CN114709374A - Pressing and covering integrated negative plate lithium supplementing device and lithium supplementing method - Google Patents

Pressing and covering integrated negative plate lithium supplementing device and lithium supplementing method Download PDF

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Publication number
CN114709374A
CN114709374A CN202210533552.3A CN202210533552A CN114709374A CN 114709374 A CN114709374 A CN 114709374A CN 202210533552 A CN202210533552 A CN 202210533552A CN 114709374 A CN114709374 A CN 114709374A
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China
Prior art keywords
lithium
film
face
oil
belt
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Withdrawn
Application number
CN202210533552.3A
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Chinese (zh)
Inventor
尹高斌
刘刚
龙国斌
左文广
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Shenzhen Qiangrui Precision Technology Co ltd
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Shenzhen Qiangrui Precision Technology Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • H01M4/0435—Rolling or calendering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The application relates to a pressing and covering integrated negative plate lithium supplementing device and a lithium supplementing method, relates to the field of lithium ion battery manufacturing equipment, and is mainly applied to a lithium belt rolling and covering production line. In the related technology, when the lithium belt and the negative plate are unqualified in pressing, a certain section of unqualified negative plate, the A-surface lithium belt and the B-surface lithium belt are cut and removed at the same time, so that the lithium belt is wasted. According to the technical scheme, the smooth-surface negative plate and the A-surface lithium belt are simultaneously rolled and covered by the A-surface lithium covering mechanism to form the single-surface lithium film negative plate; and then, simultaneously carrying out calendering and covering on the single-sided lithium film negative plate and the B-sided lithium unwinding mechanism through the B-sided lithium covering mechanism to form the double-sided lithium film negative plate, thereby processing the double-sided lithium film negative plate step by step. On the first hand, the problem of the lamination error of the lithium belt and the protective film is solved; in the second aspect, the part of the protective film needed to transmit the lithium ribbon is saved; and in the third aspect, the pressing quality is controlled by dividing the handle. Thereby reducing the production cost in many ways.

Description

Pressing and covering integrated negative plate lithium supplementing device and lithium supplementing method
Technical Field
The application relates to the field of lithium ion battery manufacturing equipment, in particular to a pressing and covering integrated negative plate lithium supplementing device and a lithium supplementing method.
Background
In the production process of the lithium ion battery, due to the chemical characteristics of lithium ions, an electrode material and an electrolyte react on a solid-liquid interface during the first charge and discharge process of the lithium ion battery to form a Solid Electrolyte Interface (SEI) film for short, which covers the surface of the electrode material. Wherein the generation of the SEI film consumes lithium ions in a part of the cathode material, thereby causing the energy density of the lithium ion battery to be reduced irreversibly during the first charge and discharge process. In order to improve the problem, in the production process of the lithium ion battery, a layer of metal lithium film is coated on the surface of the negative electrode plate in advance, so that the metal lithium on the negative electrode material can lose electrons and be oxidized into lithium ions to return to the positive electrode material in the discharging process, thereby compensating the loss of the lithium ions of the positive electrode material and improving the energy density of the lithium ion battery.
Referring to fig. 1, for the production process of rolling and laminating a lithium tape on a negative electrode sheet, the related art method first rolls and laminates an a-side lithium tape on the surface of a first lithium tape protective film, and simultaneously rolls and laminates a B-side lithium tape on the surface of a second lithium tape protective film; and simultaneously pressing and covering the first lithium belt protective film covered with the A-surface lithium belt and the second lithium belt protective film covered with the B-surface lithium belt with the negative plate into a whole. In the production process, the A-surface lithium belt and the B-surface lithium belt are simultaneously coated with the negative plate after being transmitted by the first lithium belt protective film and the second lithium belt protective film.
Aiming at the technical means, in the process of simultaneously laminating the A-surface lithium strip and the B-surface lithium strip with the negative plate, if the problem of unqualified lamination occurs in the process of laminating the A-surface lithium strip or the B-surface lithium strip with the negative plate, the unqualified section of the negative plate, the A-surface lithium strip and the B-surface lithium strip need to be cut and removed simultaneously. The lithium ribbon is expensive, so that the problem of high production cost is easily caused.
Disclosure of Invention
In order to reduce the production cost of the production process of rolling and coating the lithium tape on the negative plate, the application provides a pressing and coating integrated negative plate lithium supplementing device and a lithium supplementing method.
In a first aspect, the application provides a lithium replenishing device for a pressing and covering integrated negative plate, which adopts the following technical scheme.
A lithium supplementing device for a pressing and covering integrated negative plate comprises:
installing a frame;
the pole piece unreeling mechanism is used for accommodating the smooth negative pole winding drum and transmitting the smooth negative pole pieces through the transmission roller and is arranged on the mounting rack;
the surface A lithium unwinding mechanism is used for accommodating a surface A lithium winding drum and transmitting a surface A lithium belt in the surface A lithium winding drum through a transmission roller, and the surface A lithium unwinding mechanism is arranged on the mounting rack;
the A-surface lithium covering mechanism is used for receiving a smooth surface negative plate in the pole piece unreeling mechanism and an A-surface lithium belt in the A-surface lithium unreeling mechanism and rolling and covering the smooth surface negative plate and the A-surface lithium belt to form a single-surface lithium film negative plate, and the A-surface lithium covering mechanism is arranged on the mounting rack;
the surface B lithium unwinding mechanism is used for accommodating a surface B lithium winding drum and transmitting a surface B lithium belt in the surface B lithium winding drum through a transmission roller, the surface B lithium unwinding mechanism is arranged on the mounting rack, and the surface B lithium unwinding mechanism is arranged on the side face, away from the surface A lithium unwinding mechanism, of the pole piece unwinding mechanism;
the B-side lithium covering mechanism is used for receiving the single-side lithium film negative plate in the A-side lithium covering mechanism and the B-side lithium belt in the B-side lithium unwinding mechanism and rolling and covering the single-side lithium film negative plate and the B-side lithium belt to form a double-side lithium film negative plate, and the B-side lithium covering mechanism is arranged on the side face, far away from the B-side lithium unwinding mechanism, of the pole piece unwinding mechanism;
and the pole piece winding mechanism is used for winding the double-sided lithium film negative pole piece, and the pole piece winding mechanism is arranged on the installation rack.
By adopting the technical scheme, the pole piece unreeling mechanism conveys the smooth surface negative pole piece in the smooth surface negative pole reel, the A surface lithium unreeling mechanism conveys the A surface lithium belt in the A surface lithium reel, and the A surface lithium unreeling mechanism and the A surface lithium covering mechanism are simultaneously subjected to calendaring and covering to form the single-surface lithium film negative pole piece; and then the B-surface lithium unwinding mechanism transmits a B-surface lithium belt in the B-surface lithium winding drum, the single-surface lithium film negative plate and the B-surface lithium unwinding mechanism are simultaneously rolled and covered by the B-surface lithium covering mechanism to form a double-surface lithium film negative plate, and then the double-surface lithium film negative plate is wound by the pole plate winding mechanism. Compared with the method that the first lithium belt protective film covered with the A-surface lithium belt and the second lithium belt protective film covered with the B-surface lithium belt are simultaneously pressed and covered with the negative plate into a whole, the technical scheme firstly abandons the mode that the lithium belt is firstly pressed and covered on the protective film, and then the first lithium belt protective film covered with the A-surface lithium belt and the second lithium belt protective film covered with the B-surface lithium belt are simultaneously pressed and covered with the negative plate into a whole, so that on the one hand, the problem of pressing and covering errors of the lithium belt and the protective film is improved, and the pressing and covering yield of the lithium belt and the negative plate is improved; in the second aspect, the part of the protective film needing to transmit the lithium strip is saved, and the use cost of the protective film is reduced; and in the third aspect, the two surfaces of the negative plate are pressed and covered step by step, so that the situation that a certain section of unqualified negative plate, the A-surface lithium belt and the B-surface lithium belt are cut and removed at the same time to cause lithium belt waste is improved.
Optionally, the pressing and covering integrated negative plate lithium supplement device further comprises:
the first back film unwinding mechanism is used for accommodating a first back film winding drum and transmitting a first protection film in the first back film winding drum through a transmission roller, the first back film unwinding mechanism is arranged on the installation rack, and the first protection film is positioned on the side face, away from the smooth surface negative plate, of the A-surface lithium belt and enters the A-surface lithium press-coating mechanism along with the A-surface lithium belt;
the first back film winding mechanism is used for winding the first protection film transmitted from the A-surface lithium pressing mechanism;
the second back film unwinding mechanism is used for accommodating a second back film winding drum and transmitting a second protective film in the second back film winding drum through a transmission roller, the second back film unwinding mechanism is arranged on the installation rack, and the second protective film is positioned on the side face, away from the single-face lithium film cathode plate, of the B-face lithium belt and enters the B-face lithium press-coating mechanism along with the B-face lithium belt;
and the second back film winding mechanism is used for winding a second protective film transmitted from the B-surface lithium covering mechanism.
By adopting the technical scheme, the first protective film is positioned on the side face of the A-face lithium belt far away from the smooth-face negative plate and enters the A-face lithium pressing mechanism along with the A-face lithium belt, and then the first protective film transmitted from the A-face lithium pressing mechanism is wound by the first back film winding mechanism, so that when the A-face lithium pressing mechanism presses and covers the A-face lithium belt on one face of the smooth-face negative plate, the first protective film can protect the surface of the A-face lithium belt far away from the side of the smooth-face negative plate, and the problem that the A-face lithium belt is scratched by the compression roller is solved; the second protection film is located on the side face, where the B-face lithium belt is far away from the single-face lithium film negative plate, and enters the B-face lithium pressing mechanism along with the B-face lithium belt, and then the second protection film transmitted from the B-face lithium pressing mechanism is wound by the second back film winding mechanism, so that when the B-face lithium pressing mechanism presses the B-face lithium belt to cover the smooth face of the single-face lithium film negative plate, the second protection film can protect the surface, where the B-face lithium belt is far away from the single-face lithium film negative plate, and the problem that the B-face lithium belt is scratched by the pressing roller is solved.
Optionally, first notacoria unwinding mechanism with still be provided with first notacoria fat liquoring mechanism between the A face lithium covers the mechanism, first notacoria fat liquoring mechanism includes:
the mounting base is provided with a bracket side plate as a mounting base on the upper surface;
the oiling assembly comprises an oil containing groove for containing the attached oil and an oiling roller for adhering the attached oil in the oil containing groove, the oil containing groove is fixed above the mounting base, the oiling roller is rotatably mounted on the support side plate, and one end of the oiling roller is coaxially connected with an oiling driving piece for driving the oiling roller to rotate;
the oil scraping assembly comprises an oil scraping support matched with the support side plate in a sliding mode and an oil scraping piece used for scraping an oil film with uniform thickness on the surface of the oiling roller, the oil scraping support is installed on the side face, facing the oiling roller, of the support side plate, and the oil scraping piece is installed on the side face of the oil scraping support;
and the belt pressing assembly is used for pressing the surface of the first protective film facing the smooth negative plate on the outer peripheral surface of the oiling roller so as to adhere the adhering oil uniformly scraped by the oil scraping piece.
By adopting the technical scheme, the first back film oiling mechanism can carry out oiling treatment on the side surface of the first protective film close to the smooth surface negative plate, the oiling driving piece drives the oiling roller to rotate, after the oiling roller is adhered with the attached oil in the oil containing groove, the oil scraping support drives the surface of the oil scraping piece oiling roller to scrape and coat an oil film with uniform thickness, then the belt pressing assembly tightly presses the first protective film on the outer circumferential surface of the oiling roller so as to adhere the adhering oil uniformly scraped by the oil scraping piece, thereby ensuring that the adhering oil on the first protective film is uniform and consistent, because the oil scraping bracket can slide on the bracket side plate, when the thickness of the oil film on the surface of the oiling roller needs to be adjusted, can be through adjusting the distance between frizing support and the support curb plate to make frizing piece can scrape out the even oil film of membrane thickness on the oiling roller, thereby improve the accuracy nature of oil film thickness in the fat liquoring process.
Optionally, the pressing and covering integrated negative plate lithium supplement device further comprises:
the third back film unwinding mechanism is used for accommodating a third back film winding drum and transmitting a third protection film in the third back film winding drum through a transmission roller, the third back film unwinding mechanism is arranged on the installation rack, and the third protection film is positioned on the side face of the single-sided lithium film negative plate, which is far away from the B-side lithium belt, and enters the B-side lithium press mechanism along with the single-sided lithium film negative plate;
and the third back film winding mechanism is used for winding a third protective film transmitted from the B-surface lithium pressing mechanism.
By adopting the technical scheme, the third protective film is positioned on the side face, away from the B-face lithium belt, of the single-face lithium film negative plate and enters the B-face lithium pressing mechanism along with the single-face lithium film negative plate, and then the third protective film transmitted from the B-face lithium pressing mechanism is wound by the third back film winding mechanism, so that when the B-face lithium pressing mechanism presses and covers the B-face lithium belt on the smooth face of the single-face lithium film negative plate, the third protective film can protect the surface, away from the B-face lithium belt, of the single-face lithium film negative plate, and the problem that the side face, pressed and covered with the A-face lithium belt in the single-face lithium film negative plate, is scratched by the pressing roller is solved.
In a second aspect, the present application further provides a lithium supplementing method, which adopts the following technical scheme.
A lithium supplementing method is applied to the pressing and covering integrated negative plate lithium supplementing device, and comprises the following steps:
outputting a smooth surface negative plate in a pole plate unwinding mechanism and reserving the smooth surface negative plate for use;
outputting the A-surface lithium belt, and outputting and reserving the A-surface lithium belt in the A-surface lithium unwinding mechanism;
the single-sided covering mechanism is used for simultaneously receiving the smooth negative plate in the pole piece unwinding mechanism and the A-sided lithium belt in the A-sided lithium unwinding mechanism and rolling and covering the smooth negative plate and the A-sided lithium belt to form a single-sided lithium film negative plate;
outputting the B-surface lithium belt, and outputting and reserving the B-surface lithium belt in a B-surface lithium unwinding mechanism;
the B-side lithium pressing mechanism simultaneously receives the single-side lithium film negative plate in the A-side lithium pressing mechanism and the B-side lithium belt in the B-side lithium unwinding mechanism and rolls and covers the single-side lithium film negative plate and the B-side lithium belt to form a double-side lithium film negative plate;
and (4) winding a finished product, namely winding the double-sided lithium film negative plate in a pole plate winding mechanism.
By adopting the technical scheme, the smooth-surface negative plate and the A-surface lithium belt are simultaneously rolled and covered by the A-surface lithium pressing and covering mechanism to form the single-surface lithium film negative plate; then, the single-sided lithium film negative plate and the B-sided lithium unwinding mechanism are simultaneously rolled and covered by the B-sided lithium covering mechanism to form the double-sided lithium film negative plate, so that the double-sided lithium film negative plate is processed step by step, and the situation that a certain section of unqualified negative plate, an A-sided lithium belt and a B-sided lithium belt are cut and removed simultaneously to cause lithium belt waste is improved.
Optionally, a step of outputting a first protection film is further provided before the single-side pressing step, and the first protection film is output and reserved in the first back film unwinding mechanism;
in the single-side covering step, the A-side lithium covering mechanism also receives a first protective film in the first back film unreeling mechanism, the first protective film is located on the side face, far away from the smooth-surface negative plate, of the A-side lithium belt, and the first protective film enters the A-side lithium covering mechanism along with the A-side lithium belt;
and a first protective film rolling step is also arranged after the single-surface pressing step, and the first protective film transmitted from the A-surface lithium pressing mechanism is rolled in the first back film rolling mechanism.
A step of outputting a second protective film is also arranged before the double-sided laminating step, and the second protective film is output and reserved in a second back film unreeling mechanism;
in the double-face pressing step, the B-face lithium pressing mechanism also receives a second protective film in the second back film unreeling mechanism, the second protective film is positioned on the side face, away from the single-face lithium film cathode piece, of the B-face lithium belt, and the second protective film enters the B-face lithium pressing mechanism along with the B-face lithium belt;
and a second protective film rolling step is also arranged after the double-side pressing step, and a second protective film transmitted from the B-side lithium pressing mechanism is rolled in a second back film rolling mechanism.
By adopting the technical scheme, when the surface-A lithium pressing mechanism presses and covers the surface-A lithium strip on one surface of the smooth negative plate, the first protective film can protect the surface of the surface-A lithium strip far away from the side where the smooth negative plate is located; when the B-side lithium pressing mechanism presses and covers the B-side lithium strip on the smooth surface of the single-side lithium film negative plate, the second protective film can protect the surface of the B-side lithium strip away from the side where the single-side lithium film negative plate is located, and the yield of the double-side lithium film negative plate in the production process is improved.
Optionally, a first protective film oiling step is arranged between the first protective film outputting step and the single-side pressing step, and the first protective film oiling step includes:
arranging a bracket side plate as a mounting base on the upper surface of the mounting base;
coating adhesive oil on the side face, facing the surface A lithium belt, of the first protective film in an oil coating assembly, wherein the oil coating assembly comprises an oil containing groove for containing the adhesive oil and an oil coating roller for adhering the adhesive oil in the oil containing groove, the oil containing groove is fixed above the mounting base, the oil coating roller is rotatably mounted on the side plate of the support, and one end of the oil coating roller is coaxially connected with an oil coating driving piece for driving the oil coating roller to rotate;
the thickness of an oil film coated with attached oil and coated on a first protective film is adjusted by matching an oil scraping assembly and an oiling assembly, the oil scraping assembly comprises an oil scraping support matched with a support side plate in a sliding mode and an oil scraping piece used for scraping the oil film with uniform thickness on the surface of an oiling roller, the oil scraping support is installed on the side face, facing the oiling roller, of the support side plate, and the oil scraping piece is installed on the side face of the oil scraping support;
and the first protective film is tightly pressed on the peripheral surface of the oiling roller through a belt pressing assembly so as to adhere the adhering oil uniformly scraped by the oil scraping piece.
Through adopting above-mentioned technical scheme, first notacoria fat liquoring mechanism can be close to the side at plain noodles negative pole piece place to first protection film and carry out the fat liquoring and handle, when needing to adjust the oil film thickness on fat liquoring roller surface, can be through adjusting the distance between frizing support and the support curb plate to make frizing spare can scrape out the even oil film of membrane thickness on the fat liquoring roller, thereby improve the accuracy nature of oil film thickness in the fat liquoring in-process.
Optionally, a step of outputting a third protective film is further provided before the double-sided laminating step, and the third protective film is output and reserved in a third back film unwinding mechanism;
in the double-face pressing step, the B-face lithium pressing mechanism also receives a third protective film in a third back film unreeling mechanism, the third protective film is positioned on the side face, far away from the B-face lithium belt, of the single-face lithium film negative plate, and the first protective film enters the B-face lithium pressing mechanism along with the single-face lithium film negative plate;
and a third protective film rolling step is also arranged after the double-side pressing step, and a third protective film transmitted from the B-side lithium pressing mechanism is rolled in a third back film rolling mechanism.
By adopting the technical scheme, when the B-surface lithium pressing mechanism presses and covers the B-surface lithium strip on the smooth surface of the single-surface lithium film negative plate, the third protective film can protect the surface of the single-surface lithium film negative plate far away from the side where the B-surface lithium strip is located, the problem that the side surface of the single-surface lithium film negative plate pressed and covered with the A-surface lithium strip is scratched by the pressing roller is solved, and the yield of the double-surface lithium film negative plate in the production process is further improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the production cost is reduced. Simultaneously rolling and laminating the smooth negative plate and the A-side lithium belt by an A-side lithium pressing and laminating mechanism to form a single-side lithium film negative plate; and then, simultaneously carrying out calendering and laminating on the single-sided lithium film negative plate and the B-sided lithium unwinding mechanism through the B-sided lithium laminating mechanism to form the double-sided lithium film negative plate, thus processing the double-sided lithium film negative plate step by step, and then rolling the double-sided lithium film negative plate through the pole plate rolling mechanism. On the first hand, the problem of lamination errors of the lithium belt and the protective film is solved, and the lamination yield of the lithium belt and the negative plate is improved; in the second aspect, the part of the protective film needing to transmit the lithium strip is saved, and the use cost of the protective film is reduced; and in the third aspect, the two surfaces of the negative plate are pressed and covered step by step, so that the situation that a certain section of unqualified negative plate, the A-surface lithium belt and the B-surface lithium belt are cut and removed at the same time to cause lithium belt waste is improved.
2. The production yield is high. When the surface-A lithium pressing mechanism presses and covers the surface-A lithium tape on one surface of the smooth negative plate, the first protective film can protect the surface of the surface-A lithium tape far away from the side where the smooth negative plate is located; when the B-surface lithium pressing mechanism presses and covers the B-surface lithium belt on the smooth surface of the single-surface lithium film negative plate, the second protective film can protect the surface of the B-surface lithium belt far away from the side where the single-surface lithium film negative plate is located; when the B-side lithium pressing mechanism presses and covers the B-side lithium strip on the smooth surface of the single-side lithium film negative plate, the third protective film can protect the surface of the single-side lithium film negative plate far away from the side where the B-side lithium strip is located. First notacoria fat liquoring mechanism can carry out the fat liquoring to the side that first protection film is close to plain noodles negative pole piece place and handle, through adjusting the distance between frizing support and the support curb plate to make frizing piece can scrape out the thick even oil film of membrane on the oiling roller, thereby improve the accuracy nature of fat liquoring in-process oil film thickness, thereby improve the yields of two-sided lithium membrane negative pole piece in the production process.
Drawings
FIG. 1 is a schematic diagram of lithium supplement of negative electrode plate according to the related art in the background of the present specification;
FIG. 2 is a schematic diagram of a lithium replenishing device of a pressed and coated integrated negative plate in the embodiment of the application;
FIG. 3 is a schematic diagram of the overall structure of a lithium replenishing device of a pressed and coated integrated negative plate in the embodiment of the present application;
FIG. 4 is a sectional front view of a lithium supplementing device of a pressing-coated integrated negative plate in the embodiment of the present application;
FIG. 5 is a schematic view showing the overall structure of a first back film oiling mechanism in the embodiment of the present application;
FIG. 6 is a schematic diagram of the structure of an oiling assembly in an embodiment of the present application;
fig. 7 is a schematic structural diagram of the oil scraping assembly in the embodiment of the present application.
Description of reference numerals:
10. installing a frame;
11. a pole piece unwinding mechanism; 111. a smooth negative reel; 112. a smooth negative plate; 113. a tape splicing platform; 114. a pole piece deviation rectifying assembly;
12. the surface A comprises a lithium unwinding mechanism; 121. a surface lithium reel; 122. a surface A lithium tape; 123. a speed governing roller assembly; 124. a lithium belt oiling module;
13. a first back film unwinding mechanism; 131. a first backing film roll; 132. a first protective film;
14. a first back film oiling mechanism; 141. installing a base; 1411. a bracket side plate; 1412. adjusting the supporting block; 1413. adjusting a hand wheel; 142. an oiling component; 1421. an oil containing groove; 1422. an oiling roller; 1423. oiling a driving piece; 1424. an oil containing bracket; 1425. a motor bracket; 143. a scraping component; 1431. a scraping oil support; 1432. an oil scraping member; 1432a, a scraper; 1432b, an angle adjusting rod; 1432c, angled ceiling; 1433. an angle adjusting member; 1433a, an adjusting rod support; 1433b, adjusting the micrometer; 144. a belt pressing assembly; 1441. extruding the rotating shaft; 1441a, a turning block; 1441b, a rotation limiting block; 1441c, a limit stud; 1442. extruding the mounting plate; 1443. oiling an extrusion roller; 1444. a reversing roller; 1445. a driving cylinder; 1446. a support limit block;
15. a first back film winding mechanism; 151. a first back film rolling roller;
16. a surface A lithium pressing mechanism; 161. a single-sided lithium film negative plate; 162. a surface extrusion roller; 163. a surface A is adhered with a lithium roller; 164. a surface A is covered with a roller; 165. the A surface supports a back roll;
17. a B-side lithium unwinding mechanism; 171. b surface lithium reel; 172. a B-side lithium tape;
18. a second back film unwinding mechanism; 181. a second backing film roll; 182. a second protective film;
19. a second back film winding mechanism; 191. a second back film winding roller;
20. a B-side lithium pressing mechanism; 201. a double-sided lithium film negative plate; 202. a B surface extrusion roller; 203. adhering a lithium roller on the surface B; 204. a surface B is covered with a roller; 205. the B surface supports a back roller;
21. a third back film unwinding mechanism; 211. a third backing film roll; 212. a third protective film;
22. a third back film winding mechanism; 221. a third back film rolling roller;
23. a pole piece winding mechanism; 231. a pole piece winding roller; 232. a heat absorbing film roller.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses a press-cover integrated negative plate lithium supplementing device.
Referring to fig. 2 and 3, the pressing and covering integrated negative plate lithium supplementing device is a production line which is installed on a vertically arranged installation rack 10, and comprises a pole piece unwinding mechanism 11, an a surface lithium unwinding mechanism 12, an a surface lithium pressing and covering mechanism 16, a B surface lithium unwinding mechanism 17, a B surface lithium pressing and covering mechanism 20 and a pole piece winding mechanism 23 in sequence according to the sequence of the production flow. In this embodiment, in order to facilitate understanding of the overall flow of the present invention, fig. 2 shows the flow relationships among the functional modules by using a schematic diagram, and does not show the positional relationships among the functional modules, and specific positional relationships among the functional modules refer to fig. 3. The working process of the pressing and covering integrated negative plate lithium supplement device is roughly that while the pole piece unreeling mechanism 11 transmits the smooth negative plate 112 in the smooth negative reel 111, the a-side lithium unreeling mechanism 12 transmits the a-side lithium belt 122 in the a-side lithium reel 121, and then the two are simultaneously rolled and covered by the a-side lithium pressing and covering mechanism 16 to form the single-side lithium film negative plate 161; then the B-side lithium unwinding mechanism 17 transports the B-side lithium ribbon 172 in the B-side lithium winding drum 171 out, the single-side lithium film negative electrode sheet 161 and the B-side lithium unwinding mechanism 17 are simultaneously rolled and laminated by the B-side lithium pressing mechanism 20 to form a double-side lithium film negative electrode sheet 201, and then wound by the electrode sheet winding mechanism 23.
Specifically, referring to fig. 3 and 4, the pole piece unwinding mechanism 11 includes a smooth negative pole drum 111 wound with a smooth negative pole piece 112, a tape receiving platform 113, a pole piece deviation rectifying assembly 114, and a plurality of transmission rollers for transmitting the smooth negative pole piece 112, and the smooth negative pole drum 111 wound with the smooth negative pole piece 112 is installed on the side wall of the installation frame 10. The smooth surface negative pole reel 111 is roughly arranged in a cylindrical shape, and the smooth surface negative pole piece 112 conveyed out of the smooth surface negative pole reel 111 enters the pole piece deviation rectifying assembly 114 to rectify the deviation of the traveling direction of the smooth surface negative pole piece 112 through the bearing of the tape connecting platform 113, so that the moving direction of the smooth surface negative pole piece 112 is perpendicular to the side surface of the installation rack 10, and the smooth proceeding of the pressing and covering process is ensured.
Referring to fig. 3 and 4, the a-side lithium unwinding mechanism 12 includes an a-side lithium winding drum 121 wound with an a-side lithium tape 122, a governor roller assembly 123, a lithium tape oiling module 124, and a plurality of transport rollers for transporting the a-side lithium tape 122, and the a-side lithium winding drum 121 wound with the a-side lithium tape 122 is mounted on a side wall of the mounting frame 10. The a-surface lithium roll 121 is disposed in a substantially cylindrical shape, and the a-surface lithium ribbon 122 transported from the a-surface lithium roll 121 is speed-regulated by the speed regulating roller assembly 123, so that the speed at which the a-surface lithium ribbon 122 enters the a-surface lithium covering mechanism 16 can be effectively controlled, and the thickness of the a-surface lithium ribbon 122 in rolling can be controlled from the aspect of feeding speed. The lithium strip oiling module 124 is used for coating and adhering oil to the side surface of the a-surface lithium strip 122 to be attached to the smooth negative plate 112, so that the rolled lithium strip film can be effectively attached to the smooth negative plate 112.
Referring to fig. 3 and 4, the a-side lithium laminating mechanism 16 includes an a-side pressing roller 162, an a-side lithium-sticking roller 163, and an a-side laminating roller 164. A rolling space for rolling the a-side lithium ribbon 122 is formed between the a-side pressing roll 162 and the a-side lithium-binding roll 163. The surface a squeezing roller 162 and the surface a lithium-binding roller 163 are driven by independent motors, wherein a rotation speed difference of 250-. In this embodiment, the rotation speed ratio of the a-side squeeze roller 162 to the a-side lithium-binding roller 163 is 1/300, so that during rolling of the a-side lithium ribbon 122, the a-side squeeze roller 162 and the a-side lithium-binding roller 163 with a rotation speed difference generate different forces on the a-side lithium ribbon 122, and the a-side lithium-binding roller 163 with a higher rotation speed rapidly thins the a-side lithium ribbon 122 by rapidly rubbing the a-side lithium ribbon 122. Since the lithium strip oiling module 124 performs the oil coating treatment on the side surface of the a-surface lithium strip 122 to be attached to the smooth negative plate 112, the thinned a-surface lithium strip 122 can be adhered to the a-surface lithium adhering roller 163 by the adhesion of the oil.
Referring to fig. 3 and 4, a coating space for coating the thinned a-side lithium stripe 122 and the smooth negative electrode sheet 112 is formed between the a-side lithium-sticking roller 163 and the a-side coating roller 164. The a-side lithium-binding roller 163 and the a-side laminating roller 164 are driven by independent motors, and the rotational speeds of the a-side laminating roller 164 and the a-side lithium-binding roller 163 are the same. The a-side lithium ribbon 122 and the smooth-side negative electrode sheet 112 adhered to the a-side lithium adhering roller 163 through the adhesion of the adhesion oil are jointly pressed by the a-side lithium adhering roller 163 and the a-side laminating roller 164, and are laminated together to form the single-side lithium film negative electrode sheet 161.
Further, in order to increase the movement rigidity of the a-surface pressure roller 162 and to improve the problem of uneven rolling of the a-surface pressure roller 162 due to bending caused by insufficient rigidity, referring to fig. 3 and 4, an a-surface support back roller 165 is provided on the side of the a-surface pressure roller 162 away from the a-surface lithium-sticking roller 163, and the a-surface support back roller 165 is in contact with the outer peripheral surface of the a-surface pressure roller 162. In this embodiment, a-side support backing roll 165 is a solid alloy steel roll such that a-side support backing roll 165 is sufficiently rigid to have stable support for a-side press roll 162.
Referring to fig. 3 and 4, the B-side lithium unwinding mechanism 17 is disposed on the side of the pole piece unwinding mechanism 11 away from the a-side lithium unwinding mechanism 12, and the B-side lithium unwinding mechanism 17 is substantially the same as the a-side lithium unwinding mechanism 12, which is not described in detail in this specification.
Referring to fig. 3 and 4, the B-side lithium laminating mechanism 20 includes a B-side pressing roller 202, a B-side lithium-adhering roller 203, and a B-side laminating roller 204. A rolling space for rolling the B-side lithium ribbon 172 is formed between the B-side pressing roll 202 and the B-side lithium-binding roll 203. The B-surface squeezing roller 202 and the B-surface lithium-adhering roller 203 are driven by independent motors, wherein the rotation speed difference between the B-surface squeezing roller 202 and the B-surface lithium-adhering roller 203 is 250-350 times. In this embodiment, the rotation speed ratio of the B-side squeeze roll 202 to the B-side lithium-binding roll 203 is 1/300, so that during the rolling process of the B-side lithium strip 172, the B-side squeeze roll 202 and the B-side lithium-binding roll 203 with the rotation speed difference generate different forces on the B-side lithium strip 172, the B-side lithium-binding roll 203 with the higher rotation speed rapidly rubs the B-side lithium strip 172 to rapidly thin the B-side lithium strip 172, and the thinned B-side lithium strip 172 can be adhered to the B-side lithium-binding roll 203 by the adhesion of the adhering oil.
Referring to fig. 3 and 4, a coating space for coating the thinned B-side lithium tape 172 and the single-side lithium film negative electrode sheet 161 is formed between the B-side lithium-binding roller 203 and the B-side coating roller 204. The B-side lithium-binding roller 203 and the B-side laminating roller 204 are driven by independent motors, and the rotation speeds of the B-side laminating roller 204 and the B-side lithium-binding roller 203 are the same. The B-side lithium tape 172 adhered to the B-side lithium-adhering roller 203 by the adhesion of the adhering oil and the single-sided lithium film negative electrode sheet 161 are pressed by the B-side lithium-adhering roller 203 and the B-side laminating roller 204 together, and are laminated together to form the double-sided lithium film negative electrode sheet 201.
Further, in order to increase the movement rigidity of the B-surface pressure roller 202 and improve the problem of uneven rolling caused by bending of the B-surface pressure roller 202 due to insufficient rigidity, referring to fig. 3 and 4, a B-surface support back roller 205 is provided on the side of the B-surface pressure roller 202 away from the B-surface lithium-sticking roller 203, and the B-surface support back roller 205 is in contact with the outer peripheral surface of the B-surface pressure roller 202. In this embodiment, the B-side support backing roll 205 is a solid alloy steel roll, so that the B-side support backing roll 205 has sufficient rigidity to have stable support to the B-side pressure roll 202.
Referring to fig. 3 and 4, the pole piece winding mechanism 23 includes a pole piece winding roller 231 for winding the double-sided lithium film negative pole piece 201, a heat absorption film roller 232 accommodating a heat absorption film for attaching the double-sided lithium film negative pole piece 201 and cooling the double-sided lithium film negative pole piece 201, and a temperature measurement protection module. The double-sided lithium film negative electrode sheet 201 can be rapidly cooled after being rolled by attaching a layer of heat absorption film on the surface of the double-sided lithium film negative electrode sheet 201. Meanwhile, the temperature measurement protection module can monitor the temperature in the pole piece winding mechanism 23 and adopt over-temperature protection when the temperature is too high.
Referring to fig. 3 and 4, in order to protect the surface of the side of the smooth negative plate 112 away from the a-surface lithium ribbon 122 when the a-surface lithium ribbon 122 is rolled and covered on one surface of the smooth negative plate 112, and in order to protect the surface of the side of the single-surface lithium film negative plate 161 away from the B-surface lithium ribbon 172 when the B-surface lithium ribbon 172 is rolled and covered on the smooth surface of the single-surface lithium film negative plate 161, the pressing and covering integrated negative plate lithium supplementing device further includes a first back film unwinding mechanism 13, a first back film winding mechanism 15, a second back film unwinding mechanism 18, and a second back film winding mechanism 19. First notacoria reel 131 is placed in first notacoria unwinding mechanism 13, first protection film 132 in first notacoria reel 131 transmits through the transmission roller, first protection film 132 is located the side that smooth surface negative pole piece 112 place was kept away from to A face lithium area 122 and follows A face lithium area 122 and gets into A face lithium press mechanism 16 simultaneously, and first protection film 132 can protect A face lithium area 122 and keep away from the surface that smooth surface negative pole piece 112 place side, improves the problem that A face lithium area 122 is by the compression roller fish tail. A second back film reel 181 is arranged in the second back film unwinding mechanism 18, a second protection film 182 in the second back film reel 181 is conveyed by a conveying roller, the second protection film 182 is positioned on the side face of the B-side lithium belt 172 far away from the single-side lithium film negative electrode sheet 161 and enters the B-side lithium press-coating mechanism 20 along with the B-side lithium belt 172, the second protection film 182 can protect the surface of the B-side lithium belt 172 far away from the single-side lithium film negative electrode sheet 161, and the problem that the B-side lithium belt 172 is scratched by a pressing roller is solved. The first back film winding mechanism 15 has a first back film winding roller 151, and the second back film winding mechanism 19 has a second back film winding roller 191. The first back film rolling roller 151 rolls the first protection film 132 conveyed out of the a-surface lithium pressing mechanism 16, and the second back film rolling roller 191 rolls the second protection film 182 conveyed out of the B-surface lithium pressing mechanism 20.
In order to ensure that the a-surface lithium tape 122 has different adhesion forces on two sides of the a-surface lithium tape 122 during the rolling process so that the a-surface lithium tape 122 can adhere to the a-surface lithium-adhering roller 163 after rolling, the side of the first protective film 132 facing the a-surface lithium tape 122 needs to be coated with adhesion oil having smaller adhesion force. Referring to fig. 4 and 5, a first back film oiling mechanism 14 is further disposed between the first back film unwinding mechanism 13 and the a-side lithium pressing mechanism 16, and the first back film oiling mechanism 14 includes an installation base 141, an oiling assembly 142, an oil scraping assembly 143, and a belt pressing assembly 144. The mounting base 141 is in the shape of a rectangular parallelepiped plate. The upper surface of the mounting base 141 is provided with a bracket side plate 1411, and the bracket side plate 1411 arranged in a flat plate shape is vertically fixed to the upper surface of the mounting base 141. In this embodiment, the support side plates 1411 are provided in two, and an installation space for installing each roller is formed between the two support side plates 1411. The oiling assembly 142, the scraping assembly 143, and the belt pressing assembly 144 are mounted to the holder side plate 1411 or the mounting base 141.
Referring to fig. 6, the oil coating assembly 142 is used to coat an adhesive on the first protective film 132. Specifically, the oiling assembly 142 includes an oil receiving groove 1421 for receiving the adhering oil, an oiling roller 1422 for adhering the adhering oil in the oil receiving groove 1421, and an oiling driving member 1423 for driving the oiling roller 1422 to rotate. The oil receiving groove 1421 is fixed on the sidewall of the bracket side plate 1411 by an oil receiving bracket 1424, and the oil receiving groove 1421 is located above the mounting base 141. The oiling roller 1422 is rotatably mounted on the side surface of the bracket side plate 1411 through a rotating bearing, and the oiling roller 1422 is located right above the oil receiving groove 1421 and partially sinks into the inner cavity of the oil receiving groove 1421. The upper surface of installation base 141 is fixed with motor support 1425, installs planetary reducer on motor support 1425, and fat liquoring driving piece 1423 is installed in planetary reducer's terminal surface. In this embodiment, the oiling driving part 1423 is a rotating motor, the output shaft of the planetary reducer is coaxially and fixedly connected with the oiling roller 1422 through a coupler, the output rotating speed of the oiling driving part 1423 is reduced through the planetary reducer, and the rotating torque is increased, so that the rotation of the oiling roller 1422 is more stable.
Referring to fig. 6 and 7, the oil scraping assembly 143 is used to scrape an oil film having a uniform thickness on the oiling roller 1422. The oil scraping assembly 143 includes an oil scraping support 1431 and an oil scraping member 1432, the oil scraping support 1431 is installed on a side surface of the support side plate 1411 facing the oiling roller 1422, and the oil scraping member 1432 is installed on a side surface of the oil scraping support 1431. The oil scraping support 1431 and the support side plate 1411 are matched in a sliding mode, in order to facilitate accurate control over the oil scraping support 1431, the support side plate 1411 is fixedly provided with an adjusting support block 1412, the side face of the adjusting support block 1412 rotates to be provided with an adjusting hand wheel 1413, the adjusting hand wheel 1413 is provided with a screw rod portion, the screw rod portion stretches into the oil scraping support 1431 and is in threaded fit with the oil scraping support 1431, the adjusting hand wheel 1413 is rotated, and therefore position adjustment can be conducted on the oil scraping support 1431 more conveniently and accurately.
Referring to fig. 6 and 7, the oil scraper 1432 includes a scraper 1432a and an angle adjustment lever 1432b for mounting the scraper 1432 a. Since the adhering oil is viscous, the adhering oil on the side of the scraper 1432a close to the scraper 1432a is blocked by the scraper 1432a during the scraping process of the adhering oil, and the force between the adhering oil molecules can cause the adhering oil to be reversely wound and deposited on the upper surface of the scraper 1432 a. By adjusting the angle between the scraper 1432a and the outer circumferential surface of the oiling roller 1422, the viscous force of the scraper 1432a to the adhering oil on the side close to the scraper 1432a can be changed, thereby improving the problem of the adhering oil reverse-winding deposition. In order to adjust the angle of the oil scraping member 1432, the angle adjusting lever 1432b is rotatably engaged with the oil scraping holder 1431, the length direction of the scraper 1432a is parallel to the central axis of the oiling roller 1422, and the oil scraping holder 1431 is fixedly provided with an angle adjusting member 1433 for adjusting the tilting angle of the scraper 1432 a.
Specifically, referring to fig. 6 and 7, the angle adjusting member 1433 includes an adjusting lever seat 1433a fixedly provided to the oil scraping holder 1431 and an adjusting micrometer 1433b for being mounted to the adjusting lever seat 1433 a. The angle adjustment lever 1432b is provided substantially in a cylindrical shape, and the outer peripheral surface of the angle adjustment lever 1432b is cut to have a horizontal upper surface and a horizontal lower surface. The scraper 1432a is attached to an upper surface of the angle adjusting lever 1432b, and an angle top plate 1432c is fixed to a lower surface of the angle adjusting lever 1432 b. The adjustment micrometer 1433b is located under the angle roof 1432c and the adjustment micrometer 1433b supports the lower surface that props the angle roof 1432c, supports the angle roof 1432c on the angle regulation pole 1432b through using the adjustment micrometer 1433b, adjusts the angle of heeling of scraper 1432a through adjustment micrometer 1433b to can change the effort of scraper 1432a to the attached oil that is close to scraper 1432a place side, improve the problem of attached oil backrush deposit. In the process of adjusting the angle of the scraper 1432a, the adjusting micrometer 1433b has clear adjusting data, and the preset angle of the scraper 1432a can be calculated and stored in a recording parameter form, so that the quick adjustment can be performed in the subsequent maintenance process conveniently. Meanwhile, by adjusting the tilting angle of the scraper 1432a, the distance between the scraper 1432a and the bracket side plate 1411 can be adjusted, so that the oil scraping member 1432 can scrape an oil film with uniform film thickness on the oiling roller 1422, and the accuracy of the oil film thickness in the oiling process is improved.
Referring to fig. 6, the belt pressing assembly 144 is used to press the first protective film 132 against the outer circumferential surface of the oiling roller 1422 to adhere the adhering oil scraped uniformly by the scraping member 1432. The belt pressing assembly 144 includes a pressing rotary shaft 1441, a pressing mounting plate 1442, and an oiling pressing roller 1443 and a reversing roller 1444 rotatably mounted to the pressing mounting plate 1442 by coaxial radial bearings. The extrusion rotation shaft 1441 is rotatably fitted to the bracket side plate 1411 through a bearing, and the extrusion mounting plate 1442 is coaxially fixed to the outer peripheral surface of the extrusion rotation shaft 1441, so that the oiling extrusion roller 1443 and the reversing roller 1444 can revolve around the extrusion rotation shaft 1441, while the oiling extrusion roller 1443 and the reclaiming roller can rotate on the extrusion mounting plate 1442. Rotate extrusion mounting panel 1442 and can realize that fat liquoring squeeze roll 1443 compresses tightly first protective film 132 in fat liquoring roller 1422, when needing to maintain fat liquoring roller 1422, can extrude mounting panel 1442 through rotating to make fat liquoring squeeze roll 1443 rotate to dodging the position, thereby be convenient for take out fat liquoring roller 1422.
Referring to fig. 6, in order to improve the operation convenience of the first back film coating mechanism 14, a rotating block 1441a is coaxially fixed to the outer peripheral surface of the end of the extrusion rotating shaft 1441, a driving cylinder 1445 is hinged to the upper surface of the mounting base 141, a driving rod of the driving cylinder 1445 is hinged to the rotating block 1441a, and the extrusion rotating shaft 1441 is driven to rotate when the driving rod of the driving cylinder 1445 contracts. Since the extrusion mounting plate 1442 is coaxially fixed to the outer peripheral surface of the extrusion rotation shaft 1441, the extrusion mounting plate 1442 can be automatically turned over by driving the air cylinder 1445, and the operational convenience of the first back film oiling mechanism 14 is improved. In order to limit the revolution angle of the oil applying press roller 1443, a rotation limit block 1441b is coaxially fixed to the press rotation shaft 1441. The rotation limiting block 1441b is substantially rectangular block-shaped, and the rotation limiting block 1441b is coaxially fixed to the outer peripheral surface of the extrusion rotation shaft 1441 in a clasping manner. The side wall of the rotating limiting block 1441b is provided with a limiting stud 1441c in a penetrating manner, the side wall of the bracket side plate 1411 is provided with a supporting limiting block 1446 for abutting against the limiting stud 1441c, and the limiting stud 1441c performs angle limiting on the extrusion rotating shaft 1441 by abutting against the supporting limiting block 1446, so that the oiling extrusion roller 1443 has a specific compression position.
Further, in order to protect the surface of the single-sided lithium film negative electrode sheet 161 away from the side where the B-sided lithium film negative electrode sheet 172 is located when the B-sided lithium ribbon 172 is rolled and coated on the light surface of the single-sided lithium film negative electrode sheet 161, referring to fig. 3 and 4, the pressing and coating integrated negative electrode sheet lithium supplementing device further includes a third back film unwinding mechanism 21 and a third back film winding mechanism 22. A third back film winding drum 211 is arranged in the third back film unwinding mechanism 21, a third protection film 212 in the third back film winding drum 211 is transmitted through a transmission roller, the third protection film 212 is located on the side face, away from the side where the B-face lithium strip 172 is located, of the single-face lithium film negative plate 161 and enters the B-face lithium laminating mechanism 20 along with the single-face lithium film negative plate 161, the third protection film 212 can protect the surface, away from the side where the B-face lithium strip 172 is located, of the single-face lithium film negative plate 161, and the problem that the side face, pressed and coated with the a-face lithium strip 122, of the single-face lithium film negative plate 161 is scratched by a pressing roller is solved. The third back film winding mechanism 22 has a third back film winding roller 221, and the third back film winding roller 221 winds the third protection film 212 conveyed from the a-side lithium pressure coating mechanism 16.
The embodiment of the application also discloses a lithium supplementing method.
A lithium supplementing method comprises the following steps:
s1, outputting a smooth surface negative plate 112, and outputting the smooth surface negative plate 112 in a pole piece unwinding mechanism 11 for use.
And S2, outputting the A-surface lithium belt 122, and outputting the A-surface lithium belt 122 in the A-surface lithium unwinding mechanism 12 for use.
And S3, outputting the first protection film 132, namely outputting the first protection film 132 in the first back film unwinding mechanism 13 for use. Here, the steps S1, S2, and S3 may be performed in no particular order or simultaneously.
S4, the first protective film 132 oiling step comprises:
s41, arranging a support side plate 1411 serving as a mounting base on the upper surface of the mounting base 141;
s42, coating adhesive oil on the side face, facing the surface A, of the lithium belt 122, of the first protective film 132 in the oil coating assembly 142, wherein the oil coating assembly 142 comprises an oil containing groove 1421 for containing the adhesive oil and an oil coating roller 1422 for adhering the adhesive oil in the oil containing groove 1421, the oil containing groove 1421 is fixed above the mounting base 141, the oil coating roller 1422 is rotatably mounted on the support side plate 1411, and one end of the oil coating roller 1422 is coaxially connected with an oil coating driving piece 1423 for driving the oil coating roller 1422 to rotate;
s43, the thickness of an oil film coated with the adhesion oil and coated on the first protective film 132 is adjusted by matching the oil scraping assembly 143 with the oiling assembly 142, the oil scraping assembly 143 comprises an oil scraping support 1431 in sliding fit with the support side plate 1411 and an oil scraping piece 1432 used for scraping the oil film with uniform thickness on the surface of the oiling roller 1422, the oil scraping support 1431 is installed on the side surface of the support side plate 1411 facing the oiling roller 1422, and the oil scraping piece 1432 is installed on the side surface of the oil scraping support 1431;
s44, the first protective film 132 is pressed against the outer circumferential surface of the oiling roller 1422 by the belt pressing assembly 144 to adhere the adhering oil uniformly scraped by the scraping member 1432.
And S5, single-face pressing, wherein the A-face lithium pressing mechanism 16 receives the smooth-face negative plate 112 in the pole piece unwinding mechanism 11 and the A-face lithium band 122 in the A-face lithium unwinding mechanism 12 at the same time and rolls and covers the two to form a single-face lithium film negative plate 161, the A-face lithium pressing mechanism 16 also receives the first protective film 132 in the first back film unwinding mechanism 13, the first protective film 132 is located on the side face, away from the smooth-face negative plate 112, of the A-face lithium band 122, the first protective film 132 enters the A-face lithium pressing mechanism 16 along with the A-face lithium band 122 at the same time, and when the A-face lithium pressing mechanism 16 rolls and covers the A-face lithium band 122 on the side face of the smooth-face negative plate 112, the first protective film 132 can protect the surface, away from the smooth-face negative plate 112, of the A-face lithium band 122.
S6, a first protection film 132 rolling step, rolling the first protection film 132 conveyed from the a-surface lithium pressing mechanism 16 in the first back film rolling mechanism 15.
And S7, outputting the B-surface lithium belt 172, and outputting the B-surface lithium belt 172 in the B-surface lithium unwinding mechanism 17 for use.
And S8, outputting the second protective film 182, namely outputting the second protective film 182 in the second back film unwinding mechanism 18 for use.
And S9, outputting the third protective film 212, namely outputting the third protective film 212 in the third back film unwinding mechanism 21 for later use. Here, the steps S7, S8, and S9 may be performed in no particular order or simultaneously.
S10, double-sided pressing, wherein the B-side lithium pressing mechanism 20 simultaneously receives the single-side lithium film negative plate 161 in the A-side lithium pressing mechanism 16 and the B-side lithium tape 172 in the B-side lithium unreeling mechanism 17 and rolls and covers the single-side lithium film negative plate 161 and the B-side lithium tape 172 to form a double-sided lithium film negative plate 201; the B-side lithium laminating mechanism 20 further receives a second protection film 182 in the second back film unreeling mechanism 18, the second protection film 182 is located on the side of the B-side lithium tape 172 away from the single-side lithium film negative electrode sheet 161, and the second protection film 182 follows the B-side lithium tape 172 and enters the B-side lithium laminating mechanism 20 at the same time. When the B-side lithium laminating mechanism 20 laminates the B-side lithium tape 172 to the smooth surface of the single-side lithium film negative electrode sheet 161 by rolling, the second protective film 182 can protect the surface of the side of the B-side lithium tape 172 away from the single-side lithium film negative electrode sheet 161, so that the yield of the double-side lithium film negative electrode sheet 201 in the production process is improved. The B-side lithium laminating mechanism 20 further receives a third protection film 212 in the third back film unreeling mechanism 21, the third protection film 212 is located on the side of the single-sided lithium film negative electrode sheet 161 away from the B-side lithium tape 172, and the first protection film 132 enters the B-side lithium laminating mechanism 20 along with the single-sided lithium film negative electrode sheet 161. When the B-side lithium laminating mechanism 20 laminates the B-side lithium tape 172 to the smooth surface of the single-side lithium film negative electrode sheet 161 by rolling, the third protective film 212 can protect the surface of the single-side lithium film negative electrode sheet 161 away from the side where the B-side lithium tape 172 is located, the problem that the side surface of the single-side lithium film negative electrode sheet 161 on which the a-side lithium tape 122 is laminated is scratched by a pressing roller is solved, and the yield of the double-side lithium film negative electrode sheet 201 in the production process is further improved.
S11, a second protection film 182 rolling step of rolling the second protection film 182 transferred from the B-side lithium capping mechanism 20 in the second back film rolling mechanism 19.
S12, a third protection film 212 rolling step, in which the third protection film 212 conveyed from the B-side lithium cladding mechanism 20 is rolled in the third back film rolling mechanism 22.
S13, winding a finished product, and winding the double-sided lithium film negative plate 201 in the pole piece winding mechanism 23. Here, the steps S11, S12, and S13 may be performed in no particular order or simultaneously.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereby. Wherein like parts are designated by like reference numerals. It should be noted that as used in the foregoing description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component. Therefore: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a press and cover integrative negative pole piece and mend lithium device which characterized in that includes:
a mounting frame (10);
the pole piece unreeling mechanism (11) is used for accommodating the smooth negative pole winding drum (111) and transmitting the smooth negative pole piece (112) through the transmission roller, and the pole piece unreeling mechanism (11) is arranged on the installation rack (10);
the A-surface lithium unwinding mechanism (12) is used for accommodating the A-surface lithium winding drum (121) and transmitting an A-surface lithium belt (122) in the A-surface lithium winding drum (121) through a transmission roller, and the A-surface lithium unwinding mechanism (12) is arranged on the mounting rack (10);
the A-surface lithium covering mechanism (16) is used for receiving a smooth-surface negative plate (112) in the pole piece unwinding mechanism (11) and an A-surface lithium belt (122) in the A-surface lithium unwinding mechanism (12) and rolling and covering the smooth-surface negative plate and the A-surface lithium belt to form a single-surface lithium film negative plate (161), and the A-surface lithium covering mechanism (16) is arranged on the mounting rack (10);
the surface B lithium unwinding mechanism (17) is used for accommodating a surface B lithium winding drum (171) and transmitting a surface B lithium belt (172) in the surface B lithium winding drum (171) through a transmission roller, the surface B lithium unwinding mechanism (17) is arranged on the mounting rack (10), and the surface B lithium unwinding mechanism (17) is arranged on the side face, away from the surface A lithium unwinding mechanism (12), of the pole piece unwinding mechanism (11);
the B-side lithium covering mechanism (20) is used for receiving the single-side lithium film negative plate (161) in the A-side lithium covering mechanism (16) and the B-side lithium belt (172) in the B-side lithium unreeling mechanism (17) and rolling and covering the single-side lithium film negative plate and the B-side lithium belt to form a double-side lithium film negative plate (201), and the B-side lithium covering mechanism (20) is arranged on the side face, far away from the B-side lithium unreeling mechanism (17), of the pole piece unreeling mechanism (11);
and the pole piece winding mechanism (23) is used for winding the double-sided lithium film negative pole piece (201), and the pole piece winding mechanism (23) is arranged on the installation rack (10).
2. The pressed and coated integrated negative electrode plate lithium supplementing device according to claim 1, further comprising:
the first back film unreeling mechanism (13) is used for accommodating a first back film reel (131) and transmitting a first protection film (132) in the first back film reel (131) through a transmission roller, the first back film unreeling mechanism (13) is arranged on the installation rack (10), and the first protection film (132) is located on the side face, away from the smooth surface negative plate (112), of the A-surface lithium belt (122) and enters the A-surface lithium press mechanism (16) along with the A-surface lithium belt (122);
the first back film winding mechanism (15) is used for winding the first protection film (132) conveyed out of the A-surface lithium pressing mechanism (16);
the second back film unwinding mechanism (18) is used for accommodating a second back film winding drum (181) and transmitting a second protection film (182) in the second back film winding drum (181) through a transmission roller, the second back film unwinding mechanism (18) is arranged on the installation rack (10), and the second protection film (182) is positioned on the side face, away from the single-face lithium film negative electrode sheet (161), of the B-face lithium belt (172) and enters the B-face lithium press-covering mechanism (20) along with the B-face lithium belt (172);
and the second back film winding mechanism (19) is used for winding a second protective film (182) transmitted from the B-surface lithium pressing mechanism (20).
3. The pressing and covering integrated negative pole piece lithium supplementing device according to claim 2, wherein a first back film oiling mechanism (14) is further arranged between the first back film unreeling mechanism (13) and the A-surface lithium pressing and covering mechanism (16), and the first back film oiling mechanism (14) comprises:
the mounting base (141), the upper surface of the mounting base (141) is provided with a bracket side plate (1411) as a mounting base;
the oiling assembly (142) comprises an oil containing groove (1421) for containing attached oil and an oiling roller (1422) for adhering the attached oil in the oil containing groove (1421), the oil containing groove (1421) is fixed above the mounting base (141), the oiling roller (1422) is rotatably mounted on the bracket side plate (1411), and one end of the oiling roller (1422) is coaxially connected with an oiling driving piece (1423) for driving the oiling roller (1422) to rotate;
the oil scraping assembly (143) comprises an oil scraping bracket (1431) matched with the bracket side plate (1411) in a sliding mode and an oil scraping piece (1432) used for scraping an oil film with uniform thickness on the surface of the oiling roller (1422), the oil scraping bracket (1431) is installed on the side face, facing the oiling roller (1422), of the bracket side plate (1411), and the oil scraping piece (1432) is installed on the side face of the oil scraping bracket (1431);
and the belt pressing assembly (144) is used for pressing the surface of the first protective film (132) facing the smooth negative plate (112) to the outer circumferential surface of the oiling roller (1422) so as to adhere the adhering oil uniformly scraped by the oil scraping piece (1432).
4. The pressed and coated integrated negative electrode plate lithium supplementing device according to claim 2, further comprising:
the third back film unwinding mechanism (21) is used for accommodating a third back film winding drum (211) and transmitting a third protection film (212) in the third back film winding drum (211) through a transmission roller, the third back film unwinding mechanism (21) is arranged on the installation rack (10), and the third protection film (212) is positioned on the side face, away from the B-face lithium belt (172), of the single-face lithium film negative plate (161) and enters the B-face lithium press-coating mechanism (20) along with the single-face lithium film negative plate (161);
and the third back film winding mechanism (22) is used for winding a third protective film (212) conveyed out from the B-surface lithium pressing mechanism (20).
5. A lithium supplementing method is applied to the lithium supplementing device of any one of claims 1 to 4, and comprises the following steps:
outputting a smooth surface negative plate (112), and outputting the smooth surface negative plate (112) in a pole piece unreeling mechanism (11) for use;
outputting the A-surface lithium belt (122), and outputting the A-surface lithium belt (122) in the A-surface lithium unwinding mechanism (12) for later use;
the single-sided covering is carried out, and the A-sided lithium covering mechanism (16) simultaneously receives the smooth negative plate (112) in the pole piece unwinding mechanism (11) and the A-sided lithium belt (122) in the A-sided lithium unwinding mechanism (12) and rolls and covers the smooth negative plate and the A-sided lithium belt to form a single-sided lithium film negative plate (161);
outputting a B-surface lithium belt (172), and outputting the B-surface lithium belt (172) in a B-surface lithium unreeling mechanism (17) for use;
the double-sided covering is carried out, and the B-side lithium covering mechanism (20) simultaneously receives the single-sided lithium film negative electrode sheet (161) in the A-side lithium covering mechanism (16) and the B-side lithium tape (172) in the B-side lithium unreeling mechanism (17) and rolls and covers the single-sided lithium film negative electrode sheet and the B-side lithium tape to form a double-sided lithium film negative electrode sheet (201);
and (4) winding a finished product, namely winding the double-sided lithium film negative plate (201) in a pole piece winding mechanism (23).
6. The lithium supplementing method according to claim 5, wherein a step of outputting the first protection film (132) is further provided before the single-side laminating step, and the first protection film (132) is output and reserved in the first back film unwinding mechanism (13);
in the single-face pressing step, the A-face lithium pressing mechanism (16) also receives a first protection film (132) in the first back film unreeling mechanism (13), the first protection film (132) is located on the side face, away from the smooth-face negative plate (112), of the A-face lithium belt (122), and the first protection film (132) enters the A-face lithium pressing mechanism (16) along with the A-face lithium belt (122);
a first protective film (132) rolling step is further arranged after the single-side pressing step, and the first protective film (132) conveyed from the A-side lithium pressing mechanism (16) is rolled in the first back film rolling mechanism (15);
a step of outputting a second protective film (182) is also arranged before the double-sided laminating step, and the second protective film (182) is output and reserved in a second back film unreeling mechanism (18);
in the double-face pressing step, the B-face lithium pressing mechanism (20) also receives a second protective film (182) in the second back film unreeling mechanism (18), the second protective film (182) is positioned on the side face, away from the single-face lithium film negative electrode sheet (161), of the B-face lithium belt (172), and the second protective film (182) enters the B-face lithium pressing mechanism (20) along with the B-face lithium belt (172);
and a second protective film (182) rolling step is also arranged after the double-sided pressing step, and the second protective film (182) transmitted from the B-side lithium pressing mechanism (20) is rolled in a second back film rolling mechanism (19).
7. The method according to claim 6, wherein a first protective film (132) oiling step is arranged between the step of outputting the first protective film (132) and the step of single-sided pressing, and the first protective film (132) oiling step comprises:
a bracket side plate (1411) serving as a mounting base is arranged on the upper surface of the mounting base (141);
coating the side face, facing the A-face lithium belt (122), of the first protective film (132) with the adhering oil in an oil coating assembly (142), wherein the oil coating assembly (142) comprises an oil containing groove (1421) for containing the adhering oil and an oil coating roller (1422) for adhering the adhering oil in the oil containing groove (1421), the oil containing groove (1421) is fixed above the mounting base (141), the oil coating roller (1422) is rotatably mounted on the support side plate (1411), and one end of the oil coating roller (1422) is coaxially connected with an oil coating driving piece (1423) for driving the oil coating roller (1422) to rotate;
the thickness of an oil film coated with the attached oil and coated on the first protective film (132) is adjusted by matching a scraping assembly (143) with an oiling assembly (142), wherein the scraping assembly (143) comprises a scraping bracket (1431) in sliding fit with the bracket side plate (1411) and a scraping piece (1432) used for scraping the oil film with uniform thickness on the surface of the oiling roller (1422), the scraping bracket (1431) is installed on the side surface of the bracket side plate (1411) facing the oiling roller (1422), and the scraping piece (1432) is installed on the side surface of the scraping bracket (1431);
the first protective film (132) is pressed against the outer circumferential surface of the oiling roller (1422) by a belt pressing assembly (144) to adhere the adhering oil uniformly scraped by the oil scraper (1432).
8. The lithium supplementing method according to claim 7, wherein a step of outputting a third protective film (212) is further provided before the double-sided laminating step, and the third protective film (212) is output and reserved in a third back film unwinding mechanism (21);
in the double-sided pressing step, the B-side lithium pressing mechanism (20) also receives a third protective film (212) in a third back film unreeling mechanism (21), the third protective film (212) is located on the side face, away from the B-side lithium belt (172), of the single-side lithium film negative plate (161), and the first protective film (132) enters the B-side lithium pressing mechanism (20) along with the single-side lithium film negative plate (161) at the same time;
and a third protective film (212) rolling step is also arranged after the double-sided pressing step, and the third protective film (212) transmitted from the B-side lithium pressing mechanism (20) is rolled in a third back film rolling mechanism (22).
CN202210533552.3A 2022-05-17 2022-05-17 Pressing and covering integrated negative plate lithium supplementing device and lithium supplementing method Withdrawn CN114709374A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210533552.3A CN114709374A (en) 2022-05-17 2022-05-17 Pressing and covering integrated negative plate lithium supplementing device and lithium supplementing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210533552.3A CN114709374A (en) 2022-05-17 2022-05-17 Pressing and covering integrated negative plate lithium supplementing device and lithium supplementing method

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CN114709374A true CN114709374A (en) 2022-07-05

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