WO2018010215A1 - 一种压延覆膜补锂一体机 - Google Patents

一种压延覆膜补锂一体机 Download PDF

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Publication number
WO2018010215A1
WO2018010215A1 PCT/CN2016/091871 CN2016091871W WO2018010215A1 WO 2018010215 A1 WO2018010215 A1 WO 2018010215A1 CN 2016091871 W CN2016091871 W CN 2016091871W WO 2018010215 A1 WO2018010215 A1 WO 2018010215A1
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Prior art keywords
lithium
film
pole piece
strip
separator
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PCT/CN2016/091871
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English (en)
French (fr)
Inventor
张祥领
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广东基泰智能设备有限公司
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Publication of WO2018010215A1 publication Critical patent/WO2018010215A1/zh

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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
    • H01M4/04—Processes of manufacture in general
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • 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
    • 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
    • H01M4/1395—Processes of manufacture of electrodes based on metals, Si or alloys
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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

Definitions

  • the present invention relates to a pole piece lithium-recharging device, and more particularly to a calendering film-filling lithium-integrating machine that combines calendering and lamination, and belongs to the technical field of lithium ion battery production.
  • the lithium-filled process of the pole piece consists of calendering and laminating.
  • Calendering and laminating as an independent mechanism play an irreplaceable role in the lithium-filling process of the pole piece, but in order to form an industrialization, it is necessary to The organic combination combines to form a complete equipment for production.
  • An object of the present invention is to provide a calendering and laminating lithium-integrating machine in which two processes of rolling and laminating are organically integrated in order to solve the above technical problems.
  • a calendering and laminating lithium-integrating machine comprising a first calendering device, a second calendering device, a first lithium strip unwinding device, and a second lithium stripping device Rolling device, film laminating device, first isolating film unwinding device, first isolating film winding device, second isolating film unwinding device, second isolating film winding device, third isolating film unwinding device, third isolation Film winding device, fourth release film unwinding device, fourth insulation film winding device, pole piece unwinding device, pole piece winding device;
  • the first isolation film and the second isolation film are respectively located on one side of the first lithium strip and the first lithium strip enters the first a calendering device and the second separator is peeled off from the first calendering device and is wound up by the second separator winding device, and the first lithium strip is attached to the first separator to form a first lithium-receiving strip;
  • the third isolation film and the fourth isolation film are respectively a side of the second lithium strip and the second lithium strip enter the second calendering device and the third separator is discharged from the second calendering device After peeling off and being wound by a third isolating film winding device, the second lithium tape is attached to the fourth separating film to form a second lithium-receiving tape;
  • the first lithium-retaining tape and the second lithium-receiving tape are respectively located on one side of the pole piece and the pole piece into the film-forming device, and the first lithium strip is located in the first isolation film and the pole piece The second lithium strip is located between the fourth isolation film and the fourth isolation film;
  • the first lithium tape and the second lithium tape are attached to the pole piece to form a lithium-filled pole piece and are received by the pole piece.
  • the winding device winds up; the first separator is wound by the first separator winding device, and the fourth separator is wound by the fourth separator winding device.
  • the first rolling device and the second rolling device are each provided with a calender roll.
  • the release force of the first isolation film is greater than the release force of the second isolation film.
  • the first release film has a release force at least twice that of the second release film.
  • the release force of the third separator is smaller than the release force of the fourth separator.
  • the fourth release film has a release force at least twice that of the third release film.
  • the first lithium-providing tape is provided with a correcting mechanism for causing the lithium-containing film surface of the first lithium-added tape to face the pole piece.
  • the second lithium-filled strip is provided with a correcting mechanism for causing the lithium-containing film surface of the second lithium-filled strip to face the pole piece.
  • the two sides of the pole piece are respectively provided with a coating layer
  • the film coating device is provided with a film stick
  • the first lithium tape and the second lithium tape are respectively pressed by the film stick Into the coating layer on both sides of the pole piece.
  • the calendering film-refilling lithium-integrating device includes a CCD on-line detecting device for detecting a lithium-filling effect of a pole piece, and a sticker for labeling and identifying a waste sub-pole piece that is unsuccessful in replenishing lithium. Standard machine.
  • the present invention combines two processes of calendering and laminating in a pole piece lithium-replenishing process, by using the original
  • the independent calendering mechanism and the laminating mechanism are organically combined to form a complete calendering and laminating lithium-integrating device which integrates calendering and laminating, thereby solving the problem of the double-sided homogenous lithium-clad film of the pole piece, and Compact structure and excellent performance, it can be industrialized.
  • FIG. 1 is a schematic view showing the structure of a rolled laminated lithium-integrating machine according to an embodiment of the present invention.
  • a calendering film lithium-integrating machine includes a first calendering device 41, a second calendering device 42, a first lithium strip unwinding device 31, a second lithium strip unwinding device 32, and a coating film.
  • the device 6 the first isolating film unwinding device 11, the first isolating film winding device 21, the second isolating film unwinding device 12, the second isolating film winding device 22, the third isolating film unwinding device 13, the first a third separator winding device 23, a fourth separator unwinding device 14, a fourth separator winding device 24, a pole piece unwinding device 51, a pole piece winding device 52; a first rolling device 41, a second rolling
  • the device 42 is respectively provided with a calender roll;
  • the first isolation film, the second isolation film, and the first lithium tape are respectively discharged by the first release film unwinding device 11, the second release film unwinding device 12, and the first lithium tape unwinding device 31, the first The separator and the second separator are respectively located on one side of the first lithium strip and the first lithium strip enters the first calendering device 41 and are subjected to calendering by the calender roll, and the second separator is peeled off from the first calendering device 41 and is peeled off.
  • the second isolation film winding device 22 winds up, and the first lithium tape is attached to the first isolation film to form a first lithium-receptive tape; the first isolation film and the second isolation film always protect the first lithium tape during the rolling process The effect of not contacting the calendering roller, wherein the first separator not only protects the first lithium strip from contacting the calendering roller, but also functions as the first lithium strip, and the first lithium strip can also be avoided. a condition of curling or tearing;
  • the third isolation film, the fourth isolation film, and the second lithium tape are respectively released by the third release film unwinding device 13, the fourth release film unwinding device 14, and the second lithium tape unwinding device 32
  • the third The separator and the fourth separator are respectively One side of the second lithium strip and the second lithium strip enter the second calendering device 42 and are subjected to calendering by the calender roll, and the third separator is peeled off from the second calendering device 42 and peeled off and collected by the third separator winding device 23.
  • the second lithium strip is attached to the fourth isolation film to form a second lithium-filled strip;
  • the third and fourth separators serve to protect the second lithium strip from contact with the calender roll during the calendering process, wherein
  • the fourth isolating film not only protects the second lithium strip from contact with the calendering roll, but also functions as a second lithium strip, and the same can prevent the second lithium strip from being curled or torn;
  • the first lithium-retaining tape and the second lithium-filled tape are respectively located on one side of the pole piece and the pole piece into the film-coating device 6, and the first lithium tape is located Between the first isolation film and the pole piece, the second lithium strip is located between the fourth isolation film and the fourth isolation film; the first lithium tape, the second lithium tape and the film are coated by the first isolation film and the fourth isolation film The stick is isolated, avoiding contact between the first lithium strip and the second lithium strip and the coated stick
  • the first lithium-added tape, the second lithium-replenishing tape, and the pole piece are pressed by the coating film stick of the film coating device 6, the first lithium tape and the second lithium tape are attached to the pole piece to form a lithium-filled pole piece and The pole piece winding device 52 winds up; the first separator is wound by the first separator winding device 21, and the fourth separator is wound by the fourth separator winding device 24.
  • the composition of the separator, the lithium strip, and the pole piece can be adjusted for each component.
  • the layout of the components is more compact, and the overall volume of the rolled laminated lithium-lithium integrated machine is reduced as much as possible.
  • the rolled laminated lithium-integrated machine is provided with a plurality of fixed pulleys 10 for adjusting the separation film and the direction of the lithium strip.
  • the first isolation film needs to be adhered to the first lithium tape, and therefore, the release force of the first isolation film is greater than that of the second isolation film.
  • the release force, and the first release film has a release force at least twice that of the second release film, and the first lithium tape can be sufficiently reliably adhered to the first isolation film.
  • the fourth separator needs to be adhered to the second lithium strip, and therefore, the release force of the fourth separator is greater than the release force of the third separator, and The fourth release film has a release force at least twice that of the third isolation film, and ensures that the second lithium tape is sufficiently reliably attached to the fourth On the separator.
  • the first lithium-receiving tape is a strip-shaped film structure
  • the first lithium-added tape is provided with a correction mechanism 7 for making the lithium-containing film surface of the first lithium-added tape face the pole piece, and the first lithium-receiving tape is ensured by the correcting mechanism 7
  • the first lithium strip faces the pole piece and is aligned with the pole piece.
  • the second lithium-receiving tape has a strip-shaped film structure, in the case of being subjected to an external force or due to an installation error of the fixed pulley 10, inevitably, deviation or even curling may occur, and the second lithium-receiving tape must be a pole piece. Alignment is performed for the reference. Therefore, the second lithium-supplement tape is provided with a correction mechanism 7 for making the lithium-containing film surface of the second lithium-filled strip face toward the pole piece, and the second lithium strip on the second lithium-filled strip is ensured by the correcting mechanism 7 For pole pieces, the same line is aligned with the pole piece.
  • a coating layer is respectively disposed on both sides of the pole piece, and the coating device 6 is provided with a laminating stick and a cylinder or a servo motor for applying pressure to the laminating stick, the first lithium strip and the first The pressure applied by the dilithic strip through the film stick is pressed into the coating layers on both sides of the pole piece.
  • the calendering and laminating lithium-integrating machine is a continuous production operation, and the unqualified product cannot be directly removed. Therefore, the calendering and laminating lithium-integrating machine includes a CCD for detecting the lithium-receiving effect of the pole piece.
  • the in-line detecting device 8 and the labeling machine 9 for labeling the waste sub-polar sheets which are not successful in lithium replenishment are labeled.
  • the lithium-filled pole piece is subjected to actual detection by the C CD on-line detecting device 8. If a defective product occurs, the CCD on-line detecting device 8 sends a signal, and the labeling machine 9 attaches a mark to the corresponding unqualified product segment according to the received signal.
  • the label in the subsequent process, cuts out the defective product segment according to the label.
  • the CCD on-line detecting device 8 includes at least two cameras for detecting the two sides of the lithium-filled pole piece.
  • the present invention combines two processes of calendering and laminating in the process of lithium enrichment of a pole piece, and organically combines the original calendering mechanism and the laminating mechanism to form a complete set of calendering and coating.
  • the film-rolling laminated lithium-lithium integrated machine solves the problem of the double-sided double-sided lithium-clad film, and has a compact structure and excellent performance, and can be industrialized.

Abstract

本发明公开了一种压延覆膜补锂一体机，第一锂带附着在第一隔离膜上形成第一补锂带；第二锂带附着在第四隔离膜上形成第二补锂带；所述第一补锂带和第二补锂带分别位于极片的一侧与极片同时进入覆膜装置；第一锂带和第二锂带附着在极片上形成补锂极片并由极片收卷装置收卷；第一隔离膜由第一隔离膜收卷装置收卷，第四隔离膜由第四隔离膜收卷装置收卷；本发明通过将极片补锂工艺中的压延和覆膜两道工序结合在一起，通过将原本独立的压延机构和覆膜机构有机结合在一起，形成一套完成的集压延和覆膜于一身的压延覆膜补锂一体机设备，解决了极片双面同时覆锂膜的问题，并且结构紧凑，性能优良，可以实现产业化应用。

Description

发明名称：一种压延覆膜补锂一体机
技术领域
[0001] 本发明涉及一种极片补锂装置， 具体涉及一种将压延和覆膜结合在一起的压延 覆膜补锂一体机， 属于锂离子电池生产技术领域。
背景技术
[0002] 在电池的首次充电过程中都会由于固体电解质膜 (SEI膜)的形成而消耗部分锂， 由此而造成正极材料锂的损失， 从而降低了电池的容量， 造成首次效率的降低 。 这在以合金材料为活性物质的负极片中表现得尤为明显。 另外， 在锂离子电 池循环过程中 SEI膜消耗及修复， 正负极内部死锂增加使得电池的容量持续下降 ， 导致电池循环寿命降低。 为了减少由于电池在首次充放电及循环过程中过程 中的不可逆容量带来的电池容量的降低， 对锂离子电池负极极片的两面进行补 充部分活性锂膜可以充分改善以上问题。
[0003] 目前极片补锂工艺由压延和覆膜组成， 压延和覆膜作为独立的机构在极片补锂 工艺中起到无可替代的作用， 但要想形成产业化， 就必须把两者有机的结合在 一起， 形成一种完整的设备用于生产中。
技术问题
[0004] 本发明的目的在于针对上述技术问题提出一种将压延和覆膜两道工序有机整合 在一起的压延覆膜补锂一体机。
问题的解决方案
技术解决方案
[0005] 本发明解决上述技术问题所采用的技术方案为： 一种压延覆膜补锂一体机， 包 括第一压延装置、 第二压延装置、 第一锂带放卷装置、 第二锂带放卷装置、 覆 膜装置、 第一隔离膜放卷装置、 第一隔离膜收卷装置、 第二隔离膜放卷装置、 第二隔离膜收卷装置、 第三隔离膜放卷装置、 第三隔离膜收卷装置、 第四隔离 膜放卷装置、 第四隔离膜收卷装置、 极片放卷装置、 极片收卷装置；
[0006] 第一隔离膜和第二隔离膜分别位于第一锂带的一侧与第一锂带同吋进入所述第 一压延装置且第二隔离膜从所述第一压延装置出来后剥离并由所述第二隔离膜 收卷装置收卷， 第一锂带附着在第一隔离膜上形成第一补锂带；
[0007] 所述第三隔离膜和第四隔离膜分别为第二锂带的一侧与第二锂带同吋进入所述 第二压延装置且第三隔离膜从所述第二压延装置出来后剥离并由第三隔离膜收 卷装置收卷， 第二锂带附着在第四隔离膜上形成第二补锂带；
[0008] 所述第一补锂带和第二补锂带分别位于极片的一侧与极片同吋进入覆膜装置， 并且所述第一锂带位于所述第一隔离膜与极片之间， 所述第二锂带位于所述第 四隔离膜与第四隔离膜之间；
[0009] 所述第一补锂带、 第二补锂带以及极片经过所述覆膜装置后， 第一锂带和第二 锂带附着在极片上形成补锂极片并由极片收卷装置收卷； 第一隔离膜由第一隔 离膜收卷装置收卷， 第四隔离膜由第四隔离膜收卷装置收卷。
[0010] 在本发明中， 所述第一压延装置、 第二压延装置分别设有压延辊。
[0011] 在本发明中， 所述第一隔离膜的离型力大于第二隔离膜的离型力。
[0012] 在本发明中， 所述第一隔离膜的离型力至少为所述第二隔离膜的两倍。
[0013] 在本发明中， 所述第三隔离膜的离型力小于第四隔离膜的离型力。
[0014] 在本发明中， 所述第四隔离膜的离型力至少为所述第三隔离膜的两倍。
[0015] 在本发明中， 所述第一补锂带设有用于使得第一补锂带的含锂膜面朝向极片的 纠偏机构。
[0016] 在本发明中， 所述第二补锂带设有用于使得第二补锂带的含锂膜面朝向极片的 纠偏机构。
[0017] 在本发明中， 所述极片的两侧分别设有涂布层， 所述覆膜装置设有覆膜棍， 所 述第一锂带和第二锂带通过覆膜棍分别压入极片两侧的涂布层内。
[0018] 在本发明中， 所述压延覆膜补锂一体机包括用于检测极片补锂效果的 CCD在线 检测装置以及用于对补锂不成功的废次极片进行贴标识别的贴标机。
[0019] 发明的有益交果
有益效果
[0020] 本发明通过将极片补锂工艺中的压延和覆膜两道工序结合在一起， 通过将原本 独立的压延机构和覆膜机构有机结合在一起， 形成一套完成的集压延和覆膜于 一身的压延覆膜补锂一体机设备， 解决了极片双面同吋覆锂膜的问题， 并且结 构紧凑， 性能优良， 可以实现产业化应用。
对附图的简要说明
附图说明
[0021] 图 1为本发明一实施例中的压延覆膜补锂一体机的结构组成示意图。
本发明的实施方式
[0022] 为了更清楚地说明本发明的技术方案， 以下结合附图及实施例， 对本发明的技 术方案进行进一步详细说明， 显而易见地， 下面描述仅仅是本发明的一些实施 例， 对于本领域普通技术人员来讲， 在不付出创造性劳动的前提下， 还可以根 据这些实施例获得其他的实施例。
[0023] 参照图 1， 一种压延覆膜补锂一体机， 包括第一压延装置 41、 第二压延装置 42 、 第一锂带放卷装置 31、 第二锂带放卷装置 32、 覆膜装置 6、 第一隔离膜放卷装 置 11、 第第一隔离膜收卷装置 21、 第二隔离膜放卷装置 12、 第二隔离膜收卷装 置 22、 第三隔离膜放卷装置 13、 第三隔离膜收卷装置 23、 第四隔离膜放卷装置 1 4、 第四隔离膜收卷装置 24、 极片放卷装置 51、 极片收卷装置 52; 第一压延装置 41、 第二压延装置 42分别设有压延辊；
[0024] 第一隔离膜、 第二隔离膜、 第一锂带分别由第一隔离膜放卷装置 11、 第二隔离 膜放卷装置 12、 第一锂带放卷装置 31放出后， 第一隔离膜和第二隔离膜分别位 于第一锂带的一侧与第一锂带同吋进入第一压延装置 41受到压延辊的压延且第 二隔离膜从第一压延装置 41出来后剥离并由第二隔离膜收卷装置 22收卷， 第一 锂带附着在第一隔离膜上形成第一补锂带； 第一隔离膜和第二隔离膜在压延过 程中一直起到保护第一锂带不跟压延辊接触的作用， 其中第一隔离膜除了保护 第一锂带不跟压延辊接触的作用同吋还起到牵弓 I第一锂带的作用， 同吋还可以 避免第一锂带出现卷曲或者撕裂的状况；
[0025] 第三隔离膜、 第四隔离膜、 第二锂带分别由第三隔离膜放卷装置 13、 第四隔离 膜放卷装置 14、 第二锂带放卷装置 32放出后， 第三隔离膜和第四隔离膜分别为 第二锂带的一侧与第二锂带同吋进入第二压延装置 42受到压延辊的压延且第三 隔离膜从第二压延装置 42出来后剥离并由第三隔离膜收卷装置 23收卷， 第二锂 带附着在第四隔离膜上形成第二补锂带； 第三隔离膜和第四隔离膜在压延过程 中一直起到保护第二锂带不跟压延辊接触的作用， 其中第四隔离膜除了保护第 二锂带不跟压延辊接触的作用同吋还起到牵弓 I第二锂带的作用， 同吋还可以避 免第二锂带出现卷曲或者撕裂的状况；
[0026] 极片由极片放卷装置 51放出后， 第一补锂带和第二补锂带分别位于极片的一侧 与极片同吋进入覆膜装置 6， 并且第一锂带位于第一隔离膜与极片之间， 第二锂 带位于第四隔离膜与第四隔离膜之间； 通过第一隔离膜和第四隔离膜将第一锂 带、 第二锂带与覆膜棍隔离幵来， 避免第一锂带、 第二锂带与覆膜棍发生接触
[0027] 第一补锂带、 第二补锂带以及极片经过覆膜装置 6的覆膜棍挤压后， 第一锂带 和第二锂带附着在极片上形成补锂极片并由极片收卷装置 52收卷； 第一隔离膜 由第第一隔离膜收卷装置 21收卷， 第四隔离膜由第四隔离膜收卷装置 24收卷。
[0028] 在一具体实施例中， 由于上述压延覆膜补锂一体机的组成部件较多， 并且交汇 点较多， 为此， 通过调整隔离膜、 锂带以及极片的走向可以使得各个组成部件 的布局更加紧凑， 尽可能地减小压延覆膜补锂一体机的总体体积， 为此， 压延 覆膜补锂一体机设有多个用于调整隔离膜以及锂带走向的定滑轮 10， 通过定滑 轮10调整第一隔离膜、 第二隔离膜、 第三隔离膜、 第四隔离膜、 第一锂带、 第 二锂带、 第一补锂带、 第二补锂带以及极片的走向， 节约设备安装空间， 优化 设备结构。
[0029] 在一具体实施例中， 由于第二隔离膜在经过压延之后需要剥离， 第一隔离膜需 要与第一锂带粘连， 因此， 第一隔离膜的离型力大于第二隔离膜的离型力， 并 且第一隔离膜的离型力至少为第二隔离膜的两倍， 可以保证第一锂带充分可靠 地附着在第一隔离膜上。
[0030] 同样， 由于第三隔离膜在经过压延之后需要剥离， 第四隔离膜需要与第二锂带 粘连， 因此， 第四隔离膜的离型力大于第三隔离膜的离型力， 并且第四隔离膜 的离型力至少为第三隔离膜的两倍， 可以保证第二锂带充分可靠地附着在第四 隔离膜上。
[0031] 在一具体实施例中， 由于第一补锂带为带状薄膜结构， 在受到外力冲击吋或者 由于定滑轮 10安装误差， 不可避免地会出现偏离甚至卷曲现象， 而第一补锂带 必须以极片为基准进行对齐， 因此， 第一补锂带设有用于使得第一补锂带的含 锂膜面朝向极片的纠偏机构 7， 通过纠偏机构 7保证第一补锂带上的第一锂带面 向极片， 同吋与极片对齐。
[0032] 同样， 由于第二补锂带为带状薄膜结构， 在受到外力冲击吋或者由于定滑轮 10 安装误差， 不可避免地会出现偏离甚至卷曲现象， 而第二补锂带必须以极片为 基准进行对齐， 因此， 第二补锂带设有用于使得第二补锂带的含锂膜面朝向极 片的纠偏机构 7， 通过纠偏机构 7保证第二补锂带上的第二锂带面向极片， 同吋 与极片对齐。
[0033] 在一具体实施例中， 极片的两侧分别设有涂布层， 覆膜装置 6设有覆膜棍以及 给覆膜棍施加压力的油缸或者伺服电机， 第一锂带和第二锂带通过覆膜棍施加 的压力分别压入极片两侧的涂布层内。
[0034] 在一具体实施例中， 压延覆膜补锂一体机为连续生产作业， 出现不合格产品无 法直接去除， 因此， 压延覆膜补锂一体机包括用于检测极片补锂效果的 CCD在 线检测装置 8以及用于对补锂不成功的废次极片进行贴标识别的贴标机 9。 通过 C CD在线检测装置 8将补锂极片进行实吋检测， 若出现不合格产品， CCD在线检测 装置 8发出信号， 贴标机 9根据收到的信号对相应的不合格产品段贴上标识标签 ， 在后续工序中根据标签将不合格产品段剪除。 优选的， 为实现对补锂极片的 双面同吋检测， CCD在线检测装置 8包括至少两台摄像头， 分别对补锂极片两面 进行检测。
[0035] 本发明通过将极片补锂工艺中的压延和覆膜两道工序结合在一起， 通过将原本 独立的压延机构和覆膜机构有机结合在一起， 形成一套完成的集压延和覆膜于 一身的压延覆膜补锂一体机设备， 解决了极片双面同吋覆锂膜的问题， 并且结 构紧凑， 性能优良， 可以实现产业化应用。
[0036] 以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的普通技术 人员来说， 在不脱离本发明原理的前提下， 还可以作出若干改进和润饰， 这些 改进和润饰也应视为本发明的保护范围。

Claims

权利要求书
[权利要求 1] 一种压延覆膜补锂一体机， 其特征在于， 包括第一压延装置、 第二压 延装置、 第一锂带放卷装置、 第二锂带放卷装置、 覆膜装置、 第一隔 离膜放卷装置、 第一隔离膜收卷装置、 第二隔离膜放卷装置、 第二隔 离膜收卷装置、 第三隔离膜放卷装置、 第三隔离膜收卷装置、 第四隔 离膜放卷装置、 第四隔离膜收卷装置、 极片放卷装置、 极片收卷装置 第一隔离膜和第二隔离膜分别位于第一锂带的一侧与第一锂带同吋进 入所述第一压延装置且第二隔离膜从所述第一压延装置出来后剥离并 由所述第二隔离膜收卷装置收卷， 第一锂带附着在第一隔离膜上形成 第一补锂带；
所述第三隔离膜和第四隔离膜分别为第二锂带的一侧与第二锂带同吋 进入所述第二压延装置且第三隔离膜从所述第二压延装置出来后剥离 并由第三隔离膜收卷装置收卷， 第二锂带附着在第四隔离膜上形成第 二补锂带；
所述第一补锂带和第二补锂带分别位于极片的一侧与极片同吋进入覆 膜装置， 并且所述第一锂带位于所述第一隔离膜与极片之间， 所述第 二锂带位于所述第四隔离膜与第四隔离膜之间； 所述第一补锂带、 第二补锂带以及极片经过所述覆膜装置后， 第一锂 带和第二锂带附着在极片上形成补锂极片并由极片收卷装置收卷； 第 一隔离膜由第一隔离膜收卷装置收卷， 第四隔离膜由第四隔离膜收卷 装置收卷。
[权利要求 2] 如权利要求 1所述的压延覆膜补锂一体机， 其特征在于， 所述第一压 延装置、 第二压延装置分别设有压延辊。
[权利要求 3] 如权利要求 1所述的压延覆膜补锂一体机， 其特征在于， 所述第一隔 离膜的离型力大于第二隔离膜的离型力。
[权利要求 4] 如权利要求 3所述的压延覆膜补锂一体机， 其特征在于， 所述第一隔 离膜的离型力至少为所述第二隔离膜的两倍。
[权利要求 5] 如权利要求 1所述的压延覆膜补锂一体机， 其特征在于， 所述第三隔 离膜的离型力小于第四隔离膜的离型力。
[权利要求 6] 如权利要求 5所述的压延覆膜补锂一体机， 其特征在于， 所述第四隔 离膜的离型力至少为所述第三隔离膜的两倍。
[权利要求 7] 如权利要求 1所述的压延覆膜补锂一体机， 其特征在于， 所述第一补 锂带设有用于使得第一补锂带的含锂膜面朝向极片的纠偏机构。
[权利要求 8] 如权利要求 1所述的压延覆膜补锂一体机， 其特征在于， 所述第二补 锂带设有用于使得第二补锂带的含锂膜面朝向极片的纠偏机构。
[权利要求 9] 如权利要求 1所述的压延覆膜补锂一体机， 其特征在于， 所述极片的 两侧分别设有涂布层， 所述覆膜装置设有覆膜棍， 所述第一锂带和第 二锂带通过覆膜棍分别压入极片两侧的涂布层内。
[权利要求 10] 如权利要求 1所述的压延覆膜补锂一体机， 其特征在于， 所述压延覆 膜补锂一体机包括用于检测极片补锂效果的 CCD在线检测装置以及用 于对补锂不成功的废次极片进行贴标识别的贴标机。
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