CN104388766A - 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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- CN104388766A CN104388766A CN201410695087.9A CN201410695087A CN104388766A CN 104388766 A CN104388766 A CN 104388766A CN 201410695087 A CN201410695087 A CN 201410695087A CN 104388766 A CN104388766 A CN 104388766A
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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, especially a kind of production method of lithium ion battery aluminium foil.
Background technology
At present, the aluminium foil of the lithium ion battery that market is sold, tensile strength and unit elongation index low, material plasticity is poor, backfin problem of Cracking is easily there is in the coating used in lower operation, nipping process, having a negative impact work-ing life to lifting battery electric quantity and product, is also one of bottleneck that govern lithium-ion-power cell industry development.
Summary of the invention
The technical problem of solution required for the present invention is to provide a kind of production method of lithium ion battery aluminium foil, improves lithium ion battery aluminium foil tensile strength and unit elongation index, and meanwhile, thinning aluminum foil thickness, promotes cell container.
The technical solution adopted for the present invention to solve the technical problems is: comprise following several step: the first step: melting; Second step: casting; 3rd step: cold rolling; 4th step: intermediate heat treatment is annealed; 5th step: cold rolling after annealing; 6th step: paper tinsel rolls; 7th step: cut; 8th step: packaging.By the fine aluminium ingot through batching in the described the first step, add in a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loading smelting furnace, wherein the weight percent 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%, the control criterion that the trace element such as Mg, Mn, Zn, Cr presses fine aluminium ingot controls, and does not add separately; In the 4th described step intermediate heat treatment annealing, large volume aluminium alloy coiled strip blank is put in heat treatment furnace and is carried out perfect recrystallization annealing (O state) process, and annealing temperature is 280 ~ 320 DEG C, and soaking 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 cell container.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the schema of the production method of a kind of lithium ion battery aluminium foil of the present invention.
Embodiment
Embodiment 1:
To produce the lithium ion battery aluminium foil of electronic bus battery, general thickness specification is: 0.02mm, and width specifications does not wait width according to Battery Plant equipment choice 300 ~ 600mm.Consult Fig. 1, the casting-rolling method of the lithium ion battery aluminium foil of this example, comprise following several step: the first step melting: 1. by the fine aluminium ingot through batching, add in a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loading smelting furnace, wherein the weight percent 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%, the control criterion that the trace element such as Mg, Mn, Zn, Cr presses fine aluminium ingot controls, and does not add separately.2. melt: a. first time stirs melt; B. thermometric; C. second time stirs melt; D. preanalysis is sampled; E. composition adjustment; F. argon gas refining is adopted; G. skim; H. 20 ~ 30 points are left standstill; I. aluminium titanium boron wire fining agent is added, addition 1.4 ~ 2.1kg/t; J. extreme climate emergency processing; K. smelting temperature is 730 ~ 750 DEG C.3. holding temperature is 710 ~ 740 DEG C.4. adopt chlorine to add argon gas and carry out degasification, argon gas chlorine fraction is 20:1.5. adopt Mitsui pipe filter to filter.Second step: casting, a. adopts the casting of drop of water god ￠ 960 horizontal continuity casting and rolling machine; B. the reasonable cloth stream of lip, the clearance control between lip and lower Casting Roller is at 0.1 ~ 0.2mm; C. front case temperature is 690 ~ 710 DEG C, and front case aluminium 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 be 1050 ~ 1100mm/min, g. through continuous casting & rolling line 3 passage casting-rolling aluminum alloy coiled strips be 6 ~ 7mm; H. casting temperature 690 ~ 710 DEG C.3rd step: cold rolling, the irreversible rolled by cold rolling machine of a. Bian IHI tetra-roller; B. rolling load is 300 ~ 600 tons; C. roll 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, large volume aluminium alloy coiled strip blank is put in heat treatment furnace and is carried out perfect recrystallization annealing (O state) process, and annealing temperature is 280 DEG C, and soaking time is 3 hours.5th step: cold rolling after annealing, a. adopts the irreversible cold-rolling mill of IHI tetra-roller; B. rolling load 100 ~ 200 tons; C. roll 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. adopts the irreversible foil mill paper tinsel of IHI tetra-roller to roll; B. rolling load is 90 ~ 200 tons; C. roll 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, the speed of cutting is 500 ~ 700m/min, and uncoiling tension is 500N-900N; Coiling tension is 300N-700N.8th step: packaging.
Embodiment 2:
To produce the lithium ion battery aluminium foil of electronic bus battery, general thickness specification is: 0.02mm, and width specifications does not wait width according to Battery Plant equipment choice 300 ~ 600mm.Consult Fig. 1, the casting-rolling method of a kind of lithium ion battery aluminium foil of this example, comprise following several step: the first step: melting, 1. by the fine aluminium ingot through batching, add in a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loading smelting furnace, wherein the weight percent 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%, the control criterion that the trace element such as Mg, Mn, Zn, Cr presses fine aluminium ingot controls, and does not add separately.2. melt: a. first time stirs melt; B. thermometric; C. second time stirs melt; D. preanalysis is sampled; E. composition adjustment; F. argon gas refining is adopted; G. skim; H. 20 ~ 30 minutes are left standstill; I. aluminium titanium boron wire fining agent is added, addition 1.4 ~ 2.1kg/t; J. extreme climate emergency processing; K. smelting temperature is 730 ~ 750 DEG C.3. holding temperature is 710 ~ 740 DEG C.4. adopt chlorine to add argon gas and carry out degasification, argon gas chlorine fraction is 20:1.5. adopt Mitsui pipe filter to filter.Second step: casting, a. adopts the casting of drop of water god ￠ 960 horizontal continuity casting and rolling machine; B. the reasonable cloth stream of lip, the clearance control between lip and lower Casting Roller is at 0.1 ~ 0.2mm; C. front case temperature is 690 ~ 710 DEG C, and front case aluminium 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. logical continuous casting & rolling line 3 passage casting-rolling aluminum alloy coiled strips are 6 ~ 6.5mm; H. casting temperature 690 ~ 710 DEG C.3rd step: cold rolling, a. adopts the irreversible rolled by cold rolling machine of IHI tetra-roller; B. rolling load is 300 ~ 600 tons; C. roll 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, large volume aluminium alloy coiled strip blank is put in heat treatment furnace and is carried out perfect recrystallization annealing (O state) process, and annealing temperature is 300 DEG C, and soaking time is 4 hours.5th step: cold rolling after annealing, the irreversible rolled by cold rolling machine of a. Bian IHI tetra-roller; B. rolling load is 100 ~ 200 tons; C. roll 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. adopts the irreversible foil mill paper tinsel of IHI tetra-roller to roll; B. rolling load is 90 ~ 200 tons; C. roll 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, the speed of cutting is 500 ~ 700m/min, and uncoiling tension is 500N-900N; Coiling tension is 300N-700N.8th step: packaging.
Embodiment 3:
To produce the lithium ion battery aluminium foil of electronic bus battery, general thickness specification is: 0.02mm, and width specifications does not wait width according to Battery Plant equipment choice 300 ~ 600mm.Consult Fig. 1, the casting-rolling method of a kind of lithium ion battery aluminium foil of this example, comprise following several step: the first step: melting, 1. by the fine aluminium ingot through batching, add in a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loading smelting furnace, wherein the weight percent 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%, the control criterion that the trace element such as Mg, Mn, Zn, Cr presses fine aluminium ingot controls, and does not add separately.2. melt: a. first time stirs melt; B. thermometric; C. second time stirs melt; D. preanalysis is sampled; E. composition adjustment; F. argon gas refining is adopted; G. skim; H. 20 ~ 30 points are left standstill; I. aluminium titanium boron wire fining agent is added, addition 1.4 ~ 2.1kg/t; J. extreme climate emergency processing; K. smelting temperature is 730 ~ 750 DEG C.3. holding temperature is 710 ~ 740 DEG C.4. adopt chlorine to add argon gas and carry out degasification, argon gas chlorine fraction is 20:1, and 5. Bian Mitsui pipe filter filters.Second step: casting, a. adopts the casting of drop of water god ￠ 960 horizontal continuity casting and rolling machine; B. the reasonable cloth stream of lip, the clearance control between lip and lower Casting Roller is at 0.1 ~ 0.2mm; C. front case temperature is 690 ~ 710 DEG C, and front case aluminium 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. logical continuous casting & rolling line 3 passage casting-rolling aluminum alloy coiled strips are 6 ~ 6.5mm; H. casting temperature 690 ~ 710 DEG C.3rd step: cold rolling, the irreversible rolled by cold rolling machine of a. Bian IHI tetra-roller; B rolling load is 300 ~ 600 tons; C. roll 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, large volume aluminium alloy coiled strip blank is put in heat treatment furnace and is carried out perfect recrystallization annealing (O state) process, and annealing temperature is 320 DEG C, and soaking time is 5 hours.5th step: cold rolling after annealing, a. adopts the irreversible rolled by cold rolling machine of IHI tetra-roller; B. rolling load is 100 ~ 200 tons; C. roll 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. adopts the irreversible foil mill paper tinsel of IHI tetra-roller to roll; B. rolling load is 90 ~ 200 tons; C. roll 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, the speed of cutting 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, comprises following several step: the first step: melting; Second step: casting; 3rd step: cold rolling; 4th step: intermediate heat treatment is annealed; 5th step: cold rolling after annealing; 6th step: paper tinsel rolls; 7th step: cut; 8th step: packaging, it is characterized in that: by the fine aluminium ingot through batching in the described the first step, add in a small amount of aluminium alloy scrap, Fe, Si, Cu intermediate alloy ingot loading smelting furnace, wherein the weight percent 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%, the control criterion that the trace element such as Mg, Mn, Zn, Cr presses fine aluminium ingot controls, and does not add separately; In the 4th described step intermediate heat treatment annealing, large volume aluminium alloy coiled strip blank is put in heat treatment furnace and is carried out perfect recrystallization annealing (O state) process, and annealing temperature is 280 ~ 320 DEG C, and soaking time is 3 ~ 5 hours.
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Cited By (12)
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| CN105063520A (en) * | 2015-07-15 | 2015-11-18 | 浙江中金铝业有限公司 | Annealing treatment on aluminum foil for lithium batteries |
| CN105063429A (en) * | 2015-07-15 | 2015-11-18 | 浙江中金铝业有限公司 | Method for preparing aluminum foil for lithium battery |
| CN105921516A (en) * | 2016-05-05 | 2016-09-07 | 广东金兰新材料有限公司 | Aluminum foil suitable for lithium ion battery and preparation method thereof |
| CN105977494A (en) * | 2016-05-05 | 2016-09-28 | 广东金兰新材料有限公司 | Aluminum foil applicable to lithium ion battery and preparation method for aluminum foil |
| 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 |
| 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 |
| CN111601904A (en) * | 2017-11-21 | 2020-08-28 | 海德鲁铝业钢材有限公司 | Electrode foil for producing battery of lithium ion accumulator |
| CN111893351A (en) * | 2020-08-11 | 2020-11-06 | 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 |
| CN114405999A (en) * | 2021-12-16 | 2022-04-29 | 安徽中基电池箔科技有限公司 | Production process of high-elongation 1060 alloy battery aluminum foil |
| 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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| 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 |
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| 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 |
| 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 |
| CN111601904A (en) * | 2017-11-21 | 2020-08-28 | 海德鲁铝业钢材有限公司 | Electrode foil for producing battery of lithium ion accumulator |
| 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 |
| CN111893351A (en) * | 2020-08-11 | 2020-11-06 | 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 |
| CN114405999A (en) * | 2021-12-16 | 2022-04-29 | 安徽中基电池箔科技有限公司 | Production process of high-elongation 1060 alloy battery aluminum foil |
| 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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