CN104801542A - High-precision rolled copper foil for high-energy environment-friendly battery - Google Patents
High-precision rolled copper foil for high-energy environment-friendly battery Download PDFInfo
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- CN104801542A CN104801542A CN201510225666.1A CN201510225666A CN104801542A CN 104801542 A CN104801542 A CN 104801542A CN 201510225666 A CN201510225666 A CN 201510225666A CN 104801542 A CN104801542 A CN 104801542A
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- copper foil
- rolled copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a high-precision rolled copper foil for a high-energy environment-friendly battery. The high-precision rolled copper foil is characterized in that the nominal thickness of the copper coil is 0.01mm-0.003mm and the width is 600-700mm; a high-purity soft copper strip is taken as a raw material and is subjected to multi-pass cold rolling in a multi-roll mill; the rolling reduction of each rolling pass is 10%-40% of the thickness of the copper coil before the rolling; the rolling speed is 120m/min-200m/min; the uncoiling and coiling diameters are 400mm-1500mm; after the rolling is finished, deionized water is used for cleaning at high temperature and high pressure, and then the annealing is performed in an air cushion type annealing furnace. The high-precision rolled copper foil can be used for replacing an imported product or electrolytic copper foil; the production cost is lowered; the application of the high-precision rolled copper foil in the high-energy environment-friendly battery is promoted; the usage of the electrolytic copper foil is reduced; the environmental pollution and energy consumption caused by the production of the electrolytic copper foil are reduced; the service life of the products is prolonged; the competitiveness of the products is promoted; besides, the deionized water is used for cleaning at high temperature and high pressure, so that the environmental pollution caused by the production of the high-precision rolled copper foil is reduced.
Description
Technical field
The present invention relates to a kind of Copper Foil, especially relate to a kind of high-precision rolled copper foil for high energy green battery.
Background technology
Rolled copper foil is formed through repeatedly finish rolling, annealing and surface treatment by high-purity thin copper belt, rolled copper foil has low surperficial oxygen species, various different substrate materials can be attached to, as metal, insulating materials etc., have the wider temperature scope of application, therefore, the application of rolled copper foil in electronic information technology industry is more and more extensive.Due to the foundation of rolled copper foil factory, invest huge, and to arrange etc. in the technology controlling and process of producing and production environment and be the high project of difficulty, at present, domesticly rolled copper foil can be produced and to possess the enterprise of advanced technical merit also little, be in the stage of starting in other words, the demand of the electronic information technology industry of domestic rise cannot be met at all, although rolled copper foil at home in recent years, under the demand of international market is in very vigorous situation always, the supply of rolled copper foil controls primarily of the U.S. and Japanese firm, and production technology holds in close confidence, therefore, the main dependence on import of domestic rolled copper foil product, price is very expensive, domestic do not have new rolled copper foil manufacturer can occupy the larger market share yet.At present, the production of domestic rolled copper foil adopts outmoded old technique mostly, as used the rolling at a slow speed of little four rollers, vacuum drying oven annealing etc., product thickness is substantially at more than 0.05mm, width is mostly at below 200mm, and production efficiency is low, and product size deviation is large, the uniformity of mechanical property and less stable, resting period is short, can not meet the demand of domestic and international market.Be that the high energy green battery of representative is compared with other heavy-duty batteries with lithium ion battery, it is high that it has specific energy, memory-less effect, have extended cycle life, pollution-free, the advantages such as volume is little and lightweight, become the first choice of portable electronic products power supply, rolled copper foil because of its surface roughness low, after heat treatment, ductility waits well the advantage adapting to cell making process, progressively expand in the application of high-performance lithium battery industry (particularly at coiled battery), but lithium ion battery manufacturer domestic at present mainly uses the rolled copper foil of electrolytic copper foil or import, production cost is high, in the production process of simultaneously electrolytic copper foil, energy consumption is large, and cause environmental pollution, so, independent research rolled copper foil production technology, manufacturing copper foil production equipment, the production of domestic rolled copper foil, substitute import, very necessary.
Summary of the invention
The applicant is for above-mentioned problem, be studied improvement, a kind of high-precision rolled copper foil for high energy green battery is provided, the use of import substitutes or electrolytic copper foil, reduces production cost, promotes the application of high-precision rolled copper foil in high energy green battery, reduce the use of electrolytic copper foil, reduce electrolytic copper foil and produce the environmental pollution and energy consumption that cause, extend life of product, the competitiveness of improving product.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
For a high-precision rolled copper foil for high energy green battery, the nominal thickness of Copper Foil is between 0.01mm ~ 0.003mm, and width is between 600 ~ 700 mm; Adopt that purity is greater than 99.6%, the soft state copper strips of thickness 0.1 ~ 0.05mm is as raw material, cold rolling through some passages in multi-roll mill, when copper thickness is greater than 0.03mm, the rolling unit tension force of each rolling pass is adopted to determine rolling tensile force with 15% ~ 25% of the material yield strength of this passage, when thickness is less than or equal to 0.03mm, the rolling unit tension force of each rolling pass is adopted to determine rolling tensile force with 20% ~ 55% of the material yield strength of this passage; The drafts of each rolling pass is 10% ~ 40% of copper thickness before rolling; Mill speed is 120m/min ~ 200m/min, and uncoiling and take-up diameter are between 400mm ~ 1500mm; After rolling completes, the cleaning of employing deionized water HTHP, then anneals in air-cushion type annealing furnace.
Further:
The temperature of described deionized water HTHP cleaning is at 75 ~ 85 degrees Celsius, and pressure is between 0.15 ~ 0.3MPa.
In the production process of high-precision rolled copper foil, because band is very thin, intensity is very low, any small disturbance factor all can bring the risk of broken belt, thus tension force controls particularly important, if tension force occurs that fluctuation is easy to occur coiled material wrinkle, the situations such as fracture, solve the accurate control of tension force with mechanical constant tension control system.In the process that some passages in multi-roll mill are cold rolling, when copper thickness is greater than 0.03mm, milling train exit thickness can be controlled according to roller gap and rolling tensile force in the operation of rolling, the most important thing is based on roller gap control in the operation of rolling, adopt the rolling unit tension force of each rolling pass to determine rolling tensile force with 15% ~ 25% of the material yield strength of this passage; When thickness is less than or equal to 0.03mm, because now close to zero roll gap state, independent increase draught pressure is nonsensical, rolling tensile force and mill speed affect larger on rolling thickness, so adopt the rolling unit tension force of each rolling pass to determine rolling tensile force with 20% ~ 55% of the material yield strength of this passage, along with the thinning rolling unit tension force of material thickness progressively increases progressively.In addition, rolled copper foil is in process of production because its intensity is very low, the length of Unit Weight is very long, also larger to the disturbance of tension system when coil diameter is larger time, require higher to the accuracy of manufacture of equipment, under existing device fabrication precision and existing traditional tension control mode, be difficult to realize major diameter continuous length produce, existing product coil diameter is greatly mainly with below 700mm.Pin rolled copper foil feature, adopt unconventional equipment and mechanical constant tension control system, can realize the production of continuous length, coil diameter can reach 1500mm.
Existing copper foil surface process means are the method for Chemical cleaning and mechanical lapping, and when process thickness is lower than below 0.015mm Copper Foil, mechanical lapping is easy to damage copper foil surface, and cause surface conformance to be deteriorated, serious meeting causes broken belt.Chemical surface treatment adopts caustic dip greasy dirt mostly, clean water alkali lye remains, in the process of caustic dip Copper Foil, alkali lye can cause chemical contamination to Copper Foil, destruction copper foil surface is active, clear water is difficult to clean up residual for alkali lye completely, and residual alkali lye can bring impact to next procedure, adopts high pressure-temperature deionized water directly to clean Copper Foil, avoid the secondary pollution of cleaning process to Copper Foil, and greatly reduce environmental pollution.
Existing copper foil annealing technique is cover annealing and continuous annealing two kinds, when cover annealing is for less than 0.015 millimeter Copper Foil, even if take loose winding to reduce the means of web tension in advance, or be very easy to the situation occurring glutinous band, and coil diameter substantially all can only at below 500mm.When Copper Foil runs in continuous annealing furnace, Copper Foil in the case of a high temperature tensile strength sharply declines, to such an extent as to tensile strength can not meet and self run forward continuously, very easily broken belt.Adopt air-cushion type annealing furnace, lead to protective gas in Copper Foil heating region, allow Copper Foil be suspended on gas and run forward, ensure that band not easy fracture.
Technique effect of the present invention is:
A kind of high-precision rolled copper foil for high energy green battery disclosed by the invention, be made up through repeatedly finish rolling, surface clean and annealing of high-purity thin copper belt, the use of import substitutes or electrolytic copper foil, reduce production cost, promote the application of high-precision rolled copper foil in high energy green battery, reduce the use of electrolytic copper foil, reduce electrolytic copper foil and produce the environmental pollution and energy consumption that cause, extend life of product, the competitiveness of improving product; Adopt the cleaning of deionized water HTHP in addition, reduce high-precision rolled copper foil and produce pollution on the environment.
Detailed description of the invention
Be described in further detail below in conjunction with the specific embodiment of the present invention.
Embodiment 1,
The Copper Foil that preparation nominal thickness is 0.01mm, width is 700 mm, adopt purity to be greater than 99.6%, the soft state copper strips of thickness 0.1mm is as raw material, and cold rolling through 6 passages in mill, (yield strength is about 230N/mm in first rolling
2): rolling unit tension force 35N/mm
2, drafts 40%, mill speed 150m/min; (yield strength is about 280N/mm in second rolling
2): rolling unit tension force 50N/mm
2, drafts 30%, mill speed 150m/min; (yield strength is about 320N/mm in 3rd road rolling
2): rolling unit tension force 80N/mm
2, drafts 30%, mill speed 170m/min; (yield strength is about 350N/mm in 4th road rolling
2): rolling unit tension force 100N/mm
2, drafts 30%, mill speed 180m/min; (yield strength is about 350N/mm in 5th road rolling
2): rolling unit tension force 110N/mm
2, drafts 30%, mill speed 180m/min; (yield strength is about 350N/mm in 6th road rolling
2): rolling unit tension force 120N/mm
2, drafts 30%, mill speed 180m/min.
The uncoiling of each passage and take-up diameter are between 500 mm ~ 1500mm; Employing deionized water HTHP cleaning after rolling completes, temperature is at 85 degrees Celsius, and pressure is 0.3MPa; Then anneal in air-cushion type annealing furnace, complete preparation.
Embodiment 2,
The Copper Foil that preparation nominal thickness is 0.008mm, width is 650 mm, adopt purity to be greater than 99.6%, the soft state copper strips of thickness 0.1mm is as raw material, and cold rolling through 7 passages in mill, (yield strength is about 230N/mm in first rolling
2): rolling unit tension force 35N/mm
2, drafts 40%, mill speed 150m/min; (yield strength is about 280N/mm in second rolling
2): rolling unit tension force 50N/mm
2, drafts 30%, mill speed 150m/min; (yield strength is about 320N/mm in 3rd road rolling
2): rolling unit tension force 80N/mm
2, drafts 30%, mill speed 170m/min; (yield strength is about 350N/mm in 4th road rolling
2): rolling unit tension force 100N/mm
2, drafts 30%, mill speed 180m/min; (yield strength is about 350N/mm in 5th road rolling
2): rolling unit tension force 110N/mm
2, drafts 30%, mill speed 180m/min; (yield strength is about 350N/mm in 6th road rolling
2): rolling unit tension force 120N/mm
2, drafts 30%, mill speed 180m/min; (yield strength is about 350N/mm in 7th road rolling
2): rolling unit tension force 120N/mm
2, drafts 20%, mill speed 180m/min.
The uncoiling of each passage and take-up diameter are between 500 mm ~ 1500mm; Employing deionized water HTHP cleaning after rolling completes, temperature is at 80 degrees Celsius, and pressure is 0.25MPa; Then anneal in air-cushion type annealing furnace, complete preparation.
Embodiment 3,
The Copper Foil that preparation nominal thickness is 0.003mm, width is 600 mm, adopt purity be greater than 99.6%, the soft state copper strips of thickness 0.05mm as raw material, cold rolling through 8 passages in mill, (yield strength is about 230N/mm in first rolling
2): rolling unit tension force 35N/mm
2, drafts 40%, mill speed 120m/min; (yield strength is about 280N/mm in second rolling
2): rolling unit tension force 80N/mm
2, drafts 30%, mill speed 150m/min; (yield strength is about 320N/mm in 3rd road rolling
2): rolling unit tension force 110N/mm
2, drafts 30%, mill speed 150m/min; (yield strength is about 350N/mm in 4th road rolling
2): rolling unit tension force 120N/mm
2, drafts 30%, mill speed 150m/min; (yield strength is about 350N/mm in 5th road rolling
2): rolling unit tension force 130N/mm
2, drafts 30%, mill speed 150m/min; (yield strength is about 350N/mm in 6th road rolling
2): rolling unit tension force 130N/mm
2, drafts 30%, mill speed 150m/min; (yield strength is about 350N/mm in 7th road rolling
2): rolling unit tension force 180N/mm
2, drafts 30%, mill speed 150m/min; (yield strength is about 350N/mm in 8th road rolling
2): rolling unit tension force 180N/mm
2, drafts 15%, mill speed 150m/min.
The uncoiling of each passage and take-up diameter are between 500 mm ~ 1500mm; Employing deionized water HTHP cleaning after rolling completes, temperature is at 75 degrees Celsius, and pressure is 0.15MPa, then anneals in air-cushion type annealing furnace, completes preparation.
Claims (2)
1. for a high-precision rolled copper foil for high energy green battery, it is characterized in that: the nominal thickness of Copper Foil is between 0.01mm ~ 0.003mm, and width is between 600 ~ 700 mm; Adopt that purity is greater than 99.6%, the soft state copper strips of thickness 0.1 ~ 0.05mm is as raw material, cold rolling through some passages in multi-roll mill, when copper thickness is greater than 0.03mm, the rolling unit tension force of each rolling pass is adopted to determine rolling tensile force with 15% ~ 25% of the material yield strength of this passage, when thickness is less than or equal to 0.03mm, the rolling unit tension force of each rolling pass is adopted to determine rolling tensile force with 20% ~ 55% of the material yield strength of this passage; The drafts of each rolling pass is 10% ~ 40% of copper thickness before rolling; Mill speed is 120m/min ~ 200m/min, and uncoiling and take-up diameter are between 400mm ~ 1500mm; After rolling completes, the cleaning of employing deionized water HTHP, then anneals in air-cushion type annealing furnace.
2. according to the high-precision rolled copper foil for high energy green battery according to claim 1, it is characterized in that: the temperature of described deionized water HTHP cleaning is at 75 ~ 85 degrees Celsius, and pressure is between 0.15 ~ 0.3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510225666.1A CN104801542A (en) | 2015-05-06 | 2015-05-06 | High-precision rolled copper foil for high-energy environment-friendly battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510225666.1A CN104801542A (en) | 2015-05-06 | 2015-05-06 | High-precision rolled copper foil for high-energy environment-friendly battery |
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| CN104801542A true CN104801542A (en) | 2015-07-29 |
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| CN201510225666.1A Pending CN104801542A (en) | 2015-05-06 | 2015-05-06 | High-precision rolled copper foil for high-energy environment-friendly battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057354A (en) * | 2015-09-16 | 2015-11-18 | 富威科技（吴江）有限公司 | Production technology for rolled copper foil for lithium battery |
| CN105543746A (en) * | 2016-01-29 | 2016-05-04 | 灵宝金源朝辉铜业有限公司 | Rolled copper foil softening annealing technology |
| CN113275379A (en) * | 2021-06-02 | 2021-08-20 | 清远市进田企业有限公司 | Preparation process of high-ductility electrolytic copper |
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Cited By (3)
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|---|---|---|---|---|
| CN105057354A (en) * | 2015-09-16 | 2015-11-18 | 富威科技（吴江）有限公司 | Production technology for rolled copper foil for lithium battery |
| CN105543746A (en) * | 2016-01-29 | 2016-05-04 | 灵宝金源朝辉铜业有限公司 | Rolled copper foil softening annealing technology |
| CN113275379A (en) * | 2021-06-02 | 2021-08-20 | 清远市进田企业有限公司 | Preparation process of high-ductility electrolytic copper |
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Application publication date: 20150729 |