CN117328110A - Electrolytic copper foil producing device and method - Google Patents
Electrolytic copper foil producing device and method Download PDFInfo
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- CN117328110A CN117328110A CN202311365882.7A CN202311365882A CN117328110A CN 117328110 A CN117328110 A CN 117328110A CN 202311365882 A CN202311365882 A CN 202311365882A CN 117328110 A CN117328110 A CN 117328110A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 133
- 239000011889 copper foil Substances 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003792 electrolyte Substances 0.000 claims abstract description 73
- 238000005192 partition Methods 0.000 claims abstract description 37
- 239000011888 foil Substances 0.000 claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 239000008151 electrolyte solution Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 238000010923 batch production Methods 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention provides an electrolytic copper foil producing device and a foil producing method, wherein the device comprises the following steps: an electrolytic tank filled with electrolyte; the cathode roller is horizontally arranged at the top of the electrolytic tank, one half of the roller wall of the cathode roller is immersed in the electrolyte, and the end part of the cathode roller is externally connected with a circuit; the plurality of partition plates are positioned in the electrolytic tank and are arranged in parallel, the partition plates are perpendicular to the cathode roller, and the electrolytic tank is partitioned into a plurality of small electrolytic tanks along the length direction of the cathode roller; the flow control device is arranged in the small electrolytic tank and used for adjusting the flow of electrolyte flowing to the cathode roller in the small electrolytic tank; and the controller is connected with the flow control device and controls the flow of electrolyte flowing through the flow control device so as to obtain the copper foil with the target thickness. The invention can realize different widths and thicknesses of the copper foil generated in different areas of the electrolytic tank, can improve the production efficiency and reduce the production cost.
Description
Technical Field
The invention relates to the technical field of electrolytic copper foil, in particular to an electrolytic copper foil producing device and a foil producing method.
Background
The electrolytic copper foil is not only a main carrier of the cathode of the lithium ion battery, but also a key material of a printed circuit board which plays roles of supporting and interconnecting components in electronic products, and the production technology and quality of the electrolytic copper foil directly influence the performance and the production cost of the lithium ion battery and the electronic products. However, the copper foil for electronic products and the copper foil for lithium ion batteries have different thickness requirements, and since lithium ion batteries are developed in the directions of high energy density and low weight, the thickness of the copper foil for lithium ion batteries is required to be thinner than that of the copper foil for electronic products. At present, the cathode roller of the same foil producing machine can only produce copper foils with the same thickness, the thickness of the produced copper foil is changed, the formula, concentration and electrolysis parameters of electrolyte are required to be replaced or adjusted, the time is long, a large amount of waste foils are produced in the replacement process, and the cost and energy waste are caused.
There are few studies or reports on electrolytic copper foil methods and processing equipment of variable thickness and breadth, which are involved at home and abroad.
In the Chinese patent application publication No. CN114990644A, the auxiliary width of the copper foil is regulated and controlled by coating the insulating shielding material on the edge of the cathode roller, but the insulating material coated on the cathode roller is required to be heated and solidified, and the ineffective insulating material is removed by adopting a grinding wheel polishing mode, so that the grain structure and the roughness of the surface of the cathode roller are affected to a certain extent, and the surface performance of the copper foil is further reduced.
The Chinese patent application publication No. CN113445084A discloses a novel electrolytic copper foil producing device which can conveniently and flexibly adjust the technological parameters such as concentration, temperature, flow, additives, polar distance and the like of an electrolytic solution in stages in the process of producing copper foil. The patent also has the following problems: copper foil coil materials with a plurality of thicknesses cannot be formed at the same time, so that batch production is not facilitated; the method is unfavorable for generating ultrathin copper foil and stripping the copper foil quickly and without damage; a plurality of direct current power supplies are needed, so that the energy consumption is high; the concentration and the supply amount of the electrolyte in the electrolytic area cannot be flexibly and rapidly changed, and the production efficiency is low.
The Chinese patent application publication No. CN115216813A discloses a method for regulating and controlling the transverse thickness of copper foil, which comprises the steps of arranging anode plates positioned at the foil outlet end of an anode unit into a plurality of short anode plates along the width direction, respectively connecting each short anode plate with a corresponding independent direct current power supply, regulating input current by the independent direct current power supplies, transversely detecting the thickness condition of the copper foil along the width direction by a detection unit, controlling the flow of copper sulfate electrolyte of the independent direct current power supply and a secondary liquid inlet in a linkage manner, and flexibly controlling the current of the short anode plates so as to regulate the uniformity of the thickness. The patent also has the following problems: short gap breakdown is easily caused, so that circuit faults occur; the energy consumption is high; adjacent electrolyte watercourses can mutually interfere, so that the concentration of the electrolyte is unstable, and the thickness of the copper foil in the width direction is unstable, which is not beneficial to mass production.
Therefore, development of an electrolytic copper foil method and processing equipment with variable thickness and width is urgently needed, and copper foils with different thicknesses can be simultaneously produced according to requirements, so that time consumed for switching products and the amount of waste foil are reduced, production efficiency is improved, and production cost is reduced.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide an electrolytic copper foil producing device and a foil producing method.
According to an aspect of the present invention, there is provided an electrolytic copper foil producing device comprising:
an electrolytic tank filled with electrolyte;
the cathode roller is horizontally arranged at the top of the electrolytic tank, one half of the roller wall of the cathode roller is immersed in electrolyte, and the end part of the cathode roller is externally connected with a circuit;
the plurality of partition plates are positioned in the electrolytic tank and are arranged in parallel, the partition plates are perpendicular to the cathode roller, and the electrolytic tank is partitioned into a plurality of small electrolytic tanks along the length direction of the cathode roller;
the flow control device is arranged in the small electrolytic tank and used for adjusting the flow rate of electrolyte flowing to the cathode roller in the small electrolytic tank;
and the controller is connected with the flow control device and controls the flow of electrolyte flowing through the flow control device so as to regulate and control the electrolysis speed of the electrolytic green foil in each small electrolytic tank and obtain the copper foil with the target thickness.
Optionally, the number of the partition plates is determined according to the thickness and the width of the target copper foil.
Alternatively, the interval between the two partition plates is determined according to the thickness and the width of the target copper foil.
Optionally, a bayonet is provided at an edge of the partition plate, a shape of the bayonet is matched with a cross-sectional shape of the cathode roller, and the cathode roller is placed in the bayonet.
Optionally, the bayonet is a U-shaped bayonet.
Optionally, a horizontal anode plate is arranged at the bottom of the electrolytic tank, the anode plate is shared by all small electrolytic tanks, and the end part of the anode plate is externally connected with a circuit; the anode plate area in each small electrolytic tank is provided with two flow control devices, the bottom in each small electrolytic tank is provided with an electrolyte inlet and an electrolyte outlet, and the two flow control devices are respectively positioned at the electrolyte inlet and the electrolyte outlet.
Optionally, the flow control device adjusts the flow of the electrolyte according to the thickness of the target copper foil.
According to another aspect of the present invention, there is provided an electrolytic copper foil producing method, implemented by the electrolytic copper foil producing apparatus described above, comprising:
according to the thickness and the width of the target copper foil, a plurality of partition plates are arranged in the electrolytic cell, and the electrolytic cell is divided into a plurality of small electrolytic cells;
according to the thickness of the target copper foil, regulating the flow rate of electrolyte to each small electrolytic cell by using a flow control device in each small electrolytic cell;
starting a foil producing machine to produce the electrolytic foil to obtain the copper foil with the required thickness and width.
Optionally, after the copper foil with the required thickness and width is obtained, the method further comprises: and (3) separating and cutting the copper foils with different thicknesses, and simultaneously obtaining the copper foils with different thicknesses.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. according to the invention, the raw foil electrolytic tank is divided into a plurality of small electrolytic tanks by arranging the plurality of partition plates, and the electrolytic solution supply quantity flowing to the cathode roller is regulated and controlled by the plurality of flow control devices, so that the electrolytic speed regulation and control of each small electrolytic tank are realized, and finally, the different widths and thicknesses of the copper foils generated in different areas of the electrolytic tank can be realized, therefore, the invention can realize the rapid customized processing of the electrolytic copper foils in the widths and thicknesses according to different requirements.
2. According to the invention, the copper foil coil stock with different thickness can be produced simultaneously according to the requirement by changing the flow of the flow control device in each small electrolytic tank without changing the formula of the electrolyte, the time consumed by switching products and the amount of waste foil are reduced, the installation and the use are simple and convenient, the production efficiency can be effectively improved, the production cost is reduced, and the batch production is facilitated.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a schematic view showing a structure of an electrolytic copper foil producing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a second structure of an electrolytic copper foil producing apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing a third embodiment of an electrolytic copper foil producing apparatus according to the present invention;
in the figure: 1 is an electrolytic tank, 2 is a partition plate, 3 is an anode plate, 4 is an electrolyte inlet, 5 is an electrolyte outlet, 6 is a cathode roller, 7 is a controller, 8 is a bayonet, and 9 is the end of the cathode roller.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Referring to fig. 1 to 3, an electrolytic copper foil producing device according to an embodiment of the present invention includes an electrolytic cell 1, a cathode roller 6, a plurality of partition plates 2, a flow rate control device, and a controller 7, wherein: electrolyte is filled in the electrolytic tank 1; the cathode roller 6 is horizontally arranged at the top of the electrolytic tank 1, one half of the roller wall of the cathode roller 6 is immersed in the electrolyte, and the end part of the cathode roller 6 (namely the end part 9 of the cathode roller in fig. 2) is externally connected with an electric circuit; the columnar cathode roller 6 is semi-immersed in electrolyte, and as the cathode roller 6 rotates, newly generated copper foil is easy to peel off from the rotating cathode roller 6 in a nondestructive manner, and the residence time of the copper foil on the cathode roller 6 is shorter because the cathode roller 6 is in a semi-immersing manner, so that ultrathin copper foil can be generated; the plurality of partition plates 2 are arranged in the electrolytic tank 1 in parallel, the partition plates 2 are perpendicular to the cathode roller 6, the normal direction of the partition plates 2 is parallel to the roller shaft of the cathode roller 6, and the plurality of partition plates 2 partition the electrolytic tank 1 into a plurality of small electrolytic tanks along the length direction of the cathode roller 6; the flow control device is arranged in the small electrolytic tank and is used for adjusting the flow of electrolyte flowing to the cathode roller 6 in the small electrolytic tank; the controller 7 is connected with the flow control device, and the controller 7 controls the flow of the electrolyte flowing through the flow control device so as to regulate and control the electrolysis speed of the electrolytic green foil in each small electrolytic cell, and the copper foil with the target thickness is obtained.
In the above embodiment, the copper foil tape is wound around the cylindrical cathode roll 6, and the width is the width of the tape, and the number of the partition plates 2 is determined according to the thickness and the width of the target copper foil. The interval between the two partition plates 2 is determined according to the thickness and the width of the target copper foil.
In some embodiments, the edge of the partition plate 2 is provided with a bayonet 8, the shape of the bayonet 8 matches the cross-sectional shape of the cathode roller 6, and the cathode roller 6 is placed in the bayonet 8. Preferably, the cathode roller 6 is columnar, and the bayonet 8 is a U-shaped bayonet. Other shapes of the bayonet 6 are also possible depending on the shape of the cathode roller 6, which is not particularly limited in the embodiment of the present invention.
An anode plate 3 (i.e. a bottom plate) is horizontally arranged at the bottom of the electrolytic tank 1, the anode plate 3 is shared by all small electrolytic tanks, the bottom plate can be a flat plate, a bent plate or a plate with other shapes, and the end part of the anode plate 3 is externally connected with a circuit. In some embodiments, two flow control devices are installed in the anode plate 3 area in each small electrolytic tank, an electrolyte inlet 4 and an electrolyte outlet 5 are arranged at the bottom in each small electrolytic tank, and the two flow control devices are respectively positioned at the electrolyte inlet 4 and the electrolyte outlet 5, namely respectively coincide with the electrolyte inlet 4 and the electrolyte outlet 5, specifically, the flow control devices (inlet flow control devices) at the position where the electrolyte inlet 4 is installed in the forward direction, and the electrolyte passes through the inlet flow control devices on the horizontal anode plate 3 from the bottom of the electrolytic tank and flows to the cathode roller 6; another flow control device (outlet flow control device) installed at the electrolyte outlet 5 is installed in the opposite direction, and the electrolyte flows from the cathode roll 6 toward the bottom of the electrolytic tank. The flow rate of the flow rate control device passing through the electrolyte inlet 4 and the electrolyte outlet 5 is controlled by the controller 7 to regulate and control the supply amount of fresh electrolyte flowing to the cathode roller 6, thereby regulating and controlling the electrolytic speed of the electrolytic green foil and obtaining the copper foil with target thickness. In addition, the flow control device in the embodiment of the invention is positioned on the anode plate 3 at the bottom of the small electrolytic tank and distributed on two sides of the cathode roller 6, and the electrolyte flows in the electrolytic area, so that the flow of the electrolyte can be flexibly and quickly regulated, and the supply quantity and concentration of the electrolyte near the cathode roller can be quickly changed.
The flow control device in the prior art (CN 113445084A) is arranged on the side wall of the electrolytic tank and near the anode, the flow direction from the inlet to the outlet is vertical to the trend of the copper foil coil, the obtained material is the copper foil coil with thickness variation in the length direction of the coil, the copper foils with various thicknesses are divided into sections, and the copper foils cannot form complete coils with different thicknesses at the same time; the flow control device in the embodiment of the invention is arranged on the anode plate 3, the flow direction from the inlet to the outlet is consistent with the trend of the copper foil coil, the obtained material is the copper foil coil with thickness variation in the width direction of the coil, and the copper foil coil with different thickness is cut, so that the complete coil can be obtained, namely, the copper foil coil with different thickness and multiple widths can be formed at the same time in the embodiment of the invention, and the batch production is facilitated.
In some embodiments, the number of the flow control devices is consistent with that of the small electrolytic cells, and the flow control devices are any structure or device capable of controlling the flow and opening and closing in the prior art and are used for controlling the flow of electrolyte flowing to the cathode roller 6 in the small electrolytic cells. The flow control device adjusts the flow of the electrolyte according to the thickness of the target copper foil.
In some embodiments, the controller 7 adopts a PLC controller, and changes the flow rate of the electrolyte flowing through the flow control device through a program, thereby changing the fresh electrolyte supply quantity inside each small electrolytic cell and regulating the electrolytic speed of the electrolytic green foil in different areas of the electrolytic cell 1. Of course, in other embodiments, other types of controllers may be employed, as long as the same functions described above are achieved.
When the device of the invention works specifically, electrolyte flows from the bottom of each small electrolytic tank separated by the partition plate 2 to the top of the small electrolytic tank, passes through the flow control devices, and meanwhile, the controller 7 controls the inflow of the electrolyte at the inlet of each flow control device in a program manner, so that the supply amount of fresh electrolyte in each small electrolytic tank can be different, and the electrolytic speeds of electrolytic green foils in different areas of the electrolytic tank 1 are regulated and controlled, for example, under the premise that the rotating speed of the cathode roller 6 is unchanged, if the flow rate of the electrolyte in the small electrolytic tank is larger, the more fresh electrolyte flows to the cathode roller 6 at the same moment, the more copper foil is generated, and the copper foil with larger thickness is piled up on the cathode roller 6, so that the thickness or the breadth of the copper foil at different positions of the cathode roller 6 can be changed finally.
The thickness and the width of the copper foil in the width direction of the material belt are changed according to the requirements of customers by combining the partition plate 2 with the flow control device. For example: when the flow rates of the small electrolytic cells in half the number of the partition plates 2 are uniformly adjusted to a certain flow rate a, and the flow rates of the small electrolytic cells in the other ones of the partition plates 2 are uniformly adjusted to a flow rate a 2 times, the copper foil thus obtained is: in the width direction, the copper foil coil stock with one side being 2 times the thickness of the other side can be cut to obtain two copper foils with the width being 1/2 of that of the original coil stock, wherein one of the two copper foil coil stocks is B, and the other is 2 times B. Also for example: when the total number of small electrolytic cell flow control devices inside the partition plate 2 is one third of the total number is zero, the obtained copper foil is a roll of copper foil having a width of 2/3 of the height of the cathode roll 6. In the embodiment of the invention, even if the flow rates (which can be also understood as the flow rates of the electrolyte) of the flow control devices in the adjacent small electrolytic cells are greatly different, the condition that the electrolytes in the adjacent two small electrolytic cells interfere with each other is very small and can be basically ignored due to the arrangement of the partition plate 2, so that the condition that the thicknesses of the copper foils in different areas of the cathode roller 6 in the width direction are unstable can be effectively improved, and the batch production is facilitated. In addition, the embodiment of the invention does not change the thickness of the copper foil in the width by adjusting the anode current, the anode and the cathode are integrated, only one group of power supplies is needed, the anode has no pressure difference, the risk of breakdown of the short gaps of the adjacent anodes is avoided, and the safety production is facilitated.
Another embodiment of the present invention provides a method for producing an electrolytic copper foil, which is implemented by using the electrolytic copper foil producing device, and with continued reference to fig. 1 to 3, the method includes:
s1, arranging a plurality of partition plates 2 in an electrolytic cell 1 according to the thickness and the width of a target copper foil, performing partition treatment on the electrolytic cell 1 of a foil producing machine, and dividing the electrolytic cell 1 into a plurality of small electrolytic cells along the length direction of a cathode roller 6;
s2, according to the thickness of the target copper foil, regulating the flow of electrolyte to each small electrolytic cell by using a flow control device in each small electrolytic cell; specifically, the flow rate of the electrolyte to each small electrolytic tank is controlled by a PLC (programmable logic controller) so that the supply amount of fresh electrolyte flowing to the cathode roller 6 from each small electrolytic tank is different, thereby changing the electrolytic speed of each small electrolytic tank and achieving the purpose of changing the thickness and the width of the electrolytic copper foil;
s3, starting a foil producing machine to electrolyze foil, specifically, starting a foil producing machine power supply, electrifying a cathode roller and an anode, starting electrolytic reaction, simultaneously, starting rotation of the cathode roller, stripping the generated copper foil from the cathode roller, and rolling into a copper foil coil material through other procedures to obtain the copper foil with required thickness and breadth.
In some embodiments, after obtaining the copper foil of the desired thickness and width, further comprising: and (3) separating and cutting the copper foils with different thicknesses, and simultaneously obtaining the copper foils with different thicknesses.
According to the embodiment, the electrolytic tank 1 of the foil producing machine is firstly partitioned according to the thickness and the width of the target copper foil, then the flow rate of fresh electrolyte which is led to each small electrolytic tank is regulated by a flow control device according to the width and the thickness requirement of the copper foil, and then the foil producing machine is started to produce electrolytic foil, so that the preparation of the electrolytic copper foil with variable thickness and width is realized, and the problems that the electrolyte replacement is complex, the consumed time is long, a large amount of waste copper foils are produced in the process and the like in the prior art are solved. If the flow rate of the small electrolytic cell at the edge position is regulated to zero, the wall of the cathode roll 6 located in the small electrolytic cell does not generate copper foil, and the effect of reducing the width of the copper foil can be achieved.
The technical solutions of the present application will be further described with more specific examples and comparative examples, and it should be noted that the following examples are not intended to limit the present invention.
Referring to fig. 1 to 3, which are schematic structural views of an electrolytic copper foil producing apparatus for producing an electrolytic copper foil of variable thickness and width, comprising: the electrolytic bath 1, the partition plate 2, the flow control device, the cathode roller 6 and the controller 7, wherein the controller 7 adopts a PLC controller.
The electrolytic foil producing method with the device and the variable thickness and width comprises the following steps:
s1: the electrolytic tank 1 of the foil producing machine is added with two partition plates 2, so that the electrolytic tank 1 is divided into three small electrolytic tanks along the length direction of a cathode roller 6, and a flow control device is added on an anode plate 3 in each small electrolytic tank.
S2: according to the width and breadth requirements of the copper foil, the controller 7 controls the flow rate of the electrolyte to one small electrolytic tank on the near side wall to be different from that of the other two small electrolytic tanks, so that the supply amount of the fresh electrolyte flowing to the cathode roller 6 from the small electrolytic tank on the near side wall is different from that of the other small electrolytic tanks, and the purpose of changing the electrolytic speed of each small electrolytic tank is achieved.
S3: the foil producing machine is started to produce the electrolytic foil to obtain the copper foil with variable thickness, the thickness of the partition board 2 is small enough, the flow control devices of the adjacent 2 small electrolytic cells are set to have the same flow, and the flow of the remaining small electrolytic cell is 1/2 of the flow of the other two small electrolytic cells, so that two sections of copper foils with different thicknesses, namely, the electrolytic copper foil with 12 mu m thickness on one side and 6 mu m thickness on the other side, can be obtained, and the copper foils with different thicknesses are separated to realize the simultaneous provision of the copper foils with different target thicknesses.
The electrolytic cell without a partition plate is used as a comparative example, and the current density is controlled to be 1000A/m under the action of a direct current power supply 2 In the electrolyte containing the additive, the copper ion concentration was 120g/L, the solution temperature was controlled at 60 ℃, and the electrolysis conditions were identical to those of the electrolytic foil producing method of the above-described examples with variable thickness and width, and the energization operation was maintained to obtain an electrolytic copper foil with a thickness of 6 μm and a width of 2. Mu.m.
The embodiment of the invention prepares the electrolytic copper foil with the thickness of one side of 12 mu m (the width of the electrolytic copper foil is 1 m) and the thickness of one side of 6 mu m (the width of the electrolytic copper foil is 1 m), and after slitting, the electrolytic copper foil with the thickness of 12 mu m and the width of 1m and the electrolytic copper foil with the thickness of 12 mu m and the width of 1m are finally obtained. Compared with the comparative example, the embodiment of the invention does not need to switch the formula and the concentration of the electrolyte midway, saves the consumed time by 22 percent, reduces the amount of the waste copper foil by 30 percent, and can simultaneously meet different thickness requirements.
In the embodiment of the invention, the foil producing electrolytic tank 1 is divided into a plurality of small electrolytic tanks by arranging the plurality of partition plates 2, and the electrolytic solution supply quantity flowing to the cathode roller 6 is regulated and controlled by the flow control device, so that the electrolytic speed regulation and control of each small electrolytic tank are realized, and finally, the width and thickness of the copper foil generated in different areas of the electrolytic tank 1 are different, therefore, the rapid customized processing of the electrolytic copper foil in the width and thickness can be realized according to different requirements. According to the embodiment of the invention, the copper foil coil stock with different thicknesses can be produced simultaneously according to the requirements without changing the electrolyte formula, the time consumed for switching products and the amount of waste foil can be reduced, the installation and the use are simple and convenient, the production efficiency can be effectively improved, the production cost is reduced, and the batch production is facilitated.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention. The above-described preferred features may be used in any combination without collision.
Claims (9)
1. An electrolytic copper foil producing device, characterized by comprising:
an electrolytic tank filled with electrolyte;
the cathode roller is horizontally arranged at the top of the electrolytic tank, one half of the roller wall of the cathode roller is immersed in electrolyte, and the end part of the cathode roller is externally connected with a circuit;
the plurality of partition plates are positioned in the electrolytic tank and are arranged in parallel, the partition plates are perpendicular to the cathode roller, and the electrolytic tank is partitioned into a plurality of small electrolytic tanks along the length direction of the cathode roller;
the flow control device is arranged in the small electrolytic tank and used for adjusting the flow rate of electrolyte flowing to the cathode roller in the small electrolytic tank;
and the controller is connected with the flow control device and controls the flow of electrolyte flowing through the flow control device so as to obtain the copper foil with the target thickness.
2. The electrolytic copper foil producing apparatus according to claim 1, wherein the number of the partition plates is determined according to the thickness and the width of the target copper foil.
3. The electrolytic copper foil producing apparatus according to claim 1, wherein the interval between the two barrier plates is determined according to the thickness and the width of the target copper foil.
4. The electrolytic copper foil producing device according to claim 1, wherein the edge of the partition plate is provided with a bayonet, the shape of the bayonet is matched with the cross-sectional shape of the cathode roller, and the cathode roller is placed in the bayonet.
5. The electrolytic copper foil producing device according to claim 4, wherein the bayonet is a U-shaped bayonet.
6. The electrolytic copper foil producing device according to claim 1, wherein a horizontal anode plate is arranged at the bottom of the electrolytic tank, the anode plate is shared by all small electrolytic tanks, and the end part of the anode plate is externally connected with a circuit; the anode plate area in each small electrolytic tank is provided with two flow control devices, the bottom in each small electrolytic tank is provided with an electrolyte inlet and an electrolyte outlet, and the two flow control devices are respectively positioned at the electrolyte inlet and the electrolyte outlet.
7. The electrolytic copper foil producing apparatus according to claim 1, wherein the flow rate control means adjusts the flow rate of the electrolytic solution in accordance with the thickness of the target copper foil.
8. An electrolytic copper foil producing method, realized by the electrolytic copper foil producing apparatus according to any one of claims 1 to 7, characterized by comprising:
according to the thickness and the width of the target copper foil, a plurality of partition plates are arranged in the electrolytic cell, and the electrolytic cell is divided into a plurality of small electrolytic cells;
according to the thickness of the target copper foil, regulating the flow rate of electrolyte to each small electrolytic cell by using a flow control device in each small electrolytic cell;
starting a foil producing machine to produce the electrolytic foil to obtain the copper foil with the required thickness and width.
9. The method for producing an electrolytic copper foil according to claim 8, further comprising, after said obtaining a copper foil of a desired thickness and width: and (3) separating and cutting the copper foils with different thicknesses, and simultaneously obtaining the copper foils with different thicknesses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311365882.7A CN117328110A (en) | 2023-10-20 | 2023-10-20 | Electrolytic copper foil producing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311365882.7A CN117328110A (en) | 2023-10-20 | 2023-10-20 | Electrolytic copper foil producing device and method |
Publications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117926352A (en) * | 2024-03-19 | 2024-04-26 | 江苏兴虹科技有限公司 | Raw foil slitting integrated equipment for copper foil processing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117926352A (en) * | 2024-03-19 | 2024-04-26 | 江苏兴虹科技有限公司 | Raw foil slitting integrated equipment for copper foil processing |
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