CN112877571A - Zero-zero one-five-millimeter high-performance double-sided photovoltaic cell foil and production method thereof - Google Patents
Zero-zero one-five-millimeter high-performance double-sided photovoltaic cell foil and production method thereof Download PDFInfo
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- CN112877571A CN112877571A CN202011636129.3A CN202011636129A CN112877571A CN 112877571 A CN112877571 A CN 112877571A CN 202011636129 A CN202011636129 A CN 202011636129A CN 112877571 A CN112877571 A CN 112877571A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
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Abstract
The invention discloses a zero-point zero-one-five-millimeter high-performance double-sided photovoltaic cell foil and a production method thereof, and belongs to the technical field of materials. The invention relates to a zero-point zero-one-five-millimeter high-performance double-sided photovoltaic cell foil which comprises the following components in percentage by mass: 0.1 to 0.15 percent of Si; 0.38 to 0.45 percent of Fe; cu 0.08-0.1%; 0.01 percent of Mn; 0.03 percent of Zn; 0.015 to 0.03 percent of Ti; 99.3 percent of Al; the balance being other unavoidable other components. The production method of the 0.015mm high-performance double-sided photovoltaic cell foil comprises the following steps of: casting and rolling, cold rolling, aluminum foil rough material rolling, rough rolling, medium rolling and finish rolling for 0.015 mm. The invention has scientific design and ingenious idea, and the high-performance double-sided photovoltaic cell foil with good quality and 0.015mm is prepared by adjusting the proportion of alloy components and process parameters in the production process.
Description
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a zero-point one-five-millimeter high-performance double-sided photovoltaic cell foil and a production method thereof.
Background
The development of new energy automobiles is an important component of low-carbon economy, and has important promotion effects on relieving energy supply and demand contradictions, improving the environment and promoting economic sustainable development. The power battery for the electric automobile is a lithium battery, an aluminum foil in the lithium battery exists as a current collector of a positive electrode, and the aluminum foil of the battery is different from a common single-zero foil and a common double-zero foil. The production technology of the aluminum foil for the battery has reached the leading level in the world. At present, the five-star aluminum industry already has a mature aluminum foil product series for batteries, covers the fields of power, digital code, energy storage and the like, has a plurality of strength gradient products, and has a complete client group and a mature production process technology. Among them, the aluminum foil for the 15mm high-performance double-sided photovoltaic cell independently developed in the five-star aluminum industry has high strength and high elongation, and has stable mass production capacity at present.
Aluminum foil for battery: the method is applied to the production of aluminum foil products of various batteries, and the battery foil products are mainly applied to the fields of digital batteries, batteries for automobile storage batteries, energy storage power stations, new energy automobile battery modules and the like. The product is different from the aluminum foil product of common use, and the product is required to have high conductivity, high aluminum foil performance and clean and good surface quality. At present, domestic high-grade battery foil products mainly depend on the import of Japanese and Korean. With the rapid development of domestic and foreign electronic industries and the global hot tide for new energy vehicles, the usage amount of battery foils is increased year by year, and the battery foils become an important variety of aluminum foil products from the added value and the market demand at present
The aluminum foil for batteries is actually used as a positive electrode material of lithium ion batteries, and in batteries, aluminum foils for other applications such as aluminum plastic films for soft package of batteries, tabs, modified carbon-coated foils, electrolytic foils and the like are also available. Therefore, the battery foil is simply called a battery foil having a plurality of surfaces. In fact, we now generally refer to cell foils, rather than literally cell foils, which should be distinguished from foils used in other applications on the cell. The lithium ion battery is used as an electrode of a current collector on one hand and also used as a carrier of a positive electrode material or a negative electrode material of a lithium battery on the other hand. Therefore, more precisely defined, it should be an aluminum foil for a current collector of a lithium battery.
For general battery foil products, the tensile strength is more than 180mpa, the elongation is more than 1.5%, and the high-strength battery foil is more than 230mpa, and the elongation is 2.0%. The tensile strength of the high-performance aluminum foil independently developed by the applicant is more than 250mpa, and the elongation is 4.0%. From the viewpoint of metal rolling, the higher the tensile strength and elongation, the greater the rolling difficulty, and the higher the requirements of the battery foil on the plate shape and surface quality, the greater the rolling difficulty.
The application field of the battery foil is mainly the electronic industry, such as power, digital, energy storage batteries and the like. The digital battery aluminum foil has wide application field and thinner thickness, and the thickness is more than 0.01mm at present in domestic maturity. The power type has relatively thicker thickness due to high compaction, and 0.015mm is also used as a high-strength high-elongation aluminum foil product, and the main application field is a power battery.
The production of 0.015mm high strength two-sided light aluminium foil, because its intensity and elongation are all higher, there are many technical problems in the production to need to overcome, mainly are: the high-strength double-sided smooth aluminum foil with the thickness of 0.015mm is very difficult to deform plastically, the alloy is crisp and hard in hand feeling, the difficulty in producing a finished product is high, the probability of strip breakage is high, and a stable rolling process is difficult to form; the tensile strength is required to be more than 250Mpa, the elongation is required to be more than 4%, and the requirement far exceeds the normal performance range of the aluminum foil product; the quality requirement is strict, and obvious plate shape defects are not allowed; the rolling processing is difficult, the reduction rate of each pass is more, the reduction rate of each pass is lower, the rolling force is increased, the speed is high, and the probability of surface vibration grains and plate shape defects in the production process is increased.
Therefore, it is an urgent need to solve the above problems by providing a zero-point zero-one-five mm high-performance double-sided photovoltaic cell foil and a method for producing the same.
Disclosure of Invention
An object of the present invention is to provide a 0.015mm high performance aluminum foil for double-sided photovoltaic cells, which solves at least some of the above problems.
The invention also aims to provide a production method of the aluminum foil for the 0.015mm high-performance double-sided photocell.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention relates to a zero-point zero-one-five-millimeter high-performance double-sided photovoltaic cell foil which comprises the following components in percentage by mass:
the balance being other unavoidable other components.
In some embodiments of the present invention, the components are, by mass:
the balance being other unavoidable other components.
In some embodiments of the present invention, the components are, by mass:
the balance being other unavoidable other components.
The invention relates to a production method of a 0.015mm high-performance double-sided photovoltaic cell foil, which is characterized by comprising the following steps of: casting and rolling, cold rolling, aluminum foil rough material rolling, rough rolling, medium rolling and finish rolling for 0.015 mm.
In some embodiments of the present invention, the finish rolling step of 0.015mm is performed in 5 passes.
In some embodiments of the present invention, the 5 passes specifically include: the first pass is from 0.26mm to 0.12 mm; the second pass is from 0.12mm to 0.06 mm; the third pass is from 0.06mm to 0.0285-0.0305 mm; the fourth pass is from 0.0285-0.0305mm to 0.017-0.02 mm; the fifth pass is pressed from 0.017-0.02mm to 0.015 mm.
In some embodiments of the present invention, the parameters of the working roll in each rolling pass of the aluminum foil blank are as follows:
when the rolling pass is 1-2, the convexity is 40-50 per mill, and the roughness RaIs 0.23-0.27 μm.
In some embodiments of the present invention, when the rolling pass of the aluminum foil rough material is 3, the convexity is 50-70 per mill, and the roughness R isaIs 0.12-0.15 μm.
In some embodiments of the invention, when the rolling pass of the aluminum foil rough material is 4-5, the convexity is 70-90 per mill, and the roughness R isaIs 0.09-0.12 μm.
In some embodiments of the present invention, the parameters of the aluminum foil blank rolling casting process are the casting speed: 750-1000 mm/min; length of casting and rolling area: 55-65 mm.
Compared with the prior art, the invention has the following beneficial effects:
the invention has scientific design and ingenious idea, and the high-performance double-sided photovoltaic cell foil with good quality and 0.015mm is prepared by adjusting the proportion of alloy components and process parameters in the production process.
Cu mainly exists in a solid solution state in the 1-series alloy, so that the alloy strength is contributed to a certain degree, the performance of the foil is improved by adjusting the Cu content, and then high tensile strength and high elongation are obtained by continuous work hardening.
The rolling reduction distribution of the aluminum foil rough material rolling process is adjusted, and the main idea is as follows: the method has the advantages that the rough rolling pass machining rate is improved, the finish rolling pass machining rate is reduced, the reduction rate is gradually reduced along with the improvement of work hardening, the stable rolling state is guaranteed, the rolling speed is further stabilized, the adjustable range of relevant parameters of the rolling mill is wider, and the method is of certain help for reducing the surface oil-carrying defects.
The working roll of the aluminum foil rough material rolling process is adjusted, the roughness range of the rough roll is reduced, the control is more accurate, the upper limit value is reduced, the rolling speed and the rolling parameters are reduced, and the parameter adjusting range is wider; the convexity of the working rolls of the last two passes is adjusted, and the convexity is increased, mainly for controlling the plate shape quality of high-strength products and facilitating metal deformation; the roughness of the working roll in the last pass is adjusted, and the roughness is reduced to obtain better product surface quality and reduce local bubble formation and surface edge formation defects mainly according to the condition that actual parameters of test production are larger.
Detailed Description
The present invention is further illustrated by the following examples, which include, but are not limited to, the following examples.
Example 1
The embodiment discloses the components and mass percentages of a 0.015mm high-performance double-sided photovoltaic cell foil disclosed by the invention:
the balance being other unavoidable other components.
Example 2
The embodiment discloses the components and mass percentages of a 0.015mm high-performance double-sided photovoltaic cell foil disclosed by the invention:
the balance being other unavoidable other components.
Example 3
The embodiment discloses the components and mass percentages of a 0.015mm high-performance double-sided photovoltaic cell foil disclosed by the invention:
the balance being other unavoidable other components.
Example 4
The embodiment discloses a production method of a 0.015mm high-performance double-sided photovoltaic cell foil, which comprises the following process routes: casting and rolling, cold rolling, aluminum foil rough material, rough rolling, intermediate rolling and finish rolling for 0.015 mm.
The production process has the following process control requirements:
1.1 casting and rolling procedure:
feeding structure
The proportion of the waste material is (0-20)% and the rest is pure aluminum ingot.
Melt quality control
Firstly, furnace burden is kept clean, melt quality is good, and aluminum foil production requirements are met
Controlling hydrogen content: not more than 0.12ml/100gAl
Quality control of the panel shape
Difference between the same plates: 0-0.03 mm;
convexity: 0-0.035 mm;
③ the plate-shaped curve: parabolic shape, no wedge-shaped plate, rib thickness (concave plate) and other defects
Casting and rolling process parameters
Casting and rolling speed: 750-1000mm/min
Casting and rolling area length: 55-65mm
1.2 strip working procedure
Quality control of the panel shape
Firstly, after the working roll is replaced each time, the roller needs to be preheated for more than 10 minutes, and before the finished product passes, 2-3 rolls of thick materials need to be produced, so that the thermal convexity of the roller is improved, and the roller shape is stabilized;
thirdly, selecting a proper plate shape control curve according to the width of the product and the alloy variety to ensure the plate shape quality;
fourthly, keeping the shape control system normal: when the supporting roller is replaced every time, the normal states of the spraying system and the roller system are confirmed, and abnormity is found and is timely processed;
surface quality control
Cleaning dust on the surface of an aluminum coil by using a clean wiping machine cloth before feeding, cleaning a rolling mill guide roller once by using the clean wiping machine cloth in each pass, and regularly cleaning oil sludge and foreign matters in an inlet and outlet conveying unit to ensure the cleanness of equipment;
strictly performing roll changing operation according to roll changing SOP (sequence of order) books;
sampling to determine the state of the roller before finished products are produced, determining whether the state meets the surface requirements of the products, and avoiding the defects of roller spots, surface stripes, black oil lines and the like in batches through a first piece;
fourthly, ensuring the rolling oil filtering system to be normal so as to ensure the quality of the rolling surface;
cleaning the surface of the sleeve. Before starting up, the sleeve is cleaned in advance, and when bad bottoming occurs. Cutting to ensure the priming quality not to form sleeve chuck or priming arris;
checking the end face condition before rolling on the machine, using corresponding cleaning cloth to process the projections on the end face, removing the outer ring with dirty or bad tread to ensure no foreign matter press-in during production.
1.3 aluminum foil Process
Specification states of the wool: 0.2-0.3mm (the specific width is determined according to the required width).
Rolling pass reduction distribution: see table one
Table one: 0.015mm high-performance double-sided photocell foil aluminum foil reduction pass distribution
| Thickness of finished product mm | Reduction pass distribution mm |
| 0.009 | 0.26-0.12-0.06-(0.0285-0.0305)-(0.017-0.02)-0.015 |
Secondly, the service conditions of the finished pass roller are shown in the second table
Table two: use condition of 0.015mm high-performance double-sided photovoltaic cell foil finished product pass roller
| Thickness of finished product mm | Roller number | Roller convexity thousandths | Roughness (Ra) of roller |
| 0.015 | 220-280 | 70-100 | 0.10-0.13 |
Fourthly, the proportion of the finished product pass additive: 9 to 12 percent of
The average pass processing rate: 42.2 percent
The parameters of the working roll are shown in the table III
Table three: 0.015mm double-sided photovoltaic cell foil work roll parameters
| Pass of rolling | Convexity thousandths | Roughness Ra,μm |
| 1 | 40-50 | 0.23-0.27 |
| 2 | 40-50 | 0.23-0.27 |
| 3 | 50-70 | 0.12-0.15 |
| 4 | 70-90 | 0.09-0.12 |
| 5 | 70-90 | 0.09-0.12 |
The 0.015mm high-performance double-sided photovoltaic cell foil prepared by the method has tensile strength of more than 250Mpa, elongation of 4.0 percent, no obvious plate shape defect and no local plate shape quality defect under the condition of low tension.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (10)
1. A zero-point zero-one-five-millimeter high-performance double-sided photovoltaic cell foil is characterized by comprising the following components in percentage by mass:
the balance being other unavoidable other components.
2. The zero-point zero-one-five millimeter high-performance double-sided photovoltaic cell foil as claimed in claim 1, wherein the composition comprises, in mass percent:
the balance being other unavoidable other components.
3. The zero-point zero-one-five millimeter high-performance double-sided photovoltaic cell foil as claimed in claim 1, wherein the composition comprises, in mass percent:
the balance being other unavoidable other components.
4. A method of producing a 0.015mm high performance double sided photovoltaic cell foil as claimed in any one of claims 1 to 3, comprising the steps of: casting and rolling, cold rolling, aluminum foil rough material rolling, rough rolling, medium rolling and finish rolling for 0.015 mm.
5. The production method according to claim 4, wherein the finish rolling is performed in 5 passes in the 0.015mm step.
6. The method according to claim 5, wherein the 5 passes are in particular: the first pass is from 0.26mm to 0.12 mm; the second pass is from 0.12mm to 0.06 mm; the third pass is from 0.06mm to 0.0285-0.0305 mm; the fourth pass is from 0.0285-0.0305mm to 0.017-0.02 mm; the fifth pass is pressed from 0.017-0.02mm to 0.015 mm.
7. The method for producing the high-performance double-sided photovoltaic cell foil as claimed in claim 6, wherein the working roll parameters of each rolling pass of aluminum foil rough rolling are as follows:
when the rolling pass is 1-2, the convexity is 40-50 per mill, and the roughness RaIs 0.23-0.27 μm.
8. The method as claimed in claim 7, wherein the aluminum foil blank has a crown of 50-70% o and a roughness R of 3 rolling passesaIs 0.12-0.15 μm.
9. The method as claimed in claim 8, wherein the aluminum foil blank has a crown of 70-90% o and a roughness R of 4-5 rolling passesaIs 0.09-0.12 μm.
10. The method for producing a high-performance double-sided photovoltaic cell foil as claimed in claim 9, wherein the casting and rolling process parameters are casting and rolling speed: 750-1000 mm/min; length of casting and rolling area: 55-65 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114226546A (en) * | 2021-12-09 | 2022-03-25 | 杭州五星铝业有限公司 | Production method of aluminum foil for ultra-high-performance power battery |
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