the plurality of partitioned liquid inlet pipes and partitioned liquid outlet pipes are respectively provided for each of the anode partitions.

[0008] In some embodiments, the cooling structure includes a cooling tank disposed inside the cathode roller and an inlet cooling pipe and an outlet cooling pipe communicating with the cooling tank, and the cooling control module includes a flow regulating valve installed on the inlet cooling pipe.

[0009] In some embodiments, the detection module includes a current density sensor, a temperature sensor, a concentration sensor, and a thickness measuring instrument. The current density sensor is disposed in each of the anode zones and is used to detect the current density of each anode zone; The detection end of the temperature sensor corresponds to the surface of the cathode roller and is used to detect the surface temperature of the cathode roller. The concentration sensor is installed in each of the anode zones and is used to detect the electrolyte concentration; The thickness measuring instrument is set on the peeling path of the green foil peeling point of the cathode roller and is used to measure the lateral thickness distribution of the copper foil.

[0010] In a second aspect, the present invention also provides a method for producing copper foil, comprising the copper foil production system as described in any one of the preceding claims, the method comprising: Real-time data collection of current density, cathode roller surface temperature, electrolyte concentration, and copper foil thickness for each anode zone; Based on the collected data, the estimated supersaturation of the deposition interface corresponding to each anode zone is calculated in real time using an electrochemical mass transfer model. The oversaturation estimate of each partition is compared with the preset target value to obtain the oversaturation deviation; Differentiated collaborative control is performed based on the absolute value and source of the oversaturation deviation.

[0011] In some embodiments, the differentiated collaborative control based on the absolute value and source of the oversaturation deviation specifically includes: When the absolute value of the oversaturation deviation is greater than the first set threshold, the anode current of the corresponding anode zone is adjusted. When the absolute value of the oversaturation deviation is less than or equal to a first set threshold, the source of the deviation is analyzed, and the following operations are performed based on the source of the deviation: If the supersaturation deviation is mainly caused by temperature deviation, the coolant flow rate and anode current of the corresponding anode zone are adjusted in a coordinated manner, with the adjustment of coolant flow rate as the main control action, and the anode current is adjusted at the same time to compensate for the secondary effect of temperature change on supersaturation. If the oversaturation deviation is mainly caused by current fluctuations, then adjust the anode current of the corresponding anode zone; If the supersaturation deviation is mainly caused by uneven mass transfer, then adjust the electrolyte flow rate of the corresponding anode zone.

[0012] In some embodiments, the sources of analytical bias include: The correlation between the supersaturation deviation and the cathode roller surface temperature deviation was analyzed. If the oversaturation deviation is related to the surface temperature deviation of the cathode roller and the trend of change is the same, then it is determined that the oversaturation deviation is mainly caused by temperature disturbance. If the oversaturation deviation exists while the cathode roller surface temperature deviation is within the normal range, then analyze the correlation between the oversaturation deviation and the historical change trend of the corresponding anode zone current. If the oversaturation deviation is synchronized with the changing trend of the historical current data of the corresponding anode zone, then the deviation is determined to be mainly caused by current disturbance. If the historical current data is stable and the oversaturation deviation has a fixed spatial distribution pattern, then the deviation is determined to be mainly caused by mass transfer disturbance.

[0013] In some embodiments, when it is determined that the supersaturation deviation is mainly caused by temperature disturbance, a first operation is performed: Adjust the coolant flow rate of the corresponding anode zone to correct the cathode roller surface temperature to the target range; Simultaneously, the anode current of the corresponding anode zone is adjusted in the opposite direction to compensate for the secondary effects on the supersaturation during temperature regulation.

[0014] In some embodiments, when it is determined that the oversaturation deviation is mainly caused by current disturbance, a second operation is performed: While keeping the coolant flow rate of the corresponding anode zone constant, the anode current of the corresponding anode zone is adjusted to directly correct the supersaturation.

[0015] In some embodiments, the copper foil production system further includes partitioned liquid inlet pipes corresponding to the anode partitions, and each partitioned liquid inlet pipe is equipped with a flow control valve; When it is determined that the oversaturation deviation is mainly caused by mass transfer disturbance, the third operation is performed: The flow control valve of the corresponding anode zone is adjusted to change the local electrolyte flow rate in order to optimize the mass transfer process and correct the supersaturation.

[0016] Compared with existing technologies, the copper foil production system and method provided by this invention divides the anode in the electrolytic cell into multiple independently controlled zones through a partitioned anode module. Each zone is equipped with an independent electrical control module, achieving precise control of the electric field distribution. Simultaneously, corresponding partitioned cooling modules are provided for each anode zone. Through built-in cooling structures and control modules, the cooling effect of the cooling structure can be independently adjusted according to the actual needs of each zone, achieving precise control of the temperature field. The integrated detection module can collect key parameters such as current density, cathode roller surface temperature, electrolyte concentration, and copper foil thickness in each zone in real time, providing comprehensive data support for the control system. Based on a built-in electrochemical mass transfer model, the control system calculates the supersaturation of each zone in real time based on the detection data and dynamically adjusts the current density and / or temperature of the corresponding zone by comparing it with preset target values, achieving precise control of the copper ion electrodeposition process. This design not only significantly improves the uniformity and density of the thickness and microstructure of the entire roll of copper foil, especially ensuring the product quality of ultra-thin high-end copper foil, but also greatly reduces the occurrence of defects through source optimization, thereby improving production efficiency and product qualification rate, and reducing overall production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the copper foil production system and method provided in the embodiments of the present invention; Figure 2 This is a top view of the partitioned anode module structure of the copper foil production system and method provided in this embodiment of the invention; Figure 3 This is a top view of the partitioned cooling module of the copper foil production system and method provided in this embodiment of the invention; Figure 4 This is a schematic diagram of the electrolyte supply system structure of the copper foil production system and method provided in the embodiments of the present invention; Figure 5This is a schematic diagram of the coolant supply system structure of the copper foil production system and method provided in this embodiment of the invention. Explanation of reference numerals in the attached figures: 1. Electrolytic cell; 11. Zoned inlet pipe; 111. Flow control valve; 12. Zoned outlet pipe; 121. Electrolyte thermometer; 2. Cathode roller; 3. Zoned anode module; 31. Anode assembly; 32. Insulating spacer; 4. Zoned cooling module; 41. Cooling tank; 42. Inlet cooling pipe; 43. Outlet cooling pipe; 44. Flow regulating valve; 45. Coolant thermometer; 5. Detection module; 51. Current density sensor; 52. Temperature sensor; 53. Concentration sensor; 54. Thickness measuring instrument; 6. Electrolyte supply system; 61. Electrolyte storage tank; 62. Transfer pump; 63. Electrolyte transfer pipe; 7. Coolant supply system; 71. Coolant storage tank; 72. Circulation pump; 73. Return pipe. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] To address the technical problems of lag response, limited control accuracy and timeliness, this invention provides a copper foil production system and method. Through zone detection and modeling, the supersaturation affecting deposition quality is perceived in real time; then, the source of deviation is intelligently diagnosed, and zoned, coordinated and compensatory control of multiple parameters such as current, temperature, and flow field is executed, thereby achieving high-precision uniformity control of copper foil thickness from the root.

[0020] Please see Figure 1 In a first aspect, embodiments of this application provide a copper foil production system, including an electrolytic cell 1, a cathode roller 2 disposed within the electrolytic cell 1, a partitioned anode module 3, a partitioned cooling module 4, a detection module 5, and a control system.

[0021] Please see Figures 1 to 3The partitioned anode module 3 includes several anode assemblies 31 arranged along the axial direction of the cathode roller 2, and an electrical control module connected to each anode assembly 31. Multiple anode partitions are formed within the electrolytic cell 1 through the anode assemblies 31. The partitioned cooling module 4 includes several cooling structures disposed inside the cathode roller 2 and corresponding to each anode partition, and a cooling control module connected to each cooling structure. The detection module 5 is located in the electrolytic cell 1 and is used to collect the current density, cathode roller 2 surface temperature, electrolyte concentration, and copper foil thickness of each anode partition. The control system is electrically connected to the electrical control module, cooling control module, and detection module 5, and is used to calculate the supersaturation of each anode partition based on the detection data using a built-in model, and adjust the current density and / or temperature of the corresponding anode partition based on the deviation between the supersaturation and the target value.

[0022] In this device, the anode in the electrolytic cell 1 is divided into multiple independently controlled anode zones by the partitioned anode module 3, and each anode zone is equipped with an independent electronic control module, achieving precise control of the electric field distribution. Simultaneously, the corresponding partitioned cooling module 4 corresponds one-to-one with the anode zones. Through its built-in cooling structure and cooling control module, the cooling effect of the cooling structure can be independently adjusted according to the actual needs of each zone, achieving precise control of the temperature field. The detection module 5 can collect key parameters such as current density, cathode roller 2 surface temperature, electrolyte concentration, and copper foil thickness in each zone in real time, providing comprehensive data support for the control system. The control system is electrically connected to all electronic control modules, cooling control modules, and detection module 5. It has a built-in electrochemical mass transfer model, which can calculate the supersaturation of the deposition interface in each zone based on the real-time collected data; and by comparing the deviation of the supersaturation with the target value, it intelligently outputs control commands to drive the electronic control modules and cooling control modules to perform coordinated adjustments, thereby achieving precise control of the copper ion electrodeposition process.

[0023] Please refer to Figure 1 and Figure 2 Two sets of zoned anode modules 3 are symmetrically arranged on both sides of the electrolytic cell 1. The two sets of zoned anode modules 3 are arranged sequentially along the axial direction of the cathode roller 2. Each anode zone has two anode assemblies 31, and an insulating strip 32 is provided between the two anode assemblies 31 in two adjacent anode zones for insulation. The thickness of the insulating strip 32 is 5mm-20mm, which can effectively prevent the current from interfering with each other between adjacent anode zones and ensure that each anode zone works independently and stably.

[0024] To achieve precise lateral control of the surface temperature field of cathode roller 2, please refer to [link / reference needed]. Figure 1 and Figure 3In some possible embodiments, the cooling structure includes a cooling tank 41 disposed inside the cathode roller 2, and an inlet cooling pipe 42 and an outlet cooling pipe 43 communicating with the cooling tank 41. The position of each cooling tank 41 corresponds one-to-one with the position of the anode partition. The cooling control module is a first flow regulating valve 44 installed on the inlet cooling pipe 42. By adjusting the opening of the flow regulating valve 44, the flow rate of coolant entering each cooling tank 41 can be precisely controlled, thereby enabling independent temperature control for the heat dissipation differences in different areas of the roller surface, eliminating or reducing the impact of uneven heat distribution on the deposition rate.

[0025] Please see Figure 1 and Figure 5 Furthermore, a coolant flow meter is installed on the flow regulating valve 44 of the inlet cooling pipe 42. The coolant flow meter is used to monitor the flow rate of coolant entering the cooling tank 41 in real time. Coolant thermometers 45 are also installed on the inlet cooling pipe 42 and the outlet cooling pipe 43 to measure the temperature of the coolant entering and exiting the cooling tank 41. By comparing the temperature difference between the two, the heat dissipation of the surface area of ​​the cathode roller 2 corresponding to the cooling tank 41 can be intuitively understood.

[0026] Please see Figure 1 and Figure 4 To further optimize the electrolyte flow field within each anode zone, in some possible embodiments, the electrolytic cell 1 is equipped with several zone inlet pipes 11 and zone outlet pipes 12 connected to it, with each zone inlet pipe 11 and zone outlet pipe 12 corresponding to a specific anode zone. Each zone inlet pipe 11 is equipped with an independent flow control valve 111 and an inlet flow meter. By independently controlling the flow control valve 111 of each zone inlet pipe 11, the electrolyte flow rate entering each anode zone can be precisely adjusted, thereby optimizing the electrolyte distribution within the electrolytic cell 1. This setup enables zoned supply and discharge of electrolyte. When the control system detects mass transfer disturbances in an anode zone, it can directly change the fluid velocity and renewal rate of that local area by adjusting the inlet flow rate of the corresponding anode zone, effectively flushing the diffusion layer on the electrode surface, optimizing ion transport conditions, and thus accurately correcting the supersaturation deviation caused by uneven flow field.

[0027] Furthermore, each zone outlet pipe 12 is equipped with an electrolyte thermometer 121 to measure the temperature of the electrolyte discharged from each anode zone in real time. By comparing the temperature difference of the electrolyte on the zone inlet pipe 11 and the zone outlet pipe 12, the heat transfer efficiency of the electrolyte and the thermal effect of the chemical reaction in each anode zone can be accurately evaluated, providing data for further optimization of the electrolyte flow field and temperature field.

[0028] Please see Figure 1To provide comprehensive and accurate data support for closed-loop control, in some possible embodiments, the detection module 5 includes a current density sensor 51, a temperature sensor 52, a concentration sensor 53, and a thickness measuring instrument 54. The current density sensor 51 is located within each anode zone and is used to directly measure the real-time current density of each anode zone. The temperature sensor 52 is preferably an infrared thermal imager, with its detection end corresponding to the surface of the cathode roller 2 and facing the area of ​​the roller surface where the cathode roller 2 is about to enter the electrolyte or has just emerged from the liquid surface, used to detect the transverse temperature field on the surface of the cathode roller 2. The concentration sensor 53 is located within each anode zone and is used to monitor the concentration of copper ions and sulfuric acid in the electrolyte online, providing necessary chemical environment parameters for the supersaturation model. The thickness measuring instrument 54 is located on the peeling path of the green foil peeling point of the cathode roller 2, specifically on the peeling path after the green foil peeling point of the cathode roller 2, used to scan and measure the transverse thickness distribution of the generated copper foil. This thickness distribution data serves as the final feedback for the control effect and the basis for model calibration.

[0029] Furthermore, in some possible embodiments, the detection module 5 also includes flow meters installed on the flow regulating valve 44 and the flow control valve 111 for real-time monitoring of the flow rates of coolant and electrolyte entering the cooling tank 41 and the anode zone. It also includes thermometers installed on each cooling structure and the electrolytic cell 1 for real-time monitoring of temperature changes in the cooling structure and the electrolytic cell 1.

[0030] Further, please refer to Figure 1 , Figures 3 to 5The device also includes an electrolyte supply system 6 and a coolant supply system 7. Specifically, the electrolyte supply system 6 includes an electrolyte storage tank 61, a transfer pump 62, and several electrolyte delivery pipes 63 connected to the partition inlet pipes 11. The transfer pump 62 delivers the electrolyte in the electrolyte storage tank 61 to each partition inlet pipe 11 through the electrolyte delivery pipes 63, providing a stable electrolyte with appropriate pressure to the electrolytic cell 1. The coolant supply system 7 includes a coolant storage tank 71, a circulation pump 72, and a return pipe 73 connecting the inlet cooling pipe 42 and the coolant storage tank 71. The circulation pump 72 delivers the coolant in the coolant storage tank 71 to each cooling tank 41 through the inlet cooling pipe 42. After absorbing heat in the cooling tank 41, the coolant flows back to the coolant storage tank 71 through the outlet cooling pipe 43 and the return pipe 73 for cooling and temperature reduction, thus realizing the recycling of the coolant. A cooling device is installed in the coolant storage tank 71 to quickly cool the high-temperature coolant that returns. In this design, the electrolyte storage tank 61 supplies the same electrolyte concentration to each anode zone, and the coolant storage tank 71 supplies the same temperature of coolant to each cooling cell. The temperature regulation of the cathode roller 2 and the mass transfer regulation of the electrolyte are achieved only by adjusting the flow regulating valve 44 and the flow control valve 111. This design ensures that each anode zone and cooling structure can be independently and precisely adjusted according to actual needs, while eliminating the need for additional temperature or concentration regulation devices, which greatly simplifies the system structure.

[0031] Secondly, embodiments of this application also provide a copper foil production method, including a copper foil production system as described in any of the above embodiments, the method comprising: Real-time data collection of current density, cathode roller 2 surface temperature, electrolyte concentration, and copper foil thickness for each anode zone; Based on the collected data, the estimated supersaturation of the deposition interface corresponding to each anode zone is calculated in real time using an electrochemical mass transfer model. The oversaturation estimate of each partition is compared with the preset target value to obtain the oversaturation deviation; Differentiated collaborative control is implemented based on the absolute value and source of the oversaturation deviation.

[0032] This copper foil production method calculates the supersaturation of the deposition interface by collecting data from each anode zone in real time. It directly locks the control target onto the chemical parameters that affect the crystal quality. Based on the source and magnitude of the supersaturation deviation, it intelligently executes differentiated and coordinated control of zone current and cooling, thereby enabling rapid directional compensation at any position along the axis. This effectively overcomes the shortcomings of traditional methods, such as response lag and coarse control.

[0033] Specifically, after system startup, the system first enters the data acquisition and state estimation phase. The intelligent controller continuously collects real-time current density, corresponding cathode roller 2 surface temperature, bulk copper ion concentration in the electrolyte, and lateral thickness distribution of the green foil for each anode zone via a multi-sensor network. This data is transmitted in real-time to the controller's data processing unit via industrial Ethernet. The controller inputs the received real-time data into a built-in state observer. Based on the electrochemical-mass transfer kinetics equation, the state observer comprehensively considers the influence of current density on ion consumption rate, the promotion of ion diffusion coefficient by temperature, and the regulating effect of flow rate on mass transfer boundary layer thickness, calculating in real-time the estimated supersaturation value of the deposition interface on the cathode roller 2 surface region corresponding to each anode zone. After obtaining the supersaturation estimate for each zone, the system enters the deviation analysis and decision-making phase. The controller compares the supersaturation estimate for each zone with the optimal target value preset according to product specifications, calculating the real-time supersaturation deviation.

[0034] In some possible embodiments, differentiated collaborative control is performed based on the absolute value and source of the oversaturation deviation. Specifically, when the absolute value of the oversaturation deviation is greater than a first set threshold, it indicates a significant disturbance in the process requiring urgent intervention, and the system immediately enters a large deviation rapid correction mode. When the absolute value of the oversaturation deviation is within a small range (less than or equal to the first set threshold), it indicates that the process is in a relatively stable state, but there are minor deviations requiring fine-tuning. At this time, the system initiates a small deviation root cause diagnosis program to determine the most appropriate correction method by analyzing the source characteristics of the deviation.

[0035] When the system detects a large deviation exceeding a threshold in a certain zone, it immediately activates the large deviation rapid correction mode. This situation is usually caused by sudden factors such as abrupt changes in electrolyte concentration or power fluctuations, and if not handled promptly, it may lead to batch quality accidents. The system's primary goal at this time is to bring the process back to a safe range as quickly as possible; therefore, it prioritizes the fastest-responding control method, adjusting the anolyte current of the corresponding zone. For example, when a significantly high supersaturation is detected, the controller will immediately instruct a reduction in the anolyte current of that zone, directly weakening the electric field driving force, thereby rapidly reducing the deposition rate and interface supersaturation. Within seconds of the current intervention, the system closely monitors the correction of the supersaturation deviation. If the deviation decreases rapidly, it proceeds to the small deviation root cause diagnosis stage; if the effect is unsatisfactory, it escalates to a system alarm and may recommend reducing the production line speed to ensure quality and safety.

[0036] For minor deviations that do not exceed the threshold, the system initiates a minor deviation root cause diagnosis procedure to determine the source of the deviation. The diagnosis process employs a step-by-step elimination logic: first, the temperature parameter is checked. If the oversaturation deviation and the corresponding roller surface temperature deviation show a strong correlation in their changing trends, it is determined to be a temperature disturbance. If the temperature is normal, the current data is analyzed further. If the oversaturation deviation and the historical fluctuations of the current are highly synchronized on the time axis, it is determined to be a current disturbance. If both of the above are eliminated, and the oversaturation deviation exhibits a fixed pattern in its spatial distribution (such as always appearing at the edge or in a specific zone), it is determined to be a mass transfer disturbance.

[0037] In some possible embodiments, after initiating a small deviation root cause diagnosis program to analyze the source of the deviation, if the supersaturation deviation is mainly caused by temperature deviation, the first operation is performed: first, adjust the flow regulating valve 44 on the corresponding cooling tank 41 to control the flow rate of the coolant and adjust the roller surface temperature to the target range; at the same time, finely adjust the current of the anode zone in the opposite direction through the electronic control module to compensate for the secondary impact of temperature change on supersaturation, thereby achieving a smooth transition. If the supersaturation deviation is mainly caused by current fluctuation, the second operation is performed: the system directly adjusts the micro-amplitude anode current, using the electronic control module to adjust the current of the anode zone, quickly and accurately correcting the supersaturation; if the supersaturation deviation is mainly caused by uneven mass transfer, the third operation is performed: the system controls the inlet flow rate of the zone inlet pipe 11 through the flow control valve 111, thereby adjusting the electrolyte inlet flow rate of the corresponding zone to improve the local flow field, optimize mass transfer conditions, and fundamentally solve the problem of uneven ion supply.

[0038] The copper foil production system and method provided by this invention divides the anode in the electrolytic cell 1 into multiple independently controlled zones through a partitioned anode module 3. Each zone is equipped with an independent electrical control module, enabling precise control of the electric field distribution. Simultaneously, a corresponding partitioned cooling module 4 corresponds to each anode zone. Through its built-in cooling structure and control module, the cooling effect of the cooling structure can be independently adjusted according to the actual needs of each zone, achieving precise control of the temperature field. The integrated detection module 5 can collect key parameters such as current density, cathode roller 2 surface temperature, electrolyte concentration, and copper foil thickness in each zone in real time, providing comprehensive data support for the control system. Based on a built-in electrochemical mass transfer model, the control system calculates the supersaturation of each zone in real time based on the detection data and dynamically adjusts the current density and / or temperature of the corresponding zone by comparing it with preset target values, achieving precise control of the copper ion electrodeposition process. This design not only significantly improves the thickness uniformity and crystal morphology consistency of the copper foil but also enhances production efficiency and product quality, providing strong technical support for the preparation of high-end ultra-thin copper foil.

[0039] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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 application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0040] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A copper foil production system comprising an electrolytic cell and a cathode roll disposed within the electrolytic cell, characterized by, Also comprising: a partitioned anode module comprising a plurality of anode assemblies arranged along the cathode roller in the axial direction, and an electric control module connected to each of the anode assemblies respectively, wherein a plurality of anode partitions are formed by the anode assemblies in the electrolytic cell; a partitioned cooling module comprising a plurality of cooling structures arranged in the cathode roller and corresponding to the anode partitions respectively, and a cooling control module connected to each of the cooling structures respectively; a detection module arranged in the electrolytic cell, for collecting the current density of each anode partition, the surface temperature of the cathode roller, the concentration of the electrolyte, and the thickness of the copper foil; and a control system electrically connected to the electric control module, the cooling control module, and the detection module, for calculating the supersaturation of each anode partition through an embedded model according to the detection data, and adjusting the current density and / or the temperature of the corresponding anode partition based on the deviation of the supersaturation from a target value.

2. The copper foil production system according to claim 1, characterized by, The electrolytic cell is provided with a plurality of partitioned liquid inlet channels and partitioned liquid outlet channels in communication therewith, and the plurality of partitioned liquid inlet channels and the partitioned liquid outlet channels correspond to each of the anode partitions respectively.

3. The copper foil production system according to claim 1, characterized by, The cooling structure comprises a cooling tank arranged in the cathode roller, and a liquid inlet cooling pipe and a liquid outlet cooling pipe in communication with the cooling tank, and the cooling control module comprises a flow regulating valve installed on the liquid inlet cooling pipe.

4. The copper foil production system according to claim 1, characterized by, The detection module comprises a current density sensor, a temperature sensor, a concentration sensor, and a thickness measuring instrument, The current density sensor is arranged in each of the anode partitions, for detecting the current density of each anode partition; The detection end of the temperature sensor corresponds to the surface of the cathode roller, for detecting the surface temperature of the cathode roller; The concentration sensor is arranged in each of the anode partitions, for detecting the concentration of the electrolyte; The thickness measuring instrument is arranged on the stripping path of the foil stripping point of the cathode roller, for measuring the transverse thickness distribution of the copper foil.

5. A method for producing a copper foil, characterized by, The method comprises: collecting the current density of each anode partition, the surface temperature of the cathode roller, the concentration of the electrolyte, and the thickness of the copper foil in real time; calculating the corresponding deposition interface supersaturation estimate value of each anode partition in real time based on the collected data through an electrochemical mass transfer model; comparing the supersaturation estimate value of each partition with a preset target value to obtain a supersaturation deviation; performing differentiated collaborative control according to the absolute value and source of the supersaturation deviation.

6. The copper foil production method according to claim 5, characterized by, The differentiated collaborative control according to the absolute value and source of the supersaturation deviation specifically comprises: when the absolute value of the supersaturation deviation is greater than a first set threshold, adjusting the anode current of the corresponding anode partition; when the absolute value of the supersaturation deviation is less than or equal to the first set threshold, analyzing the source of the deviation, and performing the following operations according to the source of the deviation: if the supersaturation deviation is mainly caused by temperature deviation, then collaboratively adjusting the cooling liquid flow and the anode current of the corresponding anode partition, wherein the adjustment of the cooling liquid flow is the main control action, and the anode current is adjusted to compensate for the secondary influence of temperature change on the supersaturation; if the supersaturation deviation is mainly caused by current fluctuation, then adjusting the anode current of the corresponding anode partition. If the supersaturation deviation is mainly caused by uneven mass transfer, the electrolyte flow of the corresponding anode sub-area is adjusted.

7. The copper foil production method according to claim 6, characterized by, The analysis deviation sources include: The correlation between the supersaturation deviation and the cathode roller surface temperature deviation is analyzed. If the supersaturation deviation is correlated with the cathode roller surface temperature deviation and has the same trend, it is determined that the supersaturation deviation is mainly caused by temperature disturbance. If the supersaturation deviation exists and the cathode roller surface temperature deviation is in the normal range, the correlation between the supersaturation deviation and the change trend of the current historical data of the corresponding anode sub-area is analyzed. If the supersaturation deviation is synchronized with the change trend of the current historical data of the corresponding anode sub-area, it is determined that the deviation is mainly caused by current disturbance. If the current historical data is stable and the supersaturation deviation has a fixed spatial distribution pattern, it is determined that the deviation is mainly caused by mass transfer disturbance.

8. The copper foil production method according to claim 6, characterized by, When it is determined that the supersaturation deviation is mainly caused by temperature disturbance, the first operation is performed: The cooling liquid flow of the corresponding anode sub-area is adjusted to correct the cathode roller surface temperature to the target range; At the same time, the anode current of the corresponding anode sub-area is adjusted in the opposite direction to compensate for the secondary effect on the supersaturation during temperature adjustment.

9. The copper foil production method according to claim 6, characterized by, When it is determined that the supersaturation deviation is mainly caused by current disturbance, the second operation is performed: The anode current of the corresponding anode sub-area is adjusted to directly correct the supersaturation while keeping the cooling liquid flow of the corresponding anode sub-area unchanged.

10. The copper foil production method according to claim 6, characterized by, The copper foil production system also includes sub-area liquid inlet pipelines corresponding to the anode sub-areas, and a flow control valve is installed on each sub-area liquid inlet pipeline; When it is determined that the supersaturation deviation is mainly caused by mass transfer disturbance, the third operation is performed: The flow control valve of the corresponding anode sub-area is adjusted to change the local electrolyte flow rate to optimize the mass transfer process and correct the supersaturation.

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