CN114855226A - Copper foil warping degree on-line monitoring method - Google Patents
Copper foil warping degree on-line monitoring method Download PDFInfo
- Publication number
- CN114855226A CN114855226A CN202210237871.XA CN202210237871A CN114855226A CN 114855226 A CN114855226 A CN 114855226A CN 202210237871 A CN202210237871 A CN 202210237871A CN 114855226 A CN114855226 A CN 114855226A
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- China
- Prior art keywords
- copper foil
- warping degree
- roller
- infrared
- monitoring method
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000011889 copper foil Substances 0.000 title claims abstract description 79
- 238000012544 monitoring process Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012806 monitoring device Methods 0.000 claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 9
- 238000007747 plating Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 230000003064 anti-oxidating effect Effects 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims abstract description 4
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 3
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000009966 trimming Methods 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 13
- 229910052744 lithium Inorganic materials 0.000 abstract description 13
- 239000000654 additive Substances 0.000 abstract description 6
- 230000000996 additive effect Effects 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 5
- 238000007639 printing Methods 0.000 abstract description 5
- 238000009713 electroplating Methods 0.000 abstract description 4
- 238000005498 polishing Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011267 electrode slurry Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal 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
- 230000003746 surface roughness Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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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)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention discloses an online monitoring method for copper foil warping degree, which comprises the following steps: s1, stripping the copper foil prepared by electrolysis from the cathode roller; s2, sequentially passing the copper foil through a front tension roller for tensioning tension, a submerged roller for plating an anti-oxidation layer, a liquid upper roller for transition, a rear tension roller for tensioning tension again and an edge cutting roller for edge cutting, and then passing through a warping degree monitoring device; s3, acquiring a warping degree value of the copper foil through a warping degree monitoring device; and S4 copper foil is wound through a winding roller. The monitoring method can solve the problem that the accuracy and timeliness of judgment of a traditional manual monitoring mode are poor, so that the purposes of collecting warping degree values on line, accurately monitoring the warping degree condition of the copper foil in real time, adjusting the electroplating additive or polishing the cathode roller according to the monitored warping degree condition, effectively improving poor warping degree of the copper foil, improving folding, yellow printing and roll loosening of the electrolytic copper foil caused by the warping degree, and improving edge collapse and poor folding of a lithium battery cell preparation end are achieved.
Description
Technical Field
The invention relates to the technical field of electrolytic copper foil, in particular to an online monitoring method for copper foil warping degree.
Background
From the distribution of the industrial chain of the lithium electrolytic copper foil, the lithium electrolytic copper foil is mainly used for a negative current collector of a lithium battery, and the lithium battery is mainly used for a new energy automobile power battery, a 3C digital code and an energy storage system. As the demand of power batteries continues to increase, the global yield of lithium electro-copper foil is also on an increasing trend year by year. The simplest lithium ion battery consists of a positive electrode, a negative electrode, a diaphragm, electrolyte and positive and negative current collectors. The metal foil (copper foil and aluminum foil) is a main material of the lithium ion battery, and has the function of collecting current generated by active substances of the battery so as to form larger current output. In the production process of the lithium battery, the negative electrode slurry is usually coated on a lithium battery copper foil, and then the processes of drying, rolling, slitting and the like are carried out, so that a negative electrode plate of the lithium battery is obtained.
The production process, the cost and the performance of the final product of the lithium battery cell are closely related to the tensile strength, the ductility, the warping degree, the surface roughness, the thickness uniformity, the appearance quality and other factors 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 quality 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 copper foil, the thinner the copper foil is, the more obvious the internal force of the grain structure is, the more easily the copper foil is curled, i.e. the warping degree is high. The higher the warping degree of the copper foil is, the abnormal problems of folding, yellow printing, slitting, rolling, loosening and the like of the foil surface can be caused for the electrolytic green foil, and the problems of edge collapse, folding, coating influence and the like can be caused for the preparation of the battery cell.
In the case of the electrolytic copper foil, the warpage is related to poor plating at the edge of the cathode roll during electrolytic foil formation, and excessive or insufficient plating additives. When the copper foil is electrodeposited, if the amount of the plating additive is controlled for the warping, the edge of the cathode roll can be polished to improve the warping. However, the traditional warp monitoring mode only depends on the visual observation and estimation of an operator, so that the accuracy and timeliness of judgment are poor.
In order to solve the problems in the technology, by adopting the scheme of the invention, after the copper foil is prepared, the warping degree monitoring device is additionally arranged at the winding end, so that the warping degree condition of the copper foil can be detected accurately in real time, the electroplating additive is adjusted in time according to the detected warping degree, or the cathode roller is polished, and the poor warping degree of the copper foil can be effectively improved. The defects of folding, yellow printing, roll loosening and the like caused by warping degree of the electrolytic copper foil are improved, and the defects of edge collapse and folding of the preparation end of the lithium battery cell are improved.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides an online monitoring method for the warping degree of a 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:
an on-line monitoring method for the warping degree of a copper foil comprises the following steps:
s1, stripping the copper foil prepared by electrolysis from the cathode roller through a stripping roller;
s2, sequentially passing the copper foil through a front tension roller for tensioning tension, a submerged roller for plating an anti-oxidation layer, a liquid upper roller for transition, a rear tension roller for tensioning tension again and an edge cutting roller for edge cutting, and then passing through a warping degree monitoring device;
s3, acquiring a warping degree value of the copper foil through a warping degree monitoring device, and feeding the warping degree value back to a computer end;
s4, winding the copper foil through a winding roller;
the warping degree monitoring devices includes infrared generator, infrared receiver, signal sensor, both ends about copper foil rolling position are installed respectively to infrared generator, infrared receiver, signal sensor with infrared receiver is in same end, the last infrared ray emission point that is equipped with a plurality of vertical distributions of infrared generator, the last infrared ray receiving point that is equipped with a plurality of vertical distributions of infrared receiver is a plurality of the infrared ray that sends of infrared ray emission point all is parallel with the copper foil surface, the copper foil is placed in many between the infrared ray, the quantity that is sheltered from infrared ray through signal sensor collection obtains warping degree numerical value.
Further, when the copper foil passes through the edge cutting roller in the step S2, 10-20mm of edge material of the edge of the copper foil is cut off by a cutter.
Further, the number of the infrared rays is 10-30, and the distance between every two adjacent infrared rays is 1-2 mm.
Furthermore, the interval time for acquiring the warpage value by the signal sensor is 1 minute.
The invention has the beneficial effects that: the method for monitoring the warping degree of the copper foil on line can solve the problem that the accuracy and timeliness of judgment of a traditional manual monitoring mode are poor, so that the purposes of collecting warping degree values on line, accurately monitoring the warping degree condition of the copper foil in real time, adjusting an electroplating additive or polishing a cathode roller according to the monitored warping degree condition in time, effectively improving poor warping degree of the copper foil, improving folding, yellow printing and curling loosening of an electrolytic copper foil caused by the warping degree, and improving edge collapse and poor folding of a lithium battery cell preparation end are achieved.
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 schematic view of an apparatus for an online monitoring method of copper foil warpage according to an embodiment of the present invention;
fig. 2 is a schematic view of the working principle of a warp monitoring device of the copper foil warp online monitoring method according to the embodiment of the invention;
fig. 3 is a schematic structural diagram of a warp monitoring device of the copper foil warp online monitoring method according to an embodiment of the present invention;
in the figure: 1. the device comprises a cathode roller, 2, copper foil, 3, a stripping roller, 4, a front tension roller, 5, a submerged roller, 6, an upper liquid roller, 7, a rear tension roller, 8, a trimming roller, 9, a winding roller, 10, a warping degree monitoring device, 101, an infrared generator, 102, an infrared receiver, 103, a signal sensor, 104, infrared rays, 105, an infrared ray emission point, 106 and an infrared ray receiving point.
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, which can be derived from the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
As shown in fig. 1 to 3, the method for online monitoring the warpage of a copper foil according to an embodiment of the present invention includes the following steps:
s1 peeling the electrolytically prepared copper foil 2 from the cathode roll 1 by the peeling roll 3;
s2, sequentially passing the copper foil 2 through a front tension roller 4 for tensioning, a submerged roller 5 for plating an anti-oxidation layer, a liquid upper roller 6 for transition, a rear tension roller 7 for tensioning again, and an edge cutting roller 8 for edge cutting, and then passing through a warping degree monitoring device 10;
s3, acquiring a warping degree value of the copper foil 2 through the warping degree monitoring device 10, and feeding the warping degree value back to a computer end;
s4, winding the copper foil through a winding roller 9;
In the above S2, when the copper foil 2 passes through the edge slitting roller 8, the 10 to 20mm edge margins of the copper foil 2 are cut off by the cutter.
The number of the infrared rays 104 is 10-30, and the distance between adjacent infrared rays 104 is 1-2mm, and the distance can be set according to the monitoring precision requirement.
The interval time for the signal sensor 103 to acquire the warpage value is 1 minute, and can be set according to the monitoring requirement.
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 copper foil is warped in specific use, a plurality of infrared rays 104 emitted by the infrared ray emitting points 105 are shielded, so that the infrared receiver 102 cannot receive the infrared rays 104, the signal sensor 103 collects the quantity of the infrared rays 104 which cannot be received, the warping degree value of the copper foil can be obtained by combining the distance between the adjacent infrared rays 104, and the warping degree value is fed back to a computer monitor.
In conclusion, by means of the technical scheme, the problem that the traditional manual monitoring mode is poor in judgment accuracy and timeliness can be solved, and therefore the purposes of collecting warping degree values on line, monitoring the warping degree condition of the copper foil accurately in real time, adjusting the electroplating additive or polishing the cathode roller according to the monitored warping degree condition in time, effectively improving poor warping degree of the copper foil, improving folding, yellow printing and roll loosening of the electrolytic copper foil caused by the warping degree, and improving edge collapse and poor folding of the preparation end of the lithium battery cell are achieved.
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. An on-line monitoring method for the warping degree of a copper foil is characterized by comprising the following steps:
s1, stripping the copper foil (2) prepared by electrolysis from the cathode roller (1) through a stripping roller (3);
s2, sequentially passing the copper foil (2) through a front tension roller (4) for tensioning tension, a liquid lower roller (5) for plating an anti-oxidation layer, a liquid upper roller (6) for transition, a rear tension roller (7) for tensioning tension again, and a trimming roller (8) for trimming, and then passing through a warping degree monitoring device (10);
s3, acquiring a warping degree value of the copper foil (2) through a warping degree monitoring device (10), and feeding the warping degree value back to a computer end;
s4, winding the copper foil through a winding roller (9);
the warpage monitoring device (10) comprises an infrared generator (101), an infrared receiver (102) and a signal sensor (103), the infrared generator (101) and the infrared receiver (102) are respectively arranged at the left end and the right end of the copper foil rolling position, the signal sensor (103) and the infrared receiver (102) are arranged at the same end, a plurality of vertically distributed infrared ray emission points (105) are arranged on the infrared generator (101), a plurality of infrared ray receiving points (106) which are vertically distributed are arranged on the infrared receiver (102), infrared rays (104) emitted by the infrared ray emitting points (105) are all parallel to the surface of the copper foil (2), the copper foil (2) is placed between a plurality of infrared rays (104), the signal sensor (103) collects the quantity of the shielded infrared rays (104) to obtain a warping degree value.
2. The on-line monitoring method according to claim 1, wherein 10-20mm of the edge of the copper foil (2) is cut off by a cutting knife when the copper foil (2) passes through the edge cutting roll (8) in the S2.
3. An on-line monitoring method according to claim 3, characterized in that the number of said infrared rays (104) is 10-30 and the distance between adjacent infrared rays (104) is 1-2 mm.
4. An on-line monitoring method as claimed in claim 3, wherein the signal sensor (103) collects the warpage value at an interval of 1 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210237871.XA CN114855226B (en) | 2022-03-11 | 2022-03-11 | Copper foil warpage online monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210237871.XA CN114855226B (en) | 2022-03-11 | 2022-03-11 | Copper foil warpage online monitoring method |
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| Publication Number | Publication Date |
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| CN114855226A true CN114855226A (en) | 2022-08-05 |
| CN114855226B CN114855226B (en) | 2024-05-10 |
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| CN202210237871.XA Active CN114855226B (en) | 2022-03-11 | 2022-03-11 | Copper foil warpage online monitoring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116140231A (en) * | 2023-04-21 | 2023-05-23 | 广东捷盟智能装备有限公司 | Detection system, method and device based on metal foil edge collapse |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0376887A1 (en) * | 1988-12-30 | 1990-07-04 | Alusuisse-Lonza Services Ag | Method and device for controlling the flatness of cold-rolled metal strip |
| JP2003075131A (en) * | 2001-09-06 | 2003-03-12 | Tosoku Kogyo Kk | Warp detection device of rotor |
| CN110645902A (en) * | 2019-10-17 | 2020-01-03 | 武汉大学 | Online monitoring method and device for warpage deformation and defects of packaging module |
| CN110926403A (en) * | 2019-11-28 | 2020-03-27 | 九江德福科技股份有限公司 | Cathode roller roughness testing method |
| CN111020645A (en) * | 2020-01-14 | 2020-04-17 | 广东嘉元科技股份有限公司 | Electrolytic copper foil forming machine, online monitoring method and control device |
| CN215766921U (en) * | 2021-09-26 | 2022-02-08 | 铜陵汇利丰科电子材料有限公司 | Electrolytic copper foil warp degree measuring device |
-
2022
- 2022-03-11 CN CN202210237871.XA patent/CN114855226B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0376887A1 (en) * | 1988-12-30 | 1990-07-04 | Alusuisse-Lonza Services Ag | Method and device for controlling the flatness of cold-rolled metal strip |
| JP2003075131A (en) * | 2001-09-06 | 2003-03-12 | Tosoku Kogyo Kk | Warp detection device of rotor |
| CN110645902A (en) * | 2019-10-17 | 2020-01-03 | 武汉大学 | Online monitoring method and device for warpage deformation and defects of packaging module |
| CN110926403A (en) * | 2019-11-28 | 2020-03-27 | 九江德福科技股份有限公司 | Cathode roller roughness testing method |
| CN111020645A (en) * | 2020-01-14 | 2020-04-17 | 广东嘉元科技股份有限公司 | Electrolytic copper foil forming machine, online monitoring method and control device |
| CN215766921U (en) * | 2021-09-26 | 2022-02-08 | 铜陵汇利丰科电子材料有限公司 | Electrolytic copper foil warp degree measuring device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116140231A (en) * | 2023-04-21 | 2023-05-23 | 广东捷盟智能装备有限公司 | Detection system, method and device based on metal foil edge collapse |
| CN116140231B (en) * | 2023-04-21 | 2023-08-08 | 广东捷盟智能装备有限公司 | Detection system, method and device based on metal foil edge collapse |
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| CN114855226B (en) | 2024-05-10 |
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