CN108188180B - Double-lithium foil preparation device and preparation method - Google Patents
Double-lithium foil preparation device and preparation method Download PDFInfo
- Publication number
- CN108188180B CN108188180B CN201810177537.3A CN201810177537A CN108188180B CN 108188180 B CN108188180 B CN 108188180B CN 201810177537 A CN201810177537 A CN 201810177537A CN 108188180 B CN108188180 B CN 108188180B
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- China
- Prior art keywords
- lithium
- rolling
- rolling roller
- roller
- isolation plate
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 81
- 239000011888 foil Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims abstract description 113
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000002955 isolation Methods 0.000 claims abstract description 50
- 238000000926 separation method Methods 0.000 claims abstract description 14
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a double lithium foil preparation device and a preparation method, comprising an upper rolling roller and a lower rolling roller, wherein a separation plate is arranged between the upper rolling roller and the lower rolling roller; the lower separator and the lower lithium strip are placed between a lower rolling roller and a separator for rolling. Simultaneously preparing lithium foils with two different thicknesses by adjusting the speed ratio of the upper rolling roller, the lower rolling roller and the isolation plate; the roller is separated from the lithium belt by a separation film and a separation plate, so that the adhesion is prevented; two lithium strips can be rolled at the same time, so that the efficiency is high; the rolled lithium belt is adhered to the isolating film, so that the problem that the lithium belt cannot be transferred due to too thin lithium belt is solved.
Description
Technical Field
The invention relates to the technical field of lithium ion battery production, in particular to a double-lithium-foil preparation device and a double-lithium-foil preparation method.
Background
The lithium ion battery has the advantages of high output voltage, no memory effect and the like, and is widely applied to mobile phone batteries and electric automobile industries at present; meanwhile, improving the performance of the lithium ion battery is also the most concerned problem in the lithium battery industry, and particularly, improving the capacity of the lithium battery and prolonging the service life of the lithium battery.
An important process in the production process of lithium batteries is formation, and the purpose of the process is to form a solid electrolyte membrane (SEI film) on the surface of a negative electrode of a lithium battery in the first charging process. However, the formation of the SEI film consumes a part of lithium, thereby causing a loss of lithium material and thus a decrease in battery capacity. In addition, in the cyclic use process of the lithium battery, the SEI film can be continuously consumed and repaired, dead lithium in the anode and the cathode can be continuously increased, the capacity of the battery is continuously reduced, and the cycle life of the battery is reduced.
In order to reduce capacity reduction caused by irreversible consumption of lithium ions in the first charge and discharge and cyclic use of the battery, a part of active lithium is pre-supplemented to a negative electrode plate of the lithium ion battery, so that the performance of the lithium ion battery is improved. The pre-replenishing lithium is an ultrathin lithium strip, the existing lithium strip preparation method generally adopts a synchronous or asynchronous rolling method, and rolling of lithium foils with different thicknesses is realized by controlling the pressure, the speed and the like of an upper roller and a lower roller of a rolling device, so that the lithium foil with one thickness can be produced at one time, and the production efficiency is lower.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: in order to overcome the defects in the prior art, the invention provides a double-lithium-foil preparation device and a double-lithium-foil preparation method.
The technical scheme adopted for solving the technical problems is as follows: the double lithium foil preparation device comprises an upper rolling roller and a lower rolling roller, wherein a separation plate is arranged between the upper rolling roller and the lower rolling roller, an upper rolling channel is formed between the upper rolling roller and the separation plate, and a lower rolling channel is formed between the lower rolling roller and the separation plate.
The rolling thickness of the lithium strip can be adjusted by adjusting the rolling speed ratio, and therefore, further, the rolling speed ratio between the upper rolling roller and the separator is the same as or different from the rolling speed ratio between the lower rolling roller and the separator. The lithium strips with the same thickness can be obtained up and down when the rolling speed ratios are the same, and the thicknesses of the lithium strips obtained up and down are different when the rolling speed ratios are different.
The preparation method of the double lithium foil comprises the preparation device and further comprises the following steps:
when rolling, the upper isolation film and the upper lithium belt are placed in an upper rolling channel between the upper rolling roller and the isolation plate, the upper lithium belt is positioned between the upper isolation film and the isolation plate, and enters between the upper rolling roller and the isolation plate for rolling, and the rotation linear speed of the upper rolling roller and the movement speed of the isolation plate are adjusted to form a certain speed ratio according to different lithium foil thicknesses after rolling; simultaneously, a lower isolation film and a lower lithium belt are arranged in a lower rolling channel between a lower rolling roller and an isolation plate, the lower lithium belt is arranged between the lower isolation film and the isolation plate, the lower lithium belt enters between the lower rolling roller and the isolation plate for rolling, the rotation linear speed of the lower rolling roller and the moving speed of the isolation plate are adjusted to form a certain speed ratio according to different lithium foil thicknesses after rolling, the upper lithium belt is thinned by rubbing and rolling the upper rolling roller and the isolation plate, and the lower lithium belt is thinned by rubbing and rolling the lower rolling roller and the isolation plate; rolling the rolled and bonded upper isolating film and upper lithium belt, and rolling the bonded lower isolating film and lower lithium belt.
The beneficial effects of the invention are as follows:
1. the roller is separated from the lithium belt by a separation film and a separation plate, so that the adhesion is prevented;
2. two lithium strips can be rolled at the same time, so that the efficiency is high;
3. the lithium foils with two different thicknesses can be prepared simultaneously by adjusting the speed ratio of the upper rolling roller, the lower rolling roller and the isolation plate;
4. the rolling roller linear speed is different from the separator linear speed, a rubbing rolling mode is formed, and the lithium belt can be rolled into ultrathin lithium foil with the thickness of less than 3 microns;
5. the rolled lithium belt is adhered to the isolating film, so that the problem that the lithium belt cannot be transferred due to too thin lithium belt is solved.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic structural view of a preferred embodiment of the present invention.
In the figure: 1. the upper rolling roller, the lower rolling roller, the upper isolation film, the upper lithium belt, the lower lithium belt, the isolation plate, the lower lithium belt, the upper isolation film, the lower isolation film, the upper lithium belt, the upper isolation film and the upper lithium belt, the lower isolation film and the lower lithium belt.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. The figure is a simplified schematic diagram illustrating the basic structure of the invention only by way of illustration, and therefore it shows only the constitution related to the invention.
As shown in fig. 1, the double lithium foil preparation device of the invention comprises an upper rolling roller 1 and a lower rolling roller 2, wherein a separation plate 5 is arranged between the upper rolling roller 1 and the lower rolling roller 2, an upper rolling channel is formed between the upper rolling roller 1 and the separation plate 5, and a lower rolling channel is formed between the lower rolling roller 2 and the separation plate 5.
The rolling thickness of the lithium strip can be adjusted by adjusting the rolling speed ratio, and therefore, further, the rolling speed ratio between the upper rolling roll 1 and the separator 5 is the same as or different from the rolling speed ratio between the lower rolling roll 2 and the separator 5. The lithium strips with the same thickness can be obtained up and down when the rolling speed ratios are the same, and the thicknesses of the lithium strips obtained up and down are different when the rolling speed ratios are different.
The preparation method of the double lithium foil comprises the preparation device and further comprises the following steps:
when in rolling, the upper isolation film 3 and the upper lithium belt 4 are arranged in an upper rolling channel between the upper rolling roller 1 and the isolation plate 5, the upper lithium belt 4 is arranged between the upper isolation film 3 and the isolation plate 5, and enters between the upper rolling roller 1 and the isolation plate 5 for rolling, and the rotation linear speed of the upper rolling roller 1 and the movement speed of the isolation plate 5 are adjusted to form a certain speed ratio according to different lithium foil thicknesses after rolling; simultaneously, a lower isolation film 7 and a lower lithium belt 6 are arranged in a lower rolling channel between a lower rolling roller 2 and an isolation plate 5, the lower lithium belt 6 is arranged between the lower isolation film 7 and the isolation plate 5, enters between the lower rolling roller 2 and the isolation plate 5 for rolling, the rotation linear speed of the lower rolling roller 2 and the moving speed of the isolation plate 5 are adjusted to be a certain speed ratio according to different lithium foil thicknesses after rolling, the upper lithium belt 4 is rolled thin by rubbing and rolling the upper rolling roller 1 and the isolation plate 5, and the lower lithium belt 6 is rolled thin by rubbing and rolling the lower rolling roller 2 and the isolation plate 5; the rolled and bonded upper isolating film and the upper lithium belt 8 are rolled, and the bonded lower isolating film and the lower lithium belt 9 are rolled. Lithium foils of two different thicknesses can be prepared simultaneously by adjusting the speed ratios of the upper rolling roller 1, the lower rolling roller 2 and the separator 5.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (2)
1. The utility model provides a two lithium foil preparation facilities which characterized in that: the rolling device comprises an upper rolling roller (1) and a lower rolling roller (2), wherein a separation plate (5) is arranged between the upper rolling roller (1) and the lower rolling roller (2), an upper rolling channel is formed between the upper rolling roller (1) and the separation plate (5), and a lower rolling channel is formed between the lower rolling roller (2) and the separation plate (5);
the rolling speed ratio between the upper rolling roller (1) and the isolation plate (5) is different from the rolling speed ratio between the lower rolling roller (2) and the isolation plate (5).
2. A preparation method of double lithium foils is characterized in that: comprising the preparation device of claim 1, further comprising the steps of:
when in rolling, the upper isolation film (3) and the upper lithium belt (4) are arranged in an upper rolling channel between the upper rolling roller (1) and the isolation plate (5), the upper lithium belt (4) is arranged between the upper isolation film (3) and the isolation plate (5), and enters between the upper rolling roller (1) and the isolation plate (5) for rolling, and the rotation linear speed of the upper rolling roller (1) and the moving speed of the isolation plate (5) are adjusted to form a certain speed ratio according to different lithium foil thicknesses after rolling; simultaneously, a lower isolation film (7) and a lower lithium belt (6) are arranged in a lower rolling channel between a lower rolling roller (2) and an isolation plate (5), the lower lithium belt (6) is arranged between the lower isolation film (7) and the isolation plate (5), and enters between the lower rolling roller (2) and the isolation plate (5) for rolling, and the rotation linear speed of the lower rolling roller (2) and the moving speed of the isolation plate (5) are adjusted to form a certain speed ratio according to different lithium foil thicknesses after rolling; the rolled and bonded upper isolating film and the upper lithium belt (8) are rolled, and the bonded lower isolating film and the lower lithium belt (9) are rolled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810177537.3A CN108188180B (en) | 2018-03-05 | 2018-03-05 | Double-lithium foil preparation device and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810177537.3A CN108188180B (en) | 2018-03-05 | 2018-03-05 | Double-lithium foil preparation device and preparation method |
Publications (2)
| Publication Number | Publication Date |
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| CN108188180A CN108188180A (en) | 2018-06-22 |
| CN108188180B true CN108188180B (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810177537.3A Active CN108188180B (en) | 2018-03-05 | 2018-03-05 | Double-lithium foil preparation device and preparation method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186132A (en) * | 2019-07-05 | 2021-01-05 | 宁德时代新能源科技股份有限公司 | Device for lithium supplement of pole piece |
| CN112170488A (en) * | 2019-07-05 | 2021-01-05 | 宁德时代新能源科技股份有限公司 | Mechanism for forming lithium film and device for supplementing lithium to pole piece |
| CN111312983B (en) * | 2020-02-25 | 2023-06-30 | 惠州亿纬锂能股份有限公司 | Negative plate rolling device, method for prelithiation of negative plate by using negative plate rolling device and application of negative plate rolling device |
| CN115475831B (en) * | 2022-09-29 | 2023-04-07 | 广东捷盟智能装备有限公司 | Material belt rolling method and material belt rolling system |
Citations (8)
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|---|---|---|---|---|
| SU1248110A1 (en) * | 1985-04-01 | 1996-01-10 | Уральский политехнический институт им.С.М.Кирова | Method of step-type rolling of casting and mill for its realization |
| JP2001205305A (en) * | 2000-01-28 | 2001-07-31 | Nippon Steel Corp | Mill and method for rolling sheet strip |
| KR100788881B1 (en) * | 2007-02-27 | 2007-12-27 | 김창락 | Dual pass milling apparatus and the method thereof |
| CN104169012A (en) * | 2012-02-24 | 2014-11-26 | 丹尼尔和科菲森梅克尼齐有限公司 | Method for controlling a two continuous strands rolling plant |
| CN104332586A (en) * | 2014-09-02 | 2015-02-04 | 惠州亿纬锂能股份有限公司 | Production method and production equipment of ultrathin lithium belt |
| CN204558583U (en) * | 2015-04-29 | 2015-08-12 | 宁德时代新能源科技有限公司 | Lithium band production equipment |
| CN106981625A (en) * | 2017-05-27 | 2017-07-25 | 天津中能锂业有限公司 | A kind of production method of complex lithium band |
| CN207899864U (en) * | 2018-03-05 | 2018-09-25 | 中航锂电技术研究院有限公司 | Double lithium foil preparation facilities |
-
2018
- 2018-03-05 CN CN201810177537.3A patent/CN108188180B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1248110A1 (en) * | 1985-04-01 | 1996-01-10 | Уральский политехнический институт им.С.М.Кирова | Method of step-type rolling of casting and mill for its realization |
| JP2001205305A (en) * | 2000-01-28 | 2001-07-31 | Nippon Steel Corp | Mill and method for rolling sheet strip |
| KR100788881B1 (en) * | 2007-02-27 | 2007-12-27 | 김창락 | Dual pass milling apparatus and the method thereof |
| CN104169012A (en) * | 2012-02-24 | 2014-11-26 | 丹尼尔和科菲森梅克尼齐有限公司 | Method for controlling a two continuous strands rolling plant |
| CN104332586A (en) * | 2014-09-02 | 2015-02-04 | 惠州亿纬锂能股份有限公司 | Production method and production equipment of ultrathin lithium belt |
| CN204558583U (en) * | 2015-04-29 | 2015-08-12 | 宁德时代新能源科技有限公司 | Lithium band production equipment |
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| CN108188180A (en) | 2018-06-22 |
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Address after: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Applicant after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Applicant after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Address before: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Applicant before: Kaibo Energy Technology Co.,Ltd. Applicant before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Address after: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Applicant after: Kaibo Energy Technology Co.,Ltd. Applicant after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Address before: No.88 Jintan Avenue, Jintan District, Changzhou City, Jiangsu Province Applicant before: CHINA AVIATION LITHIUM BATTERY RESEARCH INSTITUTE Co.,Ltd. Applicant before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |
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Effective date of registration: 20220110 Address after: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Applicant after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Applicant after: Zhongchuangxin Aviation Technology Co.,Ltd. Address before: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Applicant before: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Applicant before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |
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Country or region after: China Address after: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Applicant after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Applicant after: China Innovation Aviation Technology Group Co.,Ltd. Address before: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Applicant before: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Country or region before: China Applicant before: Zhongchuangxin Aviation Technology Co.,Ltd. |
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