CN104388766B - Production method of aluminum foil for lithium-ion battery - Google Patents
Production method of aluminum foil for lithium-ion battery Download PDFInfo
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Abstract
The invention relates to smelting, cast rolling and calendering of non-ferrous metals, and in particular relates to a production method of an aluminum foil for a lithium-ion battery. By using the production method of the aluminum foil for the lithium-ion battery, the mechanical property and the plasticity of the aluminum foil for the lithium-ion battery are improved, meanwhile, the thickness of the aluminum foil is reduced, and the battery capacity is increased. The production method of the aluminum foil for the lithium-ion battery is simple.
Description
Technical field
The present invention relates to smelting non-ferrous metal, casting and calendering, the production method of a kind of lithium ion battery aluminium foil.
Background technology
At present, the aluminium foil of the lithium ion battery sold on market, tensile strength and elongation percentage index are low, material plasticity is poor, easily there is backfin problem of Cracking in the coating that uses in lower operation, nipping process, lifting battery electric quantity and product are had a negative impact service life, is also one of bottleneck that govern lithium-ion-power cell industry development.
Summary of the invention
Solve the technical problem that the production method being to provide a kind of lithium ion battery aluminium foil needed for the present invention, improve lithium ion battery aluminium foil tensile strength and elongation percentage index, meanwhile, thinning aluminum foil thickness, promote battery capacity.
The technical solution adopted for the present invention to solve the technical problems is: include following several step: include following several step: first step melting: 1. by the fine aluminium ingot through dispensing, add a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loads in fusing stove, 2. fusing: a. stirring melt for the first time；B. thermometric；C. second time stirring melt；D. preanalysis is sampled；E. composition adjustment；F. argon refine is used；G. skim；H. 20～30 points are stood；I. aluminium titanium boron wire fining agent, addition 1.4～2.1kg/t are added；J. extreme climate emergency processing；K. smelting temperature is 730～750 DEG C, and 3. holding temperature is 710～740 DEG C, 4. uses chlorine to add argon and carries out degasification, and argon chlorine fraction is 20:1,5. uses three well tubular filters to filter；Second step casting: a. uses drop of water god φ 960 horizontal continuity casting and rolling machine casting；B. lip reasonable cloth stream, the clearance control between lip and lower Casting Roller is 0.1～0.2mm；The most front case temperature is 690～710 DEG C, and front case aluminum water fluctuation of level scope control is at ± 0.5mm；D. the hard ears or side handles of a utensil are used；E. roll casting zone is 65mm～75mm；F. roll casting speed is 1050～1100mm/min, and g. is 6～7mm through 3 passage casting-rolling aluminum alloy coiled strips of continuous casting & rolling line；H. casting temperature 690～710 DEG C；3rd step is cold rolling: the irreversible rolled by cold rolling machine of a. IHI tetra-roller；B. roll-force is 300～600 tons；C. mill speed is 110～500m/min；D. uncoiling tension is 13～22MPa；E. coiling tension is 18～30MPa；F. through cold rolling 4 passage aluminium alloy coiled strip cold processing ratios be 80%～92%；4th step intermediate heat-treatment annealing；After 5th step annealing cold rolling: a. uses the IHI tetra-irreversible cold-rolling mill of roller；B. roll-force 100～200 tons；C. mill speed is 110～400m/min；D. uncoiling tension is 18～22MPa；E. coiling tension is 22～30MPa；F. through cold rolling 1 passage；6th step paper tinsel rolls: a. uses IHI tetra-roller irreversible foil mill paper tinsel to roll；B. roll-force is 90～200 tons；C. mill speed is 350～750m/min；D uncoiling tension is 3.5～7.5MPa；E. coiling tension is 3.5～5.0MPa；F. paper tinsel rolls 4 passages；7th step is cut: cutting speed is 500～700m/min, and uncoiling tension is 500N 900N；Coiling tension is 300N 700N；8th step: packaging.By the fine aluminium ingot through dispensing in the described first step, add a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loads in fusing stove, wherein the percentage by weight of composition is: Al >=99.35%, Si0.05～0.12%, Fe0.35～0.45%, Cu0.02～0.03%, Mn0.005%, Mg0.001%, Zn0.023%, Cr0.001%, Ti0.015%, Mg, Mn, Zn, Cr trace element is pressed the control standard of fine aluminium ingot and is controlled, and adds the most separately；In the 4th described step intermediate heat-treatment annealing, big volume aluminium alloy coiled strip blank is put into and is carried out perfect recrystallization annealing in heat-treatment furnace, and annealing temperature is 280～320 DEG C, and temperature retention time is 3～5 hours.
The invention has the beneficial effects as follows: method is simple, not only can improve aluminium foil mechanical property and improve plasticity, and the thinning aluminum foil thickness of energy, promote battery capacity.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the flow chart of the production method of a kind of lithium ion battery aluminium foil of the present invention.
Detailed description of the invention
Embodiment 1:
As a example by the lithium ion battery aluminium foil producing electronic bus battery, general thickness specification is: 0.02mm, and width specifications is according to Battery Plant's equipment choice 300～600mm unequal width.Refering to Fig. 1, the casting-rolling method of the lithium ion battery aluminium foil of this example, including following several steps: first step melting: 1. by the fine aluminium ingot through dispensing, add a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loads in fusing stove, wherein the percentage by weight of composition is: Al >=99.35%, Si:0.05%, Fe:0.35%, Cu:0.02%, Mn:0.005%, Mg:0.001%, Zn:0.023%, Cr:0.001%, Ti:0.015%, Mg, Mn, Zn, Cr trace element is pressed the control standard of fine aluminium ingot and is controlled, and adds the most separately.2. fusing: a. stirring melt for the first time；B. thermometric；C. second time stirring melt；D. preanalysis is sampled；E. composition adjustment；F. argon refine is used；G. skim；H. 20～30 points are stood；I. aluminium titanium boron wire fining agent, addition 1.4～2.1kg/t are added；J. extreme climate emergency processing；K. smelting temperature is 730～750 DEG C.3. holding temperature is 710～740 DEG C.4. using chlorine to add argon and carry out degasification, argon chlorine fraction is 20:1.5. use three well tubular filters to filter.Second step: casting, a. uses drop of water god φ 960 horizontal continuity casting and rolling machine casting；B. lip reasonable cloth stream, the clearance control between lip and lower Casting Roller is 0.1～0.2mm；The most front case temperature is 690～710 DEG C, and front case aluminum water fluctuation of level scope control is at ± 0.5mm；D. the hard ears or side handles of a utensil are used；E. roll casting zone is 65mm～75mm；F. roll casting speed is 1050～1100mm/min, and g. is 6～7mm through 3 passage casting-rolling aluminum alloy coiled strips of continuous casting & rolling line；H. casting temperature 690～710 DEG C.3rd step: cold rolling, the irreversible rolled by cold rolling machine of a. IHI tetra-roller；B. roll-force is 300～600 tons；C. mill speed is 110～500m/min；D. uncoiling tension is 13～22MPa；E. coiling tension is 18～30MPa；F. through cold rolling 4 passage aluminium alloy coiled strip cold processing ratios be 80%～92%.4th step: intermediate heat-treatment is annealed, carries out perfect recrystallization annealing in big volume aluminium alloy coiled strip blank threading heat-treatment furnace, and annealing temperature is 280 DEG C, and temperature retention time is 3 hours.5th step: cold rolling after annealing, a. uses the IHI tetra-irreversible cold-rolling mill of roller；B. roll-force 100～200 tons；C. mill speed is 110～400m/min；D. uncoiling tension is 18～22MPa；E. coiling tension is 22～30MPa；F. through cold rolling 1 passage.6th step: paper tinsel rolls, a. uses IHI tetra-roller irreversible foil mill paper tinsel to roll；B. roll-force is 90～200 tons；C. mill speed is 350～750m/min；D uncoiling tension is 3.5～7.5MPa；E. coiling tension is 3.5～5.0MPa；F. paper tinsel rolls 4 passages.7th step: cut, cutting speed is 500～700m/min, and uncoiling tension is 500N 900N；Coiling tension is 300N 700N.8th step: packaging.
Embodiment 2:
As a example by the lithium ion battery aluminium foil producing electronic bus battery, general thickness specification is: 0.02mm, and width specifications is according to Battery Plant's equipment choice 300～600mm unequal width.Refering to Fig. 1, a kind of casting-rolling method of the lithium ion battery aluminium foil of this example, including following several steps: the first step: melting, 1. by the fine aluminium ingot through dispensing, add a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loads in fusing stove, wherein the percentage by weight of composition is: Al >=99.35%, Si:0.09%, Fe:0.4%, Cu:0.025%, Mn:0.005%, Mg:0.001%, Zn:0.023%, Cr:0.001%, Ti:0.015%, Mg, Mn, Zn, Cr trace element is pressed the control standard of fine aluminium ingot and is controlled, and adds the most separately.2. fusing: a. stirring melt for the first time；B. thermometric；C. second time stirring melt；D. preanalysis is sampled；E. composition adjustment；F. argon refine is used；G. skim；H. 20～30 minutes are stood；I. aluminium titanium boron wire fining agent, addition 1.4～2.1kg/t are added；J. extreme climate emergency processing；K. smelting temperature is 730～750 DEG C.3. holding temperature is 710～740 DEG C.4. using chlorine to add argon and carry out degasification, argon chlorine fraction is 20:1.5. use three well tubular filters to filter.Second step: casting, a. uses drop of water god φ 960 horizontal continuity casting and rolling machine casting；B. lip reasonable cloth stream, the clearance control between lip and lower Casting Roller is 0.1～0.2mm；The most front case temperature is 690～710 DEG C, and front case aluminum water fluctuation of level scope control is at ± 0.5mm；D. the hard ears or side handles of a utensil are used；E. roll casting zone is 65mm～75mm；F. roll casting speed is 1050～1100mm/min；G. leading to 3 passage casting-rolling aluminum alloy coiled strips of continuous casting & rolling line is 6～6.5mm；H. casting temperature 690～710 DEG C.3rd step: cold rolling, a. uses the IHI tetra-irreversible rolled by cold rolling machine of roller；B. roll-force is 300～600 tons；C. mill speed is 110～500m/min；D. uncoiling tension is 13～22MPa；E. coiling tension is 18～30MPa；F. through cold rolling 4 passage aluminium alloy coiled strip cold processing ratios be 80%～92%.4th step: intermediate heat-treatment is annealed, carries out perfect recrystallization annealing in big volume aluminium alloy coiled strip blank threading heat-treatment furnace, and annealing temperature is 300 DEG C, and temperature retention time is 4 hours.5th step: cold rolling after annealing, the irreversible rolled by cold rolling machine of a. IHI tetra-roller；B. roll-force is 100～200 tons；C. mill speed is 110～400m/min；D. uncoiling tension is 18～22MPa；E. coiling tension is 22～30MPa.F. through cold rolling 1 passage.6th step: paper tinsel rolls, a. uses IHI tetra-roller irreversible foil mill paper tinsel to roll；B. roll-force is 90～200 tons；C. mill speed is 350～750m/min；D. uncoiling tension is 3.5～7.5MPa；E. coiling tension is 3.5～5.0MPa；F. paper tinsel rolls 4 passages.7th step: cut, cutting speed is 500～700m/min, and uncoiling tension is 500N 900N；Coiling tension is 300N 700N.8th step: packaging.
Embodiment 3:
As a example by the lithium ion battery aluminium foil producing electronic bus battery, general thickness specification is: 0.02mm, and width specifications is according to Battery Plant's equipment choice 300～600mm unequal width.Refering to Fig. 1, a kind of casting-rolling method of the lithium ion battery aluminium foil of this example, including following several steps: the first step: melting, 1. by the fine aluminium ingot through dispensing, add a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loads in fusing stove, wherein the percentage by weight of composition is: Al >=99.35%, Si:0.12%, Fe:0.45%, Cu:0.03%, Mn:0.005%, Mg:0.001%, Zn:0.023%, Cr:0.001%, Ti:0.015%, Mg, Mn, Zn, Cr trace element is pressed the control standard of fine aluminium ingot and is controlled, and adds the most separately.2. fusing: a. stirring melt for the first time；B. thermometric；C. second time stirring melt；D. preanalysis is sampled；E. composition adjustment；F. argon refine is used；G. skim；H. 20～30 points are stood；I. aluminium titanium boron wire fining agent, addition 1.4～2.1kg/t are added；J. extreme climate emergency processing；K. smelting temperature is 730～750 DEG C.3. holding temperature is 710～740 DEG C.4. using chlorine to add argon and carry out degasification, argon chlorine fraction is 20:1,5. filters with three well tubular filters.Second step: casting, a. uses drop of water god φ 960 horizontal continuity casting and rolling machine casting；B. lip reasonable cloth stream, the clearance control between lip and lower Casting Roller is 0.1～0.2mm；The most front case temperature is 690～710 DEG C, and front case aluminum water fluctuation of level scope control is at ± 0.5mm；D. the hard ears or side handles of a utensil are used；E. roll casting zone is 65mm～75mm；F. roll casting speed is 1050～1100mm/min；G. leading to 3 passage casting-rolling aluminum alloy coiled strips of continuous casting & rolling line is 6～6.5mm；H. casting temperature 690～710 DEG C.3rd step: cold rolling, the irreversible rolled by cold rolling machine of a. IHI tetra-roller；B roll-force is 300～600 tons；C. mill speed is 110～500m/min；D. uncoiling tension is 13～22MPa；E. coiling tension is 18～30MPa；F. through cold rolling 4 passage aluminium alloy coiled strip cold processing ratios be 80%～92%.4th step: intermediate heat-treatment is annealed, carries out perfect recrystallization annealing in big volume aluminium alloy coiled strip blank threading heat-treatment furnace, and annealing temperature is 320 DEG C, and temperature retention time is 5 hours.5th step: cold rolling after annealing, a. uses the IHI tetra-irreversible rolled by cold rolling machine of roller；B. roll-force is 100～200 tons；C. mill speed is 110～400m/min；D. uncoiling tension is 18～22MPa；E. coiling tension is 22～30MPa；F. through cold rolling 1 passage.6th step: paper tinsel rolls, a. uses IHI tetra-roller irreversible foil mill paper tinsel to roll；B. roll-force is 90～200 tons；C. mill speed is 350～750m/min；D. uncoiling tension is 3.5～7.5MPa；E. coiling tension is 3.5～5.0MPa；F. paper tinsel rolls 4 passages.7th step: cut, cutting speed is 500～700m/min, and uncoiling tension is 500N 900N；Coiling tension is 300N 700N.8th step: packaging.
Claims (1)
1. a production method for lithium ion battery aluminium foil, including following several steps: first step melting: 1. by the fine aluminium ingot through dispensing, adds in a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loading fusing stove, 2. fusing: a. stirring melt for the first time；B. thermometric；C. second time stirring melt；D. preanalysis is sampled；E. composition adjustment；F. argon refine is used；G. skim；H. 20～30 points are stood；I. aluminium titanium boron wire fining agent, addition 1.4～2.1kg/t are added；J. extreme climate emergency processing；K. smelting temperature is 730～750 DEG C, and 3. holding temperature is 710～740 DEG C, 4. uses chlorine to add argon and carries out degasification, and argon chlorine fraction is 20:1,5. uses three well tubular filters to filter；Second step casting: a. uses drop of water god φ 960 horizontal continuity casting and rolling machine casting；B. lip reasonable cloth stream, the clearance control between lip and lower Casting Roller is 0.1～0.2mm；The most front case temperature is 690～710 DEG C, and front case aluminum water fluctuation of level scope control is at ± 0.5mm；D. the hard ears or side handles of a utensil are used；E. roll casting zone is 65mm～75mm；F. roll casting speed is 1050～1100mm/min, and g. is 6～7mm through 3 passage casting-rolling aluminum alloy coiled strips of continuous casting & rolling line；H. casting temperature 690～710 DEG C；3rd step is cold rolling: the irreversible rolled by cold rolling machine of a. IHI tetra-roller；B. roll-force is 300～600 tons；C. mill speed is 110～500m/min；D. uncoiling tension is 13～22MPa；E. coiling tension is 18～30MPa；F. through cold rolling 4 passage aluminium alloy coiled strip cold processing ratios be 80%～92%；4th step intermediate heat-treatment annealing: cold rolling after the 5th step annealing: a. uses the IHI tetra-irreversible cold-rolling mill of roller；B. roll-force 100～200 tons；C. mill speed is 110～400m/min；D. uncoiling tension is 18～22MPa；E. coiling tension is 22～30MPa；F. through cold rolling 1 passage；6th step paper tinsel rolls: a. uses IHI tetra-roller irreversible foil mill paper tinsel to roll；B. roll-force is 90～200 tons；C. mill speed is 350～750m/min；D uncoiling tension is 3.5～7.5MPa；E. coiling tension is 3.5～5.0MPa；F. paper tinsel rolls 4 passages；7th step is cut: cutting speed is 500～700m/min, and uncoiling tension is 500N 900N；Coiling tension is 300N 700N；8th step packaging, it is characterized in that: by the fine aluminium ingot through dispensing in the described first step, add a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loads in fusing stove, wherein the percentage by weight of composition is: Al >=99.35%, Si0.05～0.12%, Fe0.35～0.45%, Cu0.02～0.03%, Mn0.005%, Mg0.001%, Zn0.023%, Cr0.001%, Ti0.015%, Mg, Mn, Zn, Cr trace element is pressed the control standard of fine aluminium ingot and is controlled, and adds the most separately；In the 4th described step intermediate heat-treatment annealing, big volume aluminium alloy coiled strip blank is put into and is carried out perfect recrystallization annealing in heat-treatment furnace, and annealing temperature is 280～320 DEG C, and temperature retention time is 3～5 hours.
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| CN105063520B (en) * | 2015-07-15 | 2018-05-11 | 浙江中金铝业有限公司 | A kind of annealing of aluminum foil for lithium battery |
| CN105063429B (en) * | 2015-07-15 | 2017-08-25 | 浙江中金铝业有限公司 | A kind of preparation method of aluminum foil for lithium battery |
| CN105921516B (en) * | 2016-05-05 | 2018-01-05 | 广东金兰新材料有限公司 | Aluminium foil suitable for lithium ion battery and preparation method thereof |
| CN105977494B (en) * | 2016-05-05 | 2018-12-04 | 广东金兰新材料有限公司 | Aluminium foil and preparation method thereof suitable for lithium ion battery |
| CN106676442A (en) * | 2016-12-12 | 2017-05-17 | 广西大学 | Heat treating and machining method for aluminum alloy plates |
| CN108630944A (en) * | 2017-03-24 | 2018-10-09 | 银隆新能源股份有限公司 | A kind of preparation method of lithium-ion-power cell aluminum foil current collector |
| WO2019101723A1 (en) * | 2017-11-21 | 2019-05-31 | Hydro Aluminium Rolled Products Gmbh | Battery electrode foil for the production of lithium-ion accumulators |
| CN110205524A (en) * | 2019-06-26 | 2019-09-06 | 江苏鼎胜新能源材料股份有限公司 | A kind of high extension power battery aluminium foil and preparation method thereof |
| CN111893351B (en) * | 2020-08-11 | 2021-12-10 | 华北铝业有限公司 | Aluminum foil for 1235D lithium battery and preparation method thereof |
| CN112893464A (en) * | 2021-01-13 | 2021-06-04 | 安徽力幕新材料科技有限公司 | Processing method of aluminum foil for power battery |
| CN114405999B (en) * | 2021-12-16 | 2022-11-25 | 安徽中基电池箔科技有限公司 | Production process of 1060 alloy battery aluminum foil with high elongation |
| 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 |
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