CN114214672A - Method for controlling copper dissolution rate in lithium electrolytic copper foil liquid preparation process - Google Patents
Method for controlling copper dissolution rate in lithium electrolytic copper foil liquid preparation process Download PDFInfo
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- CN114214672A CN114214672A CN202111546107.2A CN202111546107A CN114214672A CN 114214672 A CN114214672 A CN 114214672A CN 202111546107 A CN202111546107 A CN 202111546107A CN 114214672 A CN114214672 A CN 114214672A
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- copper
- rate
- foil
- dissolving tank
- ions
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 239000010949 copper Substances 0.000 title claims abstract description 93
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 93
- 239000011889 copper foil Substances 0.000 title claims abstract description 56
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 27
- 238000004090 dissolution Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 18
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910001431 copper ion Inorganic materials 0.000 claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 229910000365 copper sulfate Inorganic materials 0.000 claims abstract description 6
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 239000011888 foil Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000000704 physical effect Effects 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000000047 product Substances 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
- 239000012467 final product Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a control method of a copper dissolving rate in a lithium electrolytic copper foil liquid preparation process, which comprises the following steps: s1, calculating the consumption rate of copper ions; s2 copper wire dissolution preparation work; s3 controls various factors affecting the rate of copper dissolution according to the rate of consumption of copper ions. The control method can solve the problem that the copper dissolution rate is too high or too low in the liquid preparation process of the lithium electrolytic copper foil to influence the quality of the copper foil, so that the copper dissolution rate in the liquid preparation process of the lithium electrolytic copper foil is reasonably controlled by calculating the consumption rate of copper ions in the production process of the lithium electrolytic copper foil, the concentration of copper in a copper dissolution tank is more stable, copper sulfate solution accumulation waste caused by too high copper dissolution rate in the liquid preparation process in the copper dissolution process is reduced, the instability of the appearance or physical properties of a product caused by insufficient copper dissolution rate is reduced, and the quality of the produced copper foil is improved.
Description
Technical Field
The invention relates to the technical field of electrolytic copper foil preparation, in particular to a method for controlling the copper dissolution rate in a liquid preparation process of a lithium electrolytic copper foil.
Background
The production process, the cost and the performance of the final product of the lithium battery are closely related to the factors such as the tensile strength, the ductility, the surface roughness, the thickness uniformity, the appearance quality and the like of the copper foil. In general, in hybrid and pure electric vehicles, pure electric vehicles are equipped with more battery units, and the weight of copper foil can reach more than 10Kg, so that the weight of copper foil on the battery can be reduced, on one hand, the cost of raw materials using the copper foil can be effectively reduced, and on the other hand, under the condition that the battery capacity is not changed, the weight of a single battery can be effectively reduced by using lighter copper foil, so that the energy density of the battery is improved. At present, the mainstream way for reducing the weight of the copper foil in the market is to reduce the thickness of the copper foil, so that the thinning of the copper foil becomes a main development trend along with the improvement of the requirements of the electric automobile on the cruising ability and the battery capacity density.
Due to the trend of thinning and thinning of the copper foil, the copper foil is required to have higher ductility and tensile strength, and the stability of copper supplement is determined by analyzing the stability of the copper dissolving rate in a copper dissolving tank through the production process of the electrolytic copper foil, so that the copper foil has certain physical properties.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a method for controlling the copper dissolution rate in the liquid preparation process of a lithium electrolytic copper foil, which can overcome the defects in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
a method for controlling the copper dissolution rate in the liquid preparation process of a lithium electrolytic copper foil is characterized by comprising the following steps:
s1 calculates the consumption rate of copper ions: calculating the consumption rate of copper ions in the production process of the lithium electrolytic copper foil according to the number of the foil generating machines and the maximum starting current of each foil generating machine;
s2 copper wire dissolution preparation: adding a TU1 copper wire meeting the purity requirement into a copper dissolving tank containing sulfuric acid, blowing air by using a screw fan, controlling the reaction temperature by steam heating, and spraying the dissolved copper sulfate solution into the copper wire under the action of a stirring pump of the copper dissolving tank so as to gradually dissolve the copper wire;
s3 controls various factors affecting the rate of dissolved copper according to the rate of consumption of copper ions: according to the consumption rate of copper ions in the production process of the lithium electro-copper foil, the reaction temperature of copper wires in the copper dissolving tank, the frequency of a stirring pump of the copper dissolving tank, the speed of air blowing by a screw fan and the concentration of sulfuric acid in the copper dissolving tank are controlled to control the copper dissolving rate in the copper dissolving tank, so that the copper dissolving rate in the copper dissolving tank is the same as the consumption rate of the copper ions in the production process of the electro-copper foil, and the concentration of the copper ions in the low-level tank A, the low-level tank B and the clean liquid tank is dynamically balanced.
Further, the volume of the copper dissolving tank is 24 cubic meters.
Furthermore, 4 raw foil machines are used in the production process of the electro-copper foil, the maximum starting current of each raw foil machine is 45kA, the consumption rate of copper ions is 3.6kg/min, the reaction temperature of copper wires in the copper dissolving tank is 70-75 ℃, the frequency of a stirring pump of the copper dissolving tank is 45-46Hz, the air blowing speed of a screw fan is 3-3.5m/s, and the sulfuric acid concentration in the copper dissolving tank is 80-85 g/L.
Further, the consumption rate of copper ions in the production process of the electro-copper foil is 3.6-3.65 kg/min.
The invention has the beneficial effects that: the method for controlling the copper dissolving rate in the liquid preparation process of the lithium electrolytic copper foil can solve the problem that the copper dissolving rate is too high or too low in the liquid preparation process of the lithium electrolytic copper foil and the quality of the copper foil is affected, so that the copper dissolving rate in the liquid preparation process of the lithium electrolytic copper foil is reasonably controlled by calculating the consumption rate of copper ions in the production process of the lithium electrolytic copper foil, the concentration of copper in a copper dissolving tank is more stable, the waste of copper sulfate solution accumulation caused by too high copper dissolving rate in the liquid preparation process in the copper dissolving process is reduced, the instability of the appearance or physical properties of a product caused by insufficient copper dissolving rate is reduced, and the quality of the produced copper foil is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a process schematic diagram of a method for controlling a copper dissolution rate in a lithium electro-copper foil liquid preparation process according to an embodiment of the invention;
in the figure: 1. the device comprises a foil forming machine, 2, a copper dissolving tank, 3, a copper dissolving tank stirring pump, 4, a screw fan, 5, low-level tanks A and 6, low-level tanks B and 7 and a liquid purifying tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in fig. 1, the method for controlling a copper dissolution rate in a lithium electro-copper foil liquid preparation process according to an embodiment of the invention includes the following steps:
s1 calculates the consumption rate of copper ions: calculating the consumption rate of copper ions in the production process of the lithium electrolytic copper foil according to the number of the foil generating machines 1 and the maximum starting current of each foil generating machine 1;
s2 copper wire dissolution preparation: adding a TU1 copper wire meeting the purity requirement into a copper dissolving tank 2 containing sulfuric acid, blowing air by using a screw fan 4, controlling the reaction temperature by steam heating, and splashing the dissolved copper sulfate solution into the copper wire under the action of a stirring pump 3 of the copper dissolving tank so as to gradually dissolve the copper wire;
s3 controls various factors affecting the rate of dissolved copper according to the rate of consumption of copper ions: according to the consumption rate of copper ions in the production process of the lithium electro-copper foil, the reaction temperature of copper wires in the copper dissolving tank 2, the frequency of a stirring pump 3 of the copper dissolving tank, the speed of air blowing by a screw fan 4 and the concentration of sulfuric acid in the copper dissolving tank 2 are controlled to control the copper dissolving rate in the copper dissolving tank 2, so that the copper dissolving rate in the copper dissolving tank 2 is the same as the consumption rate of the copper ions in the production process of the electro-copper foil, and the concentrations of the copper ions in the low-position tank A5, the low-position tank B6 and the clean liquid tank 7 are dynamically balanced.
The volume of the copper dissolving tank 2 is 24 cubic meters.
The number of the raw foil machines 1 in the production process of the electro-copper foil is 4, the maximum starting current of each raw foil machine 1 is 45kA, the consumption rate of copper ions is 3.6kg/min, the reaction temperature of copper wires in the copper dissolving tank 2 is 70-75 ℃, the frequency of the stirring pump 3 of the copper dissolving tank is 45-46Hz, the air blowing speed of the screw fan 4 is 3-3.5m/s, and the sulfuric acid concentration in the copper dissolving tank 2 is 80-85 g/L.
The consumption rate of copper ions in the production process of the electro-copper foil is 3.6-3.65 kg/min.
In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.
When the device is used specifically, the consumption rate of copper ions in the production process of the lithium electro-copper foil is calculated according to the number of the raw foil machines 1 and the maximum starting current of each raw foil machine 1, and then the reaction temperature of copper wires in the copper dissolving tank 2, the frequency of the stirring pump 3 of the copper dissolving tank, the air blowing speed of the screw fan 4 and the sulfuric acid concentration in the copper dissolving tank 2 are controlled to control the copper dissolving rate in the copper dissolving tank 2, so that the copper dissolving rate in the copper dissolving tank 2 is the same as the consumption rate of the copper ions in the production process of the electro-copper foil, the concentrations of the copper ions in the low-level tank A5, the low-level tank B6 and the clean liquid tank 7 are dynamically balanced, and the quality of the produced copper foil is improved.
In conclusion, by means of the technical scheme, the problem that the copper foil quality is affected due to the fact that the copper dissolution rate is too large or too small in the liquid preparation process of the lithium electrolytic copper foil can be solved, so that the copper concentration in the copper dissolution tank is more stable by calculating the consumption rate of copper ions in the production process of the lithium electrolytic copper foil and reasonably controlling the copper dissolution rate in the liquid preparation process of the lithium electrolytic copper foil, copper sulfate solution accumulation waste caused by the fact that the copper dissolution rate is too large in the liquid preparation working section in the copper dissolution process is reduced, instability of the appearance or physical properties of a product caused by insufficient copper dissolution rate is reduced, and the quality of the produced copper foil is improved.
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 (4)
1. A method for controlling the copper dissolution rate in the liquid preparation process of a lithium electrolytic copper foil is characterized by comprising the following steps:
s1 calculates the consumption rate of copper ions: calculating the consumption rate of copper ions in the production process of the lithium electrolytic copper foil according to the number of the foil generating machines (1) and the maximum starting current of each foil generating machine (1);
s2 copper wire dissolution preparation: adding a TU1 copper wire meeting the purity requirement into a copper dissolving tank (2) containing sulfuric acid, blowing air by using a screw fan (4), controlling the reaction temperature by steam heating, and splashing the dissolved copper sulfate solution into the copper wire under the action of a stirring pump (3) of the copper dissolving tank so as to gradually dissolve the copper wire;
s3 controls various factors affecting the rate of dissolved copper according to the rate of consumption of copper ions: according to the consumption rate of copper ions in the production process of the lithium electrolytic copper foil, the reaction temperature of copper wires in the copper dissolving tank (2), the frequency of a stirring pump (3) of the copper dissolving tank, the speed of air blowing by a screw fan (4) and the concentration of sulfuric acid in the copper dissolving tank (2) are controlled to control the copper dissolving rate in the copper dissolving tank (2), so that the copper dissolving rate in the copper dissolving tank (2) is the same as the consumption rate of the copper ions in the production process of the electrolytic copper foil, and the concentration of the copper ions in a low-level tank A (5), a low-level tank B (6) and a clean liquid tank (7) is dynamically balanced.
2. A control method according to claim 1, characterized in that the volume of the copper dissolving tank (2) is 24 cubic meters.
3. The control method according to claim 1, wherein 4 raw foil machines (1) are used in the production process of the electro-copper foil, the maximum starting current of each raw foil machine (1) is 45kA, the consumption rate of copper ions is 3.6kg/min, the reaction temperature of copper wires in the copper dissolving tank (2) is 70-75 ℃, the frequency of the stirring pump (3) of the copper dissolving tank is 45-46Hz, the air blowing speed of the screw fan (4) is 3-3.5m/s, and the sulfuric acid concentration in the copper dissolving tank (2) is 80-85 g/L.
4. The method of claim 3, wherein the rate of consumption of copper ions during the production of the electro-copper foil is 3.6-3.65 kg/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546107.2A CN114214672A (en) | 2021-12-16 | 2021-12-16 | Method for controlling copper dissolution rate in lithium electrolytic copper foil liquid preparation process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111546107.2A CN114214672A (en) | 2021-12-16 | 2021-12-16 | Method for controlling copper dissolution rate in lithium electrolytic copper foil liquid preparation process |
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| CN114214672A true CN114214672A (en) | 2022-03-22 |
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| CN202111546107.2A Pending CN114214672A (en) | 2021-12-16 | 2021-12-16 | Method for controlling copper dissolution rate in lithium electrolytic copper foil liquid preparation process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114990642A (en) * | 2022-06-15 | 2022-09-02 | 云南润久科技有限公司 | Electrolyte rapid liquid making method and circulating system in electrolytic copper foil production |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008016541A1 (en) * | 2006-07-31 | 2008-02-07 | Wayne Charles Walker | Constituent maintenance of a copper sulfate bath through chemical dissolution of copper metal |
| CN107287650A (en) * | 2017-08-14 | 2017-10-24 | 江东电子材料有限公司 | A kind of electrolyte automatic regulating system and adjusting method |
| CN210826397U (en) * | 2020-04-15 | 2020-06-23 | 甘肃德福新材料有限公司 | Electrolytic foil-generating ion concentration stable control system |
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2021
- 2021-12-16 CN CN202111546107.2A patent/CN114214672A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008016541A1 (en) * | 2006-07-31 | 2008-02-07 | Wayne Charles Walker | Constituent maintenance of a copper sulfate bath through chemical dissolution of copper metal |
| CN107287650A (en) * | 2017-08-14 | 2017-10-24 | 江东电子材料有限公司 | A kind of electrolyte automatic regulating system and adjusting method |
| CN210826397U (en) * | 2020-04-15 | 2020-06-23 | 甘肃德福新材料有限公司 | Electrolytic foil-generating ion concentration stable control system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114990642A (en) * | 2022-06-15 | 2022-09-02 | 云南润久科技有限公司 | Electrolyte rapid liquid making method and circulating system in electrolytic copper foil production |
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