CN104711448A - Copper alloy foil for power battery carrying fluid and processing method thereof - Google Patents
Copper alloy foil for power battery carrying fluid and processing method thereof Download PDFInfo
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- CN104711448A CN104711448A CN201310684237.1A CN201310684237A CN104711448A CN 104711448 A CN104711448 A CN 104711448A CN 201310684237 A CN201310684237 A CN 201310684237A CN 104711448 A CN104711448 A CN 104711448A
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Abstract
The invention relates to a copper alloy foil for a power battery carrying fluid and a processing method thereof. The cooper alloy foil comprises the following ingredients, by weight, 0.001-0.01% of Cr, 0.001-0.005% of Ag, 0.001-0.005% of Ti, 0.001-0.003% of Zr, 0.001-0.003% of Co, 0.001-0.003% of Si and the balance Cu. The ingredients satisfy the following conditions: (a) Cu + Cr + Zr + Co is greater than or equal to 99.975%; (b) Cr + Co is less than or equal to 0.012% and greater than or equal to 0.003%; and (c) Cr/Ag is less than or equal to 8 and greater than or equal to 2. Tensile strength sigma b of the cooper alloy foil for the power battery carrying fluid can reach 450-520 MPa, plastic elongation delta is 0.5-5%, and conductivity is 90-95% IACS. The cooper alloy foil has advantages of high strength, high fatigue performance, good hydrophilicity, good heat resistance and good conductivity, and can completely replace an existing pure copper-type electrolysis and rolled cooper foil for a power battery carrying fluid.
Description
Technical field
The invention belongs to non-ferrous metals processing field, relate to a kind of power cell carrying object copper alloy foil and working method thereof of excellent performance.It is mainly adapted to manufacture battery cathode carrying object, also can be used for printed wiring, the high performance precision component in the fields such as instrument, instrument and communication.
Background technology
1859 french chemist Prandtl (Gaston Plante) invented chargeable lead-acid cell, within 1881, be successfully applied on the first in the world electro-tricycle, but because of the limitation of lead-acid cell stored energy aspect, failure in electromobile at the beginning of last century and fuel-engined vehicle are competed.At present, energy dilemma and day by day serious environmental pollution make automotive engineering just experiencing the change of the important technical such as fuel diversification, power current gasification.The electromobile with energy-efficient, low emission or zero release advantage has regained life, and is subject to the extensive attention of countries in the world.
The data of " BP world energy sources statistics " show, with current recovery rate, Global Oil reserves can for production 40 years, and coal can with 160 years, and for the country of the few oil of the such coal more than of China, the application of motive force of development battery new energy is imperative.In addition, China is second largest CO in the world at present
2discharge state, is faced with increasing carbon emission reduction pressure.From the statistic data of OICA, motor vehicle exhaust occupies CO
216% of total emission volumn, therefore, promotes the use of clean energy vehicle, is an imperative major action.Development adopts the electromobile of power cell to have very positive social effect, and it not only can reduce the degree of dependence of oil, reduces CO
2quantity discharged, slow down Global Greenhouse Effect, and excellent battery performance contributes to the overall performance improving automobile.
Power cell is primarily of positive plate, barrier film and negative plate composition, and wherein as the general aluminium of plus plate current-collecting body body material and aluminium alloy foil material, and Copper and its alloy foil selected by negative current collector body material.Copper Foil had both served as the carrier of negative electrode active material in power cell, and serve as again the collection of negative electricity subflow and transmission body, therefore, the chemical property of copper foil current collector to lithium ion battery has a great impact.At present, power battery cathode collector copper alloy foil is generally divided into rolled copper foil and electrolytic copper foil two kinds, at present be purple (pure) Copper Foil.Rolled copper foil is made owing to being through stressed calendering, intermolecular densification, and physical strength is good, and surfaceness is low, but manufacturing cost is high, and homogeneity and thermostability are slightly poor; Electrolytic copper foil is intermolecular loose, and physical strength and ductility are slightly poor, homogeneity, electroconductibility and Heat stability is good.But due in actual use at present, the poor mechanical property of purple (pure) Copper Foil, to the poor adhesive force of coat, whole synthesis poor performance.
Therefore, provide a kind of in mechanical property, the power cell carrying object copper alloy foil be all improved sticking power and the whole synthesis aspect of performance of coat and working method thereof just become the technical barrier that this technical field is badly in need of solving.
Summary of the invention
An object of the present invention is to provide a kind of in mechanical property, to the power cell carrying object copper alloy foil that sticking power and the whole synthesis aspect of performance of coat are all improved.
For achieving the above object, the present invention takes following technical scheme:
A kind of power cell carrying object copper alloy foil, according to mass percent, its composition comprises: Cr0.001% ~ 0.01%, Ag0.001% ~ 0.005%, Ti0.001% ~ 0.005%, Zr0.001% ~ 0.003%, Co0.001% ~ 0.003%, Si0.001% ~ 0.003%, all the other are Cu.
A kind of optimal technical scheme, is characterized in that: described composition meets following condition: (a) Cu+Cr+Zr+Co >=99.975%; (b) 0.003%≤Cr+Co≤0.012%; C () 2≤Cr/Ag≤8, are preferably 2≤Cr/Ag≤5.
The effect of institute's Addition ofelements:
Cr(chromium): the mechanical property increasing alloy, improves the surface-coated ability of foil.
Ag(silver): trace silver reduces electroconductibility and the thermal conductivity of copper hardly, but can significantly improve recrystallization temperature and creep strength, and (chromium/silver) is than when being in preferred version, and alloy has good specific conductivity and intensity.
Ti(titanium): trace amount of titanium can play the effect of crystal grain thinning, can improve the plasticity under heating status.
Zr(zirconium): the mechanical property increasing alloy, improves the surface-coated ability of foil.
Co(cobalt): in copper alloy, add cobalt element can put forward heavy alloyed intensity, hardness and specific conductivity further.
Si(silicon): the effect that deoxidation can be played, and the coating ability that can strengthen matrix.
Another object of the present invention is to provide a kind of working method of above-mentioned power cell carrying object copper alloy foil.
For achieving the above object, following technical scheme is taked:
A working method for power cell carrying object copper alloy foil, its step is as follows:
A. carry out preparing burden according to mass percent, feed intake, melting and cast;
B. milling face;
C. hot rolling;
D. cold breaking down;
E. trimming;
F. roll in;
G. process annealing;
H. five passage finish rolling;
I. anneal;
J. six passage foil finish rolling, packaging warehouse-in.
In step a, described in the concrete order that feeds intake be: first add copper (Cu) and silver (Ag), after fusing, then add cobalt (Co), cobalt (Co) wraps up into stove with Copper Foil, and next adds titanium (Ti) and silicon (Si), adds chromium (Cr) and zirconium (Zr) before coming out of the stove, stir, leave standstill 10min, cast.
In step a, the temperature of described melting is 1130 ~ 1150 DEG C, smelting time 1 ~ 3h; The temperature of described cast controls at 1100 ~ 1150 DEG C.
In step b, each milling 1mm of alloy upper and lower surface, each milling 0.5mm in face, left and right.
In step c, the general working rate of described hot rolling is 98%.
In step e, the band trimming of described copper alloy is 5 ~ 8mm.
In step f, the general working rate rolled in described is 90%.
In step g, the temperature of described process annealing is 600 ~ 850 DEG C, and the time is 1 ~ 3h.
In step h, the general working rate of described finish rolling is 80%.
In step I, the temperature of described annealing is 300 ~ 450 DEG C, and the time is 1 ~ 3h.
In step j, the general working rate of described six passage foil finish rolling is 95%.
Advantage of the present invention: compared with the Copper Foil being used for power cell with routine, power cell carrying object copper alloy foil of the present invention is a kind of alloy Copper Foil, its intensity is far above routine Copper Foil, and no matter be at conductivity, or performance that can be coated, corrosion-resistant and processability aspect is all very excellent.Further, the preparation process of this alloy material is fairly simple, and technical process is short, and energy consumption is low, and lumber recovery is high.
The tensile strength sigma b of power cell carrying object copper alloy foil of the present invention can reach 450 ~ 520MPa, and plastic elongation rate δ is 0.5 ~ 5%, and specific conductivity is 90 ~ 95%IACS.This copper alloy foil has high strength, high fatigability, good hydrophilic property, good heat resistance, has had both the advantage of good electroconductibility simultaneously, can substitute the electrolysis of fine copper class and the rolled copper foil of current driving force battery carrying object completely.
Below by embodiment, the present invention will be further described, but and do not mean that limiting the scope of the invention.
Embodiment
Embodiment 1
A kind of power cell carrying object copper alloy foil, according to mass percent, its composition comprises: Cr0.001%, Ag0.001%, Ti0.001%, Zr0.001%, Co0.001%, Si0.001%, and all the other are Cu.
The working method of above-mentioned power cell carrying object copper alloy foil comprises following technical process: a. carries out preparing burden according to above-mentioned mass percent, feed intake, melting and cast, the described concrete order fed intake is: first add commercially available copper (Cu) and silver (Ag), after fusing, add commercially available cobalt (Co) again, cobalt (Co) wraps up into stove with Copper Foil, after fusing, add commercially available titanium (Ti) and silicon (Si), commercially available chromium (Cr) and zirconium (Zr) is added before coming out of the stove, stir, leave standstill 10min, cast; Smelting temperature is 1130 DEG C, smelting time 1.5h; The temperature of cast controls at 1100 DEG C; B. milling face, each milling 1mm of alloy upper and lower surface, each milling 0.5mm in face, left and right; C. hot rolling, the general working rate of hot rolling is 98%; D. cold breaking down, e. trimming, the band trimming of copper alloy is 5 ~ 8mm; F. roll in, in the general working rate that rolls be 90%; G. process annealing, the temperature of process annealing is 700 DEG C, and the time is 1h; H. five passage finish rolling, the general working rate of five passage finish rolling is 80%; I. anneal, the temperature of annealing is 400 DEG C, and the time is 2h; J. six passage foil finish rolling, the general working rate of six passage foil finish rolling is 95%, and packaging warehouse-in, obtain power cell carrying object copper alloy foil 1.
Test the power cell carrying object copper alloy foil 1 obtained, the plastic elongation rate of product is 5%, and tensile strength is 454MPa, and specific conductivity is 95%IACS, and static hydrophilic angle is 89 °.
Embodiment 2-5
The power cell carrying object of embodiment 2-5 is by the preparation working method of copper alloy foil with embodiment 1, and its mass percent composition is in table 1, and test performance data are in table 2.
Embodiment 6
A kind of power cell carrying object copper alloy foil, according to mass percent, its composition comprises: Cr0.006%, Ag0.002%, Ti0.001%, Zr0.003%, Co0.003%, Si0.003%, and all the other are Cu.
The working method of above-mentioned power cell carrying object copper alloy foil comprises following technical process: a. carries out preparing burden according to above-mentioned mass percent, feed intake, melting and cast, the described concrete order fed intake is: first add commercially available copper (Cu) and silver (Ag), after fusing, add commercially available cobalt (Co) again, cobalt (Co) wraps up into stove with Copper Foil, after fusing, add commercially available titanium (Ti) and silicon (Si), commercially available chromium (Cr) and zirconium (Zr) is added before coming out of the stove, stir, leave standstill 10min, cast; Smelting temperature is 1150 DEG C, smelting time 1.5h; The temperature of cast controls at 1150 DEG C; B. milling face, each milling 1mm of alloy upper and lower surface, each milling 0.5mm in face, left and right; C. hot rolling, the general working rate of hot rolling is 98%; D. cold breaking down, e. trimming, the band trimming of copper alloy is 5 ~ 8mm; F. roll in, in the general working rate that rolls be 90%; G. process annealing, the temperature of process annealing is 600, and the time is 3h; H. five passage finish rolling, the general working rate of five passage finish rolling is 80%; I. anneal, the temperature of annealing is 450 DEG C, and the time is 1h; J. six passage foil finish rolling, the general working rate of six passage foil finish rolling is 95%, and packaging warehouse-in, obtain power cell carrying object copper alloy foil 6.
Test the power cell carrying object copper alloy foil 6 obtained, test performance data are in table 2.
Embodiment 7-10
The power cell carrying object of embodiment 7-10 is by the preparation working method of copper alloy foil with embodiment 6, and its mass percent composition is in table 1, and test performance data are in table 2.
Embodiment 11
A kind of power cell carrying object copper alloy foil, according to mass percent, its composition comprises: Cr0.001%, Ag0.003%, Ti0.001%, Zr0.001%, Co0.001%, Si0.001%, and all the other are Cu.
The working method of above-mentioned power cell carrying object copper alloy foil comprises following technical process: a. carries out preparing burden according to above-mentioned mass percent, feed intake, melting and cast, the described concrete order fed intake is: first add commercially available copper (Cu) and silver (Ag), after fusing, add commercially available cobalt (Co) again, cobalt (Co) wraps up into stove with Copper Foil, after fusing, add commercially available titanium (Ti) and silicon (Si), commercially available chromium (Cr) and zirconium (Zr) is added before coming out of the stove, stir, leave standstill 10min, cast; Smelting temperature is 1140 DEG C, smelting time 1.5h; The temperature of cast controls at 1120 DEG C; B. milling face, each milling 1mm of alloy upper and lower surface, each milling 0.5mm in face, left and right; C. hot rolling, the general working rate of hot rolling is 98%; D. cold breaking down, e. trimming, the band trimming of copper alloy is 5 ~ 8mm; F. roll in, in the general working rate that rolls be 90%; G. process annealing, the temperature of process annealing is 850 DEG C, and the time is 2h; H. five passage finish rolling, the general working rate of five passage finish rolling is 80%; I. anneal, the temperature of annealing is 300 DEG C, and the time is 3h; J. six passage foil finish rolling, the general working rate of six passage foil finish rolling is 95%, and packaging warehouse-in, obtain power cell carrying object copper alloy foil 11.
Test the power cell carrying object copper alloy foil 11 obtained, test performance data are in table 2.
Embodiment 12-16
The power cell carrying object of embodiment 12-16 is by the preparation working method of copper alloy foil with embodiment 11, and its mass percent composition is in table 1, and test performance data are in table 2.
The one-tenth of table 1, embodiment of the present invention 1-16 power cell carrying object copper alloy foil is grouped into (wt%)
Table 2, the embodiment of the present invention 1-16 power cell carrying object test performance of copper alloy foil
Therefore, the power cell carrying object of embodiment 1-16 with the tensile strength sigma b of copper alloy foil between 450 ~ 520MPa, plastic elongation rate δ is 0.5 ~ 5%, the overwhelming majority is between 2 ~ 5%, specific conductivity is between 90 ~ 95%IACS, static hydrophilic angle is between 89 ~ 99 °, therefore this copper alloy foil has the advantage of high strength, high fatigability, good hydrophilic property, good heat resistance, have both good electroconductibility simultaneously, the electrolysis of fine copper class and the rolled copper foil of current driving force battery carrying object can have been substituted completely.
Claims (5)
1. a power cell carrying object copper alloy foil, according to mass percent, its composition comprises: Cr0.001% ~ 0.01%, Ag0.001% ~ 0.005%, Ti0.001% ~ 0.005%, Zr0.001% ~ 0.003%, Co0.001% ~ 0.003%, Si0.001% ~ 0.003%, all the other are Cu.
2. power cell carrying object copper alloy foil according to claim 1, is characterized in that: described composition meets following condition: (a) Cu+Cr+Zr+Co >=99.975%; (b) 0.003%≤Cr+Co≤0.012%; (c) 2≤Cr/Ag≤8.
3. the power cell carrying object working method of copper alloy foil as claimed in claim 1 or 2, comprises the steps:
A. carry out preparing burden according to mass percent, feed intake, melting and cast;
B. milling face;
C. hot rolling;
D. cold breaking down;
E. trimming;
F. roll in;
G. process annealing;
H. five passage finish rolling;
I. anneal;
J. six passage foil finish rolling, packaging warehouse-in.
4. the working method of power cell carrying object copper alloy foil according to claim 3, it is characterized in that: described in the concrete order that feeds intake be: first add copper and silver, after fusing, add cobalt again, cobalt Copper Foil wraps up into stove, and next adds titanium and silicon, chromium and zirconium is added before coming out of the stove, stir, leave standstill 10min, cast.
5. the working method of power cell carrying object copper alloy foil according to claim 3, it is characterized in that: the temperature of described melting is 1130 ~ 1150 DEG C, the temperature of described cast controls at 1100 ~ 1150 DEG C; The each milling 1mm of alloy upper and lower surface, each milling 0.5mm in face, left and right; The general working rate of described hot rolling is 98%; The band trimming of described copper alloy is 5 ~ 8mm; The general working rate rolled in described is 90%; The temperature of described process annealing is 600 ~ 850 DEG C, and the time is 1 ~ 3h; The general working rate of described finish rolling is 80%; The temperature of described annealing is 300 ~ 450 DEG C, and the time is 1 ~ 3h; The general working rate of described six passage foil finish rolling is 95%.
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| CN201310684237.1A CN104711448A (en) | 2013-12-13 | 2013-12-13 | Copper alloy foil for power battery carrying fluid and processing method thereof |
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| CN201310684237.1A CN104711448A (en) | 2013-12-13 | 2013-12-13 | Copper alloy foil for power battery carrying fluid and processing method thereof |
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|---|---|---|---|---|
| JPH01319640A (en) * | 1988-06-20 | 1989-12-25 | Hitachi Cable Ltd | Oxygen-free copper base alloy and rolled copper foil for flexible printed circuit board |
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| JP4743977B2 (en) * | 2001-03-07 | 2011-08-10 | 株式会社神戸製鋼所 | Rolled copper alloy foil and manufacturing method thereof |
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| CN103080347A (en) * | 2010-08-27 | 2013-05-01 | 古河电气工业株式会社 | Copper alloy sheet and method for producing same |
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| JP2013095954A (en) * | 2011-10-31 | 2013-05-20 | Furukawa Electric Co Ltd:The | Copper alloy foil, manufacturing method of the same, electrode for lithium ion secondary battery with copper alloy foil as collector, and lithium ion secondary battery |
-
2013
- 2013-12-13 CN CN201310684237.1A patent/CN104711448A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01319640A (en) * | 1988-06-20 | 1989-12-25 | Hitachi Cable Ltd | Oxygen-free copper base alloy and rolled copper foil for flexible printed circuit board |
| US6627009B1 (en) * | 1999-11-19 | 2003-09-30 | Hitachi Cable Ltd. | Extrafine copper alloy wire, ultrafine copper alloy wire, and process for producing the same |
| JP4743977B2 (en) * | 2001-03-07 | 2011-08-10 | 株式会社神戸製鋼所 | Rolled copper alloy foil and manufacturing method thereof |
| CN103080347A (en) * | 2010-08-27 | 2013-05-01 | 古河电气工业株式会社 | Copper alloy sheet and method for producing same |
| CN102899519A (en) * | 2011-07-29 | 2013-01-30 | 日立电线株式会社 | Rolled copper foil and negative electrode of lithium ion secondary battery using same |
| JP2013095954A (en) * | 2011-10-31 | 2013-05-20 | Furukawa Electric Co Ltd:The | Copper alloy foil, manufacturing method of the same, electrode for lithium ion secondary battery with copper alloy foil as collector, and lithium ion secondary battery |
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Application publication date: 20150617 |