CN114525432A - High-strength and high-extension aluminum foil for new energy battery and manufacturing method thereof - Google Patents
High-strength and high-extension aluminum foil for new energy battery and manufacturing method thereof Download PDFInfo
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- CN114525432A CN114525432A CN202210016931.5A CN202210016931A CN114525432A CN 114525432 A CN114525432 A CN 114525432A CN 202210016931 A CN202210016931 A CN 202210016931A CN 114525432 A CN114525432 A CN 114525432A
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 60
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000011888 foil Substances 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims abstract description 71
- 238000005520 cutting process Methods 0.000 claims abstract description 24
- 238000005097 cold rolling Methods 0.000 claims abstract description 19
- 238000005266 casting Methods 0.000 claims abstract description 16
- 238000003723 Smelting Methods 0.000 claims abstract description 15
- 238000000137 annealing Methods 0.000 claims abstract description 15
- 238000009966 trimming Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 238000010008 shearing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 238000005461 lubrication Methods 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 238000007872 degassing Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- 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
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/003—Aluminium alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/119—Refining the metal by filtering
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
- H01M4/662—Alloys
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a high-strength and high-elongation aluminum foil for a new energy battery and a manufacturing method thereof. The composition and mass percentage are as follows: less than or equal to 0.10 percent of Si, 0.30-0.50 percent of Fe, 0.05-0.10 percent of Cu, less than or equal to 0.01 percent of Mn, less than or equal to 0.01 percent of Mg, less than or equal to 0.03 percent of Zn, less than or equal to 0.05 percent of Ti, and the balance of Al. The process flow comprises the steps of smelting, casting and rolling, cold rolling and intermediate annealing, secondary cold rolling and trimming, rough rolling, finish rolling, rough cutting, finish cutting, inspection, packaging and the like, wherein the smelting temperature is in the range of 735-755 ℃, and the molten metal is smelted and poured into a standing furnace at 735-755 ℃ for standing and heat preservation after being refined; then casting and rolling are carried out, and the steel enters a front box through degassing and filter box treatment; casting and rolling into a cast-rolling aluminum coil with the thickness of 6.5 +/-0.3 mm, and performing intermediate annealing on the cast-rolling aluminum coil until the thickness of the cast-rolling aluminum coil is 2.0-4.0 mm; then cold rolling to 0.4-0.6 mm for trimming; then carrying out rough rolling, coil combining and finish rolling; then rough cutting and fine cutting are carried out to obtain the finished product. The product of the invention has the characteristics of high strength, high elongation, high dyne value, and good plate type and surface end surface quality, and meets the requirements of new energy battery aluminum foils.
Description
Technical Field
The invention relates to a high-strength and high-elongation aluminum foil for a new energy battery and a manufacturing method thereof, and relates to the technical field of non-ferrous metal smelting, casting and rolling and manufacturing.
Background
Currently, under the support of a national orderly new energy policy and under the thrust of a policy of 'carbon peak reaching and carbon neutralization', the new energy battery industry enters a fast lane with high-speed development. The battery aluminum foil is used for a new energy battery anode current collector and can be divided into a power battery aluminum foil, a consumer battery aluminum foil and an energy storage battery aluminum foil. The aluminum foil used as the positive current collector of the new energy battery has the following advantages: firstly, the density of aluminum is lower than that of 1/3 copper, and the energy density of the battery can be improved by using an aluminum foil current collector; secondly, compared with copper, the price of aluminum is lower; thirdly, a layer of compact passivation film is formed on the surface of the aluminum foil current collector in the process of charging/discharging the battery, so that the corrosion resistance of the aluminum foil is improved; and fourthly, active substances such as nano conductive graphite, carbon coated particles and the like can be coated on the surface of the aluminum foil to change the surface form of the aluminum foil and increase the contact area between the aluminum foil and the positive active substance, thereby improving the conductivity.
Disclosure of Invention
The invention provides a high-strength and high-elongation aluminum foil for a new energy battery and a manufacturing method thereof, which can meet the requirements of the aluminum foil for the new energy battery on indexes such as foreign matters, wettability, plate shape, mechanical properties, thickness, trimming quality, surface quality, alloy and the like. The invention provides a high-strength and high-elongation aluminum foil for a new energy battery and a manufacturing method thereof, and the aluminum foil is characterized in that: the composite material comprises the following components in percentage by mass: less than or equal to 0.10 percent of Si, 0.30-0.50 percent of Fe, 0.05-0.10 percent of Cu0.05 percent of Cu0, less than or equal to 0.01 percent of Mn, less than or equal to 0.01 percent of Mg, less than or equal to 0.03 percent of Zn, less than or equal to 0.05 percent of Ti, and the balance of Al.
The invention also provides a rolling control method under the alloy component system based on the technical scheme of the alloy components, which comprises the following steps:
(1) smelting: the raw materials are fully and uniformly stirred during smelting, the smelting temperature is 735-755 ℃, the converter reversing temperature is 735-755 ℃, and the Fe/Si is required to be not less than 3;
(2) casting and rolling: the temperature of a front box for cast-rolling production is 690-700 ℃, and the thickness of a cast-rolling aluminum coil finished product is 6.5 +/-0.3 mm;
(3) cold rolling and intermediate annealing: rough rolling the cast and rolled finished product coil to 2.0-4.0 mm for intermediate annealing;
(4) secondary cold rolling and trimming: after intermediate annealing, rolling to 0.4-0.6 mm for trimming, and continuously rolling to the thickness of 0.2-0.3 mm after longitudinally shearing the edges;
(5) rough rolling: carrying out secondary cold rolling and trimming, and then carrying out rough rolling to 0.02-0.04 mm;
(6) rolling: rolling after rough rolling;
(7) finish rolling: after the rolling, performing finish rolling until the thickness of a finished product is 0.01-0.02 mm;
(6) rough cutting: cutting the finished thick material roll to a finished width of + 10-20 mm small roll;
(7) fine cutting: and rewinding the roughly cut small rolls and finely cutting the small rolls to obtain small rolls with the width of +/-0.5 mm of the finished product.
According to the technical scheme, the tensile strength of the aluminum foil product for the high-strength and high-elongation new energy battery is larger than or equal to 200MPa, the elongation is larger than or equal to 2%, the dyne value is larger than or equal to 30, the end face of the finished product is neat, the phenomena of obvious burrs, raised edges and wavy edges are avoided, the surface has no defects of adhesive roller marks, pockmarks, convex dents, bulging and the like, a dark surface has no obvious bright spots, the bottoming length is smaller than or equal to 1m, no wrinkling and soft bars are generated, and the requirements of the aluminum foil for the new energy battery on indexes such as dissimilar substances, wettability, plate shape, mechanical property, thickness, trimming quality, surface quality and alloy are met.
Detailed Description
In order to better describe the present invention, the following embodiments are described in detail as examples, and the following examples are only used to more clearly illustrate the technical solutions of the present invention, but not to limit the scope of the present invention.
Example 1
The invention relates to a high-strength and high-elongation aluminum foil for a new energy battery and a manufacturing method thereof, which comprises the following components in percentage by mass: 0.08% of Si, 0.31% of Fe0.06% of Cu0.06%, 0.006% of Mn0.03%, 0.01% of Zn0.03% of Ti0.03% of Mg, and the balance of Al, wherein Fe/Si is 3.875%.
According to the component control, the aluminum foil material for the new energy battery is further obtained, and the specific preparation steps are as follows:
(1) smelting: when in smelting, the raw materials are fully and uniformly stirred, the smelting temperature is 745 ℃, the raw materials are refined twice and 20 min/time by using a special refining agent at the temperature of 745 ℃, and the raw materials are turned over after the component adjustment meets the control requirement of the invention, and the turning-over temperature is 755 ℃;
(2) casting and rolling: during casting and rolling production, the temperature of a degassing box is controlled at 730 ℃, the air flow is controlled at 30L/min, the speed of a rotor is controlled at 550rpm, the temperature of a filter box is controlled at 720 ℃, a 40+ 60-mesh filter plate is used for double-stage filtration, the temperature of a front box is 700 ℃, the casting and rolling area is controlled at 65mm, the opening degree of a casting nozzle is controlled at 10.5mm, the casting and rolling linear speed is controlled at 880mm/min, and the specification of a cast and rolled aluminum coil finished product is 6.6mm in thickness and 1360mm in width;
(3) cold rolling and intermediate annealing: firstly, cold rolling (pass arrangement: 6.6-4.1-2.1) the cast-rolled blank to 2.1mm, carrying out intermediate annealing at 530 ℃ for 5h, and starting mass flow in the rolling process;
(4) secondary cold rolling and trimming: after intermediate annealing, carrying out secondary cold rolling (pass arrangement: 2.1-1.0-0.55) to 0.55mm, carrying out longitudinal shearing and edge cutting with the amount of 25mm 2, after edge cutting, continuing cold rolling (pass arrangement: 0.55-0.26) to 0.26mm of aluminum foil rough material, and opening mass flow in the rolling process;
(5) rough rolling: carrying out rough rolling (pass arrangement: 0.26-0.135-0.065-0.03) on the aluminum foil rough stock to 0.03 mm;
(6) rolling: rolling the rough rolled material of 0.03 mm;
(7) finish rolling: after the coiling, finish rolling (pass arrangement: 2 × 0.03-2 × 0.015) is carried out to 2 × 0.015 mm;
(8) rough cutting: after finish rolling, roughly cutting the vertical cut to 2 x 643mm, and passing through a surface and hole detection system;
(9) fine cutting: after the finish rolling, rough cuts were made to 2 x 643mm on vertical slits and passed through a corona device.
The performance test of the finished aluminum foil for the new energy battery shows that the tensile strength is 216MPa, the elongation is 3.3%, the dark surface dyne value is not less than 32.5, and the bright surface dyne value is not less than 31.6. The plate shape is flat, the end surface is neat, the phenomena of obvious burrs, raised edges and wavy edges are avoided, the surface has no defects of rubber roller marks, pockmarks, convex dents, bulging and the like, the dark surface has no obvious bright points, and no wrinkles and soft bars are avoided.
Example 2
The invention relates to a high-performance air conditioner foil and a manufacturing method thereof, which comprises the following components in percentage by mass: 0.095% of Si, 0.49% of Fe0, 0.09% of Cu0, 0.006% of Mn0, 0.03% of Mg0, 0.01% of Zn0.03% of Ti0, the balance of Al, and the ratio of Fe to Si being 5.158.
According to the component control, the aluminum foil material for the new energy battery is further obtained, and the specific preparation steps are as follows:
(1) smelting: when in smelting, the raw materials are fully and uniformly stirred, the smelting temperature is 745 ℃, the raw materials are refined twice and 20 min/time by using a special refining agent at the temperature of 745 ℃, and the raw materials are turned over after the component adjustment meets the control requirement of the invention, and the turning-over temperature is 755 ℃;
(2) casting and rolling: during casting and rolling production, the temperature of a degassing box is controlled at 730 ℃, the air flow is controlled at 30L/min, the speed of a rotor is controlled at 550rpm, the temperature of a filter box is controlled at 720 ℃, a 40+ 60-mesh filter plate is used for double-stage filtration, the temperature of a front box is 700 ℃, the casting and rolling area is controlled at 65mm, the opening degree of a casting nozzle is controlled at 10.5mm, the casting and rolling linear speed is controlled at 880mm/min, and the specification of a cast and rolled aluminum coil finished product is 6.7mm in thickness and 1360mm in width;
(3) cold rolling and intermediate annealing: firstly, cold rolling (pass arrangement: 6.7-4.2-2.1) the cast-rolled blank to 2.1mm, carrying out intermediate annealing at 530 ℃ for 5h, and starting mass flow in the rolling process;
(4) secondary cold rolling and trimming: after intermediate annealing, carrying out secondary cold rolling (pass arrangement: 2.1-1.0-0.55) to 0.55mm, carrying out longitudinal shearing and edge cutting with the amount of 25mm 2, after edge cutting, continuing cold rolling (pass arrangement: 0.55-0.26) to 0.26mm of aluminum foil rough material, and opening mass flow in the rolling process;
(5) rough rolling: carrying out rough rolling (pass arrangement: 0.26-0.135-0.065-0.03) on the aluminum foil rough stock to 0.03 mm;
(6) rolling: rolling the rough rolled material of 0.03 mm;
(7) finish rolling: after the coiling, finish rolling (pass arrangement: 2 × 0.03-2 × 0.015) is carried out to 2 × 0.015 mm;
(8) rough cutting: after finish rolling, roughly cutting the vertical cut to 2 x 643mm, and passing through a surface and hole detection system;
(9) fine cutting: after the finish rolling, rough cuts were made to 2 x 643mm on vertical slits and passed through a corona device.
The performance test of the finished aluminum foil for the new energy battery shows that the tensile strength is 224Mpa, the elongation is 3.6%, the dark surface dyne value is not less than 33.1, and the bright surface dyne value is not less than 31.2. The plate shape is flat, the end surface is neat, the phenomena of obvious burrs, raised edges and wavy edges are avoided, the surface has no defects of rubber roller marks, pockmarks, convex dents, bulging and the like, the dark surface has no obvious bright points, and no wrinkles and soft bars are avoided.
The above description is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that appropriate modifications and optimization can be made based on the technical principle of the present invention, and these modifications and optimization should also be regarded as the protection scope of the present invention.
Claims (13)
1. An aluminum foil for a high-strength and high-elongation new energy battery and a manufacturing method thereof. The composite material is characterized by comprising the following components in percentage by mass: less than or equal to 0.10 percent of Si, 0.30-0.50 percent of Fe, 0.05-0.10 percent of Cu, less than or equal to 0.01 percent of Mn, less than or equal to 0.01 percent of Mg, less than or equal to 0.03 percent of Zn, less than or equal to 0.05 percent of Ti, and the balance of Al.
2. The aluminum foil for a high-strength, high-elongation new energy battery and the method for manufacturing the same as claimed in claim 1, wherein the method comprises the steps of:
(1) smelting: the raw materials are fully and uniformly stirred during smelting, the smelting temperature is 735-755 ℃, the converter reversing temperature is 735-755 ℃, and the Fe/Si is required to be not less than 3;
(2) casting and rolling: the temperature of a front box for cast-rolling production is 690-700 ℃, and the thickness of a cast-rolling aluminum coil finished product is 6.5 +/-0.3 mm;
(3) cold rolling and intermediate annealing: rough rolling the cast and rolled finished product coil to 2.0-4.0 mm for intermediate annealing;
(4) secondary cold rolling and trimming: after intermediate annealing, rolling to 0.4-0.6 mm for trimming, and continuously rolling to the thickness of 0.2-0.3 mm after longitudinally shearing the edges;
(5) rough rolling: carrying out secondary cold rolling and trimming, and then carrying out rough rolling to 0.02-0.04 mm;
(6) rolling: rolling after rough rolling;
(7) finish rolling: after the rolling, performing finish rolling until the thickness of a finished product is 0.01-0.02 mm;
(6) rough cutting: cutting the finished thick material roll to a finished width of + 10-20 mm small roll;
(7) fine cutting: and rewinding the roughly cut small rolls and finely cutting the small rolls to obtain small rolls with the width of +/-0.5 mm of the finished product.
3. The aluminum foil for the high-strength and high-elongation new energy battery and the manufacturing method thereof as claimed in claim 2, wherein pure aluminum ingots (aluminum content is more than or equal to 99.70%) are used for melting in the step (1), and no scrap is allowed to be added.
4. The aluminum foil for the high-strength and high-elongation new energy battery and the manufacturing method thereof according to claim 2, wherein in the step (1), the aluminum foil is refined in a holding furnace for 6h +/-0.5 h/time, and the hydrogen content of the melt is required to be less than or equal to 0.12ml/100g Al.
5. The aluminum foil for the high-strength and high-elongation new energy battery and the manufacturing method thereof according to claim 2, wherein the temperature of the filter box in the step (2) is controlled to be 680-720 ℃, and plate type double-stage filtration is adopted, wherein the first stage filter plate is not smaller than 40 meshes, and the second stage filter plate is not smaller than 60 meshes.
6. The aluminum foil for the high-strength and high-elongation new energy battery and the manufacturing method thereof according to claim 2, wherein the mass flow is required to be started in the rolling process in the steps (3) and (4), the thickness difference is required to be less than or equal to +/-2% when the thickness is 0.2-0.3 mm, and the thickness difference of the whole roll is greater than or equal to 97%.
7. The aluminum foil for the high-strength and high-elongation new energy battery and the manufacturing method thereof as claimed in claim 2, wherein the intermediate annealing process in the step (3) is performed at a temperature of 0.8 ℃/min to 3.0 ℃/min up to 520 to 530 ℃, the holding time is 180 to 300min, and the aluminum foil is taken out of the furnace and cooled.
8. The aluminum foil for the high-strength and high-elongation new energy battery and the manufacturing method thereof according to claim 2, wherein a disc cutter driven by a motor is used for longitudinally cutting the edges in the step (4), the feed amount is controlled to be 60% to 70% of the thickness of the aluminum roll, and the side gap is controlled to be 8% to 10% of the thickness of the aluminum roll.
9. The aluminum foil for new energy batteries having high strength and high elongation and the method for manufacturing the same as claimed in claim 2, wherein the roughness of the work rolls during rough rolling in step (5) is controlled to be Ra: 0.25-0.35 μm, and the convexity is controlled to be Cr: 0.04-0.05 mm.
10. The aluminum foil for the high-strength and high-elongation new energy battery and the manufacturing method thereof as claimed in claim 2, wherein the flow rate of the double-oil is controlled to 7 to 8L/h during the rolling in the step (6).
11. The aluminum foil for high-strength, high-elongation new energy battery and the manufacturing method thereof as claimed in claim 2, wherein the roughness of the work roll is controlled to Ra: 0.10-0.15 μm, and the convexity is controlled to be Cr: 0.04-0.06 mm.
12. The aluminum foil for high-strength high-elongation new energy battery and the manufacturing method thereof as claimed in claim 2, wherein the surface and hole detection system is passed during rough cutting in step (8).
13. The aluminum foil for the high-strength and high-elongation new energy battery and the manufacturing method thereof as claimed in claim 2, wherein a special butterfly knife with servo motor drive and self-lubrication is finely cut in the step (9), the feed amount is controlled to be 0.4 ± 0.2mm, and the aluminum foil passes through a corona device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210016931.5A CN114525432A (en) | 2022-01-08 | 2022-01-08 | High-strength and high-extension aluminum foil for new energy battery and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210016931.5A CN114525432A (en) | 2022-01-08 | 2022-01-08 | High-strength and high-extension aluminum foil for new energy battery and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114525432A true CN114525432A (en) | 2022-05-24 |
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| CN115094275A (en) * | 2022-06-23 | 2022-09-23 | 江苏鼎胜新能源材料股份有限公司 | Low-pinhole ultra-wide battery foil for new energy battery and preparation method thereof |
| CN115216669A (en) * | 2022-07-09 | 2022-10-21 | 浙江佑丰新材料股份有限公司 | Material for new energy battery aluminum shell for continuous die stamping and manufacturing method thereof |
| CN115323223A (en) * | 2022-07-27 | 2022-11-11 | 甘肃东兴铝业有限公司 | Processing method for preparing foil blank of 1235 aluminum alloy new energy battery |
| CN115386702A (en) * | 2022-07-07 | 2022-11-25 | 浙江桐昆新材料研究院有限公司 | Material for new energy battery aluminum shell suitable for continuous die stamping and manufacturing method thereof |
| CN115927919A (en) * | 2022-11-14 | 2023-04-07 | 嘉兴维勒新材料有限公司 | Household baked aluminum foil with bright double surfaces and manufacturing method thereof |
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Application publication date: 20220524 |