CN113369304A - Control method for reducing aluminum powder on surface of battery foil - Google Patents
Control method for reducing aluminum powder on surface of battery foil Download PDFInfo
- Publication number
- CN113369304A CN113369304A CN202110588604.2A CN202110588604A CN113369304A CN 113369304 A CN113369304 A CN 113369304A CN 202110588604 A CN202110588604 A CN 202110588604A CN 113369304 A CN113369304 A CN 113369304A
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- Prior art keywords
- battery foil
- rolling
- alloy
- oil
- battery
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- 239000011888 foil Substances 0.000 title claims abstract description 99
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000010731 rolling oil Substances 0.000 claims abstract description 42
- 239000000654 additive Substances 0.000 claims abstract description 33
- 230000000996 additive effect Effects 0.000 claims abstract description 30
- -1 alcohol ester Chemical class 0.000 claims abstract description 30
- 238000005097 cold rolling Methods 0.000 claims abstract description 30
- 150000002148 esters Chemical class 0.000 claims abstract description 30
- 238000005096 rolling process Methods 0.000 claims abstract description 25
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003921 oil Substances 0.000 claims abstract description 18
- 238000000137 annealing Methods 0.000 claims abstract description 15
- 229910045601 alloy Inorganic materials 0.000 claims description 39
- 239000000956 alloy Substances 0.000 claims description 39
- 229910000838 Al alloy Inorganic materials 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- 239000000047 product Substances 0.000 claims description 13
- 238000007670 refining Methods 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 9
- 238000007872 degassing Methods 0.000 claims description 9
- 239000011265 semifinished product Substances 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 239000011343 solid material Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000009749 continuous casting Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000010943 off-gassing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0242—Lubricants
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a control method for reducing aluminum powder on the surface of a battery foil, which ensures that the oil film strength on the surface of the battery foil is not broken in the cold rolling process by controlling the oil acidity of rolling oil and the alcohol and ester content in an alcohol ester additive in the three-time cold rolling process, so that the rolling oil in the normal rolling process can adsorb and roll the aluminum powder in a polar manner, and simultaneously ensures the uniformity of the grain structure on the surface of the battery foil through the annealing treatment between the first cold rolling and the second cold rolling, so that the aluminum powder on the surface of the battery foil is easier to fall off.
Description
Technical Field
The invention belongs to the field of battery aluminum foils, and particularly relates to a control method for reducing aluminum powder on the surface of a battery foil.
Background
The aluminum foil for the battery is widely applied to various fuel new energy industries, and according to the characteristics of aluminum foil products: the stability of the aluminum foil conductivity is related to the uniformity and stability of the slurry on the surface of the aluminum foil, so that the quality of pinholes on the surface of the aluminum foil for the battery needs to be strictly controlled in order to ensure the stability of the aluminum foil conductivity. The models of the current commonly used battery aluminum foils are 1060H18 pure aluminum alloy and 1235D-H18 pure aluminum alloy, and because the aluminum powder remained on the surfaces of the two kinds of pure aluminum alloys in the rolling process is too heavy, the surface treatment of the subsequent aluminum foil is seriously influenced.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a control method for lightening aluminum powder on the surface of a battery foil, which comprises the following steps:
(1) smelting: adding solid materials into a smelting furnace, raising the temperature of the smelting furnace to 740 ℃, and uniformly stirring to obtain an aluminum alloy solution, wherein the solid materials are pure aluminum ingots, intermediate alloys and other metal additives, and the aluminum alloy solution is 1060 alloy melt or 1235D alloy solution;
(2) refining and degassing: adding a refining agent into the molten aluminum alloy obtained in the step (1) for refining and slagging off, and degassing and filtering the molten aluminum alloy by using a degassing device after the slagging off process is finished to obtain casting aluminum liquid;
(3) casting and rolling: continuously casting the cast aluminum liquid obtained in the step (2) into a battery foil blank through a continuous casting machine, wherein the battery foil blank is a 1060 alloy battery foil blank or a 1235D alloy battery foil blank, the thickness of the 1060 alloy battery foil blank is controlled to be 6.8 +/-0.2 mm, and the thickness of the 1235D alloy battery foil blank is controlled to be 7.0 +/-0.2 mm;
(4) first cold rolling: rolling the battery foil blank obtained in the step (3) into a battery foil preform through a cold rolling mill, spraying rolling oil containing an alcohol ester additive onto the battery foil preform through a rolling oil spray head in the rolling process, wherein the oil acid value of the rolling oil is controlled to be 0.22-0.32KOH/g, the alcohol content in the alcohol ester additive accounts for 7.5-8.5%, and the ester content accounts for 1.5-2.5%;
(5) annealing treatment: annealing the battery foil preform obtained in the step (4), wherein the battery foil preform is 1060 alloy battery foil preform or 1235D alloy battery foil preform, and the annealing temperature of the 1060 alloy battery foil preform is 420 ℃, and the annealing temperature of the 1235D alloy battery foil preform is 525 ℃;
(6) and (3) second cold rolling: rolling the annealed battery foil preform into a battery foil semi-finished product by using a cold rolling mill, spraying rolling oil containing an alcohol ester additive onto the battery foil semi-finished product by using a rolling oil spray head in the rolling process, wherein the acid value of an oil product of the rolling oil is controlled to be 0.20-0.30KOH/g, the alcohol content in the alcohol ester additive accounts for 7.5-8.5%, and the ester content accounts for 1.5-2.5%;
(7) and (3) cold rolling for the third time: rolling the semi-finished product of the battery foil obtained in the step (6) into a finished product of the battery foil by a cold rolling mill, spraying rolling oil containing an alcohol ester additive onto the finished product of the battery foil by a rolling oil spray head in the rolling process, wherein the acid value of the oil product of the rolling oil is controlled to be 0.20-0.30KOH/g, the alcohol content in the alcohol ester additive accounts for 3-4%, and the ester content accounts for 1.5-2.5%
Further, the temperature in the melting furnace in the step (1) should not be lower than 720 ℃.
Furthermore, the temperature of the aluminum alloy melt is not lower than 690 ℃ during refining and slagging-off in the step (2).
Further, the 1060 alloy battery foil blank in step (3) had a thickness of 6.8mm and the 1235D alloy battery foil blank had a thickness of 7.0 mm.
Furthermore, the acid value of the rolling oil in the step (4) is 0.3KOH/g, the ratio of the alcohol content to the ester content in the alcohol ester additive is 8 percent respectively, and the ratio of the ester content is 2 percent.
Furthermore, the acid value of the rolling oil in the step (6) is 0.25KOH/g, the ratio of the alcohol content to the ester content in the alcohol ester additive is 7.5 percent respectively, and the ratio of the ester content is 1.5 percent.
Furthermore, the acid value of the rolling oil in the step (7) is 0.25KOH/g, the ratio of the alcohol content to the ester content in the alcohol ester additive is 3 percent respectively, and the ratio of the ester content is 1.5 percent.
Has the advantages that: the invention discloses a control method for reducing aluminum powder on the surface of a battery foil, which ensures that the oil film strength on the surface of the battery foil is not broken in the cold rolling process by controlling the oil acidity of rolling oil and the alcohol and ester content in an alcohol ester additive in the three-time cold rolling process, so that the rolling oil in the normal rolling process can adsorb and roll the aluminum powder in a polar manner, and simultaneously ensures the uniformity of the grain structure on the surface of the battery foil through the annealing treatment between the first cold rolling and the second cold rolling, so that the aluminum powder on the surface of the battery foil is easier to fall off.
Detailed Description
In order to enhance the understanding of the present invention, the present invention will be described in further detail with reference to the following examples, which are only for the purpose of illustrating the present invention and are not to be construed as limiting the scope of the present invention.
A control method for lightening aluminum powder on the surface of a battery foil comprises the following steps:
(1) smelting: adding solid materials into a smelting furnace, raising the temperature of the smelting furnace to 740 ℃, and uniformly stirring to obtain an aluminum alloy solution, wherein the solid materials are pure aluminum ingots, intermediate alloys and other metal additives, and the aluminum alloy solution is 1060 alloy melt or 1235D alloy solution;
(2) refining and degassing: adding a refining agent into the molten aluminum alloy obtained in the step (1) for refining and slagging off, and degassing and filtering the molten aluminum alloy by using a degassing device after the slagging off process is finished to obtain casting aluminum liquid;
(3) casting and rolling: continuously casting the cast aluminum liquid obtained in the step (2) into a battery foil blank through a continuous casting machine, wherein the battery foil blank is a 1060 alloy battery foil blank or a 1235D alloy battery foil blank, the thickness of the 1060 alloy battery foil blank is controlled to be 6.8 +/-0.2 mm, and the thickness of the 1235D alloy battery foil blank is controlled to be 7.0 +/-0.2 mm;
(4) first cold rolling: rolling the battery foil blank obtained in the step (3) into a battery foil preform through a cold rolling mill, spraying rolling oil containing an alcohol ester additive onto the battery foil preform through a rolling oil spray head in the rolling process, wherein the oil acid value of the rolling oil is controlled to be 0.22-0.32KOH/g, the alcohol content in the alcohol ester additive accounts for 7.5-8.5%, and the ester content accounts for 1.5-2.5%;
(5) annealing treatment: annealing the battery foil preform obtained in the step (4), wherein the battery foil preform is 1060 alloy battery foil preform or 1235D alloy battery foil preform, and the annealing temperature of the 1060 alloy battery foil preform is 420 ℃, and the annealing temperature of the 1235D alloy battery foil preform is 525 ℃;
(6) and (3) second cold rolling: rolling the annealed battery foil preform into a battery foil semi-finished product by using a cold rolling mill, spraying rolling oil containing an alcohol ester additive onto the battery foil semi-finished product by using a rolling oil spray head in the rolling process, wherein the acid value of an oil product of the rolling oil is controlled to be 0.20-0.30KOH/g, the alcohol content in the alcohol ester additive accounts for 7.5-8.5%, and the ester content accounts for 1.5-2.5%;
(7) and (3) cold rolling for the third time: rolling the semi-finished product of the battery foil obtained in the step (6) into a finished product of the battery foil by a cold rolling mill, spraying rolling oil containing an alcohol ester additive onto the finished product of the battery foil by a rolling oil spray head in the rolling process, wherein the acid value of the oil product of the rolling oil is controlled to be 0.20-0.30KOH/g, the alcohol content in the alcohol ester additive accounts for 3-4%, and the ester content accounts for 1.5-2.5%
In this example, the temperature in the melting furnace in step (1) should not be lower than 720 ℃.
In this embodiment, the temperature of the molten aluminum alloy is not lower than 690 ℃ during refining and slagging-off in step (2).
In this example, the 1060 alloy battery foil blank in step (3) had a thickness of 6.8mm and the 1235D alloy battery foil blank had a thickness of 7.0 mm.
In this example, the acid value of the rolling oil in step (4) is 0.3KOH/g, the alcohol content and the ester content in the alcohol ester additive are 8% respectively, and the ester content is 2%.
In this example, the acid value of the rolling oil in step (6) is 0.25KOH/g, the alcohol content and the ester content in the alcohol ester additive are 7.5% respectively, and the ester content is 1.5%.
In this example, the acid value of the rolling oil in step (7) is 0.25KOH/g, the alcohol content and the ester content in the alcohol ester additive are 3% respectively, and the ester content is 1.5%.
The control method ensures that the oil film strength of the surface of the battery foil is not broken in the cold rolling process by controlling the oil acidity of the rolling oil and the alcohol and ester content in the alcohol ester additive in the three-time cold rolling process, so that the rolling oil in the normal rolling process can adsorb and roll aluminum powder in a polar manner, and simultaneously ensures the uniformity of the grain structure of the surface of the battery foil through the annealing treatment between the first cold rolling and the second cold rolling, so that the aluminum powder on the surface of the battery foil is easier to fall off.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A control method for reducing aluminum powder on the surface of a battery foil is characterized by comprising the following steps:
(1) smelting: adding solid materials into a smelting furnace, raising the temperature of the smelting furnace to 740 ℃, and uniformly stirring to obtain an aluminum alloy solution, wherein the solid materials are pure aluminum ingots, intermediate alloys and other metal additives, and the aluminum alloy solution is 1060 alloy melt or 1235D alloy solution;
(2) refining and degassing: adding a refining agent into the molten aluminum alloy obtained in the step (1) for refining and slagging off, and degassing and filtering the molten aluminum alloy by using a degassing device after the slagging off process is finished to obtain casting aluminum liquid;
(3) casting and rolling: continuously casting the cast aluminum liquid obtained in the step (2) into a battery foil blank through a continuous casting machine, wherein the battery foil blank is a 1060 alloy battery foil blank or a 1235D alloy battery foil blank, the thickness of the 1060 alloy battery foil blank is controlled to be 6.8 +/-0.2 mm, and the thickness of the 1235D alloy battery foil blank is controlled to be 7.0 +/-0.2 mm;
(4) first cold rolling: rolling the battery foil blank obtained in the step (3) into a battery foil preform through a cold rolling mill, spraying rolling oil containing an alcohol ester additive onto the battery foil preform through a rolling oil spray head in the rolling process, wherein the oil acid value of the rolling oil is controlled to be 0.22-0.32KOH/g, the alcohol content in the alcohol ester additive accounts for 7.5-8.5%, and the ester content accounts for 1.5-2.5%;
(5) annealing treatment: annealing the battery foil preform obtained in the step (4), wherein the battery foil preform is 1060 alloy battery foil preform or 1235D alloy battery foil preform, and the annealing temperature of the 1060 alloy battery foil preform is 420 ℃, and the annealing temperature of the 1235D alloy battery foil preform is 525 ℃;
(6) and (3) second cold rolling: rolling the annealed battery foil preform into a battery foil semi-finished product by using a cold rolling mill, spraying rolling oil containing an alcohol ester additive onto the battery foil semi-finished product by using a rolling oil spray head in the rolling process, wherein the acid value of an oil product of the rolling oil is controlled to be 0.20-0.30KOH/g, the alcohol content in the alcohol ester additive accounts for 7.5-8.5%, and the ester content accounts for 1.5-2.5%;
(7) and (3) cold rolling for the third time: rolling the semi-finished product of the battery foil obtained in the step (6) into a finished product of the battery foil by a cold rolling mill, spraying rolling oil containing an alcohol ester additive onto the finished product of the battery foil by a rolling oil spray head in the rolling process, wherein the acid value of an oil product of the rolling oil is controlled to be 0.20-0.30KOH/g, the alcohol content in the alcohol ester additive accounts for 3-4%, and the ester content accounts for 1.5-2.5%.
2. The method as claimed in claim 1, wherein the temperature in the smelting furnace in step (1) is not lower than 720 ℃.
3. The method for controlling the lightening of aluminum powder on the surface of battery foil as claimed in claim 1, wherein the temperature of the molten aluminum alloy during refining and slagging-off in step (2) is not lower than 690 ℃.
4. The method as claimed in claim 1, wherein the 1060 alloy battery foil blank has a thickness of 6.8mm and the 1235D alloy battery foil blank has a thickness of 7.0mm in step (3).
5. The method for controlling the lightening of aluminum powder on the surface of battery foil according to claim 1, wherein the oil acid value of the rolling oil in the step (4) is 0.3KOH/g, the alcohol content and the ester content in the alcohol ester additive are respectively 8%, and the ester content is 2%.
6. The method for controlling the lightening of aluminum powder on the surface of battery foil according to claim 1, wherein the oil acid value of the rolling oil in the step (6) is 0.25KOH/g, the ratio of the alcohol content to the ester content in the alcohol ester additive is 7.5%, and the ratio of the ester content is 1.5%.
7. The method for controlling the lightening of aluminum powder on the surface of battery foil according to claim 1, wherein the oil acid value of the rolling oil in the step (7) is 0.25KOH/g, the ratio of the alcohol content to the ester content in the alcohol ester additive is 3%, and the ratio of the ester content is 1.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110588604.2A CN113369304A (en) | 2021-05-28 | 2021-05-28 | Control method for reducing aluminum powder on surface of battery foil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110588604.2A CN113369304A (en) | 2021-05-28 | 2021-05-28 | Control method for reducing aluminum powder on surface of battery foil |
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| CN113369304A true CN113369304A (en) | 2021-09-10 |
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| CN202110588604.2A Pending CN113369304A (en) | 2021-05-28 | 2021-05-28 | Control method for reducing aluminum powder on surface of battery foil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453417A (en) * | 2022-03-04 | 2022-05-10 | 内蒙古联晟新能源材料有限公司 | Method for reducing aluminum powder on surface of 1235AH14 double-zero foil in rolling process |
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