WO2021012773A1 - Nouvelle presse à rouleaux précise sans effet d'étirement - Google Patents

Nouvelle presse à rouleaux précise sans effet d'étirement Download PDF

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Publication number
WO2021012773A1
WO2021012773A1 PCT/CN2020/091944 CN2020091944W WO2021012773A1 WO 2021012773 A1 WO2021012773 A1 WO 2021012773A1 CN 2020091944 W CN2020091944 W CN 2020091944W WO 2021012773 A1 WO2021012773 A1 WO 2021012773A1
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WO
WIPO (PCT)
Prior art keywords
roller press
electrode sheet
shaping
soft
thickness
Prior art date
Application number
PCT/CN2020/091944
Other languages
English (en)
Chinese (zh)
Inventor
杨志明
周华民
陶波
张云
黄志高
Original Assignee
深圳市信宇人科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市信宇人科技股份有限公司 filed Critical 深圳市信宇人科技股份有限公司
Publication of WO2021012773A1 publication Critical patent/WO2021012773A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/021—Rolls for sheets or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/58—Roll-force control; Roll-gap control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling

Definitions

  • the invention relates to a roller press for compacting lithium battery pole pieces, in particular to a new type of non-extension precision roller press.
  • the present invention provides the society with a new type of non-extension precision roller press which can effectively prevent the lithium battery pole pieces from extending during the rolling process.
  • the technical solution of the present invention is to provide a new type of non-extension precision roller press, an unwinding mechanism and a winding mechanism, between the unwinding mechanism and the winding mechanism, a preheating mechanism is sequentially arranged from the unwinding mechanism A roller press, a soft roller press and a shaping roller press, wherein the preheating roller press compresses the electrode sheet under heating, and the compression ratio of the preheating roller press is 30%-40%;
  • the movable roller of the soft roller press is located on the soft rubber pad, and the electrode sheet is compressed by the soft rubber pad.
  • the compression ratio of the soft roller press is 30%-40%;
  • the electrode sheet is shaped and compressed to ensure that the thickness of the electrode sheet is consistent, and the compression ratio of the shaping roller press is 20%-40%.
  • the preheating roller press and the soft roller press are provided with a first thickness gauge, and the first thickness gauge measures the measured electrode sheet compressed by the preheating roller press The thickness value of is fed back to the control circuit, and the control circuit adjusts the roll gap of the preheating roller press according to the measured thickness value to ensure that the thickness of the electrode sheet after preheating and rolling is within the first predetermined thickness range.
  • a second thickness gauge is provided on the soft roll press and the shaping roll press, and the second thickness gauge measures the thickness of the electrode sheet after being compressed by the soft roll press The value is fed back to the control circuit, and the control circuit adjusts the roll gap of the soft roll press according to the measured thickness value to ensure that the thickness of the electrode sheet after the soft roll press is within the second predetermined range.
  • a third thickness gauge is provided between the shaping roller press and the winding mechanism, and the third thickness gauge measures the measured value of the electrode sheet compressed by the shaping roller press.
  • the thickness value is fed back to the control circuit, and the control circuit adjusts the roll gap of the shaping roller press according to the measured thickness value to ensure that the thickness of the electrode sheet after shaping and rolling is within the third predetermined range.
  • the roll diameter of the preheating roller press is 400mm, and the preheating roller press is 50t-60t.
  • the heating temperature of the preheating roller press is selected between 120°C and 130°C.
  • the roll diameter of the soft roll press is 400mm, and the soft roll press pressure is 80t-90t.
  • the roller diameter of the shaping roller press is 800mm, and the roller diameter of the shaping roller is 180t-200t.
  • the first thickness gauge, the second thickness gauge and the first thickness gauge are laser thickness gauges.
  • the present invention adopts multi-stage and different methods and different compression ratios to compress the electrode sheet, it can basically achieve no stretching effect on the electrode sheet, and therefore, does not cause the active material on both sides of the electrode to be weakly bonded to the substrate , There are problems such as position movement and deformation.
  • Figure 1 is a schematic plan view of an embodiment of the present invention.
  • Fig. 2 is a schematic structural diagram of another embodiment of the soft roller press in Fig. 1.
  • Fig. 3 is a schematic diagram of the preheating rolling effect in Fig. 1.
  • Figure 4 is a schematic diagram of the soft rolling effect in Figure 1.
  • Fig. 5 is a schematic diagram of the effect of shaping and rolling in Fig. 1.
  • Figures 1 to 5 show a new type of non-extension precision roller press, the unwinding mechanism 1 and the winding mechanism 2, between the unwinding mechanism 1 and the winding mechanism 2.
  • the preheating roller press 3 compresses the electrode sheet 6 under heating
  • the compression ratio of the preheating roller press 3 is 30%-40%;
  • the movable roller 41 of the soft roller press 4 is located on the soft rubber pad 42, and the electrode sheet 6 is compressed by the soft rubber pad 42,
  • the compression ratio of the soft roller press 4 is 30%-40%;
  • the shaping roller press 5 performs shaping and compression on the electrode sheet 6 to ensure that the thickness of the electrode sheet 6 is consistent.
  • the compression ratio of 5 is 20%-40%.
  • the pressing roller of the preheating roller press 3 may be an electric heating roller or an oil heating roller.
  • the present invention and the compression of the electrode sheet with different compression ratios can basically achieve no stretching effect on the electrode sheet. Therefore, it will not cause the active material on both sides of the electrode to be weakly bonded to the base material, causing problems such as position shift and deformation. . Through multi-stage grading and gradual rolling, it can effectively reduce the horizontal and vertical extension of the pole piece during the rolling process, and avoid the wrinkles and other defects caused by the extension of the pole piece.
  • the soft roller press 4 has two different structural forms. The first one is as shown in FIG. 1.
  • the soft rubber pad 42 is a circulating belt-like structure 43, which is different from the soft roller press 4
  • the direction of rotation of the upper roller is the same; the second is that the soft rubber pad 42 has a single-belt structure 44, as shown in Figure 2, the soft rubber pad 42 is placed from one side to the other side, and the other side is retracted.
  • the length of the soft rubber pad 42 is preferably greater than or equal to the length of the electrode sheet 6, so as to ensure that the soft rubber pad 42 can always be cushioned on the roll gap of the soft roller press 4 during the rolling process of the electrode sheet 6 between.
  • the advantage of using the soft rubber pad 4 is that the line contact of the roller press can be changed to surface contact to prevent the spread of the electrode sheet 6 from occurring.
  • the soft rubber pad 4 in the present invention can be made of PET or PPO plastic.
  • the preheating roller press 3 and the soft roller press 4 are provided with a first thickness gauge 31, and the first thickness gauge 31 measures the measured value compressed by the preheating roller press 3
  • the thickness value of the electrode sheet 6 is fed back to the control circuit 7, and the control circuit 7 adjusts the roll gap of the preheating roller press 3 according to the measured thickness value to ensure that the thickness of the electrode sheet 6 after preheating and rolling is at the first predetermined thickness.
  • the control circuit 7 adjusts the roll gap of the preheating roller press 3 according to the measured thickness value to ensure that the thickness of the electrode sheet 6 after preheating and rolling is at the first predetermined thickness.
  • the soft roller press 4 and the shaping roller press 5 are provided with a second thickness gauge 41, and the second thickness gauge 41 measures the measured electrode sheet compressed by the soft roller press 4
  • the thickness value of 6 is fed back to the control circuit 7, and the control circuit 7 adjusts the roll gap of the soft roll press 4 according to the measured thickness value to ensure that the thickness of the electrode sheet 6 after the soft roll press is within the second predetermined range.
  • a third thickness gauge 51 is provided between the shaping roller press 5 and the winding mechanism 2, and the third thickness gauge 51 measures the measured electrodes compressed by the shaping roller press 5
  • the thickness value of the sheet 6 is fed back to the control circuit 7, and the control circuit 7 adjusts the roll gap of the shaping roller press 5 according to the measured thickness value to ensure that the thickness of the electrode sheet 6 after shaping and rolling is within the third predetermined range.
  • the roller diameter of the preheating roller press 3 is 400 mm, and the preheating roller press is 50t-60t.
  • the heating temperature of the preheating roller press 3 is selected between 120°C and 130°C.
  • the roll diameter of the soft roll press 4 is 400 mm, and the soft roll pressure is 80t-90t.
  • the roller diameter of the shaping roller press 5 is 800 mm, and the roller diameter of the shaping roller press is 180t-200t.
  • the first thickness gauge 31, the second thickness gauge 41 and the first thickness gauge 51 are laser thickness gauges.
  • the electrode sheet with a thickness of 0.254mm can be used. After the first stage of preheating and rolling, it can reach 0.206mm, the second stage of soft rolling can reach 0.159mm, and the third stage of shaping and rolling can reach 0.135mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

L'invention concerne une presse à rouleaux précise sans effet d'étirement, comprenant un mécanisme de déroulement (1) et un mécanisme d'enroulement (2), une presse à rouleaux de préchauffage (3), une presse à rouleaux souples (4) et une presse à rouleaux de mise en forme (5) étant disposées séquentiellement dans la direction allant du mécanisme de déroulement au mécanisme d'enroulement, entre le mécanisme de déroulement et le mécanisme d'enroulement. La presse à rouleaux de préchauffage réalise une compression sur une feuille d'électrode dans une condition de chauffage, le taux de compression de la presse à rouleaux de préchauffage étant de 30 à 40 %; un rouleau mobile de la presse à rouleaux souples est situé au-dessus d'un tampon en caoutchouc souple, la feuille d'électrode étant comprimée par le tampon en caoutchouc souple et le taux de compression de la presse à rouleaux souples étant de 30 à 40 %; et la presse à rouleaux de mise en forme effectue une compression de mise en forme sur la feuille d'électrode de manière à assurer l'uniformité de l'épaisseur de la feuille d'électrode, le taux de compression de la presse à rouleaux de mise en forme allant de 20 à 40 %. La presse à rouleaux précise sans effet d'étirement peut empêcher efficacement l'étirement d'une feuille d'électrodes d'une batterie au lithium pendant le laminage.
PCT/CN2020/091944 2019-07-24 2020-05-23 Nouvelle presse à rouleaux précise sans effet d'étirement WO2021012773A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910671986.8A CN110404980A (zh) 2019-07-24 2019-07-24 新型无延展精密辊压机
CN201910671986.8 2019-07-24

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WO2021012773A1 true WO2021012773A1 (fr) 2021-01-28

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WO (1) WO2021012773A1 (fr)

Cited By (1)

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CN114535934A (zh) * 2022-02-23 2022-05-27 上海兰钧新能源科技有限公司 一种极片辊压方法及极片

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CN110404980A (zh) * 2019-07-24 2019-11-05 深圳市信宇人科技股份有限公司 新型无延展精密辊压机
CN110934322B (zh) * 2020-01-07 2021-12-03 湖北中烟工业有限责任公司 一种四锟压机压制烟草薄片的方法和系统
CN112768631B (zh) * 2021-01-07 2024-05-10 上海兰钧新能源科技有限公司 电池极片及其压花辊压工艺

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