A multi-power supply device anode tank and its power supply control method

Abstract

This invention relates to the field of copper foil manufacturing technology, specifically to a multi-power supply device anode tank and its power supply control method. The multi-power supply device anode tank includes a tank body with a cavity, a cathode roller, an anode structure, a power supply assembly, and a central controller disposed within the cavity. The anode structure has multiple anode partitions along the rotation direction of the cathode roller. The power supply assembly includes multiple power modules corresponding to the number of anode partitions. Each anode partition is equipped with at least one ion concentration monitoring device. Both the ion concentration monitoring device and the power supply module are electrically connected to the central controller to feed back the real-time ion concentration of each anode partition to the central controller. The central controller independently adjusts the power supply to the anode partitions corresponding to each power module based on the real-time feedback data, so that the real-time copper ion deposition amount of multiple anode partitions tends to be consistent, thereby avoiding premature failure of the anode plate due to excessively rapid local reaction, reducing the loss of the anode structure, and improving the quality of the copper foil.

Description

Technical Field

[0001] This invention relates to the field of copper foil manufacturing technology, specifically to a multi-power supply device anode tank and its power supply control method. Background Technology

[0002] Electrolytic copper foil is a key basic material for high-end products such as lithium-ion batteries and printed circuit boards, and its core production equipment is the foil-making machine. Traditional electrolytic copper foil making machines use a single, high-power DC power supply to power the entire anode tank (usually a titanium anode tank with multiple insoluble anodes distributed inside), which has the following drawbacks.

[0003] Due to the physical characteristics of the electrolyte entering from the bottom and exiting from the top, and being distributed between the anode plate and the cathode roller, the copper ion concentration at the inlet of the anode tank is usually higher than that at both ends far from the inlet. In order to meet the rate requirements of copper foil production, the overall current density has to be increased, which leads to violent reactions on the anode plates on both sides of the inlet, and the lifespan of the anode plates on both sides of the inlet often does not reach the normal lifespan.

[0004] For large-diameter, high-speed foil production machines, the above-mentioned anode tank has the following drawbacks: low energy utilization, poor conductivity uniformity of the anode plates, and the anode plates on both sides of the liquid inlet fail the fastest. As a result, the overall service life of the anode plates does not reach the original design service life. The copper foil edge effect is obvious and the microstructure of the copper foil is inconsistent, affecting its tensile strength, elongation and other key indicators. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-power supply device anode tank and its power supply control method, aiming to solve the technical problems of high scrap rate and uneven copper deposition caused by local failure of anode plate when electrodepositing copper layers on large-area titanium rollers in existing anode tanks.

[0006] To achieve the above objectives, the present invention provides a multi-power supply device anode tank, including a tank body with a cavity and a cathode roller, an anode structure, a power supply assembly, and a central controller disposed within the cavity. The anode structure has multiple anode partitions along the rotation direction of the cathode roller. The power supply assembly includes multiple power modules corresponding to the number of anode partitions. Each anode partition is provided with at least one ion concentration monitoring device. The ion concentration monitoring device and the power supply module are both electrically connected to the central controller. The central controller controls the output parameters of the corresponding power supply module based on the feedback data from the ion concentration monitoring device.

[0007] Optionally, the anode structure includes a substrate and a plurality of anode plates. The substrate has a liquid inlet in the middle. Along the rotation direction of the cathode roller, a plurality of anode plates are spliced ​​and arranged on both sides of the liquid inlet. At least one ion concentration monitoring device is provided between two adjacent anode plates. An anode partition includes half of the area of ​​two adjacent anode plates.

[0008] Optionally, the number of anode partitions is set to 3 to 12.

[0009] Optionally, the power supply assembly further includes multiple electrical monitoring sensors, each of which is connected to a power module and corresponds to an anode partition, to monitor the actual electrical parameters of each anode partition.

[0010] Optionally, the electrical monitoring sensor is configured as a current sensor or a voltage sensor.

[0011] Optionally, the power supply assembly further includes a multi-channel signal input module, which is electrically connected to the central controller and the multiple power supply modules respectively.

[0012] Optionally, the multiple signal input module includes multiple independent D / A converters and voltage / current conditioning circuits equal to the number of anode partitions, to independently adjust the input current or voltage of each anode partition.

[0013] This invention also proposes a power supply control method for a multi-power supply device anode tank, applied to the aforementioned multi-power supply device anode tank. The control method includes the following steps: Obtain the real-time ion concentration of each of the aforementioned anode zones; By comparing the real-time ion concentration of each anode partition with the target ion concentration, a concentration deviation signal corresponding to each anode partition is generated; Based on the concentration deviation signal, the corresponding power module is controlled to adjust its output electrical parameters so that the output electrical parameters reach the preset parameter values, so that the real-time ion concentration distribution of the multiple anode zones reaches the target ion concentration distribution.

[0014] Optionally, the electrical parameter is current or voltage; if the concentration deviation signal is less than the target threshold, the current or voltage is increased; if the concentration deviation signal is greater than the target threshold, the current or voltage is decreased.

[0015] Optionally, a current deviation signal or a voltage deviation signal is calculated based on the concentration deviation signal; the current setting value of the power module of each anode zone is dynamically adjusted to reach a preset value based on the current deviation signal, or the voltage setting value of the power module of each anode zone is dynamically adjusted to reach a preset value based on the voltage deviation signal.

[0016] The multi-power supply device anode tank of the present invention includes a tank body with a cavity, a cathode roller, an anode structure, a power supply assembly, and a central controller disposed within the cavity. The anode structure has multiple anode partitions along the rotation direction of the cathode roller. The power supply assembly includes multiple power modules corresponding to the number of anode partitions. Each anode partition is provided with at least one ion concentration monitoring device. Both the ion concentration monitoring device and the power supply module are electrically connected to the central controller to feed back the real-time ion concentration of each anode partition to the central controller. The central controller independently adjusts the power supply to the corresponding anode partitions through each power module based on the real-time feedback data, reducing the reaction rate difference (the difference between the maximum and minimum thickness) of each anode plate, so that the real-time ion concentration distribution of each anode partition reaches the target ion concentration distribution, thereby making the real-time copper ion deposition amount of each anode partition tend to be consistent. This avoids premature failure of the anode plate due to excessively fast local reaction, and can also actively compensate for edge effects, achieving high consistency of the reaction rate of the copper foil along the rotation direction of the cathode roller, and also making the grain growth environment of the copper foil consistent across the entire width, thereby improving the uniformity of its tensile strength, elongation, and other mechanical properties. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the multi-power supply device anode groove structure of the present invention.

[0018] Figure 2 for Figure 1 A partially enlarged structural diagram of the Q section.

[0019] Figure 3 This is a schematic diagram of the control circuit structure of the anode slot of the multi-power supply device of the present invention.

[0020] Figure 4 This is a schematic diagram of the gradient power supply distribution and copper ion concentration distribution in the anode tank of the multi-power supply device of the present invention.

[0021] Figure 5 This is a schematic diagram of the power supply distribution and copper ion concentration distribution in the anode cell under the existing single power supply method.

[0022] In the diagram: 100, multi-power supply device anode tank; 10, tank body; 10A, liquid inlet; 20, ion concentration monitoring device; 30, anode plate; 40, power supply module; 50, cathode roller; 51, cathode conductive ring; 60, central controller. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer and more understandable, the technical solutions of this invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0024] This invention provides a multi-power supply device anode tank 100, which is applied in the field of electrolytic copper foil production machine technology.

[0025] The uniformity and stability of power supply in the anode tank of the foil-making machine directly determine the thickness consistency, mechanical properties, and surface quality of the copper foil. For large-diameter, high-speed foil-making machines, a single power supply cannot adapt to the differences in current demand caused by slight variations in conductivity and electrode spacing at different positions of the cathode roller 50. Regarding edge effects: Due to the chemical reaction characteristics of current distribution between the anode plate 30 and the cathode roller 50, the copper ion concentration at the inlet of the anode tank during production is usually higher than that at both ends far from the center of the cathode roller 50. This results in the fastest failure of the anode plates 30 on both sides of the inlet 10A, leading to poor conductivity uniformity of the anode plates 30. Regarding energy utilization: To meet the rate requirements of copper foil production, traditional electrolytic copper foil-making machines have to increase the overall current density, causing violent reactions on both sides of the inlet 10A. The lifespan of the anode plates 30 on both sides of the inlet 10A often does not reach the normal lifespan, resulting in the overall service life of the anode plates 30 not reaching the originally designed service life.

[0026] like Figures 1 to 3 As shown, in order to achieve the above objectives, the present invention provides a multi-power supply device anode tank 100, including a tank body 10 with a cavity, a cathode roller 50 disposed in the cavity, an anode structure, a power supply assembly, and a central controller 60. The anode structure has multiple anode partitions along the rotation direction of the cathode roller 50. The power supply assembly includes multiple power modules 40 corresponding to the number of anode partitions. Each anode partition is provided with at least one ion concentration monitoring device 20. The ion concentration monitoring device 20 and the power modules 40 are both electrically connected to the central controller 60. The central controller 60 controls the output parameters of the corresponding power modules 40 according to the real-time feedback data of the ion concentration monitoring device 20.

[0027] The multi-power supply device anode tank 100 of the present invention obtains the current real-time ion concentration of any anode zone through an ion concentration monitoring device 20. The ion concentration monitoring device 20 is used to monitor the copper ion concentration in the electrolyte. The ion concentration monitoring device 20 is connected to a central controller 60 to feed back the real-time ion concentration of each anode zone to the central controller 60. The central controller 60 adjusts the power supply to each anode zone independently through multiple power modules 40 based on the real-time feedback data, reducing the reaction rate difference (the difference between the maximum and minimum thickness) of each anode plate 30, so that the real-time ion concentration distribution of each anode zone reaches the target ion concentration distribution, so that the real-time copper ion deposition rate of each anode zone tends to be consistent, thereby avoiding premature failure of the anode plate due to excessively fast local reaction. It can actively compensate for edge effects, achieve high consistency of the reaction rate of copper foil along the rotation direction of cathode roller 50, and also make the grain growth environment of copper foil consistent across the entire width, thereby improving the uniformity of its tensile strength, elongation and other mechanical properties.

[0028] Optionally, the anode structure includes a substrate and several anode plates 30. The substrate has an inlet 10A in the middle. Along the rotation direction of the cathode roller 50, several anode plates 30 are spliced ​​and arranged on both sides of the inlet 10A. At least one ion concentration monitoring device 20 is provided between two adjacent anode plates 30. An anode partition includes half of the area of ​​two adjacent anode plates 30.

[0029] In this embodiment, all anode plates 30 are insoluble anode plates 30. The cavity inside the tank 10 is divided by a substrate into an electrolysis cavity for containing electrolyte and a wiring cavity. The cathode roller 50 serves as a continuously rotating cathode. The cathode roller 50 is mounted on the central axis of the tank 10 and located directly above the electrolysis cavity. The cathode roller 50 rotates around its axial direction. Multiple insoluble anode plates 30 are arranged side by side along the axial direction of the cathode roller 50 on the substrate inside the tank 10. Ion concentration monitoring devices 20 are provided between each anode plate 30, achieving physical and electrical partitioning. The number of power supply modules 40 matches the number of anode partitions. Each power supply module 40 is a DC power supply module 40 and is independently controllable. The positive output terminal of each power supply module 40 is connected to a corresponding anode partition (an anode partition is the area filled with copper sulfate solution between two adjacent anode plates 30, i.e., an anode partition includes half of the area of ​​each of the two adjacent anode plates 30). The negative output terminals of all DC power supply modules 40 are connected to the cathode roller 50. Specifically, the negative output terminals of multiple power supply modules 40 can be connected to the cathode conductive ring 51 of the cathode roller 50. By independently supplying power to multiple anode partitions through multiple power supply modules 40, independent and precise power supply to different sections of the anode tank 100 of the multi-power supply device is achieved, forming an adjustable potential and current density gradient, thereby correcting the copper foil deposition rate. It can actively compensate for edge effects, achieve high consistency of the reaction rate of copper foil along the rotation direction of the cathode roller 50, reduce the reaction rate difference (difference between the maximum and minimum thickness) of each anode plate 30, extend the overall service life of the anode plate 30, and reduce the scrap loss of the anode plate 30 due to local failure.

[0030] Furthermore, the central controller 60 includes a memory, a processor, and a power supply control program stored in the memory and executable on the processor. When executed by the processor, the power supply control program implements the steps of the power supply control method for the multi-power supply device anode tank 100, as described below. The central controller 60 is communicatively connected to all DC power supply modules 40, and the control loop of the multi-power supply device anode tank 100 is referenced. Figure 3As shown, it includes a power control circuit and an ion concentration feedback circuit. The copper ion concentration monitoring unit 20 is used for online real-time monitoring of the copper ion concentration of the electrolyte at different positions along the rotation direction of the cathode roller 50, and feeds back the real-time monitored copper ion concentration data to the central controller 60. Specifically, the central controller 60 is configured to dynamically adjust the output current or voltage of each DC power module 40 based on the copper ion concentration distribution data along the rotation direction of the cathode roller 50 fed back by the concentration monitoring unit (ion concentration monitoring unit 20), so that the copper ion concentration distribution conforms to a preset target distribution.

[0031] Optionally, the number of anode partitions can be set to 3 to 12.

[0032] In this embodiment, the anode partition is set to multiple partitions. Depending on the number or length of the anode plates 30, one anode plate 30 can use one ion concentration monitoring device 20, two adjacent anode plates 30 can share a single ion concentration monitoring device 20 located between them, or multiple anode plates 30 can share a single ion concentration monitoring device 20. In this embodiment of the invention, two adjacent anode plates 30 can share a single ion concentration monitoring device 20 located between them.

[0033] An exemplary anode partition can be set to 3-12 (to accommodate electrolytic copper foil production machines with different diameters such as 1.3m, 1.5m, 2.16m, 2.7m, 3m, and 3.6m). Setting as many anode partitions as possible allows for intensive monitoring of changes in copper ion concentration. This enables dynamic adjustment of the output current or voltage of each DC power module 40 based on the copper ion concentration distribution data, ensuring that the copper ion concentration distribution meets the preset target.

[0034] Exemplary reference Figures 1 to 4 Multiple anode partitions are evenly distributed on both sides of the liquid inlet 10A, and can be designated as 30a, 30b, 30c, 30d, 30e, 30f, 30g, 30h, 30i, 30j, 30k, and 30l; multiple power modules 40 can be designated as 40a, 40b, 40c, 40d, 40e, 40h, 40i, 40j, 40k, and 40l respectively; the number of anode partitions corresponds to the number of power modules 40, and their naming is not unique.

[0035] Furthermore, the liquid inlet 10A is a strip-shaped through hole, and its length extension direction is parallel to the axial direction of the cathode roller 50. The length extension direction of the anode plate 30 is parallel to the extension direction of the liquid inlet 10A, and the extension direction of each anode section is in the same direction as the length extension direction of the anode plate 30. Along the rotation direction of the cathode roller 50, an anode section includes half of the area of ​​each of two adjacent anode plates 30. One ion concentration monitoring element 20 can be installed between two adjacent anode plates 30 to monitor the copper ion concentration of the anode section, or multiple ion concentration monitoring elements 20 can be installed to monitor the copper ion concentration of the anode section, as needed.

[0036] Optionally, the power supply assembly also includes multiple electrical monitoring sensors, each connected to a power module 40 and corresponding to an anode partition, to monitor the actual electrical parameters of each anode partition.

[0037] Optionally, the electrical monitoring sensor may be configured as a current sensor or a voltage sensor.

[0038] In this embodiment, a voltage sensor or current sensor is installed on the output circuit of each power module 40 to monitor the actual electrical parameters of each anode zone and feed them back to the central controller 60. The central controller 60 has a built-in gradient power supply control algorithm, which can dynamically calculate and output the independent current or voltage setpoints of each zone's DC power module 40 according to a preset thickness target curve or real-time thickness feedback data, thereby forming the required current density gradient distribution in the direction parallel to the cathode roller 50 in the anode groove.

[0039] Optionally, the power supply assembly also includes a multi-signal input module, which is connected to the central controller 60 and multiple power modules 40 respectively.

[0040] Optionally, the multi-signal input module includes multiple independent D / A converters and voltage / current conditioning circuits to independently adjust the input current or voltage of each anode zone.

[0041] In this embodiment, the multi-power supply device anode tank 100 is equipped with a conductive copper busbar corresponding to each power module 40. The multi-signal input module is equipped with a related unidirectional input module on each independently powered conductive copper busbar to ensure that the current transmission direction is unidirectional, thus ensuring the normal operation of the independent power module 40. The current sensor or voltage sensor feeds back real-time monitoring data to the central controller 60. The central controller 60 outputs current or voltage adjustment signals to the power module 40 and the multi-signal input module to achieve independent and precise power supply to different anode zones in the anode tank. The multi-signal input module can be configured as multiple unidirectional modules equal to the number of anode zones, each connected to the corresponding conductive copper busbar. Alternatively, it can be a combined module with multiple paths corresponding to multiple power modules 40. This combined multi-signal input module has multiple loops connected to the corresponding conductive copper busbars.

[0042] The present invention also proposes a power supply control method for the anode tank 100 of the above-mentioned multi-power supply device. The control method includes the following steps: acquiring the real-time ion concentration of each anode zone; comparing the real-time ion concentration of each anode zone with the target ion concentration to generate a concentration deviation signal corresponding to each anode zone; controlling the corresponding power supply module 40 to adjust its output electrical parameters according to the concentration deviation signal so that the output electrical parameters reach the preset parameter value; so that the real-time ion concentration distribution of each anode zone reaches the target ion concentration distribution, thereby making the real-time copper ion deposition rate of each anode zone tend to be consistent.

[0043] In this embodiment, the preset parameter value is the electrical parameter required for quantitative copper deposition. In order to make the real-time ion concentration distribution of each anode partition reach the target ion concentration distribution, so that the real-time copper ion deposition rate of each anode partition tends to be the same, a target ion concentration is set for each anode partition. The target ion concentration of multiple anode partitions as a whole presents the preset target ion concentration distribution, that is, the real-time electrical parameter value of multiple anode partitions reaches the target electrical parameter value required by the corresponding anode partition, that is, the output of the power module 40 is adjusted according to the real-time ion concentration data.

[0044] Specifically, the real-time ion concentration of each anode zone is compared with the target ion concentration to generate a concentration deviation signal for each anode zone. Based on the concentration deviation signal, the corresponding power supply module 40 is controlled to adjust its output electrical parameters so that the output electrical parameters reach the preset parameter values. The concentration deviation signal generated for each anode zone indicates the difference between the current real-time ion concentration and the target ion concentration. The difference in electrical parameters is then calculated based on this ion concentration difference, and the output electrical parameters are adjusted accordingly. The adjustment method involves controlling the corresponding power supply module 40 to adjust its output electrical parameters so that the output electrical parameters reach the preset parameter values, thereby providing feedback to adjust the current real-time ion concentration until the current real-time ion concentration infinitely approaches the target ion concentration, thus achieving a current real-time copper ion deposition rate that infinitely approaches the target copper ion deposition rate.

[0045] Furthermore, the electrical parameters are current or voltage. If the concentration deviation signal is less than the target threshold, the current or voltage is increased; if the concentration deviation signal is greater than the target threshold, the current or voltage is decreased.

[0046] In this embodiment, the concentration deviation signal can be a calculated difference or a calculated ratio. The following uses the concentration deviation signal as the calculated ratio of the real-time ion concentration to the target ion concentration. The target threshold can be a single point value or a range of values ​​close to the left and right of the target ion concentration. If the target ion concentration is set as the point value f0 and the real-time ion concentration as f1, then the left end of the target threshold is less than f0, and the right end is greater than f0.

[0047] For example, when the target threshold is set to a point value, i.e., the target threshold is set to f0, if f1 / f0 < 1, the real-time ion concentration is less than the target ion concentration. At this time, the current or voltage should be increased to compensate for the reaction rate, thereby stabilizing the amount of copper deposition. If f1 / f0 > 1, the real-time ion concentration is greater than the target ion concentration. At this time, the current or voltage should be decreased to stabilize the reaction rate, thereby ensuring the consistency of the amount of copper deposition.

[0048] When the target threshold is set to a value within a similar range to the target ion concentration, the target threshold can be set to {0.95f0, 1.05f0}. When f1 / f0 < 0.95f0, the current or voltage should be increased to accelerate the reaction rate and thus increase the amount of copper deposition. When f1 / f0 > 1.05f0, the current or voltage should be decreased to slow down the reaction rate and thus reduce the amount of copper deposition.

[0049] Set the target threshold as a range value, and the target threshold for each anode zone can be set to be consistent or can fluctuate left and right, with the core being to get as close as possible to the target ion concentration.

[0050] Optionally, a current deviation signal or a voltage deviation signal can be calculated based on the concentration deviation signal; the current setting value of each anode zone power module 40 can be dynamically adjusted to reach a preset value based on the current deviation signal, or the voltage setting value of each anode zone power module 40 can be dynamically adjusted to reach a preset value based on the voltage deviation signal.

[0051] Furthermore, the copper ion concentration monitoring device 20 is used to monitor the copper ion concentration of the electrolyte at different positions in the rotation direction of the cathode roller 50 in real time online. It can also calculate the thickness of the copper foil produced at that position. The thickness of the copper foil can also be monitored by a copper foil surface density meter, and the thickness of the generated copper foil is used as a parameter for monitoring.

[0052] The calculation of concentration and voltage or current is performed according to the following formula. Theoretically, the theoretical current intensity of each anode zone is: .

[0053] Explanation of parameters in the formula: d: copper foil thickness; I: current intensity; t: electrolysis time (i.e., the effective deposition time of a point on the cathode roller 50 in the electrolyte); η: current efficiency (the actual efficiency of copper deposition, usually very high, >95%); M: molar mass of copper (63.546 g / mol); n: number of electrons transferred by copper ions (Cu... 2+ →Cu, n=2); F: Faraday constant (96485 C / mol); ρ: density of copper (approximately 8.96 g / cm³). 3 A: Effective deposition area of ​​cathode roller 50 (related to liquid level and roller width).

[0054] The thickness can be monitored by scanning or calculated from the current real-time ion concentration of each anode zone. The following thickness determination formula, derived from the basic principles of electrochemistry, does not consider production efficiency and only calculates the deposition amount.

[0055] Calculation formula: In this formula, the current intensity I and the electrolysis time t are the two major operating variables that directly determine the thickness.

[0056] In this embodiment, the step of repeatedly acquiring the real-time ion concentration of each anode zone and adjusting the output of the power module 40 according to the real-time ion concentration can be further subdivided as follows.

[0057] S1: System initialization, the central controller 60 loads basic process parameters (such as target copper ion concentration (target average copper ion concentration), product specifications, electrolyte parameters) and initial gradient power supply mode (such as uniform compensation mode, edge suppression mode).

[0058] S2: Start the electrolytic copper foil production machine. The DC power supply modules 40 of each zone output according to the initial setting value (the initial setting value can be equal to the electrical parameters required for quantitative copper deposition, i.e., the preset parameter value).

[0059] S3: Obtain the real-time concentration distribution of copper ions along the rotation direction of the cathode roller 50; the copper ion concentration monitoring device 20 collects the real-time concentration distribution of copper ions in each corresponding area along the axial direction of the cathode roller 50 (if copper foil thickness data is needed, the copper foil thickness data can be calculated according to the above formula) and uploads it to the central controller 60.

[0060] S4: The central controller 60 compares the measured copper ion concentration distribution with the target ion concentration distribution to generate the concentration deviation signal corresponding to each anode zone, that is, to calculate the current or voltage deviation vector.

[0061] S5: Based on the copper ion concentration deviation signal, independently calculate and send control commands to the corresponding DC power supply module 40 to adjust its output electrical parameters. That is, the central controller 60 dynamically adjusts the current (or voltage) setpoint of each zone DC power supply module 40 according to the current deviation using a preset control algorithm (such as PID algorithm, fuzzy control or model predictive control). The adjustment principle is: for areas where the measured and calculated values ​​are too high, appropriately lower the current of the corresponding zone; for areas where the measured and calculated values ​​are too low, appropriately increase the current of the corresponding zone.

[0062] S6: The power supply modules 40 of each anode zone respond and adjust, changing the current density of each anode zone, thereby correcting the copper foil deposition rate.

[0063] S7: Repeat steps S3-S6 to form a closed-loop control, so that the copper foil thickness distribution continues to converge within the target range.

[0064] By iteratively executing the above steps, closed-loop control of anode consumption uniformity can be achieved.

[0065] Reference Figure 4 and Figure 5 As shown, Figure 4 To determine the gradient power supply distribution 80 and copper ion concentration distribution 70 of the anode cell after using the multi-power supply device anode cell 100, Figure 5 Using the multi-power supply device for the anode cell 100, which provides gradient power distribution 80' and copper ion concentration distribution 70' under the existing single power supply method, has the following beneficial effects.

[0066] 1. Significantly improves thickness uniformity: By providing independent power to different zones, edge effects can be actively compensated, achieving high consistency in the reaction rate of the copper foil in the longitudinal direction (along the rotation direction of the cathode roller 50), reducing the reaction rate difference (difference between the maximum and minimum thickness) of each anode plate 30 by 30%-60%.

[0067] 2. Improve overall product performance: Taking current as an example, a uniform current density distribution makes the grain growth environment of copper foil consistent across the entire width, thereby improving the uniformity of its mechanical properties such as tensile strength and elongation.

[0068] 3. Energy saving and consumption reduction: While ensuring that the thinnest point meets the standard, it can reduce over-deposition in the edge area, saving about 5%-15% of the overall power consumption, while reducing unnecessary consumption of copper raw materials.

[0069] 4. Intelligent and flexible: The system can flexibly switch between different gradient power supply modes according to the process requirements of different specifications (such as ultra-thin copper foil and standard copper foil) to achieve one-click production change.

[0070] 5. Improve production stability: The closed-loop control system can automatically adapt to minor changes in operating conditions, reduce manual intervention, and improve production stability and yield.

[0071] In this invention, if terms such as "inner", "outer", "upper", "lower" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in, it is only for the convenience of describing this application and simplifying the description, and is not intended to 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.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "fix," and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0073] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "enclosed" does not exclude the presence of components or steps not listed in the claims. The word "one" or "a" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words "first," "second," and "third," etc., does not indicate any order. These words can be interpreted as names.

[0074] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A multi-power supply device anode tank, characterized in that, The device includes a tank with a cavity, a cathode roller, an anode structure, a power supply assembly, and a central controller disposed within the cavity. The anode structure has multiple anode partitions along the rotation direction of the cathode roller. The power supply assembly includes multiple power modules corresponding to the number of anode partitions. Each anode partition is provided with at least one ion concentration monitoring device. The ion concentration monitoring device and the power supply module are both electrically connected to the central controller. The central controller controls the output parameters of the corresponding power supply module based on the feedback data from the ion concentration monitoring device.

2. The multi-power supply device anode tank according to claim 1, characterized in that, The anode structure includes a substrate and several anode plates. The substrate has a liquid inlet in the middle. Along the rotation direction of the cathode roller, several anode plates are spliced ​​and arranged on both sides of the liquid inlet. At least one ion concentration monitoring device is provided between two adjacent anode plates. An anode partition includes half of the area of ​​two adjacent anode plates.

3. The anode tank for the multi-power supply device according to claim 1, characterized in that, The number of anode partitions is set to 3 to 12.

4. The anode tank for the multi-power supply device according to claim 1, characterized in that, The power supply assembly also includes multiple electrical monitoring sensors, each of which is connected to a power module and corresponds to an anode partition, in order to monitor the actual electrical parameters of each anode partition.

5. The anode tank for the multi-power supply device according to claim 4, characterized in that, The electrical monitoring sensor is configured as a current sensor or a voltage sensor.

6. The multi-power supply device anode tank according to claim 1, characterized in that, The power supply assembly also includes a multi-channel signal input module, which is electrically connected to the central controller and multiple power supply modules respectively.

7. The multi-power supply device anode tank according to claim 6, characterized in that, The multi-channel signal input module includes multiple independent D / A converters and voltage / current conditioning circuits, equal in number to the number of anode partitions, to independently adjust the input current or voltage of each anode partition.

8. A power supply control method for a multi-power supply device anode tank, applied to a multi-power supply device anode tank as described in any one of claims 1 to 7, characterized in that, The control method steps include: Obtain the real-time ion concentration of each of the aforementioned anode zones; By comparing the real-time ion concentration of each anode partition with the target ion concentration, a concentration deviation signal corresponding to each anode partition is generated; Based on the concentration deviation signal, the corresponding power module is controlled to adjust its output electrical parameters so that the output electrical parameters reach the preset parameter values, so that the real-time ion concentration distribution of the multiple anode zones reaches the target ion concentration distribution.

9. The multi-power supply device anode tank power supply control method according to claim 8, characterized in that, The electrical parameter is current or voltage. If the concentration deviation signal is less than the target threshold, the current or voltage is increased; if the concentration deviation signal is greater than the target threshold, the current or voltage is decreased.

10. The multi-power supply device anode tank power supply control method according to claim 8, characterized in that, The current deviation signal or voltage deviation signal is calculated based on the concentration deviation signal; the current setting value of the power module of each anode zone is dynamically adjusted to reach the preset value based on the current deviation signal, or the voltage setting value of the power module of each anode zone is dynamically adjusted to reach the preset value based on the voltage deviation signal.

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