CN114855226B - Copper foil warpage online monitoring method - Google Patents
Copper foil warpage online monitoring method Download PDFInfo
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- CN114855226B CN114855226B CN202210237871.XA CN202210237871A CN114855226B CN 114855226 B CN114855226 B CN 114855226B CN 202210237871 A CN202210237871 A CN 202210237871A CN 114855226 B CN114855226 B CN 114855226B
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- China
- Prior art keywords
- copper foil
- roller
- warpage
- infrared
- monitoring method
- Prior art date
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000011889 copper foil Substances 0.000 title claims abstract description 85
- 238000012544 monitoring process Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012806 monitoring device Methods 0.000 claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 238000009966 trimming Methods 0.000 claims abstract description 8
- 238000007747 plating Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052744 lithium Inorganic materials 0.000 abstract description 12
- 238000004804 winding Methods 0.000 abstract description 7
- 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
- 238000009713 electroplating Methods 0.000 abstract description 4
- 238000000227 grinding Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000011888 foil Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 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
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009826 distribution 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
- 239000000463 material 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
- 238000005498 polishing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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
Landscapes
- 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 the warpage of a copper foil, which comprises the following steps: s1, stripping the electrolytically prepared copper foil from a cathode roller; s2, sequentially tensioning the copper foil through a front tension roller, plating an oxidation preventing layer on a submerged roller, transiting a submerged roller, tensioning the copper foil again through a rear tension roller, trimming the copper foil through a warping degree monitoring device; s3, acquiring a warp degree value of the copper foil through a warp degree monitoring device; s4, winding the copper foil through a winding roller. The monitoring method can solve the problem of poor accuracy and timeliness of traditional manual monitoring mode judgment, thereby achieving the purposes of collecting the warpage value on line, monitoring the warpage condition of the copper foil accurately in real time, adjusting the electroplating additive or grinding the cathode roller in time according to the monitored warpage condition, effectively improving the poor warpage of the copper foil, improving the folding, huang Yin and rolling loose of the electrolytic copper foil caused by the warpage, and improving the edge collapse and poor folding of the preparation end of the lithium battery cell.
Description
Technical Field
The invention relates to the technical field of electrolytic copper foil, in particular to an online monitoring method for the warping degree of a copper foil.
Background
From the industrial chain distribution of the lithium electric copper foil, the lithium electric 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 for power cells continues to increase, global lithium-ion copper foil production is also growing 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 battery active substances so as to form larger current output, and the copper foil becomes the first choice of the negative current collector of the lithium ion battery due to the characteristics of strong conductivity, soft texture, mature manufacturing process, high cost performance, relatively low price and the like. In the production process of the lithium battery, the negative electrode slurry is generally coated on a lithium battery copper foil, and then the negative electrode plate of the lithium battery is obtained through the procedures of drying, rolling, slitting and the like.
The production process, cost and performance of the final product of the lithium battery cell are closely related to factors such as tensile strength, ductility, warpage, surface roughness, thickness uniformity, appearance quality and the like of the copper foil. In general, in hybrid power and pure electric vehicles, the pure electric vehicles are equipped with more battery units, and the weight of the copper foil is only used to reach more than 10Kg, so that the quality of the copper foil on the battery can be reduced, on one hand, the raw material cost of the copper foil can be effectively reduced, and on the other hand, under the condition of unchanged battery capacity, the quality of the single battery can be effectively reduced by using lighter copper foil, and the energy density of the battery can be improved. At present, the main current way of reducing the quality of the copper foil in the market is to reduce the thickness of the copper foil, so along with the improvement of the requirements of the electric automobile on the endurance capacity and the battery capacity density, the thinning of the copper foil becomes a main development trend.
Because of the trend of thinning, the thinner the copper foil, the more obvious the internal force is applied to the grain structure, and the more easily the copper foil is curled, i.e. the higher the warpage. The higher the warpage of the copper foil, the abnormal problems of folding, huang Yin, slitting, rolling and loosening of the foil surface can be caused for electrolytic green foil, and the problems of edge collapse, folding, coating influence and the like can be caused for cell preparation.
In the case of electrolytic copper foil, warpage is associated with poor plating of the edge of the cathode roll at the time of electrolytic foil production, on the one hand, and excessive or insufficient plating additives, on the other hand. In the case of electrolytic copper foil, if warpage is found by controlling the amount of plating additive, the edge of the cathode roll can be improved by polishing. However, the traditional warp monitoring mode can only rely on naked eyes of operators for observation and estimation, so that the accuracy and timeliness of judgment are poor.
In order to solve the problems in the technology, after the copper foil is prepared, the warp monitoring device is additionally arranged at the winding end, so that the warp condition of the copper foil can be detected accurately in real time, and the electroplating additive is adjusted or the cathode roller is polished according to the detected warp, so that the bad warp of the copper foil can be effectively improved. The defects of folding, huang Yin, rolling and loosening and the like of the electrolytic copper foil caused by the warping degree are improved, and the edge collapse and folding defects 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 warpage 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 online monitoring method for the warpage of a copper foil comprises the following steps:
s1, stripping the electrolytically prepared copper foil from a cathode roller through a stripping roller;
s2, sequentially tensioning the copper foil through a front tension roller, plating an oxidation preventing layer on a submerged roller, transiting a submerged roller, tensioning the copper foil again through a rear tension roller, trimming the copper foil through a warping degree monitoring device;
S3, acquiring the warp degree value of the copper foil through a warp degree monitoring device, and feeding back the warp degree value to a computer end;
s4, winding the copper foil through a winding roller;
The warp monitoring device comprises an infrared generator, an infrared receiver and a signal sensor, wherein the infrared generator and the infrared receiver are respectively arranged at the left end and the right end of the copper foil winding position, the signal sensor is arranged at the same end as the infrared receiver, a plurality of vertically distributed infrared ray emitting points are arranged on the infrared generator, a plurality of vertically distributed infrared ray receiving points are arranged on the infrared receiver, infrared rays emitted by the infrared ray emitting points are parallel to the surface of the copper foil, the copper foil is arranged among the infrared rays, and the number of the shielded infrared rays is collected by the signal sensor to obtain a warp value.
Further, when the copper foil in the step S2 passes through the trimming roller, the 10-20mm rim charge at 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 the adjacent infrared rays is 1-2mm.
Further, the interval time for the signal sensor to collect the warpage value is 1 minute.
The invention has the beneficial effects that: the online monitoring method for the warpage of the copper foil can solve the problems of poor accuracy and timeliness of judgment in the traditional manual monitoring mode, thereby achieving the purposes of collecting the warpage value online, accurately monitoring the warpage condition of the copper foil in real time, timely adjusting an electroplating additive or grinding a cathode roller according to the monitored warpage condition, effectively improving the poor warpage of the copper foil, improving the bending, huang Yin and loosening of the electrolytic copper foil caused by the warpage and improving the edge collapse and the poor bending of the preparation end of the lithium battery cell.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are 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 other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an apparatus for online monitoring of warpage of a copper foil according to an embodiment of the present invention;
fig. 2 is a schematic diagram 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 warpage monitoring device of the copper foil warpage on-line monitoring method according to an embodiment of the present invention;
In the figure: 1. cathode roll, 2, copper foil, 3, stripping roll, 4, front tension roll, 5, submerged roll, 6, submerged roll, 7, back tension roll, 8, trimming roll, 9, wind-up roll, 10, warp monitoring device, 101, infrared generator, 102, infrared receiver, 103, signal sensor, 104, infrared ray, 105, infrared ray emitting point, 106, infrared ray receiving point.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
As shown in fig. 1-3, the online monitoring method for the warpage of the copper foil according to the embodiment of the invention comprises the following steps:
s1, stripping the electrolytically prepared copper foil 2 from the cathode roller 1 through a stripping roller 3;
S2, sequentially tensioning the copper foil 2 through a front tension roller 4, plating an oxidation-preventing layer on a submerged roller 5, transiting a submerged roller 6, tensioning the copper foil again through a rear tension roller 7, trimming the copper foil through a trimming roller 8, and then passing through a warping degree monitoring device 10;
S3, acquiring the warpage value of the copper foil 2 through the warpage monitoring device 10, and feeding back the warpage value to a computer end;
S4, rolling the copper foil through a rolling roller 9;
The warp monitoring device 10 comprises an infrared generator 101, an infrared receiver 102 and a signal sensor 103, wherein the infrared generator 101 and the infrared receiver 102 are respectively arranged at the left end and the right end of a copper foil winding position, the distance is adjustable, 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 vertically distributed infrared ray receiving points 106 are arranged on the infrared receiver 102, infrared rays 104 emitted by the infrared ray emission points 105 are parallel to the surface of the copper foil 2, the copper foil 2 is arranged among the infrared rays 104, the monitored origin is adjustable, and the number of the shielded infrared rays 104 is collected through the signal sensor 103 to obtain a warp value.
When the copper foil 2 in the above step S2 passes through the edge cutting roller 8, the edge of the copper foil 2 with the length of 10-20mm is cut off by a cutter.
The number of the infrared rays 104 is 10-30, and the distance between the adjacent infrared rays 104 is 1-2mm, which can be set according to the monitoring precision requirement.
The interval time between the signal sensor 103 and the collection of the warpage value is 1 minute, which can be set according to the monitoring requirement.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes the above technical solutions of the present invention in detail by a specific usage manner.
When the copper foil is warped, the 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 number of the infrared rays 104 which cannot be received, and 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 the computer monitor.
In summary, by means of the technical scheme, the problem that the accuracy and timeliness of traditional manual monitoring mode judgment are poor can be solved, so that the purposes of collecting the warpage value on line, monitoring the warpage condition of the copper foil accurately in real time, adjusting an electroplating additive or grinding a cathode roller timely according to the monitored warpage condition, effectively improving the poor warpage of the copper foil, improving the bending, huang Yin and rolling loose of the electrolytic copper foil caused by the warpage and improving the edge collapse and poor bending of the preparation end of the lithium battery cell are achieved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. The online monitoring method for the warpage of the copper foil is characterized by comprising the following steps of:
s1, stripping the electrolytically prepared copper foil (2) from the cathode roller (1) through a stripping roller (3);
S2, sequentially tensioning the copper foil (2) through a front tension roller (4), plating an oxidation-preventing layer on a submerged roller (5), transitional a submerged roller (6), tensioning again through a rear tension roller (7), trimming by a trimming roller (8), and then passing through a warping degree monitoring device (10);
S3, acquiring a warp degree value of the copper foil (2) through a warp degree monitoring device (10), and feeding back the warp degree value to a computer end;
s4, rolling the copper foil through a rolling roller (9);
Warp monitoring devices (10) are including infrared generator (101), infrared receiver (102), signal sensor (103), infrared generator (101), infrared receiver (102) are installed respectively in both ends about copper foil rolling position, signal sensor (103) with infrared receiver (102) are in same end, be equipped with a plurality of vertical infrared ray emission points (105) that distribute on infrared generator (101), be equipped with a plurality of vertical infrared ray reception points (106) that distribute on infrared receiver (102), a plurality of infrared ray (104) that infrared ray emission point (105) sent all are parallel with copper foil (2) surface, copper foil (2) are placed in a plurality of between infrared ray (104), gather the quantity that is sheltered from infrared ray (104) through signal sensor (103) and obtain the warp numerical value.
2. The on-line monitoring method according to claim 1, wherein the 10-20mm edge of the copper foil (2) is cut off by a cutter when the copper foil (2) passes through the edge cutting roller (8) in the step S2.
3. The on-line monitoring method according to claim 1, characterized in that the number of the infrared rays (104) is 10-30, and the distance between adjacent infrared rays (104) is 1-2mm.
4. An on-line monitoring method according to claim 3, characterized in that the signal sensor (103) is arranged to collect the warpage values at intervals 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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| CN114855226A CN114855226A (en) | 2022-08-05 |
| CN114855226B true 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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| 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 |
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 |
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