CN110484785A - A kind of high-performance power battery aluminium foil preparation process - Google Patents
A kind of high-performance power battery aluminium foil preparation process Download PDFInfo
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- CN110484785A CN110484785A CN201910898619.1A CN201910898619A CN110484785A CN 110484785 A CN110484785 A CN 110484785A CN 201910898619 A CN201910898619 A CN 201910898619A CN 110484785 A CN110484785 A CN 110484785A
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- aluminium foil
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- 239000005030 aluminium foil Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000000137 annealing Methods 0.000 claims abstract description 31
- 238000005097 cold rolling Methods 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 238000005266 casting Methods 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims abstract description 14
- 230000008018 melting Effects 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 230000000994 depressogenic effect Effects 0.000 claims description 88
- 239000011888 foil Substances 0.000 claims description 32
- 229910052782 aluminium Inorganic materials 0.000 claims description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 28
- 238000010926 purge Methods 0.000 claims description 28
- 238000005096 rolling process Methods 0.000 claims description 26
- 238000001914 filtration Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 22
- 229910000838 Al alloy Inorganic materials 0.000 claims description 20
- 238000007872 degassing Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 17
- 239000011572 manganese Substances 0.000 claims description 11
- 229910052786 argon Inorganic materials 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000009749 continuous casting Methods 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 229910000906 Bronze Inorganic materials 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 241000220317 Rosa Species 0.000 claims description 4
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 4
- 239000010974 bronze Substances 0.000 claims description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 238000005204 segregation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910016343 Al2Cu Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
Abstract
The invention belongs to acieral technical fields, a kind of high-performance power battery aluminium foil preparation process are disclosed, according to mass percent are as follows: Fe:0.4%~0.55%；Si:0.1%~0.20%；Cu:0.05%~0.15%；Mn:0.05%~0.15%；Mg≤0.05%；Ti:0.01%~0.015%；Zn:0.05~0.1%；Al >=99.00%, surplus are inevitable impurity.Melting, casting obtain 6.0 ± 0.2mm blank, by the carry out homogenizing annealing of blank, carry out being cold-rolled to 1.8mm for the first time after cooling, then carry out intermediate annealing, through secondary cold-rolling to 0.2mm after cooling, carry out trimming.The present invention improves the intensity and toughness of product, and tensile strength reaches 245MP, and elongation percentage reaches 3.5%, and comprehensive mechanical property is higher than domestic similar product.
Description
Technical field
The invention belongs to acieral technical field more particularly to a kind of high-performance power battery aluminium foil preparation processes.
Background technique
Currently, the prior art commonly used in the trade is such that power battery aluminium foil usually as the positive pole current collections of lithium ion battery
Device, with the development of battery technology, especially in new-energy automobile field, to battery capacity, more stringent requirements are proposed, battery industry
It also proposed the requirement of high-strength high-elongation ratio with aluminium foil to power battery.Domestic power battery aluminium foil include 1235,1100,
1060,8079 etc., thickness is thicker, and tensile strength, elongation percentage are all poor so that the capacity of battery is smaller, service life compared with
It is short.It is a problem to be solved that tensile strength and the higher power battery of elongation percentage, which are produced, with aluminium foil.Usually by using molten
Body continuous casting and rolling plate passes through intermediate annealing of the temperature higher than recrystallization temperature only through blank made of cold rolling to eliminate
Processing hardening and internal stress.Right the method aluminum foil stock blank produced due in heat treatment process atom diffusion it is insufficient,
It is uneven to be also widely present structural constituent, the defects of component segregation causes aluminium foil production yield rate low, and surface quality is poor, occurs big
The pin hole etc. of amount, is unable to satisfy the production of high-quality ultra-thin aluminum foil.Obtain that surface quality is good, deformation resistance, processing hardening
The blank that rate is low, even tissue is segregated less, improved heat treating regime are also particularly important.
In conclusion problem of the existing technology is: it is uneven that the aluminum foil stock of existing production is also widely present structural constituent,
The defects of component segregation, causes aluminium foil production yield rate low, and surface quality is poor, a large amount of pin hole etc. occurs, is unable to satisfy Gao Pin
The production of matter ultra-thin aluminum foil；Cause battery aluminum foil thickness thicker, tensile strength, elongation percentage are all poor, so that the capacity of battery
Smaller, service life is shorter.
Solve the difficulty and meaning of above-mentioned technical problem: the difficult point to solve the above problems is at the determination and heat of composition proportion
The solution of the matching of science and engineering skill, technical problem is significant to the service life and raising battery current collecting efficiency that extend battery.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of double zero high-performance power battery aluminium foil preparation processes.
The invention is realized in this way a kind of power battery aluminium foil, it to be aluminium foil base conventional one that the present invention is based on strengthening mechanisms
Optimized alloy ingredient on plinth adds laboratory research influence of each composition proportion to mechanical property by theory.To improve aluminium foil
Ductility increases tiny globular α phase, and suitably promotion Fe, Si content, Fe/Si are controlled in 2~5 ranges, is 4 or so；Utilize Mn
Effect reduce Fe, Si ill effect, promote the elements such as Mn, Cu, Zn in the appropriate range, introduce Al6Mn, Al2Cu etc. and strengthen
Phase, and the solution strengthening effect of each element is made full use of, elongation percentage is not reduced while improving intensity, so that final finished is prolonged
Stretch rate raising.The aluminium foil is according to mass percent are as follows: Fe:0.4%~0.55%；Si:0.1%~0.20%；Cu:0.05%
~0.15%；Mn:0.05%~0.15%；Mg≤0.05%；Ti:0.01%~0.015%；Zn:0.05~0.1%；Al≥
99.00%, surplus is impurity.
Another object of the present invention is to provide a kind of high-performance power battery aluminium foil preparation process, the high-performance is dynamic
Power battery aluminium foil preparation process includes the following steps:
Melting, casting: step 1 will be closed by above-mentioned aluminium alloy standard analysis among technical pure aluminium ingot, aluminium silicon intermediate alloy, aluminum bronze
Gold, manganese agent are matched and are weighed, and are smelted into aluminium alloy melt；It successively stood, refined, filtration treatment；After filtering again
Aluminium alloy melt continuous casting and rolling at 6.0 ± 0.2mm blank；
Step 2, homogenizing annealing:
1) 550~570 DEG C × 2h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；
2) 550~570 DEG C × 9~14h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is
60%, negative pressure switch is closed；
Once cold rolling: blank is carried out seven passes, sotck thinkness is rolled down to 1.8mm by 6.0mm by step 3；
Step 4, intermediate annealing:
1) 440~460 DEG C × 2h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；
2) 440~460 DEG C × 6h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；If incoming band oil mass is big, the blower open amount of purge step is set as by this step and previous step
100%.
3) 440~460 DEG C × 5~8h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is
50%, negative pressure switch is closed；
4) 360~380 DEG C × 2h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is 40%,
Negative pressure switch is closed；
It is 2 hours cooling, it opens 1/3 fire door cooling 2 hours and comes out of the stove；
Secondary cold-rolling: blank is carried out seven passes, sotck thinkness is rolled down to 0.2mm by 1.8mm by step 5；
Step 6, foil roll:, will by aluminium foil finish rolling that cold-rolling thickness is 0.20mm at the aluminum foil coil with a thickness of 0.010~0.015mm
Aluminum foil coil cuts to obtain finished product.
Further, when the step 1 melting, after feeding intake at 730~750 DEG C melting 2 hours, stood in standing furnace 1 small
When, it is refined in 720~740 DEG C, refining time is 20~30min, and refining is primary per hour, refines 2 times, pulls out altogether per hour
Slag is primary, finally handles through Rose Box, and filtering is to use double-stage filtering plate filtering and removing slag, and using import filter plate, filtering accuracy is
60 mesh；
Degasification slagging-off is to be passed through high-purity argon gas into degasification tank to carry out degasification to aluminium alloy melt, and argon pressure is in 0.4-
0.5Mpa, the temperature of degasification tank melt are 730 DEG C~740 DEG C, will float up to melt with hydrogen gas bubbles in degasification tank every 1 hour
The dross on surface is taken off；
680~710 DEG C of case melt temperature before when casting, 4.5~5.0mm of roll gap, 55~60mm of roll, bast mouth opening degree
10~12mm 45~60N of coiling tension, 800~900mm/min of roll casting speed, 25~40 DEG C of cooler-water temperature；At crystal grain refinement
Al-5Ti-B grain refiner need to be added when reason, additional amount is 1.5kg/ tons of aluminium alloys.
Further, the step 2 homogenizing annealing 2) in, when blank specification is 6.0 × (900~1300) mm, finished product blank rule
Lattice are 0.30 × (870~1270) mm, time 9.5h；When blank specification is 6.0 × (1300~1600) mm, finished product blank rule
Lattice are 0.30 × (1270~1570) mm, time 11h；When blank specification is 6.0 × (1600~1900) mm, finished product blank rule
Lattice are 0.30 × (1560~1860) mm, time 13h；It is 2.5 hours cooling after step 2), open 1/2 fire door cooling 3
Hour comes out of the stove.
Further, when the step 3 carries out once cold rolling rolling, process flow are as follows: the first passage is depressed into 5.6mm by 6mm, the
Two passages are depressed into 5.1mm by 5.6mm, and third passage is depressed into 4.4mm by 5.1mm, and four-pass is depressed into 3.4mm by 4.4mm, and the 5th
Passage is depressed into 2.7mm by 3.2mm, and the 6th passage is depressed into 2.2mm by 2.7mm, and the 7th passage is depressed into 1.8mm by 2.2mm.
Further, the step 4 intermediate annealing 3) in, when cold rolling blank specification is 1.8 × (1000~1400) mm, finished product base
Gauge lattice are 0.30 × (940~1340) mm, when annealing every 4~5 material volumes of furnace, the time is set as 5.5h；3~4 material volumes, when
Between be set as 5h；When blank specification is 1.8 × (1400~1800) mm, finished product blank specification is 0.30 × (1340~1740)
Mm, when annealing every 4~5 material volumes of furnace, the time is set as 6h；3~4 material volumes, time are set as 5.5h；；Blank specification is 1.8
When the mm of × (1800~2200), finished product blank specification is 0.30 × (1740~2140) mm, when annealing every 4~5 material volumes of furnace, when
Between be set as 7h；3~4 material volumes, time are set as 6.5h；It is 2 hours cooling after step 4), open 1/2 fire door cooling 3
Hour comes out of the stove.
Further, when the step 5 carries out secondary cold-rolling rolling, process flow are as follows: the first passage is depressed into 1.7mm by 1.8mm,
Second passage is depressed into 1.5mm by 1.7mm, and third passage is depressed into 1.2mm by 1.5mm, and four-pass is depressed into 0.8mm by 1.2mm, the
Five passages are depressed into 0.5mm by 0.8mm, and the 6th passage is depressed into 0.3mm by 0.5mm, and the 7th passage is depressed into 0.1mm by 0.3mm.
Further, when the step 6 carries out foil rolling, process flow are as follows: when producing the aluminium foil of 0.010mm, the first passage
0.112mm is depressed by 0.2mm, the second passage is depressed into 0.062mm by 0.112mm, and third passage is depressed into 0.032mm by 0.062mm,
Four-pass is depressed into 0.012mm by 0.032mm；
When producing the aluminium foil of 0.015mm, the first passage is depressed into 0.130mm by 0.2mm, and the second passage is depressed by 0.138mm
0.080mm, third passage are depressed into 0.040mm by 0.080mm, and four-pass is depressed into 0.015 by 0.040mm.
Another object of the present invention is to provide a kind of power batteries prepared by the aluminium foil.
Another object of the present invention is to provide a kind of new-energy automobiles for being equipped with the power battery.
In conclusion advantages of the present invention and good effect are as follows: after 1. adjustment 1235 alloying components proportions, improve the power of product
Performance indicator is learned, while improving aluminium foil tensile strength, elongation percentage.2. the optimization of heat treatment process, rolling mill practice is combined, into one
Step optimizes the tissue and mechanical property, surface quality of product.
Detailed description of the invention
Fig. 1 is double zero high-performance power battery aluminium foil preparation technology flow charts provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, the present invention is carried out
It is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit
The present invention.
Thicker with aluminum foil thickness for existing battery, tensile strength, elongation percentage are all poor, so that the capacity of battery is smaller, use
Service life shorter problem；The intensity and toughness of product are improved, tensile strength reaches 245MP, and elongation percentage reaches 3.5%, synthesis
Mechanical property is higher than domestic similar product.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
Aluminium foil provided in an embodiment of the present invention is according to mass percent are as follows: Fe:0.4%~0.55%；Si:0.1%~0.25%；
Cu:0.05%~0.15%；Mn:0.05%~0.15%；Mg≤0.05%；Ti:0.01%~0.015%；Zn:0.05~
0.1%；Al >=99.00%, surplus are impurity.
As shown in Figure 1, double zero high-performance power battery aluminium foil preparation process provided in an embodiment of the present invention the following steps are included:
S101: it melting, casting: will be closed among technical pure aluminium ingot, aluminium silicon intermediate alloy, aluminum bronze by above-mentioned aluminium alloy standard analysis
Gold, manganese agent are matched and are weighed, and are smelted into aluminium alloy melt；It successively stood, refined, filtration treatment；After filtering again
Aluminium alloy melt continuous casting and rolling at 6.0 ± 0.2mm blank；
S102: homogenizing annealing:
1) 550~570 DEG C × 2h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；
2) 550~570 DEG C × 9~14h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is
60%, negative pressure switch is closed；
S103: once cold rolling: blank is subjected to seven passes, sotck thinkness is rolled down to 1.8mm by 6.0mm；
S104: intermediate annealing:
1) 440~460 DEG C × 2h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；
2) 440~460 DEG C × 6h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；If incoming band oil mass is big, the blower open amount of purge step is set as by this step and previous step
100%.
3) 440~460 DEG C × 5~8h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is
50%, negative pressure switch is closed；
4) 360~380 DEG C × 2h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is 40%,
Negative pressure switch is closed；
It is 2 hours cooling, it opens 1/3 fire door cooling 2 hours and comes out of the stove；
S105: secondary cold-rolling: blank is subjected to seven passes, sotck thinkness is rolled down to 0.2mm by 1.8mm；
S106: foil rolls: by cold-rolling thickness be 0.20mm aluminium foil finish rolling at the aluminum foil coil with a thickness of 0.010~0.015mm, by aluminium
Foil volume cuts to obtain finished product.
In a preferred embodiment of the invention, when the step S101 melting, after feeding intake at 730~750 DEG C melting 2 hours,
1 hour is stood in standing furnace, is refined in 720~740 DEG C, refining time is 20~30min, and refining is primary per hour,
It refines 2 times altogether, it is primary to pull out slag per hour, finally handles through Rose Box, and filtering is with double-stage filtering plate filtering and removing slag, using import
Filter plate, filtering accuracy are 60 mesh；
Degasification slagging-off is to be passed through high-purity argon gas into degasification tank to carry out degasification to aluminium alloy melt, and argon pressure is in 0.4-
0.5Mpa, the temperature of degasification tank melt are 730 DEG C~740 DEG C, will float up to melt with hydrogen gas bubbles in degasification tank every 1 hour
The dross on surface is taken off；
680~710 DEG C of case melt temperature before when casting, 4.5~5.0mm of roll gap, 55~60mm of roll, bast mouth opening degree
10~12mm 45~60N of coiling tension, 800~900mm/min of roll casting speed, 25~40 DEG C of cooler-water temperature；At crystal grain refinement
Al-5Ti-B grain refiner need to be added when reason, additional amount is 1.5kg/ tons of aluminium alloys.
In a preferred embodiment of the invention, the step S102 homogenizing annealing 2) in, blank specification be 6.0 × (900~
1300) when mm, finished product blank specification is 0.30 × (870~1270) mm, time 9.5h；Blank specification be 6.0 × (1300~
1600) when mm, finished product blank specification is 0.30 × (1270~1570) mm, time 11h；Blank specification be 6.0 × (1600~
1900) when mm, finished product blank specification is 0.30 × (1560~1860) mm, time 13h；After step 2), cooling 2.5 is small
When, it opens 1/2 fire door cooling 3 hours and comes out of the stove.
In a preferred embodiment of the invention, when the step S103 carries out once cold rolling rolling, process flow are as follows: the first passage
5.6mm is depressed by 6mm, the second passage is depressed into 5.1mm by 5.6mm, and third passage is depressed into 4.4mm by 5.1mm, four-pass by
4.4mm is depressed into 3.4mm, and the 5th passage is depressed into 2.7mm by 3.2mm, and the 6th passage is depressed into 2.2mm by 2.7mm, the 7th passage by
2.2mm is depressed into 1.8mm.
In a preferred embodiment of the invention, the step S104 intermediate annealing 3) in, cold rolling blank specification is 1.8 × (1000
~1400) when mm, finished product blank specification is 0.30 × (940~1340) mm, when annealing every 4~5 material volumes of furnace, the time is set as
5.5h；3~4 material volumes, time are set as 5h；When blank specification is 1.8 × (1400~1800) mm, finished product blank specification is
0.30 × (1340~1740) mm, when annealing every 4~5 material volumes of furnace, the time is set as 6h；3~4 material volumes, time are set as
5.5h；；When blank specification is 1.8 × (1800~2200) mm, finished product blank specification is 0.30 × (1740~2140) mm, annealing
When every 4~5 material volumes of furnace, the time is set as 7h；3~4 material volumes, time are set as 6.5h；After step 4), cooling 2 is small
When, it opens 1/2 fire door cooling 3 hours and comes out of the stove.
In a preferred embodiment of the invention, when the step S105 carries out secondary cold-rolling rolling, process flow are as follows: the first passage
1.7mm is depressed by 1.8mm, the second passage is depressed into 1.5mm by 1.7mm, and third passage is depressed into 1.2mm by 1.5mm, four-pass by
1.2mm is depressed into 0.8mm, and the 5th passage is depressed into 0.5mm by 0.8mm, and the 6th passage is depressed into 0.3mm by 0.5mm, the 7th passage by
0.3mm is depressed into 0.1mm.
In a preferred embodiment of the invention, when the step S106 carries out foil rolling, process flow are as follows: work as production
When the aluminium foil of 0.010mm, the first passage is depressed into 0.112mm by 0.2mm, and the second passage is depressed into 0.062mm, third by 0.112mm
Passage is depressed into 0.032mm by 0.062mm, and four-pass is depressed into 0.012mm by 0.032mm；
When producing the aluminium foil of 0.015mm, the first passage is depressed into 0.130mm by 0.2mm, and the second passage is depressed by 0.138mm
0.080mm, third passage are depressed into 0.040mm by 0.080mm, and four-pass is depressed into 0.015 by 0.040mm.
The quality standard of cast-rolling stock are as follows: with plate it is poor≤0.04, convexity 0.01-0.05mm, 1 grade of grain size, longitudinal tolerance≤
0.1.There is no the striped for influencing to use and segregations on technique raw edges≤Casting Rolled Sheet coarse micro-grain sample surface 1.5mm.Foil rolls into product qualification
Template standard are as follows: measuring unit tension is 1kgf/mm2, effective travel 2.5m, the amount of staying≤3.5mm.
Application principle of the invention is further described combined with specific embodiments below.
Embodiment 1: a kind of power battery is Fe:0.4% with high-performance aluminium foil ingredient and mass percent；Si:0.1%；Cu:
0.10%；Mn:0.05%；Mg≤0.05%；Ti:0.01%~0.015%；Zn:0.05%；Al >=99.00%, surplus are not
Evitable impurity.
Above-mentioned power battery high-performance aluminium foil and its production method, include the following steps:
(1) melting, casting: by above-mentioned aluminium alloy standard analysis by technical pure aluminium ingot, aluminium silicon intermediate alloy, aluminum bronze intermediate alloy,
Manganese agent etc. is matched and is weighed, and is smelted into aluminium alloy melt；Then it successively stood, refined, filtration treatment；It again will filtering
Aluminium alloy melt continuous casting and rolling afterwards at 6.0 × 1300mm blank.
(2) homogenizing annealing: high temperature homogenizing annealing is divided into two steps
1) 550~570 DEG C × 2h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；
2) 550~570 DEG C × 9.5h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is
60%, negative pressure switch is closed；
(3) once cold rolling: carrying out seven passes for blank, and sotck thinkness is rolled down to 1.8mm by 6.0mm, obtain 1.8 ×
1400mm once cold rolling blank.
(4) intermediate annealing: intermediate annealing is carried out in four steps
1) 440~460 DEG C × 2h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；
2) 440~460 DEG C × 6h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；If incoming band oil mass is big, the blower open amount of purge step is set as by this step and previous step
100%.
3) 440~460 DEG C × 6h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is 50%,
Negative pressure switch is closed；
4) 360~380 DEG C × 2h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is 40%,
Negative pressure switch is closed；
4~5 material volumes of every furnace when annealing, after cooling 2 hours, open 1/3 fire door cooling 2 hours and come out of the stove；
(5) secondary cold-rolling: blank is subjected to seven passes, sotck thinkness is rolled down to 0.2mm by 1.8mm；
(6) foil rolls: by cold-rolling thickness be 0.20mm aluminium foil finish rolling at the aluminum foil coil with a thickness of 0.010mm, aluminum foil coil is cut
Obtain finished product.
When above-mentioned steps (1) melting, after feeding intake at 740 DEG C melting 2 hours, then stand 1 hour in standing furnace, then at
730 DEG C are refined, refining time 25min, and refining is primary per hour, and twice, slagging-off is primary per hour for refining altogether, are most passed through afterwards
Rose Box processing.Degasification slagging-off is to be passed through high-purity argon gas into degasification tank to carry out degasification to aluminium alloy melt, adjusts graphite rotator
Revolving speed, guarantees hydrogen content≤0.10ml/100gAl of molten aluminum, purity of argon 99.99%, argon pressure in 0.4-0.5Mpa,
The temperature of degasification tank melt is 730 DEG C~740 DEG C, will float up to bath surface with hydrogen gas bubbles in degasification tank every 1 hour
Dross is taken off.Filtering is to use double-stage filtering plate filtering and removing slag, and using import filter plate, filtering accuracy is 60 mesh.Case before when casting
680~710 DEG C of melt temperature, 4.5~5.0mm of roll gap, 55~60mm of roll, 10~12mm of bast mouth opening degree are batched
45~60N of power, roll casting speed 850mm/min, 30 DEG C of cooler-water temperature.It is thin that Al-5Ti-B crystal grain need to be added when crystal grain refinement processing
Agent, additional amount are 1.5kg/ tons of aluminium alloys.
When above-mentioned steps (3) carry out once cold rolling rolling, process flow are as follows: the first passage is depressed into 5.6mm, the second passage by 6mm
5.1mm is depressed by 5.6mm, third passage is depressed into 4.4mm by 5.1mm, and four-pass is depressed into 3.4mm by 4.4mm, the 5th passage by
3.2mm is depressed into 2.7mm, and the 6th passage is depressed into 2.2mm by 2.7mm, and the 7th passage is depressed into 1.8mm by 2.2mm.
When above-mentioned steps (6) carry out foil rolling, process flow are as follows:
First passage is depressed into 0.112mm by 0.2mm, and the second passage is depressed into 0.062mm by 0.112mm, and third passage is by 0.062mm
It is depressed into 0.032mm, four-pass is depressed into 0.012mm by 0.032mm；
The quality standard of cast-rolling stock are as follows: with plate it is poor≤0.04, convexity 0.01-0.05mm, 1 grade of grain size, longitudinal tolerance≤
0.1.There is no the striped for influencing to use and segregations on technique raw edges≤Casting Rolled Sheet coarse micro-grain sample surface 1.5mm.
Foil rolls into product qualification template standard are as follows: measuring unit tension be 1kgf/mm2, effective travel 2.5m, the amount of staying≤
3.5mm.Aluminum foil thickness is 0.010mm.
Embodiment 2: a kind of power battery is Fe:0.45% with high-performance aluminium foil ingredient and mass percent；Si:0.12%；Cu:
0.12%；Mn:0.05%；Mg≤0.05%；Ti:0.01%~0.015%；Zn:0.05%；Al >=99.00%, surplus are not
Evitable impurity.
Above-mentioned power battery high-performance aluminium foil and its production method, include the following steps:
(1) melting, casting-rolling technology are the same as example 1
(2) homogenizing annealing process is the same as example 1
(3) once cold rolling: carrying out seven passes for blank, and sotck thinkness is rolled down to 1.8mm by 6.0mm, obtain 1.8 ×
2000mm once cold rolling blank.
(4) intermediate annealing process is the same as example 1
(5) secondary cold-rolling: blank is subjected to seven passes, sotck thinkness is rolled down to 0.2mm by 1.8mm；
(6) foil rolls: by cold-rolling thickness be 0.20mm aluminium foil finish rolling at the aluminum foil coil with a thickness of 0.006mm, aluminum foil coil is cut
Obtain finished product.
When above-mentioned steps (3) carry out once cold rolling rolling, process flow are as follows: the first passage is depressed into 5.6mm, the second passage by 6mm
5.1mm is depressed by 5.6mm, third passage is depressed into 4.4mm by 5.1mm, and four-pass is depressed into 3.4mm by 4.4mm, the 5th passage by
3.2mm is depressed into 2.7mm, and the 6th passage is depressed into 2.2mm by 2.7mm, and the 7th passage is depressed into 1.8mm by 2.2mm.
When above-mentioned steps (6) carry out foil rolling, process flow are as follows:
When producing the aluminium foil of 0.015mm, the first passage is depressed into 0.130mm by 0.2mm, and the second passage is depressed by 0.138mm
0.080mm, third passage are depressed into 0.040mm by 0.080mm, and four-pass is depressed into 0.015 by 0.040mm.
The quality standard of cast-rolling stock are as follows: with plate it is poor≤0.04, convexity 0.01-0.05mm, 1 grade of grain size, longitudinal tolerance≤
0.1.There is no the striped for influencing to use and segregations on technique raw edges≤Casting Rolled Sheet coarse micro-grain sample surface 1.5mm.
Foil rolls into product qualification template standard are as follows: measuring unit tension is 1kgf/mm2, effective travel 2.5m, the amount of staying≤
3.5mm.Aluminum foil thickness is 0.006mm.
Present example testing result and with domestic similar product compare it is as follows.
| Example 1 | Example 2 | Domestic existing similar product | |
| Thickness | 0.012mm | 0.015mm | 0.010~0.030mm |
| Tensile strength | ≥245Mpa | ≥245Mpa | ≥180Mpa |
| Elongation percentage | >=3.0% | >=3.5% | >=1.5% |
In conclusion battery aluminium foil tensile strength and elongation percentage that preparation method of the invention produces are much higher than domestic similar production
Product, comprehensive mechanical property are excellent.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (10)
1. a kind of double-zero aluminum foil, which is characterized in that the aluminium foil is according to mass percent are as follows: Fe:0.4%~0.55%；Si:
0.1%~0.20%；Cu:0.05%~0.15%；Mn:0.05%~0.15%；Mg≤0.05%；Ti:0.01%~
0.015%；Zn:0.05~0.1%；Al >=99.00%, surplus are impurity.
2. a kind of high-performance power battery aluminium foil preparation process of double-zero aluminum foil as described in claim 1, which is characterized in that institute
High-performance power battery aluminium foil preparation process is stated to include the following steps:
Melting, casting: step 1 will be closed by above-mentioned aluminium alloy standard analysis among technical pure aluminium ingot, aluminium silicon intermediate alloy, aluminum bronze
Gold, manganese agent are matched and are weighed, and are smelted into aluminium alloy melt；It successively stood, refined, filtration treatment；After filtering again
Aluminium alloy melt continuous casting and rolling at 6.0 ± 0.2mm blank；
Step 2, homogenizing annealing:
1) 550~570 DEG C × 2h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；
2) 550~570 DEG C × 9~14h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is
60%, negative pressure switch is closed；
Once cold rolling: blank is carried out seven passes, sotck thinkness is rolled down to 1.8mm by 6.0mm by step 3；
Step 4, intermediate annealing:
1) 440~460 DEG C × 2h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；
2) 440~460 DEG C × 6h, the open amount of blower is 100% to open when circulation, and the blower open amount of purge step is
80%, negative pressure switch is opened；If incoming band oil mass is big, the blower open amount of purge step is set as by this step and previous step
100%；
3) 440~460 DEG C × 5~8h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is
50%, negative pressure switch is closed；
4) 360~380 DEG C × 2h, the open amount of blower is 80% to open when circulation, and the blower open amount of purge step is 40%,
Negative pressure switch is closed；
It is 2 hours cooling, it opens 1/3 fire door cooling 2 hours and comes out of the stove；
Secondary cold-rolling: blank is carried out seven passes, sotck thinkness is rolled down to 0.2mm by 1.8mm by step 5；
Step 6, foil roll:, will by aluminium foil finish rolling that cold-rolling thickness is 0.20mm at the aluminum foil coil with a thickness of 0.010~0.015mm
Aluminum foil coil cuts to obtain finished product.
3. high-performance power battery as claimed in claim 2 aluminium foil preparation process, which is characterized in that the step 1 melting
When, after feeding intake at 730~750 DEG C melting 2 hours, stand 1 hour in standing furnace, refined in 720~740 DEG C, essence
The refining time is 20~30min, and refining is primary per hour, is refined 2 times altogether, and it is primary to pull out slag per hour, is finally handled through Rose Box, mistake
Filter is to use double-stage filtering plate filtering and removing slag, and using import filter plate, filtering accuracy is 60 mesh；
Degasification slagging-off is to be passed through high-purity argon gas into degasification tank to carry out degasification to aluminium alloy melt, and argon pressure is in 0.4-
0.5Mpa, the temperature of degasification tank melt are 730 DEG C~740 DEG C, will float up to melt with hydrogen gas bubbles in degasification tank every 1 hour
The dross on surface is taken off；
680~710 DEG C of case melt temperature before when casting, 4.5~5.0mm of roll gap, 55~60mm of roll, bast mouth opening degree
10~12mm 45~60N of coiling tension, 800~900mm/min of roll casting speed, 25~40 DEG C of cooler-water temperature；At crystal grain refinement
Al-5Ti-B grain refiner need to be added when reason, additional amount is 1.5kg/ tons of aluminium alloys.
4. high-performance power battery as claimed in claim 2 aluminium foil preparation process, which is characterized in that the step 2 is uniform
Annealing 2) in, when blank specification is 6.0 × (900~1300) mm, finished product blank specification is 0.30 × (870~1270) mm,
Time is 9.5h；When blank specification is 6.0 × (1300~1600) mm, finished product blank specification is 0.30 × (1270~1570)
Mm, time 11h；When blank specification is 6.0 × (1600~1900) mm, finished product blank specification is 0.30 × (1560~1860)
Mm, time 13h；It is 2.5 hours cooling after step 2), it opens 1/2 fire door cooling 3 hours and comes out of the stove.
5. high-performance power battery as claimed in claim 2 aluminium foil preparation process, which is characterized in that the step 3 carries out
When once cold rolling rolls, process flow are as follows: the first passage is depressed into 5.6mm by 6mm, and the second passage is depressed into 5.1mm by 5.6mm, the
Three passages are depressed into 4.4mm by 5.1mm, and four-pass is depressed into 3.4mm by 4.4mm, and the 5th passage is depressed into 2.7mm by 3.2mm, and the 6th
Passage is depressed into 2.2mm by 2.7mm, and the 7th passage is depressed into 1.8mm by 2.2mm.
6. high-performance power battery as claimed in claim 2 aluminium foil preparation process, which is characterized in that among the step 4
In annealing 3), when cold rolling blank specification is 1.8 × (1000~1400) mm, finished product blank specification is 0.30 × (940~1340)
Mm, when annealing every 4~5 material volumes of furnace, the time is set as 5.5h；3~4 material volumes, time are set as 5h；Blank specification is 1.8
When the mm of × (1400~1800), finished product blank specification is 0.30 × (1340~1740) mm, when annealing every 4~5 material volumes of furnace, when
Between be set as 6h；3~4 material volumes, time are set as 5.5h；When blank specification is 1.8 × (1800~2200) mm, finished product blank
Specification is 0.30 × (1740~2140) mm, when annealing every 4~5 material volumes of furnace, the time is set as 7h；3~4 material volumes, time
It is set as 6.5h；It is 2 hours cooling after step 4), it opens 1/2 fire door cooling 3 hours and comes out of the stove.
7. high-performance power battery as claimed in claim 2 aluminium foil preparation process, which is characterized in that the step 5 carries out
When secondary cold-rolling rolls, process flow are as follows: the first passage is depressed into 1.7mm by 1.8mm, and the second passage is depressed into 1.5mm by 1.7mm,
Third passage is depressed into 1.2mm by 1.5mm, and four-pass is depressed into 0.8mm by 1.2mm, and the 5th passage is depressed into 0.5mm by 0.8mm, the
Six passages are depressed into 0.3mm by 0.5mm, and the 7th passage is depressed into 0.1mm by 0.3mm.
8. high-performance power battery as claimed in claim 2 aluminium foil preparation process, which is characterized in that the step 6 carries out
When foil rolling, process flow are as follows: when producing the aluminium foil of 0.010mm, the first passage is depressed into 0.112mm, second by 0.2mm
Secondary to be depressed into 0.062mm by 0.112mm, third passage is depressed into 0.032mm by 0.062mm, and four-pass is depressed by 0.032mm
0.012mm；
When producing the aluminium foil of 0.015mm, the first passage is depressed into 0.130mm by 0.2mm, and the second passage is depressed by 0.138mm
0.080mm, third passage are depressed into 0.040mm by 0.080mm, and four-pass is depressed into 0.015 by 0.040mm.
9. a kind of power battery of the preparation of the aluminium foil as described in claim 1.
10. a kind of new-energy automobile for being equipped with power battery described in claim 9.
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| CN110983126A (en) * | 2020-01-10 | 2020-04-10 | 广西百矿润泰铝业有限公司 | Preparation method of 5754 alloy aluminum plate for automobile |
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