CN114481232A - Electrolytic copper foil surface density uniformity online control system and control method - Google Patents
Electrolytic copper foil surface density uniformity online control system and control method Download PDFInfo
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000011889 copper foil Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000011888 foil Substances 0.000 claims abstract description 34
- 238000000926 separation method Methods 0.000 claims abstract description 21
- 238000004364 calculation method Methods 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims description 42
- 238000004519 manufacturing process Methods 0.000 claims description 29
- 230000008569 process Effects 0.000 claims description 24
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 238000001739 density measurement Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910000365 copper sulfate Inorganic materials 0.000 description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000003908 quality control method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000271935 Bitis Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/12—Process control or regulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention relates to an electrolytic copper foil surface density uniformity online control system and a control method, wherein the online control system comprises a plurality of electromagnetic flow valves which are respectively connected to a plurality of liquid separation pipelines which are arranged on an anode groove of a foil forming machine side by side along the width direction of a cathode roller of the foil forming machine; the controller is electrically connected with the plurality of electromagnetic flow valves respectively; an online thickness gauge; the system host computer is in signal connection with the online thickness gauge and the controller, and the control method for the online control system comprises the following steps: the method comprises the steps of surface density acquisition, data characteristic calculation, engineering capacity calculation and PID control. According to the online control system and the control method, the electromagnetic flow control valve arranged on the liquid separation pipeline at the corresponding position is adjusted through the feedback of the measured data of the online thickness gauge, so that the real-time monitoring and closed-loop control of the surface density of the copper foil are realized, the adjustment efficiency and the stable control precision are improved, and the requirement of producing high-standard copper foil can be met.
Description
Technical Field
The invention relates to the field of electrolytic copper foil production processes, in particular to an electrolytic copper foil surface density uniformity online control system and a control method based on the online control system.
Background
With the development of new energy industry and the vigorous demand of the market on lithium batteries, the electrolytic copper foil is one of important production materials as a current collector and a negative electrode carrier in the lithium batteries, and with the improvement of performance requirements on the capacity, the light weight and the like of the lithium batteries, a thinner electrolytic copper foil is required to be adopted, the requirement on thickness consistency is higher, and the common surface density in the production of the copper foil is measured.
At present, the production control of the surface density of the copper foil is to perform trial production after setting production process parameters, take a trial production sample along the running direction of a cathode roller to measure the surface density of the copper foil, adjust the flow of each liquid separation pipeline according to the measurement result, sample again and measure until the surface density of the copper foil reaches the standard, and start formal production. The whole production process is in open-loop control, the thickness of the copper foil cannot be monitored and adjusted in real time in the production process, the problem of batch quality is very easy to occur under the condition that the engineering capacity of equipment is insufficient or the equipment is abnormal, and particularly the requirement for producing high-standard electrolytic copper foil cannot be met at present when the requirement for the copper foil is higher and higher.
Disclosure of Invention
In view of the problems in the prior art, the invention provides an electrolytic copper foil surface density uniformity online control system and a control method based on the online control system.
The technical scheme of the invention is as follows:
an on-line control system for the surface density uniformity of electrolytic copper foil, which is integrated with an electrolytic copper foil generator, comprises:
each electromagnetic flow valve of the plurality of electromagnetic flow valves is respectively connected with a plurality of liquid separation pipelines which are arranged on an anode tank of the foil forming machine side by side along the width direction of a cathode roller of the foil forming machine;
the online thickness gauge is arranged on a forward route of the copper foil between a cathode roller and a material receiving roller of the foil forming machine, and the online thickness gauge is arranged across the width direction of the copper foil;
the controller is electrically connected with the plurality of electromagnetic flow valves respectively and is used for controlling the flow of each electromagnetic flow valve in the plurality of electromagnetic flow valves respectively;
and the system host is in signal connection with the online thickness gauge and the controller and can send a control instruction to the controller according to the surface density data fed back by the online thickness gauge.
Specifically, the plurality of electromagnetic flow valves are all PVC electromagnetic ball valves, and the online thickness gauge uses a laser thickness gauge.
And a control method based on the electrolytic copper foil surface density uniformity online control system, which is characterized by comprising the following steps of:
determining the control limit by selecting the specification range [ rho ] of copper foildn,ρup]A subset of which is used as a control limit
And an areal density acquisition step, namely controlling the online thickness gauge to perform one measurement along the width direction of the copper foil, acquiring the thickness d of the copper foil at the position of the liquid separation pipeline corresponding to the width direction, and calculating the current value of the areal density at the position of the liquid separation pipeline:
here, n represents the nth measurement process of the production process in the current measurement, and ρ is the density of copper;
a data characteristic calculation step, namely sequentially calculating the measured values of the surface density of the positions of the liquid separation pipeline corresponding to the width directionAverage of areal density measurements from pre-measurement
And standard deviation sn；
Calculating engineering capacity of the foil generator on the liquid separating pipeline according to the surface density data acquired by the online film thickness meter, and dividing the engineering capacity into sections
Wherein
In order to be the lower limit of the capacity,
is the upper capacity limit;
PID control step, namely, the engineering capacity of the crude foil machine on the liquid separation pipeline
And control limits for copper foil production
Comparison in which
In order to control the lower limit of the pressure,
in order to control the upper limit,
if it is
Without the intervention of the PID control,
if it is
Intervention in PID control;
specifically, the data characteristic calculation step is
For the liquid separation pipeline, calculating the average value of the measured values of the surface density of the liquid separation pipeline in the current measurement process as follows:
calculating the standard deviation s of the measured value of the areal density of the current measuring processj·nComprises the following steps:
wherein, TnTo calculate the intermediate quantity, i.e. the variance of the areal density measurement of the current measurement process, the subscript (n-1) indicates the result of the calculation of the corresponding data characteristic in the previous measurement step.
Specifically, the engineering capacity calculating step includes:
an initial calculation step of determining the average surface density of the copper foil with the specified thickness produced by the foil producing machine according to the previous production data or the trial run production data or the production data after the last adjustment
And standard deviation scpThen the lower limit of the capability
Upper limit of the capacity
Interval(s)
I.e. engineering capacity of the green foil machine.
Preferably, the engineering capability calculating step further includes:
in the process capacity calculating step, the calculating system calculates the average value of l data in each group from m groups of continuous data after the PID control process, wherein the average value of l data in each group has no requirement on whether the m groups of data are continuous
And standard deviation sin-pCalculating the mean value between groups
And standard deviation scr-plThen the lower limit of the capability
Upper limit of the capacity
Preferably, in the PID control step, the proportional control coefficient K is PID-controlledpStandard deviation s according to production processnDetermine the relationship of
Wherein a, b, K'pAccording to a predetermined coefficient.
Preferably, the predetermined coefficients a, b satisfy
And is
Wherein the content of the first and second substances,
is s isnThe maximum value of the history is recorded,
is s isnThe historical minimum value.
The electrolytic copper foil surface density uniformity online control system has the following advantages:
1. the thickness of the copper foil is measured through the online thickness gauge, and the electromagnetic flow control valve arranged on the liquid separating pipeline at the corresponding position is adjusted according to the feedback of the measurement data of the online thickness gauge, so that closed-loop control is realized, and the control precision can meet the requirement of producing high-standard copper foil.
2. The real-time monitoring and recording of the surface density of the copper foil can be realized by processing the measurement data of the online thickness gauge through the system host, and reference is provided for process monitoring, data analysis and quality improvement.
3. The method has the advantages that the engineering capacity of the foil forming machine can be mastered in real time, the copper foil thickness is finely controlled through the PID control principle, the control precision is guaranteed, the standard deviation index of the areal density determining the engineering capacity is bound with the proportional adjustment coefficient in the PID control, so that the control parameters can be adjusted according to the stability condition of the foil forming machine before control, the adjustment efficiency is improved, and the driving of the adjustment process is stable.
Drawings
FIG. 1 is a schematic view of the present invention installed on a green foil machine;
FIG. 2 is a schematic diagram of an online control system of the present invention;
fig. 3 is a graph of a control process of the present invention.
In the figure:
21 an anode tank; 22 a cathode roll; 23 copper foil post-treatment system; 24, a winding system; 25 a cathode roll processing device;
1, an online thickness gauge; 2, a system host; 3, a controller; 4, an electromagnetic flow valve;
a P liquid separation pipeline; w copper foil.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, in this specification, the dimensional ratios of the drawings do not represent actual dimensional ratios, and are only used for embodying the relative positional relationships and the connection relationships between the components, and the components having the same names or the same reference numbers represent similar or identical structures and are only used for illustrative purposes.
The electrolytic copper foil surface density uniformity online control system (hereinafter referred to as online control system) is arranged on the existing electrolytic copper foil generating machine and comprises an online thickness gauge 1, a system host 2, a controller 3 and a plurality of electromagnetic flow valves 4 which are respectively arranged on each liquid separating pipeline P.
Fig. 1 is a system schematic diagram of an online control system of the present invention, and fig. 2 is an installation schematic diagram of the online control system of the present invention. The core device of the electrolytic copper foil forming machine consists of an anode tank 21, a cathode roller 22 and a plurality of groups of liquid separating pipelines P for supplying copper sulfate solution, direct current is added between an anode plate and the cathode roller to promote copper to be separated out from the copper sulfate solution between the anode plate and the cathode roller and be attached to the surface of the cathode roller, the copper foil separated out on the surface of the cathode roller is output through the rotation of the cathode roller, in addition, a copper foil post-treatment system 23, a winding system 24 and a cathode roller treatment device 25 are also needed to be arranged on the forming machine, usually, after the copper foil W is output from the cathode roller, the copper foil W needs to be washed, dried and passivated by the copper foil post-treatment system in sequence to be wound into the winding roller, and the surface of the cathode roller stripped of the copper foil can enter an electrolytic reaction area again after being polished by the cathode roller treatment device 25.
The online thickness gauge is arranged on the advancing path of the copper foil between the cathode roller and the winding roller of the crude foil machine and stretches across the width direction of the copper foil, and in order to improve the detection precision of the thickness of the copper foil, the crude foil machine is preferably arranged between the passivation treatment tank and the winding roller in the advancing direction of the copper foil. The invention arranges 13 liquid inlet grooves on the anode groove along the width direction of the cathode roller at equal intervals, each liquid inlet groove is connected with an independent liquid separating pipeline, each liquid separating pipeline is provided with an electromagnetic flow valve for controlling the liquid separating pipeline, each electromagnetic flow valve is controlled by a controller in a unified way, a system host is in signal connection with the controller and the thickness gauge, a control signal is sent to the controller by receiving thickness information fed back by the thickness gauge and combining with set control parameters, and the controller adjusts the opening size of each electromagnetic flow valve according to the received control signal, thereby realizing the real-time independent control of the flow of the copper sulfate solution entering each liquid inlet pipeline. In some cases, it may be acceptable to integrate the controller and the system host into a single device, subject to field conditions or other special requirements.
The online thickness gauge of the online control system uses a laser thickness gauge, two sides of the upper surface and the lower surface of a copper foil to be measured are respectively provided with a measuring component integrating a laser transmitter and a laser receiver, the distances L1 and L2 from the upper surface and the lower surface of the copper foil to the corresponding measuring components are obtained by a laser triangulation method, and the actual thickness value of the copper foil at the point is as follows:
d＝L-(L1+L2)
here, L is the distance between the upper and lower measuring units.
In the electrolytic copper foil market, the electrolytic copper foil is classified into various specifications according to the nominal thickness, such as 6 μm copper foil, 8 μm copper foil, and copper foil areal density ρsAnd the change condition of the areal density is an important parameter for measuring the thickness deviation of the electrolytic copper foil with different specifications. The density of copper is 8.96g/cm3The areal density can be calculated as follows:
ρs＝ρ·d
in continuous production, for the overall measurement of the surface density state of the coiled copper foil, the surface density average value of the copper foil in the current measurement process can be used
And (3) characterization:
the current measurement can be used for the surface density change of the rolled copper foilAreal density rho of whole roll of copper foil under measurement processsExtremely poor R ofnOr standard deviation snAnd (5) characterizing. The calculation formulas are respectively as follows:
wherein:
n: a measurement count of a current measurement process;
Tn: the variance of the current measurement process.
However, the above-mentioned definitional expressions cannot be adopted in the present real-time control system because the above-mentioned expressions (1) and (2) are both equal to each measurement of the current measurement process
This means that each time the measurement data is added, the above equations (1) and (2) need to be recalculated, and the data required for calculation includes the data from the first measurement to the current nth measurementThere is measurement data. In the continuous measurement, as the measurement progresses, the amount of data increases, and the calculation load using the above equations (1) and (2) is unacceptable.
It is desirable that the device can use the result of the last calculation at each update of the measurement data to greatly reduce the amount of calculation, and therefore, the recursive formula of the above equations (1) and (2) needs to be derived and used:
according to the recurrence formulas of (4) and (5), the average value of the calculation results of the n-1 th measurement process can be obtained
Variance Tn-1Calculating the mean value of the n-th measurement process
Variance TnAnd further according to the variance TnCalculating the standard deviation Sn。
In the online control system, the data of the online thickness gauge is calculated according to the formulas (4) and (5), and then the mean value is obtained
And variance snThe current value and the change curve of continuous multiple measurements are displayed on a display screen of a system host, so that an operator can confirm the operation state of the foil forming machine at any time and monitor the surface density quality of the coiled copper foil. Meanwhile, the above calculation result is also used to confirm the production state of the system, and confirm the engineering capability of the system under normal operation, i.e. the capability of producing the electrolytic copper foil meeting the specification requirements, as described later.
According to the online control system, the surface density data of the online thickness gauge measured in the position of the copper foil in the width direction corresponding to each liquid separating pipeline is acquired, and after the data are processed, the electromagnetic flow valve arranged on the corresponding liquid separating pipeline is subjected to feedback control, so that the stability of the surface density data in production is ensured, and the online control of the surface density of the copper foil is realized. The present online control system provides a conventional PID control scheme based on single measurement data and a PID control scheme based on statistical information.
In the traditional PID control scheme based on single measurement data, the surface density of the same liquid separation pipeline is measured by a laser thickness gauge
Subscript j represents the ordinal number of the liquid separation pipeline, subscript i represents the ordinal number of the measurement times, the ordinal number is used as an input parameter of the PID controller after filtering treatment, the opening increment of the valve is output, and the control algorithm can be represented as the following formula.
Here, k-1, k are measurement times ordinal numbers, and j is a corresponding liquid separation pipeline ordinal number;
φkaccording to the output deviation
Calculated control increment, wherein Kp，Ki，KdThe PID regulating coefficients are calibrated in advance, and T is a time step;
Φk+1opening degree of electromagnetic flow valve corresponding to next time of command output, phikThe opening degree of the current corresponding electromagnetic flow valve;
in practice, for the production of electrolytic copper foil of 8 μm gauge, the copper foil gauge is limited to [70,74 ]]g/cm2When the internal control is performed, the control is performed according to [70.5,73.5 ]]g/cm2As control limits, control limit bits
In the PID control scheme based on the statistical information, the following control methods are simultaneously provided corresponding to the online control system:
firstly, determining the engineering capacity of a crude foil machine, specifically, determining the surface density mean value of the specified copper foil produced by the crude foil machine according to the previous production data or the trial run production data or the production data after the last adjustment
And standard deviation scpThen, on the premise that the confidence coefficient is 99.7%, the copper foil produced by the raw foil machine can be considered to be stabilized
Within the interval of (2), wherein the lower limit of the capacity
Upper limit of capacity
Interval(s)
I.e. engineering capacity of the foil forming machine.
In order to ensure that the produced copper foil meets the internal quality control requirement, the engineering capacity of the foil generation machine is required to be within the control limit range, namely
At the moment, the foil producing machine is stable within the control limit, the copper foils meeting the internal quality control requirement can be produced in batches, and PID feedback control is not involved; while
At this time, it is stated that there is a deviation between the control limit and the engineering capacity, and the foil producing machine produces a copper foil that does not meet the internal quality control requirement with a certain probability, and needs to intervene PID regulation control to return the engineering capacity of the green foil to the control limit.
Importantly, at the moment, in order to improve the efficiency of PID regulation control and enable the regulation process to quickly reach a stable state, the proportional regulation coefficient K in the PID regulation algorithm is adjustedpThe control system is adjusted properly according to the actual condition of the engineering capacity, namely the real-time statistical information of the application system modifies the set regulating coefficient, and the proportional regulating coefficient is set to be linearly changed according to the standard deviation of the actual engineering capacity, namely
Wherein a, b, K'pOne optional analysis procedure is to take s from a and b respectively according to prior analysis of the history data of the raw foil machinenWithin a value range formed by the minimum value and the maximum value of the history record, i.e.
The proportional regulating coefficient is enabled to deviate from the steady state according to the system within the system change range, namely snCharacterizing, adjusting a proportionality coefficient K'pIs achieved.
Fig. 3 shows control curves plotted according to the production process of a green foil machine under several embodiments and a conventional PID control embodiment based on single measurement data as follows. Wherein:
example 1 is, K'p＝-0.72，a＝0.0，b＝2.0，
Example 2 is, K'p＝-0.72，a＝0.5，b＝1.5，
Example 3 is, K'p＝-0.72，a＝1.0，b＝2.0。
In the implementation of the PID feedback control process, the system calculates continuous m groups of data after the control process is started, each group of I data, wherein the average value of the I data in the group is calculated when whether the m groups of data are continuous or not is not required
And standard deviation sin-plCalculating the mean value between groups
And standard deviation scr-pThe engineering capability after control can be estimated as
Wherein
The engineering capability is used as the engineering capability for controlling the post foil forming machine, and the judging process is continued to confirm whether the next round of control process is carried out. In order to make the sampled sample representative and represent the surface density distribution of the copper foil produced by a foil producing machine, l is required to be more than or equal to 5, and m is required to be more than or equal to 5. Specifically, in the control system, in order to obtain a control conclusion as soon as possible in consideration of sampling efficiency, l is 5, and m is 7.
The above description is only for the purpose of describing the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention are intended to fall within the protection scope defined by the claims of the present invention.
Claims (8)
1. An on-line control system for the surface density uniformity of electrolytic copper foil, which is integrated with an electrolytic copper foil generating machine, is characterized by comprising:
each electromagnetic flow valve of the plurality of electromagnetic flow valves is respectively connected with a plurality of liquid separation pipelines which are arranged on an anode tank of the foil forming machine side by side along the width direction of a cathode roller of the foil forming machine;
the online thickness gauge is arranged on a forward route of the copper foil between a cathode roller and a material receiving roller of the foil forming machine, and the online thickness gauge is arranged across the width direction of the copper foil;
the controller is electrically connected with the plurality of electromagnetic flow valves respectively and is used for controlling the flow of each electromagnetic flow valve in the plurality of electromagnetic flow valves respectively;
and the system host is in signal connection with the online thickness gauge and the controller and can send a control instruction to the controller according to the surface density data fed back by the online thickness gauge.
2. The electrolytic copper foil surface density uniformity online control system of claim 1, wherein the plurality of electromagnetic flow valves are all PVC electromagnetic ball valves, and the online thickness gauge uses a laser thickness gauge.
3. The control method of the electrolytic copper foil surface density uniformity online control system based on any one of claims 1-2 is characterized by comprising the following steps of:
determining the control limit by selecting the copper foil specification range [ rho ]dn,ρup]A subset of which is used as a control limit
Wherein
In order to control the lower limit of the pressure,
is the upper control limit;
and an areal density acquisition step, namely controlling the online thickness gauge to perform one measurement along the width direction of the copper foil, acquiring the thickness d of the copper foil at the position of the liquid separation pipeline corresponding to the width direction, and calculating the current value of the areal density at the position of the liquid separation pipeline:
wherein n represents the nth measurement process of the production process, and rho is the density of copper;
a data characteristic calculation step, namely sequentially calculating the average value of the surface density measured values of the positions of the liquid distribution pipeline corresponding to the width direction until the surface density measured values of the positions of the liquid distribution pipeline in the current measurement process
And standard deviation sn；
Calculating engineering capacity of the foil generator on the liquid separating pipeline according to the surface density data acquired by the online film thickness meter, and dividing the engineering capacity into sections
Is shown in which
In order to be the lower limit of the capacity,
is the upper capacity limit;
PID control step, namely, the engineering capacity of the crude foil machine on the liquid separation pipeline
And control limits for copper foil production
In comparison, if
Without intervention of PID control, if
The PID control is intervened.
4. The method for controlling the electrolytic copper foil surface density uniformity on-line control system according to claim 3, wherein the data characteristic calculating step comprises:
for the liquid separation pipeline, calculating the average value of the measured values of the surface density from the measured value to the measured value in the current measuring process as follows:
calculating the standard deviation s of the measured value of the areal density of the current measuring processj·nComprises the following steps:
wherein, TnTo calculate the intermediate quantity, i.e. the variance of the areal density measurement of the current measurement process, the subscript (n-1) indicates the result of the calculation of the corresponding data characteristic in the previous measurement step.
5. The method for controlling the electrolytic copper foil surface density uniformity online control system according to claim 3, wherein the engineering capacity calculating step comprises:
an initial calculation step of determining the average surface density of the copper foil with the specified thickness produced by the foil producing machine according to the previous production data or the trial run production data or the production data after the last adjustment
And standard deviation scpThen the lower limit of the capability
Upper limit of the capacity
Interval(s)
I.e. engineering capacity of the green foil machine.
6. The method for controlling the system for controlling the areal density uniformity of an electrolytic copper foil of claim 3, wherein the engineering capability calculating step further comprises:
in-process capacity calculation step, calculating continuous m groups of data after PID control process is started by a calculation system, wherein l is more than or equal to 5, m is more than or equal to 5, and according to the average value of l data in each group
And standard deviation sin-plCalculating the interclass mean
And standard deviation scr-pThen the lower limit of the capability
Upper limit of the capacity
7. The method for controlling the electrolytic copper foil surface density uniformity on-line control system according to claim 3, wherein in the PID control step, the proportional control coefficient K of PID adjustment is adoptedpAccording to the standard deviation s of the production process of the liquid separation pipelinenDetermine the relationship of
Wherein a, b, K'pIs a preset coefficient.
8. The method for controlling the system for controlling the areal density uniformity of an electrolytic copper foil according to claim 7, wherein the coefficients a and b satisfy
And is
Wherein the content of the first and second substances,
is s isnThe maximum value of the history is recorded,
is s isnThe historical minimum value.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115185191A (en) * | 2022-09-13 | 2022-10-14 | 钛科优控(江苏)工业科技有限公司 | Self-learning control system and method for thickness of copper foil of foil forming machine |
| CN115216813A (en) * | 2022-07-15 | 2022-10-21 | 福建紫金铜箔科技有限公司 | Method for regulating and controlling transverse thickness of copper foil |
| CN115261933A (en) * | 2022-07-15 | 2022-11-01 | 福建紫金铜箔科技有限公司 | Intelligent control method for copper foil thickness |
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| JPH04221093A (en) * | 1990-12-19 | 1992-08-11 | Nikko Guurudo Foil Kk | Method and device for producing electrolytic copper foil |
| CN109652826A (en) * | 2019-02-22 | 2019-04-19 | 圣达电气有限公司 | The electrolytic copper foil the thickness uniformity control method of cathode roll |
| CN112903009A (en) * | 2021-01-15 | 2021-06-04 | 广东嘉元科技股份有限公司 | Online monitoring system of crude foil machine |
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| JPH04221093A (en) * | 1990-12-19 | 1992-08-11 | Nikko Guurudo Foil Kk | Method and device for producing electrolytic copper foil |
| CN109652826A (en) * | 2019-02-22 | 2019-04-19 | 圣达电气有限公司 | The electrolytic copper foil the thickness uniformity control method of cathode roll |
| CN112903009A (en) * | 2021-01-15 | 2021-06-04 | 广东嘉元科技股份有限公司 | Online monitoring system of crude foil machine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115216813A (en) * | 2022-07-15 | 2022-10-21 | 福建紫金铜箔科技有限公司 | Method for regulating and controlling transverse thickness of copper foil |
| CN115261933A (en) * | 2022-07-15 | 2022-11-01 | 福建紫金铜箔科技有限公司 | Intelligent control method for copper foil thickness |
| CN115216813B (en) * | 2022-07-15 | 2024-04-16 | 福建紫金铜箔科技有限公司 | Method for regulating and controlling transverse thickness of copper foil |
| CN115185191A (en) * | 2022-09-13 | 2022-10-14 | 钛科优控(江苏)工业科技有限公司 | Self-learning control system and method for thickness of copper foil of foil forming machine |
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| CN114481232B (en) | 2024-03-15 |
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