CN112626570A - Electrolytic preparation equipment for metal foil and electrolytic preparation process for metal foil - Google Patents
Electrolytic preparation equipment for metal foil and electrolytic preparation process for metal foil Download PDFInfo
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- CN112626570A CN112626570A CN202011422458.8A CN202011422458A CN112626570A CN 112626570 A CN112626570 A CN 112626570A CN 202011422458 A CN202011422458 A CN 202011422458A CN 112626570 A CN112626570 A CN 112626570A
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- cathode
- metal foil
- conductive roller
- electrolytic
- cathode conductive
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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
- C25D1/00—Electroforming
- C25D1/08—Perforated or foraminous objects, e.g. sieves
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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
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/10—Electrodes, e.g. composition, counter electrode
- C25D17/12—Shape or form
Abstract
The invention discloses an electrolytic preparation device of metal foil, comprising: the electrolytic cell is used for containing electrolyte and is internally provided with an anode plate; the bottom of the cathode conductive roller is embedded into the electrolytic bath and is connected with a driving mechanism for driving the electrolytic bath to rotate; and at least part of the cathode crawler belt is sleeved on the peripheral wall of the bottom of the cathode conductive roller and is electrically contacted with the cathode conductive roller, an insulating area is distributed on the outer surface, and a gap is reserved between the outer surface and the anode plate. According to the invention, the cathode caterpillar tracks are in electrical contact with the cathode conductive rollers, so that metal is deposited on the outer surfaces of the cathode caterpillar tracks to form metal foils, and the insulating areas on the outer surfaces of the cathode caterpillar tracks are not subjected to metal deposition due to the insulating effect, so that holes are formed in the formed metal foils in the insulating areas, and therefore, the perforated metal foils are formed at one time, the processing efficiency is high, the cathode caterpillar tracks with different specifications can be conveniently replaced according to the metal foils with different specifications, and the metal foils with different specifications can be conveniently processed.
Description
Technical Field
The invention relates to electrolytic equipment and a process, in particular to electrolytic preparation equipment of metal foil and an electrolytic preparation process of the metal foil.
Background
In the battery industry, it is often necessary to manufacture high precision metal foil parts. Especially for lithium batteries, continuously improving the capacity density and energy density of the lithium batteries will become a permanent development direction in the future, if the capacity density is improved by copper foil, the volume and specific gravity of the copper foil in the batteries are reduced, the copper foil is usually made to be extremely thin and reaches 4-6 um at present, some micropores are generally required to be processed by the copper foil, and the precision and quality requirements of production equipment of the extremely thin copper foil with holes are higher and higher for the application of mass production of the extremely thin copper foil with holes. Conventional equipment and processes have difficulty machining holes in such thin copper foils.
The microporous copper foil available in the market at present is basically prepared by firstly depositing a light-emitting surface copper foil on the smooth surface of a cathode roller in an electrolytic mode, and then processing the light-emitting surface copper foil in a secondary mechanical processing mode, or an electrochemical corrosion mode, or a photoetching mode and the like to prepare the required microporous copper foil; in this way, the secondary processing cost is very high, and the parameters of the foil itself are deteriorated.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides electrolytic preparation equipment for metal foil, which can process and form the copper foil with holes at one time.
An apparatus for electrolytic production of a metal foil according to an embodiment of a first aspect of the present invention includes: the electrolytic cell is used for containing electrolyte and is internally provided with an anode plate; the bottom of the cathode conductive roller is embedded into the electrolytic bath and is connected with a driving mechanism for driving the electrolytic bath to rotate; and at least part of the cathode crawler belt is sleeved on the peripheral wall of the bottom of the cathode conductive roller and is electrically contacted with the cathode conductive roller, an insulating area is distributed on the outer surface, and a gap is reserved between the outer surface and the anode plate.
The electrolytic preparation equipment for the metal foil provided by the embodiment of the invention at least has the following technical effects: the cathode caterpillar band is in electrical contact with the cathode conductive roller, so that metal is deposited on the outer surface of the cathode caterpillar band to form metal foil, and an insulation area on the outer surface of the cathode caterpillar band does not generate metal deposition due to the insulation effect, the formed metal foil forms a hole in the insulation area, and the metal foil with the hole is formed at one time.
According to some embodiments of the invention, the outer surface of the cathode track is provided with an inwardly recessed concave hole corresponding to the insulation area, and the concave hole is internally provided with an insulation structure attached to the inner wall of the concave hole.
According to some embodiments of the invention, the insulating structure is formed by spray filling an insulating material in the recess hole.
According to some embodiments of the invention, the insulating material is a polymer insulating resin or a titanium nitride ceramic.
According to some embodiments of the invention, the central axis of the cathode conductive roll is horizontally disposed.
According to some embodiments of the invention, the cathode conductive roller further comprises a synchronization roller, the central axis of the synchronization roller is parallel to the central axis of the cathode conductive roller, and the synchronization roller is positioned above the cathode conductive roller; the lower end of the cathode crawler belt is sleeved on the cathode conductive roller, and the upper end of the cathode crawler belt is sleeved on the synchronous roller.
According to some embodiments of the invention, the upper surface of the anode plate is a circular arc surface coaxial with the cathode conductive roller.
According to some embodiments of the invention, at least the peripheral edges of the two end surfaces in the axial direction of the cathode conductive roller are provided with a first sealing insulating layer, and the end surfaces of the two sides of the cathode crawler are provided with a second sealing insulating layer.
According to some embodiments of the invention, the first and second sealing insulating layers are made of a silicon gel or a ceramic material.
According to the electrolytic preparation process of the metal foil, the electrolytic preparation equipment of the metal foil is adopted for production, the metal foil is formed by deposition on the outer surface of the cathode crawler belt, and no metal is deposited in the insulating area, so that holes are formed in the metal foil in the insulating area, and the metal foil with the holes is obtained.
The electrolytic preparation process of the metal foil provided by the embodiment of the invention at least has the following technical effects: the metal foil with the holes is formed at one time, the processing efficiency is high, the cathode tracks with different specifications can be conveniently replaced according to copper foils with different specifications, and compared with replacement of cathode rollers with different specifications, the cost is greatly reduced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic side view of an embodiment of the present invention;
FIG. 2 is a front view of the cathode track;
FIG. 3 is a cross-sectional view of the cathode track;
fig. 4 is a sectional view taken at a-a of fig. 1.
Reference numerals:
an electrolytic cell 100, a metal foil 101, an anode plate 110;
a cathode conductive roller 200, a first sealing insulating layer 201, a synchronizing roller 210;
the cathode caterpillar 300, the second sealing insulating layer 301, the insulating area 310, the concave hole 320, the insulating structure 330 and the white space area 340;
the rolls 400 are pulled.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 4, an apparatus for electrolytically manufacturing a metal foil according to an embodiment of the present invention includes an electrolytic bath 100, a cathode conductive roller 200, and a cathode crawler 300.
The electrolytic tank 100 is used for containing electrolyte, the upper part of the electrolytic tank 100 is provided with an opening, an anode plate 110 is arranged in the electrolytic tank 100, and the anode plate 110 is used for being connected with an anode when being electrified. The cathode conductive roller 200 is used to be connected to a cathode when energized, and the bottom of the cathode conductive roller 200 is embedded in the electrolytic bath 100 to be in contact with the electrolyte in the electrolytic bath 100, so that the electrolyte can be electrolyzed to deposit metal when energized. The cathode conductive roller 200 is connected to a driving mechanism for driving the cathode conductive roller to rotate, and the driving mechanism drives the cathode conductive roller 200 to rotate so as to drive the formed metal foil to be discharged and then to be wound subsequently. The cathode caterpillar 300 is at least partially sleeved on and electrically contacted with the outer peripheral wall of the bottom of the cathode conductive roller 200, that is, the cathode caterpillar 300 covers the outer peripheral wall of the bottom of the cathode conductive roller 200, so that the electrolyte deposits metal on the outer surface of the cathode caterpillar 300 to form metal foil. The outer surface of the cathode caterpillar 300 is provided with an insulating area 310, and metal is not deposited on the insulating area 310, namely, the formed metal foil forms holes at the insulating area 310, and the manufacturing of the perforated metal foil is completed. The outer surface of the cathode track 300 has a gap with the anode plate 110 for the electrolyte to be in sufficient contact with the cathode track 300 for electrolysis.
According to the electrolytic preparation equipment for the metal foil provided by the embodiment of the invention, the cathode caterpillar 300 is in electrical contact with the cathode conductive roller 200, so that metal is deposited on the outer surface of the cathode caterpillar 300 to form the metal foil 101, and the insulating area 310 on the outer surface of the cathode caterpillar does not generate metal deposition due to the insulating effect, so that holes are formed in the insulating area by the formed metal foil 101, and therefore, the metal foil with holes is formed at one time, the processing efficiency is high, the cathode caterpillar with different specifications can be conveniently replaced according to the metal foils with different specifications, and the metal foils with different specifications can be conveniently processed. Compared with the method for manufacturing the cathode conductive roller by using the gravure micropore insulation points or the bump insulation points on the surface of the cathode conductive roller, when metal foils with different hole sizes, shapes and arrangement modes need to be processed, the cathode conductive rollers with different specifications need to be produced, and the processing difficulty and the cost of the cathode rollers are very high. It is obvious that the cost for manufacturing the cathode caterpillar tracks with different specifications is lower than that for manufacturing the cathode conductive roller with different specifications, and the replacement of the cathode caterpillar tracks 300 is more convenient than the replacement of the cathode conductive roller 200.
It is contemplated that the arrangement and shape of the insulating regions 310 may be adjusted according to the specifications of the copper foil to be produced. As shown in fig. 2, the insulating regions 310 are arranged on both sides of the outer surface of the cathode track 300, leaving a blank region 340 in the middle. The size of the margin area 340 can be adjusted or even removed according to the specification of the copper foil to be produced. In addition, the cathode caterpillar 300 may be a metal foil tape having a conductive structure, such as a titanium foil tape or a stainless foil tape.
In some embodiments of the present invention, the outer surface of the cathode track 300 is provided with an inwardly recessed recess 320 corresponding to the insulation region 310, an insulation structure 330 attached to the inner wall of the recess 320 is provided in the recess 320, and the insulation structure 330 prevents metal from being deposited in the insulation region 310 to form a hole. The concave hole 320 may be blind hole shaped or through hole shaped, and the hole may be round, square or other geometric shapes.
In some embodiments of the invention, the electrolyte is a copper-dissolving solution to form a copper foil.
In some embodiments of the present invention, the insulating structure 330 is formed by spraying and filling an insulating material into the recess 320, so that the insulating structure 330 has a better sealing property with the inner wall of the recess 320, and the quality of the metal foil is prevented from being affected by metal deposition at the gap.
In some embodiments of the present invention, the insulating material is a polymer insulating resin or titanium nitride ceramic, which has good insulating property and corrosion resistance.
In some embodiments of the present invention, the central axis of cathode conductive roll 200 is disposed horizontally, so that the metal foil is deposited uniformly and can be fed uniformly for horizontal unrolling. As shown in fig. 1, a drawing roll 400 is provided on the side of the cathode conductive roll 200 from which the metal foil 101 is fed, for drawing the metal foil 101 horizontally to facilitate winding.
In some embodiments of the present invention, the cathode conductive roller further comprises a synchronization roller 210, a central axis of the synchronization roller 210 is parallel to a central axis of the cathode conductive roller 200, and the synchronization roller 210 is located above the cathode conductive roller 200; the cathode caterpillar 300 is sleeved on the cathode conductive roller 200 at the lower end thereof and the synchronous roller 210 at the upper end thereof. The cathode caterpillar 300 only needs to be in contact with the peripheral wall area of the cathode conductive roller 200 in contact with the electrolyte, so that the cathode caterpillar 300 is sleeved on the peripheral wall of the bottom of the cathode conductive roller 200, and the outer surface of the cathode caterpillar 300 can form a metal foil. The cathode caterpillar 300 is spread by the sync roller 210 to be closely contacted with the cathode conductive roller 200, and a certain sealing effect is achieved, so that the electrolyte does not enter between the cathode caterpillar 300 and the cathode conductive roller 200.
Referring to fig. 1, in the embodiment of the present invention, the upper surface of the anode plate 110 is a circular arc surface coaxial with the cathode conductive roller 200, so that the distance between the anode plate 110 and the cathode conductive roller 200 is uniform, that is, the cathode caterpillar 300 and the cathode conductive roller 200 have a uniform gap, so that the metal deposition is uniform, and the uniform thickness of the metal foil is ensured. The electrolytic tank 100 is also in a semicircular arc shape, the central axis of the electrolytic tank is coaxial with the cathode conductive roller 200, and the anode plate 110 is coaxially arranged at the bottom of the electrolytic tank 100.
Referring to fig. 4, in some embodiments of the present invention, at least the outer peripheral edges of both end surfaces of the cathode conductive roller 200 in the axial direction are provided with a first sealing insulating layer 201, and the end surfaces of both sides of the cathode track 300 are provided with a second sealing insulating layer 301. Since only the bottom portion of the cathode conductive roller 200 is embedded in the electrolyte, only the outer periphery of the end face comes into contact with the electrolyte as the cathode conductive roller 200 rotates. The first seal insulating layer 201 may be provided only on the end face outer peripheral edge. Of course, in order to facilitate the installation of the first sealing insulating layer 201, one layer of the first sealing insulating layer 201 may be provided on both end surfaces in the axial direction of the cathode conductive roller 200. The first and second sealing insulating layers 201 and 301 can prevent metal from being deposited at locations where metal deposition is not required.
In the embodiment of the present invention, the first sealing insulating layer 201 and the second sealing insulating layer 301 are made of silica gel or ceramic material, so as to better perform the functions of insulation and sealing. The installation can be carried out by spraying or pasting.
The invention also provides an electrolytic preparation process of the metal foil, which is characterized in that the electrolytic preparation equipment of the metal foil is utilized to manufacture the metal foil, the conductive area on the outer surface of the cathode crawler 300 is deposited to form the metal foil, and the insulating area 310 is not deposited with metal, so that the metal foil forms holes in the insulating area 310, and the metal foil with holes is obtained. The process is simple and practical, and the cathode crawler 300 is convenient to replace to produce metal foils with different specifications.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An electrolytic production apparatus for a metal foil, characterized by comprising:
the electrolytic cell (100) is used for containing electrolyte and is internally provided with an anode plate (110);
a cathode conductive roller (200) with the bottom embedded in the electrolytic bath (100) and connected with a driving mechanism for driving the electrolytic bath to rotate;
the cathode caterpillar band (300) is at least partially sleeved on the peripheral wall of the bottom of the cathode conductive roller (200) and electrically contacted with the peripheral wall, an insulation area (310) is distributed on the outer surface of the cathode caterpillar band (300), and a gap is formed between the outer surface of the cathode caterpillar band (300) and the anode plate (110).
2. The electrolytic production apparatus for metal foil according to claim 1, characterized in that: the outer surface of the cathode crawler (300) is provided with an inwards concave hole (320) corresponding to the insulation area (310), and an insulation structure (330) attached to the inner wall of the concave hole (320) is arranged in the concave hole.
3. The electrolytic production apparatus for metal foil according to claim 2, characterized in that: the insulation structure (330) is formed by spraying and filling an insulation material in the concave hole (320).
4. The electrolytic production apparatus for metal foil according to claim 3, characterized in that: the insulating material is high molecular insulating resin or titanium nitride ceramic.
5. The electrolytic production apparatus for metal foil according to claim 1, characterized in that: the central axis of the cathode conductive roller (200) is horizontally arranged.
6. The electrolytic production apparatus for metal foil according to claim 5, wherein: the device also comprises a synchronous roller (210), the central axis of the synchronous roller (210) is parallel to the central axis of the cathode conductive roller (200), and the synchronous roller (210) is positioned above the cathode conductive roller (200); the lower end of the cathode crawler (300) is sleeved on the cathode conductive roller (200), and the upper end of the cathode crawler is sleeved on the synchronous roller (210).
7. The electrolytic production apparatus for metal foil according to claim 1 or 5, characterized in that: the upper surface of the anode plate (110) is an arc surface coaxial with the cathode conductive roller (200).
8. The electrolytic production apparatus for metal foil according to claim 1, characterized in that: at least the peripheral edges of two axial end faces of the cathode conductive roller (200) are provided with first sealing insulating layers (201), and the end faces of two sides of the cathode crawler belt (300) are provided with second sealing insulating layers (301).
9. The electrolytic production apparatus for metal foil according to claim 8, wherein: the first sealing insulating layer (201) and the second sealing insulating layer (301) are made of silica gel or ceramic materials.
10. A process for the electrolytic production of metal foil, characterized in that it is produced by means of an apparatus for the electrolytic production of metal foil according to any one of claims 1 to 9, said cathode track (300) being provided with a conductive area on its outer surface with a metal foil deposited thereon, said insulating area (310) being provided with no metal deposited thereon so that the metal foil forms holes in said insulating area (310), resulting in a perforated metal foil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011422458.8A CN112626570A (en) | 2020-12-08 | 2020-12-08 | Electrolytic preparation equipment for metal foil and electrolytic preparation process for metal foil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011422458.8A CN112626570A (en) | 2020-12-08 | 2020-12-08 | Electrolytic preparation equipment for metal foil and electrolytic preparation process for metal foil |
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| CN112626570A true CN112626570A (en) | 2021-04-09 |
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| CN202011422458.8A Pending CN112626570A (en) | 2020-12-08 | 2020-12-08 | Electrolytic preparation equipment for metal foil and electrolytic preparation process for metal foil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445084A (en) * | 2021-07-30 | 2021-09-28 | 福建清景铜箔有限公司 | Novel electrolytic copper foil raw foil device |
| CN114695842A (en) * | 2022-04-12 | 2022-07-01 | 广东嘉元科技股份有限公司 | Copper foil manufacturing device for microporous copper foil |
| CN117144430A (en) * | 2023-10-30 | 2023-12-01 | 江苏时代新能源科技有限公司 | Electrolytic roll, electrolytic device and battery production system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445084A (en) * | 2021-07-30 | 2021-09-28 | 福建清景铜箔有限公司 | Novel electrolytic copper foil raw foil device |
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| CN114695842A (en) * | 2022-04-12 | 2022-07-01 | 广东嘉元科技股份有限公司 | Copper foil manufacturing device for microporous copper foil |
| CN114695842B (en) * | 2022-04-12 | 2023-04-07 | 广东嘉元科技股份有限公司 | Copper foil manufacturing device for microporous copper foil |
| CN117144430A (en) * | 2023-10-30 | 2023-12-01 | 江苏时代新能源科技有限公司 | Electrolytic roll, electrolytic device and battery production system |
| CN117144430B (en) * | 2023-10-30 | 2024-03-22 | 江苏时代新能源科技有限公司 | Electrolytic roll, electrolytic device and battery production system |
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