CN105057354B - Production technology for rolled copper foil for lithium battery - Google Patents
Production technology for rolled copper foil for lithium battery Download PDFInfo
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- CN105057354B CN105057354B CN201510588053.4A CN201510588053A CN105057354B CN 105057354 B CN105057354 B CN 105057354B CN 201510588053 A CN201510588053 A CN 201510588053A CN 105057354 B CN105057354 B CN 105057354B
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Abstract
The invention discloses a production technology for rolled copper foil for a lithium battery. Rough rolling, intermediate annealing, intermediate rolling, semi-finished product annealing, finished product rolling, anti-sticking agent spraying, finished product annealing, finished product cleaning and splitting processing are conducted on a selected TU2 anaerobic copper casting blank, then the rolled copper foil for the lithium battery is obtained, and the content of copper of the copper foil product is larger than 99.97%, the copper foil is in a soft state M, the tensile strength of the copper foil is larger than or equal to 140 MPa, ductility is larger than or equal to 10%, and electrical conductivity is larger than or equal to 100% of the IACS. The performance movement and balance of the copper foil are good, most obviously, ductility is improved, so that in the production technology of the lithium ion battery production technology, the copper foil is not prone to being broken when being pressed, and the finished product rate is increased.
Description
Technical field
The present invention relates to a kind of lithium battery rolled copper foil production technology.
Background technology
Recently as the fast development of global mobile terminal device, country vigorously supports to New-energy electric vehicle, lithium
Battery requirements also expand rapidly.Used as one of critical material for producing lithium ion battery, the quality of its quality is directly affected Copper Foil
To the manufacture craft and combination property of lithium ion battery.Copper Foil is used as lithium ion battery cathode collector, and performance requirements is high,
Harmonious ratio is relatively inaccessible to, existing electrolytic copper foil unstable properties, it is impossible to meet the performance of lithium ion battery production Copper Foil
Require.Additionally, in prior art, general electrolytic copper foil copper content >=99.98%, hard state Y of presentation, tensile strength >=350MPa,
Elongation percentage >=8%, and in lithium ion battery production technology, secondary compacting can be carried out to Copper Foil, though micro change, elongation percentage
It is low to often result in Copper Foil fracture, reduce yield rate.
The content of the invention
The purpose of the present invention is the shortcoming for overcoming prior art, there is provided a kind of lithium battery rolled copper foil production technology, with
Acquisition meets the performance requirement of lithium ion battery production Copper Foil.
To reach above-mentioned purpose, the technical solution used in the present invention is：A kind of lithium battery rolled copper foil production technology, institute
State production technology to comprise the steps：
（1）Raw material is selected, from the oxygen-free copper strand that the qualified trade mark of Jing horizontal castings is TU2 as raw material；
（2）Roughing, by the oxygen-free copper strand roughing cogging of multi-pass is carried out, and obtains copper strips blank；
（3）Intermediate annealing, the copper strips blank Jing after roughing is made annealing treatment, and wherein annealing temperature is 400 DEG C
～500 DEG C, the heating-up time is 4～5h, and temperature retention time is 4～6h；
（4）In roll, by Jing steps（3）Annealing the copper strips blank carry out being rolled in multi-pass, obtain thickness compared with
Little semi-finished product copper strips；
（5）Semi-finished product are annealed, and the semi-finished product copper strips is made annealing treatment, and wherein annealing temperature is 300 DEG C～400
DEG C, the heating-up time is 4～5h, and temperature retention time is 4～6h；
（6）Finished product is rolled, by Jing steps（5）The semi-finished product copper strips after annealing carries out the rolling of multi-pass
Reason, obtains the finished product copper strips that thickness is 0.035～0.05mm；
（7）Anti-adhesion agent is applied, on the surface of the finished product copper strips anti-adhesion agent is smeared；
（8）Finished products, the finished product copper strips for being coated with anti-adhesion agent is made annealing treatment, wherein, annealing temperature is
250 DEG C～300 DEG C, the heating-up time is 4～5h, and temperature retention time is 4～6h；
（9）Finished product is cleaned, by Jing steps（8）The finished product copper strips after annealing is cleaned successively；
（10）Cutting process, by cleaning after the finished product copper strips cut, obtain lithium battery rolled copper foil product.
Preferably, the step（2）In with the step（6）In, adopt during rolling for four roll reversing rollers；The step
Suddenly（4）In, adopt during rolling for six roll reversing rollers.
Preferably, the step（2）In, the speed of roughing is 2.3m/s to 3.6m/s, the copper strips obtained after roughing
The thickness of blank is 0.53mm.
Preferably, the step（4）In, in roll after obtain the semi-finished product copper strips thickness be 0.1mm.
Preferably, the step（4）In, in when rolling to the tension force of the copper strips blank in below 0.6t.
Preferably, the step（6）In, speed during rolling is 2m/s.
Preferably, the step（9）In, during cleaning the finished product copper strips carried out successively ungrease treatment, pickling processes and
The treatment fluid pH value of Passivation Treatment, wherein ungrease treatment is more than or equal to 12, and the treatment fluid pH value of pickling processes is less than 1, at passivation
The treatment fluid pH value of reason is 6.5～7.5, and the electrical conductivity of the treatment fluid of Passivation Treatment is in below 300 μ s/cm.
Due to the utilization of above-mentioned technical proposal, the present invention has compared with prior art following advantages：Using the application's
Copper Foil product of the lithium battery obtained by rolled copper foil production technology, its copper content>99.97%, soft state M, its tensile strength is presented
>=140MPa, elongation percentage >=10%, conductance >=100%IACS, its performance motion is harmonious good, wherein being the most significantly
Elongation percentage is improved so that in lithium ion battery production technology, and the phenomenon of fracture is less prone to when Copper Foil is pressed, and improves
Yield rate.
Specific embodiment
Technical scheme is further elaborated with reference to specific embodiment.
Embodiment 1
The lithium battery of embodiment rolled copper foil is obtained successively using following steps：
（1）Raw material select, from Jing horizontal continuous casting process obtain the qualified trade mark for TU2 oxygen-free copper strand as original
Material, is 16.3mm as the thickness of the oxygen-free copper strand of raw material in the present embodiment；
（2）Roughing, the roughing cogging that above-mentioned oxygen-free copper strand carries out multi-pass is processed, to obtain copper strips blank.Herein,
Roughing adopt four roll reversing rollers, the speeds control of roughing between 2.3m/s to 3.6m/s, the oxygen-free copper strand Jing of 16.3mm
The roughing thickness of multi-pass is changed into successively after 10.5mm -6.5mm -3.5mm -2.0mm -0.8mm -0.53mm, i.e. roughing
Copper strips blank thickness be 0.53mm；
（3）Intermediate annealing, the copper strips blank that roughing is obtained is made annealing treatment, and wherein annealing temperature is controlled at 400 DEG C
～500 DEG C, the heating-up time is 4～5h, and temperature retention time is 4～6h, and in the present embodiment, annealing temperature is 450 DEG C or so, is heated up
Time 4h, temperature retention time 5h, after insulation more than natural cooling 10h；
（4）In roll, the copper strips blank of Jing intermediate annealing process is carried out being rolled in multi-pass, obtain thickness less half into
Product copper strips.Herein, roll in using six roll reversing rollers, to the tension force of copper strips blank in below 0.6t, this enforcement during rolling
Example in carry out being rolled in 4 passages, the thickness of copper strips blank is changed into successively 0.32mm -0.2mm -0.14mm -0.1mm, i.e., in
The thickness that semi-finished product copper strips is obtained after rolling is 0.1mm；
（5）Semi-finished product anneal, above-mentioned semi-finished product copper strips is made annealing treatment, wherein annealing temperature control 300 DEG C～
400 DEG C, the heating-up time is 4～5h, and temperature retention time is 4～6h, and in the present embodiment, annealing temperature is 350 DEG C or so, during intensification
Between 4h, temperature retention time 5h, after insulation more than natural cooling 10h；
（6）Finished product is rolled, and the semi-finished product copper strips after annealed process is carried out into the rolling process of multi-pass, is obtained thickness and is
The finished product copper strips of 0.035～0.05mm.Here, this time rolling adopts four roll reversing rollers, and speed during rolling is 2m/s.
The finished product copper strips thickness for obtaining is needed to be 0.035mm in the present embodiment, through the rolling of 4 passages, the thickness of copper strips changes successively
For 0.07mm -0.055mm -0.044mm -0.035mm, that is, obtain finished product copper strips of the thickness for 0.035mm；
（7）Anti-adhesion agent is applied, on the surface of finished product copper strips anti-adhesion agent is smeared；
（8）Finished products, the finished product copper strips for being coated with anti-adhesion agent is made annealing treatment, and wherein annealing temperature control exists
250 DEG C～300 DEG C, the heating-up time is 4～5h, and temperature retention time is 4～6h, and in the present embodiment, annealing temperature is 250 DEG C of left sides
The right side, heating-up time 4h, temperature retention time 5h, after insulation more than natural cooling 10h；
（9）Finished product is cleaned, and the finished product copper strips Jing after finished products process is cleaned, successively to finished product copper strips during cleaning
Ungrease treatment, pickling processes and Passivation Treatment are carried out, the wherein treatment fluid pH value of ungrease treatment is more than or equal to 12, pickling processes
Treatment fluid pH value is less than 1, and the treatment fluid pH value of Passivation Treatment is 6.5～7.5, and the electrical conductivity of the treatment fluid of Passivation Treatment exists
Below 300 μ s/cm；
（10）Cutting is processed, and the finished product copper strips after cleaning is cut on request, is obtained lithium battery and is produced with rolled copper foil
Product.
The Copper Foil product obtained using the above-mentioned technique of the application, its copper content>99.97%, soft state M, its tensile strength is presented
>=140MPa, elongation percentage >=10%, conductance >=100%IACS, its performance motion is harmonious good, wherein being the most significantly
Elongation percentage is improved so that in lithium ion battery production technology, and the phenomenon of fracture is less prone to when Copper Foil is pressed, and improves
Yield rate.
Above-described embodiment technology design only to illustrate the invention and feature, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and be carried out, can not be limited the scope of the invention with this, all according to the present invention
Equivalence changes or modification that Spirit Essence is made, all should cover within the scope of the present invention.
Claims (7)
1. a kind of lithium battery rolled copper foil production technology, it is characterised in that：The production technology comprises the steps：
（1）Raw material is selected, from the oxygen-free copper strand that the qualified trade mark of Jing horizontal castings is TU2 as raw material；
（2）Roughing, by the oxygen-free copper strand roughing cogging of multi-pass is carried out, and obtains copper strips blank；
（3）Intermediate annealing, the copper strips blank Jing after roughing is made annealing treatment, and wherein annealing temperature is 400 DEG C～500
DEG C, the heating-up time is 4～5h, and temperature retention time is 4～6h；
（4）In roll, by Jing steps（3）The copper strips blank of annealing carries out being rolled in multi-pass, obtains thickness less
Semi-finished product copper strips；
（5）Semi-finished product are annealed, and the semi-finished product copper strips is made annealing treatment, and wherein annealing temperature is 300 DEG C～400 DEG C, is risen
The warm time is 4～5h, and temperature retention time is 4～6h；
（6）Finished product is rolled, by Jing steps（5）The semi-finished product copper strips after annealing carries out the rolling process of multi-pass, obtains
Take the finished product copper strips that thickness is 0.035～0.05mm；
（7）Anti-adhesion agent is applied, on the surface of the finished product copper strips anti-adhesion agent is smeared；
（8）Finished products, the finished product copper strips for being coated with anti-adhesion agent is made annealing treatment, wherein, annealing temperature is 250 DEG C
～300 DEG C, the heating-up time is 4～5h, and temperature retention time is 4～6h；
（9）Finished product is cleaned, by Jing steps（8）The finished product copper strips after annealing is cleaned successively；
（10）Cutting process, by cleaning after the finished product copper strips cut, obtain lithium battery rolled copper foil product.
2. lithium battery according to claim 1 rolled copper foil production technology, it is characterised in that：The step（2）In with
The step（6）In, adopt during rolling for four roll reversing rollers；The step（4）In, adopt during rolling for six rollers it is reversible
Milling train.
3. lithium battery according to claim 1 rolled copper foil production technology, it is characterised in that：The step（2）In, slightly
The speed rolled is 2.3m/s to 3.6m/s, and the thickness of the copper strips blank obtained after roughing is 0.53mm.
4. lithium battery according to claim 1 rolled copper foil production technology, it is characterised in that：The step（4）In, in
The thickness of the semi-finished product copper strips obtained after rolling is 0.1mm.
5. lithium battery according to claim 1 rolled copper foil production technology, it is characterised in that：The step（4）In, in
To the tension force of the copper strips blank in below 0.6t when rolling.
6. lithium battery according to claim 1 rolled copper foil production technology, it is characterised in that：The step（6）In, roll
Speed when processed is 2m/s.
7. lithium battery according to claim 1 rolled copper foil production technology, it is characterised in that：The step（9）In, clearly
Carry out to the finished product copper strips ungrease treatment, pickling processes and Passivation Treatment, wherein the treatment fluid PH of ungrease treatment when washing successively
Value is more than or equal to 12, and the treatment fluid pH value of pickling processes is less than 1, and the treatment fluid pH value of Passivation Treatment is 6.5～7.5, and is passivated
The electrical conductivity of the treatment fluid of process is in below 300 μ s/cm.
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| CN105543746B (en) * | 2016-01-29 | 2017-08-15 | 灵宝金源朝辉铜业有限公司 | Rolled copper foil softening annealing process |
| CN106513438B (en) * | 2016-10-31 | 2017-12-22 | 中色奥博特铜铝业有限公司 | A kind of preparation method of the high-precision rolled copper foil of lithium battery |
| CN107937849B (en) * | 2017-11-23 | 2019-09-13 | 福州大学 | A kind of annealing process of TU2 tubing |
| CN108246804B (en) * | 2018-01-12 | 2019-11-05 | 中色奥博特铜铝业有限公司 | A kind of preparation method of high bending performance rolled copper foil |
| CN108715922A (en) * | 2018-07-21 | 2018-10-30 | 安徽启慧信息科技有限公司 | A kind of automobile cover plate production calendering technology |
| EP4024551A4 (en) | 2020-03-03 | 2023-05-24 | Ningde Amperex Technology Limited | Electrolyte and electrochemical device |
| CN113083897B (en) * | 2021-04-07 | 2022-12-27 | 太原晋西春雷铜业有限公司 | Preparation method of high-uniformity surface of copper or copper alloy strip |
| CN113426831A (en) * | 2021-05-30 | 2021-09-24 | 江阴艾力特机械制造有限公司 | Single-stand reversible rolling process for ultrathin wide copper strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH1136054A (en) * | 1997-07-18 | 1999-02-09 | Nippon Foil Mfg Co Ltd | Production of aluminum foil for electrode of electrolytic capacitor |
| CN102259252B (en) * | 2011-06-14 | 2015-08-05 | 福建紫金铜业有限公司 | A kind of preparation method of high-elasticity Sn-P bronze alloy foil |
| CN103028605A (en) * | 2011-09-29 | 2013-04-10 | 扬州金悦铜业有限公司 | Rolling process for preparing copper foil |
| CN104630550A (en) * | 2013-11-08 | 2015-05-20 | 青岛宏泰铜业有限公司 | High precision H65 brass belt production technology |
| CN104046935B (en) * | 2014-06-28 | 2015-11-04 | 西安瑞鑫科金属材料有限责任公司 | A kind of preparation method of palladium-copper alloy foil |
| CN104801542A (en) * | 2015-05-06 | 2015-07-29 | 无锡丰元新材料科技有限公司 | High-precision rolled copper foil for high-energy environment-friendly battery |
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