WO2017107232A1 - 压延装置 - Google Patents

压延装置 Download PDF

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Publication number
WO2017107232A1
WO2017107232A1 PCT/CN2015/099533 CN2015099533W WO2017107232A1 WO 2017107232 A1 WO2017107232 A1 WO 2017107232A1 CN 2015099533 W CN2015099533 W CN 2015099533W WO 2017107232 A1 WO2017107232 A1 WO 2017107232A1
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WO
WIPO (PCT)
Prior art keywords
calender roll
calendering
film
oblique block
roll
Prior art date
Application number
PCT/CN2015/099533
Other languages
English (en)
French (fr)
Inventor
张祥领
Original Assignee
广东基泰智能设备有限公司
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 广东基泰智能设备有限公司 filed Critical 广东基泰智能设备有限公司
Publication of WO2017107232A1 publication Critical patent/WO2017107232A1/zh

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/04Processes of manufacture in general
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/04Processes of manufacture in general
    • H01M4/043Processes of manufacture in general involving compressing or compaction
    • H01M4/0435Rolling or calendering
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the present invention relates to the field of calenders, and more particularly to a calendering apparatus.
  • the lithium-receiving process of the lithium-ion battery pole piece is the key technology to improve the capacity of the lithium-ion battery.
  • the key to the lithium-replenishing process is the pressing and laminating, and the calendering process is to have a thickness of 0.25 mm ⁇ 0.5.
  • micro-deformation occurs, which causes the film to be rolled to be thick in the middle and thin on both sides, thereby reducing the quality of the lithium film.
  • the technical problem to be solved by the present invention is to provide a calendering apparatus in view of the above-mentioned drawbacks in the prior art.
  • the present invention also provides a calendering apparatus comprising a first calender roll and a second calender roll disposed in parallel, the first calender roll being coated with a first release film, and the second calender roll coated There is a second separator, the release force of the first separator is greater than the release force of the second separator, and the material adheres to the first calender roll and the second calender roll.
  • the outer surfaces of the first calender roll and the second calender roll are both curved surfaces.
  • a fine adjustment gap mechanism is disposed between the first calender roll and the second calender roll, and the fine adjustment gap mechanism includes a motor, a screw rod, a first oblique block, a second oblique block, a third oblique block and a fourth oblique block;
  • the motor is drivingly connected to the screw rod, and the screw rod drives the first oblique block to move along an axial direction of the screw rod by a thread structure, the first oblique block and the second oblique block Block sliding connection and driving said
  • the second oblique block moves up and down, one end of the third oblique block is fixed on the second inclined block, and the other end of the third inclined block extends to the first calender roll and the second calender roll
  • the fourth oblique block is fixed to the first calender roll or the second calender roll, and the third oblique block moves the fourth oblique block to the left and right during up and down movement.
  • a row of rollers is respectively disposed on both sides of the third oblique block.
  • a first bearing block is disposed at both ends of the first calendering roll, and a second bearing block is disposed at both ends of the second calendering roll, the second bearing A pressure applying mechanism is provided on the seat.
  • the pressure applying mechanism includes a cylinder and a pressure sensor, the cylinder is fixed to the frame, and the pressure sensor is fixed on the second bearing seat and located at the Between the second bearing seat and the cylinder, the pressure sensor senses that the actual applied pressure of the cylinder on the second bearing seat is greater than or less than a preset value, and the cylinder is controlled to change the output pressure.
  • the first bearing housing is fixed to a frame, and the frame is provided with an upper guiding seat and a lower guiding seat, the upper guiding seat and the lower guiding The seat clamps the second bearing housing.
  • the material is calendered into a film by the first calender roll and the second calender roll, and the film is attached to the first separator, the film A color scale sensor is disposed on each side of the film, and the color code sensor is located at an edge of the film width direction.
  • the film has a thickness of 0.003 mm to 0.005 mm.
  • the material is a lithium film.
  • the diameter of both ends of the first calendering roll is smaller than the diameter of the middle of the first calendering roll, and the diameter of the two ends of the second calendering roll is smaller than the middle of the second calendering roll diameter of.
  • a calendering apparatus embodying the present invention has the following advantageous effects: First, the centrifugal force of the separator coated on the two calender rolls is different, so that the calendered film adheres to The separator with a large centrifugal force is carried away by the separator. Secondly, the two calender rolls are arcuate rolls, so that the calendered film is more uniform, and the film which is rolled out is prevented from being thick in the middle and thin at both ends. Third, the present application adopts a closed-loop control of the magnitude of the applied pressure so that the applied pressure operates smoothly in a small range.
  • a fine adjustment gap mechanism is disposed between the two calender rolls to adjust the working gap between the two calender rolls, so that the application
  • the calendering device can calender different thicknesses of incoming material.
  • the two sides of the lithium film are respectively provided with color-coded sensors, and the two color-coded sensors are located at the edge of the width direction of the lithium film, so that an alarm signal is generated in the abnormality of the correction system, and the system is stopped.
  • the calendering apparatus of the present application can calender a lithium strip having a thickness of 0.25 mm to 0.5 mm into a lithium film having a thickness of 0.003 mm to 0.005 mm by multiple calendering.
  • FIG. 1 is a schematic structural view of a calendering apparatus according to an embodiment of the present invention.
  • FIG. 2 is a schematic view showing a unwinding mechanism and a winding mechanism of a separator of the rolling device shown in FIG. 1;
  • FIG. 3 is a schematic view of a fine adjustment gap mechanism of the calendering apparatus shown in FIG. 1.
  • a calendering apparatus includes a first calender roll 1 and a second calender roll 2 disposed in parallel, and the first calender roll 1 is coated with a first isolation.
  • the film 3, the second calender roll 2 is coated with a second separator 4, the release force of the first separator 3 is greater than the release force of the second separator 4, and the material 500 is at the first calender roll 1 and the second calender
  • the roller 2 is adhered to the first separator 3 under the pressing, and the outer surfaces of the first calender roll 1 and the second calender roll 2 are both curved surfaces.
  • the calendering apparatus of the present invention may be of 0.25mm thickness greater than 500 rolled to a thickness of 0.003 ⁇ 0.005 m m film.
  • the material 500 of the embodiment is a lithium strip. Due to the difference in the thickness of the incoming material of the lithium strip, the calendering device can calender a lithium strip having a thickness of 0.25 mm to 0.5 mm into a thickness of 0.003 mm to 0.005 mm by multiple calendering. membrane. It can be understood that the present application does not limit the specific material of the material 500, and the material may also be a copper strip or the like.
  • the release force of the two separators of the present application is different, and the rolled lithium film is attached to the separator having a large release force and is carried. go.
  • the release force of the first isolation film 3 is greater than the release force of the second isolation film 4, and the lithium film is attached to the first isolation film 3 and carried away by the first isolation film 3.
  • the calendering apparatus includes a frame (not numbered), and the frame is provided with a feeding mechanism, a roller mechanism, a fine adjustment gap mechanism 5, a color mark sensor 6, and a pressing mechanism 7.
  • the roller mechanism includes a first calender roll 1 and a second calender roll 2, and a first bearing block 10 is disposed at both ends of the first calender roll 1, and a second bearing block 20 is disposed at both ends of the second calender roll 2,
  • the feeding mechanism feeds the material 500 (e.g., lithium tape) between the first calender roll 1 and the second calender roll 2.
  • the two calender rolls of the present application are respectively connected to two servo motors, and are driven by the servo motor. Since the transmission connection between the calender rolls and the servo motor is a conventional technique in the prior art, the specific connection is The manner and structure are not described here.
  • the pressing mechanism 7 is used for applying pressure to the calender rolls, and the pressing force is respectively located at the bearing positions at both ends of the calender rolls, and the roll surface is slightly deformed due to the pressing pressure of the calender rolls under a large pressure (greater than 3T). Phenomenon, the lithium film that is rolled out will appear thick in the middle and thin at both ends.
  • the first calender roll 1 and the second calender roll 2 of the present application are both arcuate rolls, that is, the middle of the calender rolls is large, the ends are small, and the entire roll surface is curved.
  • the calender roll rolls the lithium strip into a lithium film under the application pressure of the pressing mechanism 7, and causes the lithium film to adhere to the separator.
  • the pressing force of the pressing mechanism 7 acts on the second calendering roller 2.
  • the pressing mechanism 7 includes a cylinder 71 and a pressure sensor 72.
  • the cylinder 71 is fixed to the frame, and the pressing force of the cylinder 71 acts in the second.
  • the second calender roll 2 is pressed against the lithium strip; the pressure sensor 72 is used to sense the actual applied pressure of the cylinder 71, the pressure sensor 72 is fixed on the second bearing housing 20, and is located in the cylinder 71 and the second bearing Between the seats 20.
  • the present application adopts a closed-loop control of the magnitude of the applied pressure so that the applied pressure operates smoothly in a small range.
  • the controller (not shown) sets a preset value for the applied pressure, and the pressure sensor 72 senses the actual applied pressure. If the actual applied pressure is greater than or less than the preset value, the controller issues a command to adjust the pressure of the oil supply to the oil cylinder 71. Thus, the relative balance of the applied pressure is achieved by changing the output pressure of the cylinder 71.
  • the upper guide wheel 300 and the lower guide wheel 400 are further disposed on the frame, and the upper guide wheel 300 and the lower guide wheel 400 are separately provided.
  • the function of the second bearing housing 20 is to flexibly move the left and right sides to withstand greater radial forces.
  • the second calendering roll 2 is a pressing roll.
  • a working gap for rolling the lithium strip is formed between the first calender roll 1 and the second calender roll 2. Since the thickness of the incoming strip of the lithium strip is different, the required working gap is also different, so the calendering force is not The size of the working gap is particularly important in the case of a change.
  • a fine adjustment gap mechanism 5 is provided between the first calender roll 1 and the second calender roll 2, and the fine adjustment gap mechanism 5 is used to adjust the working gap between the first calender roll 1 and the second calender roll 2. size.
  • the fine adjustment gap mechanism 5 includes a motor 51, a reducer 52, a guide rail 53, a lead screw 54, a first oblique block 55, a second oblique block 56, a third oblique block 57, and a fourth oblique block. 58 and roller 59.
  • the motor 51 and the guide rail 53 are respectively fixed on the frame, and the motor 51 is drivingly connected with the speed reducer 52.
  • One end of the screw rod 54 is connected to the speed reducer 52, and is driven by the speed reducer 52, and the screw rod 54 is driven.
  • the other end is connected to the first inclined block 55 by a threaded structure, and the first inclined block 55 is slidably coupled to the guide rail 53.
  • the second oblique block 56 is slidably coupled to the first oblique block 55, and the first oblique block 55 and the second oblique block 56 are provided with an inclined surface at the junction of the second oblique block 55, and the first oblique block 55 makes the second oblique block during sliding. 56 slide up and down.
  • one end of the second oblique block 56 is provided with a finite block (not labeled) to limit the displacement of the second oblique block 56 in the horizontal direction, so that the second oblique block 56 can only move up and down.
  • One end of the third oblique block 57 is fixed to the upper surface of the second inclined block 56, and the other end of the third inclined block 57 is embedded between the first calender roll 1 and the second calender roll 2, and the fourth oblique block 58
  • the sliding connection, the third oblique block 57 is fixed on the second inclined block 56 and moves up and down following the second inclined block 56.
  • the fourth oblique block 58 is fixed on the first bearing housing 10 or the second bearing housing 20.
  • the connection between the third oblique block 57 and the fourth oblique block 58 is provided with an inclined surface, and the third oblique block 57 is moved up and down.
  • the four inclined blocks 58 are moved left and right to change the size of the working gap between the first calender roll 1 and the second calender roll 2.
  • the fine adjustment precision is improved, and two of the third oblique blocks 57 are
  • the force receiving surface is provided with two rows of rollers 59.
  • the fourth oblique block 58 is fixed on the first bearing housing 10, between the third oblique block 57 and the second bearing housing 20, and between the third oblique block 57 and the fourth oblique block respectively.
  • a row of rollers 59 is provided.
  • First oblique block 55 and the first The inclination between the two oblique blocks 56 is 10:0.8, the inclination between the third oblique block 57 and the fourth oblique block 58 is 10: 1.
  • 25 the lead of the screw rod 54 is 2 mm, the speed reducer The speed ratio is 60:1.
  • the starter motor 51 drives the speed reducer 52 to rotate, the speed reducer 52 rotates once, and the working gap between the two calender rolls changes by 0.02 mm, and the motor 51 rotates one turn and the working gap between the two calender rolls changes by 0.0003333 mm.
  • the color code sensor 6 is mounted on the side of the first calender roll 1 away from the second calender roll 2, and the laser beam of the color mark sensor 6 is perpendicular to the center of the first calender roll 1.
  • the color code sensor 6 includes two, and the two color code sensors 6 are disposed on both sides of the lithium film and located at the edge of the width direction of the lithium film.
  • Normal production ⁇ the lithium film adheres to the first separator 3, is carried away by the first separator 3, and does not adhere to the first calender roll 1.
  • the center portion of the lithium film and the first separator 3 overlap, and the lithium film cannot be completely carried away by the first separator 3, and adheres to the first calender roll 1. Since the color of the lithium film is different from that of the first calendering roll 1, the color sensor 6 senses the lithium film attached to the calender roll, and an alarm signal is issued, and the system is stopped.
  • a calendering apparatus embodying the present invention has the following advantageous effects: First, the centrifugal force of the separator coated on the two calender rolls is different, so that the calendered film adheres to The separator with a large centrifugal force is carried away by the separator. Secondly, the two calender rolls are arcuate rolls, which make the calendered film more uniform, and avoid the phenomenon that the film which is rolled out is thick at the middle and thin at both ends. Third, the application adopts a closed-loop control of the magnitude of the applied pressure so that the applied pressure operates smoothly in a small range.
  • a fine adjustment gap mechanism is provided between the two calender rolls to adjust the working gap between the two calender rolls, so that the calendering device of the present application can calender different thicknesses.
  • the two sides of the lithium film are respectively provided with color-coded sensors, and the two color-coded sensors are located at the edge of the width direction of the lithium film, so that an alarm signal is generated in the abnormality of the correction system, and the system is stopped.
  • the calendering apparatus of the present application can calender a lithium strip having a thickness of 0.25 mm to 0.5 mm into a lithium film having a thickness of 0.003 mm to 0.005 mm by multiple calendering.

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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)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

一种压延装置,包括平行设置的第一压延辊(1)和第二压延辊(2),所述第一压延辊(1)上包覆有第一隔离膜(3),所述第二压延辊(2)上包覆有第二隔离膜(4),所述第一隔离膜(3)的离型力大于所述第二隔离膜(4)的离型力,物料在所述第一压延辊(1)与所述第二压延辊(2)的挤压下附着在所述第一隔离膜(3)上,所述第一压延辊(1)与所述第二压延辊(2)的外表面均为弧面。该装置具有以下有益效果:包覆在两个压延辊上的隔离膜的离型力的大小不同,以使压延后的薄膜粘附在离型力大的隔离膜上并被该隔离膜带走,并且两个压延辊为弧面辊,使压延出来的薄膜更均匀,避免压延出来的薄膜出现中间厚、两端薄的现象。

Description

说明书 发明名称:压延装置
技术领域
[0001] 本发明涉及一种压延机领域, 尤其涉及一种压延装置。
背景技术
[0002] 在电池生产过程中, 锂离子电池极片的补锂工艺是提高锂离子电池容量的关键 技术, 补锂工艺的关键在于压研与覆膜, 压延工艺就是把厚度为 0.25mm~0.5mm 的锂带压延成锂膜, 并附着在牵引薄膜上的一种工艺。 现有技术中, 很难将锂 带的压延成厚度为 0.003~0.005m的薄膜, 且由于施压力作用在压延辊的两端的轴 承位上, 在较大压力 (左右各 3T~5T) 施压下, 压延辊的辊面会产生微变形, 导 致压延出来的薄膜会中间厚、 两边薄, 降低锂膜的质量。
技术问题
[0003] 本发明要解决的技术问题在于, 针对现有技术中的上述缺陷, 提供一种压延装 置。
问题的解决方案
技术解决方案
[0004] 本发明解决其技术问题所采用的技术方案是:
[0005] 本发明还提供一种压延装置, 包括平行设置的第一压延辊和第二压延辊, 所述 第一压延辊上包覆有第一隔离膜, 所述第二压延辊上包覆有第二隔离膜, 所述 第一隔离膜的离型力大于所述第二隔离膜的离型力, 物料在所述第一压延辊与 所述第二压延辊的挤压下附着在所述第一隔离膜上, 所述第一压延辊与所述第 二压延辊的外表面均为弧面。
[0006] 在本发明所述的压延装置中, 所述第一压延辊与所述第二压延辊之间设置有微 调间隙机构, 所述微调间隙机构包括电机、 丝杆、 第一斜块、 第二斜块、 第三 斜块及第四斜块;
[0007] 所述电机与所述丝杆传动连接, 所述丝杆通过螺纹结构带动所述第一斜块沿所 述丝杆的轴线方向移动, 所述第一斜块与所述第二斜块滑动连接、 并带动所述 第二斜块上下移动, 所述第三斜块的一端固定在所述第二斜块上, 所述第三斜 块的另一端延伸至所述第一压延辊与所述第二压延辊之间, 所述第四斜块固定 在所述第一压延辊或所述第二压延辊上, 所述第三斜块在上下移动中使所述第 四斜块左右移动。
[0008] 在本发明所述的压延装置中, 所述第三斜块的两侧分别设置有一排辊子。
[0009] 在本发明所述的压延装置中, 所述第一压延辊的两端设置有第一轴承座, 所述 第二压延辊的两端设置有第二轴承座, 所述第二轴承座上设置有施压机构。
[0010] 在本发明所述的压延装置中, 所述施压机构包括油缸及压力传感器, 所述油缸 固定在机架上, 所述压力传感器固定在所述第二轴承座上、 并位于所述第二轴 承座与所述油缸之间, 在所述压力传感器感应所述油缸作用在所述第二轴承座 上的实际施压力大于或小于预设值吋, 控制所述油缸改变输出压力。
[0011] 在本发明所述的压延装置中, 所述第一轴承座固定在机架上, 所述机架上设置 有上导向座与下导向座, 所述上导向座与所述下导向座夹紧所述第二轴承座。
[0012] 在本发明所述的压延装置中, 所述物料被所述第一压延辊与所述第二压延辊压 延成薄膜, 所述薄膜附着在所述第一隔离膜上, 所述薄膜的两侧分别设置有色 标传感器, 所述色标传感器位于所述薄膜幅宽方向的边缘。
[0013] 在本发明所述的压延装置中, 所述薄膜的厚度为 0.003 mm ~0.005mm。
[0014] 在本发明所述的压延装置中, 所述物料为锂膜。
[0015] 在本发明所述的压延装置中, 所述第一压延辊两端的直径小于所述第一压延辊 中部的直径, 所述第二压延辊两端的直径小于所述第二压延辊中部的直径。 发明的有益效果
有益效果
[0016] 综上所述, 实施本发明的一种压延装置, 具有以下有益效果: 首先, 包覆在两 个压延辊上的隔离膜的离心力的大小不同, 以使压延后的薄膜粘附在离心力大 的隔离膜上并被该隔离膜带走。 其次, 两个压延辊为弧面辊, 使压延出来的薄 膜更均匀, 避免压延出来的薄膜出现中间厚、 两端薄的现象。 第三, 本申请采 用闭环控制施压力的大小, 使施压力在很小的范围内平稳运作。 第四, 两个压 延辊之间设置有微调间隙机构, 以调节两个压延辊之间的工作间隙, 使本申请 的压延装置能压延不同厚度来料。 第五, 锂膜的两侧分别设置有色标传感器, 两个色标传感器位于锂膜幅宽方向的边缘, 以使在纠偏***出现异常吋发出报 警信号, 并使***停机。 最后, 本申请的压延装置通过多次压延可以将厚度为 0. 25mm~0.5mm的锂带压延成厚度为 0.003 mm ~0.005mm的锂膜。
对附图的简要说明
附图说明
[0017] 下面将结合附图及实施例对本发明作进一步说明, 附图中:
[0018] 图 1是本发明实施例提供的一种压延装置的结构示意图;
[0019] 图 2是图 1所示压延装置的隔离膜的放卷机构及收卷机构的示意图;
[0020] 图 3是图 1所示压延装置的微调间隙机构的示意图。
本发明的实施方式
[0021] 为了使本发明的目的、 技术方案及优点更加清楚明白, 以下结合附图及实施例 , 对本发明进行进一步详细说明。 应当理解, 此处所描述的具体实施例仅仅用 以解释本发明, 并不用于限定本发明。
[0022] 如图 1所示, 本发明较佳实施例提供的一种压延装置, 包括平行设置的第一压 延辊 1和第二压延辊 2, 第一压延辊 1上包覆有第一隔离膜 3, 第二压延辊 2上包覆 有第二隔离膜 4, 第一隔离膜 3的离型力大于第二隔离膜 4的离型力, 物料 500在 第一压延辊 1与第二压延辊 2的挤压下粘附在第一隔离膜 3上, 第一压延辊 1与第 二压延辊 2的外表面均为弧面。
[0023] 本发明的压延装置可以将厚度大于 0.25mm的物料 500压延成厚度为 0.003~0.005 mm的薄膜。 本实施例的物料 500为锂带, 由于锂带的来料厚度有差别, 上述压 延装置通过多次压延可以将厚度为 0.25mm~0.5mm的锂带压延成厚度为 0.003 mm ~0.005mm的锂膜。 可以理解的是, 本申请并不限定物料 500的具体材质, 物料还 可以为铜带等。
[0024] 在压延过程中, 为了不使锂膜粘附在第一压延辊 1和第二压延辊 2上, 需要在两 个压延辊与锂膜之间设置隔离膜, 以使锂膜与两个压延辊相隔离。 结合图 2所示 , 隔离膜的两端分别连接在放卷机构 100与收卷机构 200上, 由于放卷机构 100与 收卷机构 200均为现有技术的惯用技术手段, 其具体结构在此不再赘述。 为了避 免压延好的锂膜同吋附着在两个隔离膜上, 本申请的两个隔离膜的离型力的大 小不同, 压延好的锂膜附着在离型力大的隔离膜上并被带走。 本实施例中, 第 一隔离膜 3的离型力大于第二隔离膜 4的离型力, 锂膜附着在第一隔离膜 3上、 并 被第一隔离膜 3带走。
[0025] 如图 1所示, 压延装置包括机架 (未标号) , 机架上设置有入料机构、 辊轮机 构、 微调间隙机构 5、 色标传感器 6和施压机构 7。 其中, 辊轮机构包括第一压延 辊 1和第二压延辊 2, 第一压延辊 1的两端设置有第一轴承座 10, 第二压延辊 2的 两端设置有第二轴承座 20, 入料机构将物料 500 (如锂带) 送入第一压延辊 1与 第二压延辊 2之间。 本申请的两个压延辊分别与两个伺服电机传动连接, 并在伺 服电机的带动下转动, 由于压延辊与伺服电机之间的传动连接为现有技术中的 惯用技术手段, 故其具体连接方式与结构在此不再赘述。
[0026] 施压机构 7用于对压延辊施加压力, 施压力分别位于压延辊两端的轴承位上, 由于压延辊在较大压力 (大于 3T) 的施压过程中, 辊面会产生微变形的现象, 导致压延出来的锂膜会出现中间厚、 两端薄的现象。 为了克服这种现象, 本申 请的第一压延辊 1与第二压延辊 2均为弧面辊, 就是压延辊的中间大, 两端小, 整个辊面呈弧形。
[0027] 压延辊在施压机构 7的施压力下将锂带压延成锂膜, 并使锂膜附着在隔离膜上 。 本实施例中, 施压机构 7的施压力作用在第二压延辊 2上, 施压机构 7包括油缸 71和压力传感器 72, 油缸 71固定在机架上, 油缸 71的施压力作用在第二压延辊 2 上, 以使第二压延辊 2压紧锂带; 压力传感器 72用于感应油缸 71的实际施压力, 压力传感器 72固定在第二轴承座 20上, 并位于油缸 71与第二轴承座 20之间。
[0028] 由于施压力的大小也是决定压延锂膜质量的要素, 本申请采用闭环控制施压力 的大小, 使施压力在很小的范围内平稳运作。 具体的, 控制器 (未示出) 对施 压力设定一预设值, 压力传感器 72感应实际施压力, 如果实际施压力大于或小 于预设值, 控制器发出指令调节油缸 71供油的压强, 从而通过改变油缸 71的输 出压力来达到施压力的相对平衡。
[0029] 机架上还设置有上导向轮 300和下导向轮 400, 上导向轮 300与下导向轮 400分设 在第二轴承座 20的上下方, 并用于夹紧第二轴承座 20的上下位置。 由于第二轴 承座 20在压延过程中会受到很大的上下径向作用力, 如果只是靠导柱 (未示出 ) 受力, 不仅会损坏导向件, 而且也不稳定, 上、 下导向轮的作用就是让第二 轴承座 20灵活的左右移动的同吋, 能承受更大的径向力。 本实施例中, 第二压 延辊 2为施压辊。
[0030] 第一压延辊 1与第二压延辊 2之间形成有用于压延锂带的工作间隙, 由于锂带的 来料厚度有差别, 所需要的工作间隙也不相同, 故在压延力不变的情况下工作 间隙的大小就显得特别重要。 本实施例中, 第一压延辊 1与第二压延辊 2之间设 置有微调间隙机构 5, 该微调间隙机构 5用于调节第一压延辊 1与第二压延辊 2之 间的工作间隙的大小。
[0031] 如图 3所示, 微调间隙机构 5包括电机 51、 减速机 52、 导轨 53、 丝杆 54、 第一斜 块 55、 第二斜块 56、 第三斜块 57、 第四斜块 58及辊子 59。 其中, 电机 51与导轨 5 3分别固定在机架上, 电机 51与减速机 52传动连接, 丝杆 54的一端连接在减速机 52上, 并在减速机 52的带动下转动, 丝杆 54的另一端通过螺纹结构连接在第一 斜块 55上, 第一斜块 55可滑动的连接在导轨 53上。 第二斜块 56可滑动的连接在 第一斜块 55的上方, 第一斜块 55与第二斜块 56的连接处设置有倾斜面, 第一斜 块 55在滑动中使第二斜块 56上下滑动。 优选的, 第二斜块 56的一端设置有限位 块 (未标号) , 以限制第二斜块 56在水平方向的位移, 使第二斜块 56只能上下 移动。 第三斜块 57的一端固定在第二斜块 56的上表面, 第三斜块 57的另一端嵌 设在第一压延辊 1与第二压延辊 2之间, 并与第四斜块 58滑动连接, 第三斜块 57 固定在第二斜块 56上并跟随第二斜块 56上下移动。 第四斜块 58固定在第一轴承 座 10或第二轴承座 20上, 第三斜块 57与第四斜块 58的连接处设置有倾斜面, 第 三斜块 57在上下移动中使第四斜块 58左右移动, 从而改变第一压延辊 1与第二压 延辊 2之间工作间隙的大小。
[0032] 优选的, 为了减少第三斜块 57与第四斜块 58之间, 以及第三斜块 57与轴承座之 间的摩擦力, 提高微调精度, 在第三斜块 57的两个受力面设置有两排辊子 59。
[0033] 本实施例中, 第四斜块 58固定在第一轴承座 10上, 第三斜块 57与第二轴承座 20 之间, 及第三斜块 57与第四斜块之间分别设置有一排辊子 59。 第一斜块 55与第 二斜块 56配合之间的斜度为 10:0.8, 第三斜块 57与第四斜块 58之间的斜度为 10: 1. 25, 丝杆 54的导程为 2mm, 减速机的速比为 60: 1。 要调整工作间隙吋, 启动电机 51带动减速机 52转动, 减速机 52转动一圈两压延辊之间的工作间隙改变 0.02mm , 电机 51转动一圈两压延辊之间的工作间隙改变 0.0003333mm。
[0034] 如图 1所示, 色标传感器 6安装在第一压延辊 1远离第二压延辊 2的一侧, 色标传 感器 6的激光束垂直于第一压延辊 1的圆心。 本实施例中, 色标传感器 6包括两个 , 两个色标传感器 6分设在锂膜的两侧, 并位于锂膜幅宽方向的边缘。 正常生产 吋, 锂膜附着在第一隔离膜 3上, 由第一隔离膜 3带走, 不会粘附在第一压延辊 1 上。 当纠偏***出现异常吋, 锂膜和第一隔离膜 3的中心部重叠, 锂膜不能完全 被第一隔离膜 3带走, 就会粘附在第一压延辊 1上。 由于锂膜与第一压延辊 1的颜 色不同, 色标传感器 6就会感应到附着在压延辊上的锂膜, 发出报警信号, *** 就会停机。
[0035] 综上所述, 实施本发明的一种压延装置, 具有以下有益效果: 首先, 包覆在两 个压延辊上的隔离膜的离心力的大小不同, 以使压延后的薄膜粘附在离心力大 的隔离膜上并被该隔离膜带走。 其次, 两个压延辊为弧面辊, 使压延出来的薄 膜更均匀, 避免压延出来的薄膜出现中间厚、 两端薄的现象。 第三, 本申请采 用闭环控制施压力的大小, 使施压力在很小的范围内平稳运作。 第四, 两个压 延辊之间设置有微调间隙机构, 以调节两个压延辊之间的工作间隙, 使本申请 的压延装置能压延不同厚度来料。 第五, 锂膜的两侧分别设置有色标传感器, 两个色标传感器位于锂膜幅宽方向的边缘, 以使在纠偏***出现异常吋发出报 警信号, 并使***停机。 最后, 本申请的压延装置通过多次压延可以将厚度为 0. 25mm~0.5mm的锂带压延成厚度为 0.003 mm ~0.005mm的锂膜。
[0036] 虽然本发明是通过具体实施例进行说明的, 本领域技术人员应当明白, 在不脱 离本发明范围的情况下, 还可以对本发明进行各种变换及等同替代。 另外, 针 对特定情形或材料, 可以对本发明做各种修改, 而不脱离本发明的范围。 因此 , 本发明不局限于所公幵的具体实施例, 而应当包括落入本发明权利要求范围 内的全部实施方式。

Claims

权利要求书
[权利要求 1] 一种压延装置, 其特征在于, 包括平行设置的第一压延辊 (1) 和第 二压延辊 (2) , 所述第一压延辊 (1) 上包覆有第一隔离膜 (3) , 所述第二压延辊 (2) 上包覆有第二隔离膜 (4) , 所述第一隔离膜 ( 3) 的离型力大于所述第二隔离膜 (4) 的离型力, 物料 (500) 在所 述第一压延辊 (1) 与所述第二压延辊 (2) 的挤压下附着在所述第一 隔离膜 (3) 上, 所述第一压延辊 (1) 与所述第二压延辊 (2) 的外 表面均为弧面。
[权利要求 2] 根据权利要求 1所述的压延装置, 其特征在于, 所述第一压延辊 (1) 与所述第二压延辊 (2) 之间设置有微调间隙机构 (5) , 所述微调间 隙机构 (5) 包括电机 (51) 、 丝杆 (54) 、 第一斜块 (55) 、 第二 斜块 (56) 、 第三斜块 (57) 及第四斜块 (58) ; 所述电机 (51) 与所述丝杆 (52) 传动连接, 所述丝杆 (52) 通过螺 纹结构带动所述第一斜块 (55) 沿所述丝杆 (52) 的轴线方向移动, 所述第一斜块 (55) 与所述第二斜块 (56) 滑动连接、 并带动所述第 二斜块 (56) 上下移动, 所述第三斜块 (57) 的一端固定在所述第二 斜块 (56) 上, 所述第三斜块 (57) 的另一端延伸至所述第一压延辊 ( 1) 与所述第二压延辊 (2) 之间, 所述第四斜块 (58) 固定在所述 第一压延辊 (1) 或所述第二压延辊 (2) 上, 所述第三斜块 (57) 在 上下移动中使所述第四斜块 (58) 左右移动。
[权利要求 3] 根据权利要求 2所述的压延装置, 其特征在于, 所述第三斜块 (3) 的 两侧分别设置有一排辊子 (59) 。
[权利要求 4] 根据权利要求 1所述的压延装置, 其特征在于, 所述第一压延辊 (1) 的两端设置有第一轴承座 (10) , 所述第二压延辊 (2) 的两端设置 有第二轴承座 (20) , 所述第二轴承座 (20) 上设置有施压机构 (7
[权利要求 5] 根据权利要求 4所述的压延装置, 其特征在于, 所述施压机构 (7) 包 括油缸 (71) 及压力传感器 (72) , 所述油缸 (71) 固定在机架上, 所述压力传感器 (72) 固定在所述第二轴承座 (20) 上、 并位于所述 第二轴承座 (20) 与所述油缸 (71) 之间, 在所述压力传感器 (72) 感应所述油缸 (71) 作用在所述第二轴承座 (20) 上的实际施压力大 于或小于预设值吋, 控制所述油缸 (71) 改变输出压力。
[权利要求 6] 根据权利要求 4所述的压延装置, 其特征在于, 所述第一轴承座 (10
) 固定在机架上, 所述机架上设置有上导向座 (300) 与下导向座 (4 00) , 所述上导向座 (300) 与所述下导向座 (400) 夹紧所述第二轴 承座 (20) 。
[权利要求 7] 根据权利要求 1所述的压延装置, 其特征在于, 所述物料 (500) 被所 述第一压延辊 (1) 与所述第二压延辊 (2) 压延成薄膜, 所述薄膜附 着在所述第一隔离膜 (3) 上, 所述薄膜的两侧分别设置有色标传感 器 (6) , 所述色标传感器 (6) 位于所述薄膜幅宽方向的边缘。
[权利要求 8] 根据权利要求 7所述的压延装置, 其特征在于, 所述薄膜的厚度为 0.0
03 mm ~0.005mm。
[权利要求 9] 根据权利要求 1所述的压延装置, 其特征在于, 所述物料 (500) 为锂 膜。
[权利要求 10] 根据权利要求 1所述的压延装置, 其特征在于, 所述第一压延辊 (1) 两端的直径小于所述第一压延辊 (1) 中部的直径, 所述第二压延辊 (2) 两端的直径小于所述第二压延辊 (2) 中部的直径。
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