CN106636775A - Aluminum alloy strip used for powder battery shell and preparation method of aluminum alloy strip - Google Patents

Aluminum alloy strip used for powder battery shell and preparation method of aluminum alloy strip Download PDF

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Publication number
CN106636775A
CN106636775A CN201611180263.0A CN201611180263A CN106636775A CN 106636775 A CN106636775 A CN 106636775A CN 201611180263 A CN201611180263 A CN 201611180263A CN 106636775 A CN106636775 A CN 106636775A
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China
Prior art keywords
aluminium alloy
aluminum alloy
alloy strip
alloy strips
electrokinetic cell
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Pending
Application number
CN201611180263.0A
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Chinese (zh)
Inventor
阙石生
黄瑞银
廖明顺
罗筱雄
吴建新
徐始祥
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Chinalco Ruimin Co Ltd
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Chinalco Ruimin Co Ltd
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Priority to CN201611180263.0A priority Critical patent/CN106636775A/en
Publication of CN106636775A publication Critical patent/CN106636775A/en
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention belongs to the field of aluminum alloy strip manufacturing, and particularly relates to an aluminum alloy strip used for a power battery shell and a preparation method of the aluminum alloy strip. The aluminum alloy strip is composed of, by weight, 0.2-0.3% of Si, 0.4-0.6% of Fe, 0.06-0.12% of Cu, 1.05-1.15% of Mn, smaller than 0.05% of Mg, 0.01-0.03% of Ti, and the balance Al, wherein the ration of Fe to Si is 2-3. Conversion from an Al6(Fe,Mn) phase to an alpha-Al(Fe,Mn)Si phase is controlled through chemical component optimization design and homogenization heat treatment, diffusate can be conveniently separated out through a certain temperature fall rate, and meanwhile, a compound is crushed and refined by increasing the machining rates of all passes of hot rolling and total passes; and excellent matching of material strength, plasticity and deep drawability is finally achieved, and the preparation method is economical and easy to popularize.

Description

A kind of electrokinetic cell shell aluminium alloy strips and preparation method thereof
Technical field
The invention belongs to the preparation field of aluminium alloy strips, and in particular to a kind of electrokinetic cell shell aluminium alloy strips and its Preparation method.
Background technology
The punching process deflection of electrokinetic cell shell is big, punching passage is more, production process is complicated, the combination property to material Particularly deep drawability, laser weldability propose very high request, do not require nothing more than material and have little thickness deviation, good Surface quality, while also needing to the low and excellent laser weldability of good plasticity, little yield tensile ratio, earing rate to protect Security during demonstrate,proving battery under arms.At present to there is poor deep drawability, earing rate height and laser welding bad etc. for the material Defect.
The present invention carries out optimizing components design to aluminium alloy strips, based on the control of the aspects such as texture, compound and crystal grain Technical research processed, realizes the good fitting of the strength of materials, plasticity and deep drawability so that the aluminium alloy strips can meet well Deep drawability, can realize good laser welding with cover plate again, be preparation method that is a kind of not only economic but also easily promoting.
By homogenizing Heat Treatment Control Al6The transformation of (Fe, Mn) opposite α-Al (Fe, Mn) Si phases, and necessarily to lower the temperature The precipitation of speed control dispersion so that tissue is separated out fully, is evenly distributed;Increase the processing of each passage of hot rolling and total passage Rate, is conducive to the broken of compound;By hot rolling finishing temperature and thickness, cold processing ratio, finished products technology controlling and process, make Obtain material cubic texture to be balanced with deformation texture.The good fitting of the strength of materials, plasticity and deep drawability is finally realized, is made Obtaining the aluminium alloy strips can meet good deep drawability, can realize good laser welding with cover plate again, be a kind of both Jing The preparation method that Ji is easily promoted again.
The content of the invention
Present invention aims to the existing material is present, deep drawability is poor, earing rate is high and laser welding is bad etc. A kind of defect, there is provided electrokinetic cell shell aluminium alloy strips and preparation method thereof.Aluminium alloy strips obtained by the present invention can Meet good deep drawability, can realize good laser welding with cover plate again, be preparation that is a kind of not only economic but also easily promoting Method.
To realize the purpose of the present invention, adopt the following technical scheme that:
A kind of electrokinetic cell shell aluminium alloy strips, its constituent is:0.2 ~ 0.3wt% of Si, Fe 0.4 ~ 0.6wt%, Cu 1.05 ~ 1.15wt% of 0.06 ~ 0.12wt%, Mn, Mg < 0.05wt%, 0.01 ~ 0.03wt% of Ti, Fe/Si=2 ~ 3, balance of Al.
A kind of method for preparing electrokinetic cell shell aluminium alloy strips as above, concretely comprises the following steps:
(1)By the composition of aluminium alloy strips, by aluminium alloy stock is smelting, refining, degasification is later half is continuously cast into for online slagging-off Aluminium alloy flat bloom;
(2)Slab ingot jagsaw is cut, behind milling face, 580 ~ 620 DEG C and the homogenization heat treatment for being incubated 4 ~ 10 hours are carried out, then with 20 DEG C/h speed be cooled to 510 DEG C of hot rolling start rolling temperature;
(3)Then come out of the stove hot rolling, 3.0 ~ 8.0mm of hot rolled thickness, 320 ~ 360 DEG C of hot rolling finishing temperature;
(4)Hot rolled plate is rolled to into finished product thickness on cold-rolling mill, while ensureing more than cold processing ratio >=65%;
(5)By Jing steps(4)The material of process is cleaned, aligning, trimming;
(6)By Jing steps(5)Band after process is placed on annealing furnace and carries out finished products, 340 ~ 400 DEG C of annealing temperature, during insulation Between according to volume weight depending on, be finally made a kind of electrokinetic cell shell aluminium alloy strips.
The present invention has compared with the prior art advantages below:
1)The tensile strength of the aluminium alloy strips obtained by the present invention reaches 100 ~ 120MPa, and yield strength reaches 40 ~ 60MPa, Earing rate < 3%;Good deep drawability can be met, good laser welding can be realized with cover plate again;
2)The present invention carries out optimizing components design on the basis of 3003 alloys to aluminium alloy strips, by controlling Fe/Si ratios With homogenization Heat Treatment Control Al6The transformation of (Fe, Mn) opposite α-Al (Fe, Mn) Si phases, and controlled more with certain rate of temperature fall The precipitation of scattered thing so that tissue is separated out fully, is evenly distributed;Increase the working modulus of each passage of hot rolling and total passage, being conducive to Compound it is broken;By hot rolling finishing temperature and thickness, cold processing ratio, finished products technology controlling and process so that cubic texture It is balanced with deformation texture.Finally realize the good fitting of the strength of materials, plasticity and deep drawability so that the aluminium alloy strips Good deep drawability can be met, good laser welding can be realized with cover plate again, be a kind of not only economical but also easily popularization Preparation method.
The preparation method of traditional aluminium alloy strips, is first annealing trimming of carry out afterwards, and so trimming is held after the annealing of O states Easy alice, trimming quality is bad.And the present invention is using first cleaning, aligning, trimming after cold rolling, after annealing, the technological operation is avoided Trimming quality bad problem.
Specific embodiment
For the further open rather than restriction present invention, below in conjunction with example, the present invention is described in further detail.
Embodiment 1
A kind of electrokinetic cell shell aluminium alloy strips, its constituent is:Si 0.2wt%, Fe 0.4wt%, Cu 0.06wt%, Mn 1.05wt%, Mg 0.02wt%, Ti 0.01wt%, Fe/Si=2, balance of Al.
A kind of method for preparing electrokinetic cell shell aluminium alloy strips as above, concretely comprises the following steps:
(1)By the composition of aluminium alloy strips, by aluminium alloy stock is smelting, refining, degasification is later half is continuously cast into for online slagging-off Aluminium alloy flat bloom;
(2)Slab ingot jagsaw is cut, behind milling face, 580 DEG C and the homogenization heat treatment for being incubated 4 hours are carried out, then with 20 DEG C/h Speed is cooled to 510 DEG C of hot rolling start rolling temperature;
(3)Then come out of the stove hot rolling, hot rolled thickness 3.0mm, 320 DEG C of hot rolling finishing temperature;
(4)Hot rolled plate is rolled to into finished product thickness 1.0mm on cold-rolling mill;
(5)By Jing steps(4)The material of process is cleaned, aligning, trimming;
(6)By Jing steps(5)Band after process is placed on annealing furnace and carries out finished products, 340 DEG C of annealing temperature, temperature retention time root Depending on according to volume weight, a kind of electrokinetic cell shell aluminium alloy strips are finally made.
The tensile strength of aluminium alloy strips obtained in Jing the method is 100MPa, and yield strength reaches 60MPa, and earing rate is 2.5%。
Embodiment 2
A kind of electrokinetic cell shell aluminium alloy strips, its constituent is:Si 0.2wt%, Fe 0.5wt%, Cu 0.10wt%, Mn 1.10wt%, Mg 0.04wt%, Ti 0.02wt%, Fe/Si=2.5, balance of Al.
A kind of method for preparing electrokinetic cell shell aluminium alloy strips as above, concretely comprises the following steps:
(1)By the composition of aluminium alloy strips, by aluminium alloy stock is smelting, refining, degasification is later half is continuously cast into for online slagging-off Aluminium alloy flat bloom;
(2)Slab ingot jagsaw is cut, behind milling face, 600 DEG C and the homogenization heat treatment for being incubated 8 hours are carried out, then with 20 DEG C/h Speed is cooled to 510 DEG C of hot rolling start rolling temperature;
(3)Then come out of the stove hot rolling, hot rolled thickness 5.0mm, 340 DEG C of hot rolling finishing temperature;
(4)Hot rolled plate is rolled to into finished product thickness 1.5mm on cold-rolling mill;
(5)By Jing steps(4)The material of process is cleaned, aligning, trimming;
(6)By Jing steps(5)Band after process is placed on annealing furnace and carries out finished products, 380 DEG C of annealing temperature, temperature retention time root Depending on according to volume weight, a kind of electrokinetic cell shell aluminium alloy strips are finally made.
The tensile strength of aluminium alloy strips obtained in Jing the method is 110MPa, and yield strength reaches 50MPa, and earing rate is 1.5%。
Embodiment 3
A kind of electrokinetic cell shell aluminium alloy strips, its constituent is:Si 0.2wt%, Fe 0.6wt%, Cu 0.12wt%, Mn 1.15wt%, Mg 0.01wt%, Ti 0.03wt%, Fe/Si=3, balance of Al.
A kind of method for preparing electrokinetic cell shell aluminium alloy strips as above, concretely comprises the following steps:
(1)By the composition of aluminium alloy strips, by aluminium alloy stock is smelting, refining, degasification is later half is continuously cast into for online slagging-off Aluminium alloy flat bloom;
(2)Slab ingot jagsaw is cut, behind milling face, 620 DEG C and the homogenization heat treatment for being incubated 10 hours are carried out, then with 20 DEG C/h Speed be cooled to 510 DEG C of hot rolling start rolling temperature;
(3)Then come out of the stove hot rolling, hot rolled thickness 8.0mm, 360 DEG C of hot rolling finishing temperature;
(4)Hot rolled plate is rolled to into finished product thickness 2.0mm on cold-rolling mill;
(5)By Jing steps(4)The material of process is cleaned, aligning, trimming;
(6)By Jing steps(5)Band after process is placed on annealing furnace and carries out finished products, 400 DEG C of annealing temperature, temperature retention time root Depending on according to volume weight, a kind of electrokinetic cell shell aluminium alloy strips are finally made.
The tensile strength of aluminium alloy strips obtained in Jing the method is 120MPa, and yield strength reaches 40MPa, and earing rate is 1.0%。
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with Modification, should all belong to the covering scope of the present invention.

Claims (2)

1. a kind of electrokinetic cell shell aluminium alloy strips, it is characterised in that:Its constituent is:0.2 ~ 0.3wt% of Si, Fe 0.4 1.05 ~ 1.15wt% of 0.06 ~ 0.12wt% of ~ 0.6wt%, Cu, Mn, Mg < 0.05wt%, 0.01 ~ 0.03wt% of Ti, Fe/Si=2 ~ 3, balance of Al.
2. a kind of method for preparing electrokinetic cell shell aluminium alloy strips as claimed in claim 1, it is characterised in that:Concrete step Suddenly it is:
(1)By the composition of aluminium alloy strips, by aluminium alloy stock is smelting, refining, degasification is later half is continuously cast into for online slagging-off Aluminium alloy flat bloom;
(2)Slab ingot jagsaw is cut, behind milling face, 580 ~ 620 DEG C and the homogenization heat treatment for being incubated 4 ~ 10 hours are carried out, then with 20 DEG C/h speed be cooled to 510 DEG C of hot rolling start rolling temperature;
(3)Then come out of the stove hot rolling, 3.0 ~ 8.0mm of hot rolled thickness, 320 ~ 360 DEG C of hot rolling finishing temperature;
(4)Hot rolled plate is rolled to into finished product thickness on cold-rolling mill, while ensureing more than cold processing ratio >=65%;
(5)By Jing steps(4)The material of process is cleaned, aligning, trimming;
(6)By Jing steps(5)Band after process is placed on annealing furnace and carries out finished products, 340 ~ 400 DEG C of annealing temperature, during insulation Between according to volume weight depending on, be finally made a kind of electrokinetic cell shell aluminium alloy strips.
CN201611180263.0A 2016-12-20 2016-12-20 Aluminum alloy strip used for powder battery shell and preparation method of aluminum alloy strip Pending CN106636775A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107130146A (en) * 2017-06-07 2017-09-05 中铝瑞闽股份有限公司 A kind of capacitor case aluminium alloy strips and preparation method thereof
CN107502787A (en) * 2017-08-15 2017-12-22 中铝瑞闽股份有限公司 A kind of new energy battery cover explosion-proof valve aluminium alloy strips and preparation method thereof
CN107604212A (en) * 2017-09-12 2018-01-19 中铝瑞闽股份有限公司 Integrated battery cover board aluminium alloy strips and preparation method thereof
CN108559878A (en) * 2018-03-08 2018-09-21 常州常发制冷科技有限公司 Battery case aluminum alloy strip and preparation method thereof
CN108998701A (en) * 2018-08-09 2018-12-14 广西柳州银海铝业股份有限公司 IH electric cooker lid aluminum alloy base material production method
CN109097636A (en) * 2018-09-10 2018-12-28 招商局铝业(重庆)有限公司 A kind of baking utensil aluminium alloy and preparation method thereof
CN109097637A (en) * 2018-09-10 2018-12-28 招商局铝业(重庆)有限公司 The preparation method of one bulb kettle type pot gallbladder aluminum alloy materials
CN109487132A (en) * 2018-12-20 2019-03-19 广西柳州银海铝业股份有限公司 Power battery shell aluminium alloy strips and its manufacturing method
CN110453110A (en) * 2019-09-03 2019-11-15 南通恒金复合材料有限公司 A kind of housing of power cell aluminium alloy strips and preparation method thereof
CN111647775A (en) * 2020-05-08 2020-09-11 银邦金属复合材料股份有限公司 New energy power battery case, aluminum alloy and manufacturing method thereof

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CN105695821A (en) * 2016-02-05 2016-06-22 中铝瑞闽股份有限公司 High-strength aluminium alloy strip for anodic oxidation, and preparation method thereof
CN106086532A (en) * 2016-06-20 2016-11-09 中铝瑞闽股份有限公司 A kind of capacitor case aluminium alloy strips and preparation method thereof
CN106119615A (en) * 2016-08-17 2016-11-16 中铝瑞闽股份有限公司 A kind of new energy resource power battery shell aluminium alloy strips and preparation method thereof

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107130146A (en) * 2017-06-07 2017-09-05 中铝瑞闽股份有限公司 A kind of capacitor case aluminium alloy strips and preparation method thereof
CN107502787A (en) * 2017-08-15 2017-12-22 中铝瑞闽股份有限公司 A kind of new energy battery cover explosion-proof valve aluminium alloy strips and preparation method thereof
CN107502787B (en) * 2017-08-15 2019-02-22 中铝瑞闽股份有限公司 A kind of new energy battery cover explosion-proof valve aluminium alloy strips and preparation method thereof
CN107604212A (en) * 2017-09-12 2018-01-19 中铝瑞闽股份有限公司 Integrated battery cover board aluminium alloy strips and preparation method thereof
CN108559878A (en) * 2018-03-08 2018-09-21 常州常发制冷科技有限公司 Battery case aluminum alloy strip and preparation method thereof
CN108998701A (en) * 2018-08-09 2018-12-14 广西柳州银海铝业股份有限公司 IH electric cooker lid aluminum alloy base material production method
CN109097636A (en) * 2018-09-10 2018-12-28 招商局铝业(重庆)有限公司 A kind of baking utensil aluminium alloy and preparation method thereof
CN109097637A (en) * 2018-09-10 2018-12-28 招商局铝业(重庆)有限公司 The preparation method of one bulb kettle type pot gallbladder aluminum alloy materials
CN109487132A (en) * 2018-12-20 2019-03-19 广西柳州银海铝业股份有限公司 Power battery shell aluminium alloy strips and its manufacturing method
CN110453110A (en) * 2019-09-03 2019-11-15 南通恒金复合材料有限公司 A kind of housing of power cell aluminium alloy strips and preparation method thereof
CN111647775A (en) * 2020-05-08 2020-09-11 银邦金属复合材料股份有限公司 New energy power battery case, aluminum alloy and manufacturing method thereof

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Application publication date: 20170510