WO2021012934A1 - 用于极片补锂的装置和极片补锂的方法 - Google Patents

用于极片补锂的装置和极片补锂的方法 Download PDF

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Publication number
WO2021012934A1
WO2021012934A1 PCT/CN2020/100292 CN2020100292W WO2021012934A1 WO 2021012934 A1 WO2021012934 A1 WO 2021012934A1 CN 2020100292 W CN2020100292 W CN 2020100292W WO 2021012934 A1 WO2021012934 A1 WO 2021012934A1
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WO
WIPO (PCT)
Prior art keywords
lithium
release agent
roller
transfer film
pole piece
Prior art date
Application number
PCT/CN2020/100292
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English (en)
French (fr)
Inventor
陈仕通
龚志杰
谢斌
马林
Original Assignee
宁德时代新能源科技股份有限公司
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP20843419.1A priority Critical patent/EP3955334A4/en
Publication of WO2021012934A1 publication Critical patent/WO2021012934A1/zh
Priority to US17/575,164 priority patent/US20220140311A1/en

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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
    • 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
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/049—Manufacturing of an active layer by chemical means
    • 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
    • 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
    • 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
    • H01M10/052—Li-accumulators
    • 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

  • This application relates to the field of battery production, and in particular to a lithium replenishing device and a method for replenishing lithium on pole pieces.
  • One of the solutions in the prior art is to apply a release agent on the surface of the lithium belt by a coating roller on-line, so that the thinned lithium belt after rolling adheres to the calender roller, and the pole piece passes through the calender roller directly to the surface of the calender roller.
  • the thinned lithium ribbon is transferred to the surface of the pole piece to compensate for the loss of lithium during the first charge and discharge.
  • the two surfaces of the lithium belt are simultaneously coated with a release agent online, which requires extremely high thickness consistency of the lithium belt.
  • the coating mechanism that provides the lithium belt release agent is coupled with the rolling pressure of the two coating rollers, which makes the equipment integration complicated and the supply of the release agent is inflexible and uncontrollable.
  • the purpose of this application is to provide a device for replenishing lithium on pole pieces and a method for replenishing lithium on pole pieces, which can reduce the requirements for the consistency of the thickness of the lithium belt and provide a release agent More flexible, more controllable and simpler.
  • the device for replenishing lithium on pole pieces includes two first rollers, a second roller, a lithium belt supply mechanism, and a first transfer film.
  • the first transfer film transport mechanism is used to transport the first transfer film carrying the first release agent and transfer the first release agent to lithium On the first surface of the belt;
  • the second transfer film conveying mechanism is located upstream of the second roller and the first roller adjacent to the second roller, and the second transfer film conveying mechanism is used to convey the second release agent
  • the second transfer film and the second release agent are transferred to the second surface of the lithium belt;
  • the pole piece providing mechanism is located upstream of the two first rollers, and the pole piece providing mechanism is used to transfer between the two first rollers
  • a pole piece is provided in between; wherein the second roller and the adjacent first roller are used to roll the lithium strip with the first release agent and the second release agent transferred to the first surface and the second surface, respectively ,
  • the two first rollers are used to counter the entry between the two first rollers
  • the first release agent, the lithium foil and the pole piece are rolled to make
  • the present application also provides a method for replenishing lithium with pole pieces, which includes the following steps: providing pole pieces and a lithium belt; transferring a first release agent to the first surface of the lithium belt; transferring a second release agent to the lithium On the second surface of the belt; roll the lithium belt transferred with the first release agent and the second release agent to form a lithium foil; press the lithium foil on at least one surface of the pole piece to form a lithium supplement pole piece .
  • the beneficial effects of the present application are as follows: the first transfer film bearing the first release agent is used to provide the first release agent to the first surface of the lithium belt, and the second transfer film bearing the second release agent is used to transfer the lithium belt The second surface provides a second release agent.
  • first release agent and the second release agent When the first release agent and the second release agent are provided (no matter it is offline pre-curing setting or online coating), it avoids the provision of lithium tape release in the background art
  • the coupling of the coating mechanism of the agent and the rolling pressure of the two coating rollers results in complicated equipment integration, and reduces the requirements for the consistency of the thickness of the incoming lithium belt, so that the first release agent and the second release agent are provided (Even if the first release agent is provided on the first transfer film and the second release agent is provided on the second transfer film) more flexible, more controllable and simpler.
  • Fig. 1 is a schematic diagram of a first embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • Fig. 2 is a schematic diagram of a second embodiment of a device for replenishing lithium on pole pieces according to the present application
  • FIG. 3 is a schematic diagram of a third embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • FIG. 4 is a schematic diagram of a fourth embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • FIG. 5 is a schematic diagram of a fifth embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • Fig. 6 is a schematic diagram of a sixth embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • Fig. 7 is a schematic diagram of a seventh embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • FIG. 8 is a schematic diagram of an eighth embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • FIG. 9 is a schematic diagram of an embodiment of the coating mechanism of the device for replenishing lithium on pole pieces according to the present application.
  • FIG. 10 is a schematic diagram of another embodiment of the coating mechanism of the device for replenishing lithium on pole pieces according to the present application.
  • FIG. 11 is a schematic diagram of still another embodiment of the coating mechanism of the device for replenishing lithium on pole pieces according to the present application.
  • Fig. 1 is a schematic diagram of a first embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • the device for replenishing lithium for pole pieces includes two first rollers 1, a second roller 2, a lithium belt providing mechanism 3, a first transfer film conveying mechanism 4, and a second transfer film conveying mechanism 5 and pole piece providing mechanism 6.
  • the device for replenishing lithium on pole pieces may further include two first cleaning components 7, and each first cleaning component 7 is used to clean the surface of each first roller 1.
  • the device for replenishing lithium on pole pieces may further include a second cleaning assembly 8 for cleaning the surface of the second roller 2.
  • the device for replenishing lithium on the pole piece may further include a charging mechanism 10 for replenishing lithium on the pole piece.
  • the two first rollers 1 are opposed to each other.
  • the second roller 2 is adjacent to the first roller 1.
  • the lithium belt supply mechanism 3 is located upstream of the second roller 2 and the first roller 1 adjacent to the second roller 2.
  • the lithium belt supply mechanism 3 is used to feed the lithium belt L0 between the second roller 2 and the first roller 1 adjacent to the second roller 2.
  • the lithium belt supply mechanism 3 is a roller.
  • the first transfer film conveying mechanism 4 is located upstream of the second roller 2 and the first roller 1 adjacent to the second roller 2.
  • the first transfer film transport mechanism 4 is used to transport the first transfer film T1 carrying the first release agent G1 and transfer the first release agent G1 to the first surface S1 of the lithium belt L0.
  • the second transfer film conveying mechanism 5 is located upstream of the second roller 2 and the first roller 1 adjacent to the second roller 2.
  • the second transfer film transport mechanism 5 is used to transport the second transfer film T2 carrying the second release agent G2 and transfer the second release agent G2 to the second surface S2 of the lithium belt L0.
  • the surface roughness of the first release agent G1 is greater than the surface roughness of the second release agent G2.
  • the first release agent G1 is continuously distributed on the first transfer film T1 carrying the first release agent G1.
  • the first release agent G1 is not transferred to the first surface of the lithium belt L0
  • the first release agent G1 is continuously distributed on the first transfer film T1 along the longitudinal direction of the first transfer film T1
  • the second release agent is continuously distributed on the second transfer film T2 carrying the second release agent G2 G2
  • the second release agent G2 is continuously distributed on the first surface S2 along the longitudinal direction of the second transfer film T2.
  • the first release agent G1 is cured on the first transfer film T1 in advance; the second release agent G2 is cured on the second transfer film T2 in advance, thereby enabling the first
  • the provision of the release agent G1 and the second release agent G2 is simpler than the on-line coating of the release agent of the background technology.
  • the component integration difficulty and compatibility of the device used for pole piece lithium supplementation are reduced, the number of components is reduced, and the operation is simplified .
  • the first transfer film conveying mechanism 4 includes a first roller 41.
  • the first transfer film conveying mechanism 4 may further include a first transfer film unwinding mechanism 42 and a first transfer film winding mechanism 43.
  • the first transfer film unwinding mechanism 42 is used for unwinding the first transfer film T1; the first transfer film winding mechanism 43 is used for winding the first transfer film T1.
  • the first transfer film unwinding mechanism 42 and the first transfer film winding mechanism 43 are both rollers.
  • the second transfer film conveying mechanism 5 includes a second roller 51.
  • the second transfer film conveying mechanism 5 further includes a second transfer film unwinding mechanism 52 and a second transfer film winding mechanism 53.
  • the second transfer film unwinding mechanism 52 is used for unwinding the second transfer film T2
  • the second transfer film winding mechanism 53 is used for winding the second transfer film T2.
  • the second transfer film unwinding mechanism 52 and the second transfer film winding mechanism 53 are both rollers.
  • the second roller 51 of the second transfer film conveying mechanism 5 and the first roller 41 of the first transfer film conveying mechanism 4 are opposed to each other.
  • the first roller 41 and the second roller 51 are used to transfer the first transfer film T1 bearing the first release agent G1, the lithium belt L0 provided by the lithium belt supply mechanism 3, and the lithium belt L0 bearing the second release agent G2.
  • the second transfer film T2 is rolled to transfer the first release agent G1 and the second release agent G2 to the first surface S1 and the second surface S2 of the lithium belt L0, respectively.
  • the uniformity of the first release agent G1 and the second release agent G2 transferred to the first surface S1 and the second surface S2 of the lithium belt L0 is obtained improve.
  • the first roller 41 and the second roller 51 are used to continuously adhere the first release agent G1 and the second release agent G2 on the first surface S1 and the second surface S2 of the lithium belt L0, respectively. .
  • the first roller 41 is a heat roller.
  • the second roller 51 may also be a heat roller.
  • the first roller 41 and/or the second roller 51 are heated rollers, which will reduce the roller pressure between the first roller 41 and the second roller 51, which can make the first release agent G1 on the first transfer film T1 easier Ground transfer to the first surface S1 of the lithium belt L0 and/or enables the second release agent G2 on the second transfer film T2 to be more easily transferred to the second surface S2 of the lithium belt L0, that is, the release agent transfers In the process, the efficiency is improved, and the damage to the first transfer film T1 and the second transfer film T2 is reduced, thereby realizing the repetition of the first transfer film T1 and the second transfer film T2.
  • the pole piece providing mechanism 6 is located upstream of the two first rollers 1.
  • the pole piece providing mechanism 6 is used to provide pole pieces P0 between the two first rollers 1.
  • the pole piece P0 includes a current collector P01 and an active material layer P02 provided on the surface of the current collector P01.
  • the distribution of the first release agent G1 corresponds to the distribution of the active material layer P02, and the active material layer P02 of the pole piece P0 is continuously distributed on the current collector P01. In other words, the first release agent G1 is also continuously distributed.
  • the second roller 2 and the adjacent first roller 1 are used to perform the lithium belt L0 on the first surface S1 and the second surface S2 transferred with the first release agent G1 and the second release agent G2, respectively. It is rolled to roll the lithium ribbon L0 into a lithium foil L1 and make the lithium foil L1 adhere to the first roller 1 adjacent to the second roller 2 via the first release agent G1. Specifically, the second roller 2 and the adjacent first roller 1 are used to transfer the lithium belt with the first release agent G1 and the second release agent G2 to the first surface S1 and the second surface S2, respectively. When L0 is rolled, since the surface roughness of the first release agent G1 is greater than that of the second release agent G2, the rolled lithium foil L1 adheres to the second release agent G1 through the first release agent G1. The roller 2 is adjacent to the first roller 1.
  • the two first rollers 1 are used to roll the first release agent G1, the lithium foil L1 and the pole piece P0 entering between the two first rollers 1, so that the lithium foil L1 adheres to the pole piece.
  • a lithium supplement pole piece P1 is formed on the sheet P0 (specifically, the active material layer P02).
  • the surface roughness of the active material layer P02 of the pole piece P0 is greater than the surface roughness of the first release agent G1, so the adhesion force between the lithium foil L1 and the active material layer P02 is greater than that between the lithium foil L1 and the first release agent G1.
  • Each first cleaning assembly 7 includes a first scraper 71. According to actual conditions, each first cleaning assembly 7 further includes a first cleaning device 72.
  • the blade of the first scraper 71 is attached to the surface of the corresponding first roller 1.
  • the cutting edge of the first scraper 71 is an obtuse angle with the tangent line corresponding to the first roller 1 along the rotation direction of the corresponding first roller 1.
  • the first scraper 71 is used to scrape off the first release agent G1 and lithium dust L2 on the surface of the corresponding first roller 1, and the first cleaning device 72 is located behind the first scraper 71 in the rotation direction of the corresponding first roller 1 , Used to clean the surface after being scraped by the first scraper 71 corresponding to the first roller 1.
  • the first cleaning device 72 can, for example, use negative pressure to absorb the debris (first release agent G1 and lithium debris L2) scraped by the first scraper 71, and can also be used to inject high-temperature gas onto the surface of the corresponding first roller 1. , The high-temperature gas quickly volatilizes the remaining first release agent G1, which further ensures the cleaning of the corresponding first roller 1.
  • the second cleaning assembly 8 includes a second scraper 81. According to actual conditions, the second cleaning assembly 8 may further include a second cleaning device 82.
  • the blade of the second scraper 81 is in contact with the surface of the second roller 2. Preferably, the blade of the second scraper 81 is at an obtuse angle with the tangent of the second roller 2 along the rotation direction of the second roller 2.
  • the second scraper 81 is used to scrape off the second release agent G2 on the surface of the corresponding second roller 2.
  • the second cleaning device 82 is located behind the second scraper 81 along the rotation direction of the second roller 2 and is used for cleaning the surface scraped by the second scraper 81 of the second roller 2.
  • the second cleaning device 82 can, for example, use negative pressure to absorb the second release agent G2 scraped off by the second scraper 81, and can also be used to spray high-temperature gas onto the surface of the second roller 2 so that the high-temperature gas remains in The second release agent G2 on the second roller 2 evaporates quickly, which further ensures the cleanliness of the second roller 2.
  • the lithium supplement pole piece collection mechanism 10 is located downstream of the two first rollers 1.
  • the lithium pole piece collecting mechanism 10 is used to collect the lithium supplementary pole piece P1.
  • the lithium supplement pole piece collecting mechanism 10 is a roller.
  • the second roller 2, the lithium belt supply mechanism 3, the first transfer film conveying mechanism 4, and the second transfer film conveying mechanism 5 are correspondingly arranged as one according to the active material layer P02 being arranged on one or both surfaces of the current collector P01 Group or two groups.
  • the second roller 2, the lithium belt supply mechanism 3, the first transfer film conveying mechanism 4, and the second transfer film conveying mechanism 5 are arranged as one Group, that is, the left part of the two first rollers 1 or the right part of the two first rollers 1, so as to realize the single-sided lithium replenishment of the pole piece P0; when the active material layer P02 is set on the current collector P01
  • the second roller 2, the lithium belt providing mechanism 3, the first transfer film conveying mechanism 4, and the second transfer film conveying mechanism 5 are arranged in two groups as shown in Fig. 1, so as to realize the pole piece P0 Lithium on both surfaces.
  • two first rollers 1 constitute a first roller pair
  • the second roller 2 and an adjacent first roller constitute a second roller pair.
  • the second roller pair and the first roller pair share a corresponding first roller.
  • the second roller 2 is located on the side of the line formed by the roller inlet and the roller outlet of the first roller pair. In other words, the second roller 2 is located on the line formed by the pole piece P0 and the lithium supplement pole piece P1 (Ie the side of the rolling process line).
  • the center of the second roller 2 and the two first rollers 1 are on the same line, but it is not limited to this, as long as it can meet the requirements of the aforementioned second roller pair for rolling and lithium foil L1 adhesion
  • the calendering of the corresponding first roller 1 and the first roller pair and the lithium foil L1 adhere to the active material layer P02 of the pole piece P0.
  • the first embodiment of the device for replenishing lithium on the pole piece shown in FIG. 1 realizes the continuous replenishment of lithium on the pole piece P0.
  • Fig. 2 is a schematic diagram of a second embodiment of a device for replenishing lithium on pole pieces according to the present application. Note that the components having the same structure as the components of the first embodiment are denoted by the same reference numerals and their description is omitted. In addition, the description of the same actions and effects as the first embodiment will be omitted.
  • the gap between the first roller 41 and the second roller 51 is adjustable to enable the first release agent G1 and the second release agent G2 are intermittently adhered to the first surface S1 and the second surface S2 of the lithium belt L0, respectively.
  • each first cleaning assembly 7 also includes a first auxiliary knife 73, the first auxiliary knife 73 is arranged in front of the entrance formed by the two first rollers 1, and used to intermittently adhere to the first roller
  • the lithium scraps L2 formed by the lithium foil L1 between the lithium foils L1 on the surface of 1 and located in front of the rolling entrance are removed to prevent the lithium scraps L2 from adhering to the pole piece P0, thereby improving the accuracy of lithium supplementation
  • the device for replenishing lithium also includes a collecting trough 9, which is located under the second roller 2 and the corresponding first roller 1, and is used to collect the lithium debris L2 removed by the first auxiliary knife 73 and from the second roller 2 and the lithium scraps L2 formed by the lithium foil L1
  • the second embodiment of the device for replenishing lithium on the pole piece shown in FIG. 2 realizes the intermittent replenishment of lithium on the pole piece P0. Note that the part of the current collector P01 where the active material layer P02 is not provided is a blank current collector Area.
  • Fig. 3 is a schematic diagram of a third embodiment of a device for replenishing lithium on pole pieces according to the present application. Note that the components having the same structure as the components of the second embodiment are denoted by the same reference numerals and their description is omitted. In addition, the description of the same actions and effects as the second embodiment will be omitted.
  • the first transfer film T1 carrying the first release agent G1 also carries the first lubricant R1, and the first lubricant R1 and the first release agent G1 are alternately arranged;
  • the second transfer film T2 carrying the second release agent G2 also carries the second lubricant R2, and the second lubricant R2 and the first
  • the two release agents G2 are arranged alternately;
  • the first lubricant R1 is preset on the first transfer film T1;
  • the second lubricant R2 is preset on the second transfer film T2;
  • the first release agent G1 and the first lubricant alternate with each other Lubricant R1 adheres to the first surface S1 of the lithium belt L0;
  • the alternate second release agent G2 and second lubricant R2 adhere to the second surface S2 of the lithium belt L0;
  • the active material layer P02 of the pole piece P0 Intermittently distributed on the current collector P01, the first release agent G
  • the third embodiment of the device for replenishing lithium on the pole piece shown in FIG. 3 realizes the intermittent replenishment of lithium on the pole piece P0.
  • Fig. 4 is a schematic diagram of a fourth embodiment of a device for replenishing lithium on pole pieces according to the present application. Note that the components having the same structure as the components of the second embodiment are denoted by the same reference numerals and their description is omitted. In addition, the description of the same actions and effects as the second embodiment will be omitted.
  • the first transfer film T1 carrying the first release agent G1 also carries the first lubricant.
  • R1, and the first lubricant R1 and the first release agent G1 are arranged alternately; the second release agent G2 on the second transfer film T2 carrying the second release agent G2 is continuously distributed on the second transfer film T2;
  • the alternate first release agent G1 and the first lubricant R1 adhere to the first surface S1 of the lithium belt L0;
  • the second release agent G2 continuously adheres to the second surface S2 of the lithium belt L0; pole piece P0
  • the active material layer P02 is intermittently distributed on the current collector P01, and the first release agent G1 corresponds to the active material layer P02 one to one.
  • the fourth embodiment of the device for replenishing lithium on the pole piece shown in Fig. 4 realizes the intermittent replenishment of lithium on the pole piece P0.
  • the first release agent G1 is cured in advance on the first transfer film T1 and the second release agent G2 It is pre-cured on the second transfer film T2; in the third embodiment of the device for replenishing lithium on pole pieces shown in FIG. 3, the first lubricant R1 is pre-installed on the first transfer film T1 and the second lubricant R2 is pre-installed on the second transfer film T2; in the fourth embodiment of the device for replenishing lithium on pole pieces shown in FIG. 4, the first lubricant R1 is pre-installed on the first transfer film T1.
  • Fig. 5 is a schematic diagram of a fifth embodiment of a device for replenishing lithium on pole pieces according to the present application. Like the first embodiment of the device for replenishing lithium on a pole piece shown in FIG. 1, the fifth embodiment of the device for replenishing lithium on a pole piece shown in FIG. 5 realizes the continuous replenishment of lithium on the pole piece P0. Note that the components having the same structure as the components of the first embodiment are denoted by the same reference numerals and their description is omitted. In addition, the description of the same actions and effects as the first embodiment will be omitted.
  • the first transfer film conveying mechanism 4 further includes a first release agent coating mechanism 44.
  • the film agent coating mechanism 44 is used to coat the first release agent G1 on the first transfer film T1;
  • the second transfer film conveying mechanism 5 also includes a second release agent coating mechanism 54 which is The cloth mechanism 54 is used to coat the second release agent G2 on the second transfer film T2.
  • Fig. 6 is a schematic diagram of a sixth embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • the sixth embodiment of the device for replenishing lithium on a pole piece shown in FIG. 6 realizes the intermittent lithium replenishment of the pole piece P0.
  • the components having the same structure as the components of the second embodiment shown in FIG. 2 are denoted by the same reference numerals and their description is omitted.
  • the description of the same actions and effects as the second embodiment will be omitted.
  • the first transfer film conveying mechanism 4 further includes a first release agent coating mechanism 44, The film agent coating mechanism 44 is used to coat the first release agent G1 on the first transfer film T1;
  • the second transfer film conveying mechanism 5 also includes a second release agent coating mechanism 54 which is The cloth mechanism 54 is used to coat the second release agent G2 on the second transfer film T2.
  • Fig. 7 is a schematic diagram of a seventh embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • the seventh embodiment of the device for replenishing lithium on pole pieces shown in FIG. 7 realizes intermittent lithium replenishment of the pole pieces P0.
  • the components having the same structure as the components of the third embodiment shown in FIG. 3 are denoted by the same reference numerals and their description is omitted.
  • the description of the same actions and effects as the third embodiment will be omitted.
  • the first transfer film conveying mechanism 4 further includes a first release agent coating mechanism 44, The film agent coating mechanism 44 is used to coat the first release agent G1 on the first transfer film T1; the second transfer film conveying mechanism 5 also includes a second release agent coating mechanism 54 which is The cloth mechanism 54 is used for coating the second release agent G2 on the second transfer film T2; the first transfer film conveying mechanism 4 also includes a first lubricant coating mechanism 45, and the first lubricant coating mechanism 45 is used for The first lubricant R1 is coated on the first transfer film T1; the second transfer film conveying mechanism 5 also includes a second lubricant coating mechanism 55, and the second lubricant coating mechanism 55 is used to apply the second lubricant R2 Coated on the second transfer film T2.
  • Fig. 8 is a schematic diagram of an eighth embodiment of a device for replenishing lithium on pole pieces according to the present application.
  • the eighth embodiment of the device for replenishing lithium on a pole piece shown in FIG. 8 realizes the intermittent lithium replenishment of the pole piece P0.
  • the components having the same structure as the components of the fourth embodiment shown in FIG. 4 are denoted by the same reference numerals and their description is omitted.
  • the description of the same actions and effects as the fourth embodiment will be omitted.
  • the first transfer film conveying mechanism 4 further includes a first release agent coating mechanism 44, The film agent coating mechanism 44 is used to coat the first release agent G1 on the first transfer film T1; the first transfer film conveying mechanism 4 further includes a first lubricant coating mechanism 45, a first lubricant coating mechanism 45 is used to coat the first lubricant R1 on the first transfer film T1; the second transfer film conveying mechanism 5 also includes a second release agent coating mechanism 54 which is used to apply The second release agent G2 is coated on the second transfer film T2.
  • the first release agent G1 is applied on-line on the first transfer film T1 and the second release agent G2 is applied on-line on the second transfer film T2;
  • the first lubricant R1 is applied on-line on the first transfer film T1 and The second lubricant R2 is applied online on the second transfer film T2;
  • the first lubricant R1 is applied online on the first transfer film T1 on.
  • the coating mechanism used for coating can be a gravure coating mechanism M1, a transfer coating mechanism M2 or an extrusion coating mechanism.
  • FIG. 9 is a schematic diagram of an embodiment of the coating mechanism of the device for replenishing lithium on pole pieces according to the present application.
  • the gravure coating mechanism M1 includes a storage groove M11 and a gravure roller M12.
  • the storage groove M11 is used to accommodate the corresponding lubricant or release agent.
  • the gravure roller M12 and the corresponding transfer film (the first transfer film T1 or The second transfer film T2) is adjacent; the gravure roller M12 has recesses M121 arranged at intervals in the circumferential direction and extending in the circumferential direction.
  • the gravure roller M12 is used to transfer the corresponding lubricant from the receiving groove M11 through the recesses M121 during rotation (
  • the first lubricant R1 or the second lubricant R2) or the release agent (the first release agent G1 or the second release agent G2) is drawn and coated on the corresponding surface of the corresponding transfer film.
  • FIG. 10 is a schematic diagram of another embodiment of the coating mechanism of the device for replenishing lithium on pole pieces according to the present application.
  • the transfer coating mechanism M2 includes a doctor blade M21 and a transfer roller M22.
  • the doctor blade M21 is used to contain the corresponding lubricant or release agent and is adjacent to the transfer roller M22.
  • the transfer roller M22 and the corresponding transfer film (section One transfer film T1 or second transfer film T2) is adjacent; scraper M21 is used to apply the corresponding lubricant (first lubricant R1 or second lubricant R2) or release agent (first release agent G1 or second The release agent G2) is transferred on the surface of the transfer roller M22, which is used to make the corresponding lubricant or release agent transferred on the surface of the transfer roller M22 contact and apply to the corresponding surface of the corresponding transfer film on.
  • FIG. 11 is a schematic diagram of still another embodiment of the coating mechanism of the device for replenishing lithium on pole pieces according to the present application.
  • the extrusion coating mechanism M3 includes a storage tank M31, a screw pump M32, and a coating head M33.
  • the storage tank M31 is used to contain the corresponding lubricant (first lubricant R1 or second lubricant R2) or
  • the mold agent first mold release agent G1 or second mold release agent G2
  • the corresponding lubricant or mold release agent is delivered to the coating head M33 through the screw pump M32
  • the coating head M33 is used to transfer the corresponding lubricant or release agent
  • the mold agent is coated on the corresponding transfer film (the first transfer film T1 or the second transfer film T2).
  • the first transfer film T1 carrying the first release agent G1 is used to provide the first release agent G1 to the first surface S1 of the lithium belt L0
  • the The second transfer film T2 of the second release agent G2 is used to provide the second release agent G2 to the second surface S2 of the lithium belt L0
  • the first release agent G1 and the second release agent G2 are provided (whether offline in advance The curing setting or online coating) is separated from the roll pressure of the first roller 41 and the second roller 51 (that is, the first release agent G1 and the coating mechanism that avoids the provision of lithium strip release agent in the background art and two
  • the coupling of the rolling pressure of the coating roller and the influence of the rolling force of the two coating rollers coated with the release agent on the supply of the first release agent G1 and the second release agent G2 cause the complexity of equipment integration and reduce The requirements for the consistency of the thickness of the incoming lithium belt, so that the first release agent G1 and the second release agent G2 are provided (even if the first release
  • first transfer film T1 carrying the first release agent G1 provides the first surface S1 of the lithium ribbon L0 with a first release
  • the film agent G1 provides the second film release agent G2 to the second surface S2 of the lithium belt L0 through the second transfer film T2 carrying the second film release agent G2, which can press the first roller 41 and the second roller that apply rolling 51 is spaced apart from the lithium belt L0.
  • the first transfer film T1 and the second transfer film T2 play the role of transferring and buffering the roller pressure. This transfer requires the first roller 41 and the second roller 51 to directly release the first roller.
  • the transfer of the film agent G1 and the second release agent G2 to the lithium belt L0 becomes softer, so that the first release agent G1 and the second release agent G2 transferred to the lithium belt L0 will be more uniform.
  • the first transfer film T1 of the first release agent G1 provides the first surface S1 of the lithium belt L0 with the first release agent G1, and the second transfer film T2 carrying the second release agent G2 is used to transfer the lithium belt L0
  • the second surface S2 provides the second release agent G2, and the rotation direction of the first roller 41 and the second roller 51 will be the same as the traveling direction of the lithium belt L0 provided by the lithium belt providing mechanism 3 (ie forward direction), while in the background art
  • the rotation direction of the first roller 41 and the second roller 51 is opposite to the traveling direction of the lithium belt L0 provided by the lithium belt supply mechanism 3 (ie, the reverse direction), thereby improving the first release agent G1 and the second Transfer efficiency of release agent G2.
  • the following embodiment introduces a method for replenishing lithium on pole pieces provided in this application.
  • the parts that are not described in detail please refer to the aforementioned device for replenishing lithium on pole pieces.
  • the present application provides a method for replenishing lithium on a pole piece, which includes the following steps: providing a pole piece P0 and a lithium belt L0; transferring a first release agent G1 to the first surface S1 of the lithium belt L0; The second release agent G2 is transferred to the second surface S2 of the lithium belt L0; the lithium belt L0 transferred with the first release agent G1 and the second release agent G2 is rolled to form a lithium foil L1; The lithium foil L1 is pressed on at least one surface of the pole piece P0 to form the lithium supplement pole piece P1. At least one surface of the pole piece P0 refers to one surface of the pole piece P0 or two surfaces of the pole piece P0. By pressing the lithium foil L1 on at least one surface of the pole piece P0, the lithium supplement pole piece P1 can be formed.
  • transferring the first release agent G1 to the first surface S1 of the lithium belt L0 specifically includes: providing a first transfer film T1 carrying the first release agent G1; The transfer film T1 and the lithium belt L0 are rolled to transfer the first release agent G1 to the first surface S1 of the lithium belt L0.
  • the rolling of the first transfer film T1 and the lithium belt L0 specifically includes: periodically adjusting the gap between the first roller 41 and the second roller 51 for rolling the first transfer film T1 and the lithium belt L0 , So as to intermittently adhere the first release agent G1 on the first surface S1 of the lithium belt L0.
  • Providing the first transfer film T1 carrying the first release agent G1 specifically includes: coating the first release agent G1 on the first transfer film T1.
  • Providing the first transfer film T1 carrying the first release agent G1 specifically includes: coating the first lubricant R1 on the first transfer film T1, and making the first lubricant R1 and the first release agent G1 Interval coating provides the first transfer film T1 carrying the first release agent G1 and the first lubricant R1 at intervals.
  • transferring the second release agent G2 to the second surface S2 of the lithium belt L0 specifically includes: providing a second transfer film T2 carrying the second release agent G2; The transfer film T2 and the lithium belt L0 are rolled to transfer the second release agent G2 to the second surface S2 of the lithium belt L0.
  • the rolling of the second transfer film T2 and the lithium belt L0 specifically includes: periodically adjusting the gap between the first roller 41 and the second roller 51 for rolling the second transfer film T2 and the lithium belt L0 , To intermittently adhere the second release agent G2 on the second surface S2 of the lithium belt L0.
  • Providing the second transfer film T2 carrying the second release agent G2 specifically includes: coating the second release agent G2 on the second transfer film T2.
  • Providing the second transfer film T2 carrying the second release agent G2 specifically includes: coating the second lubricant R2 on the second transfer film T2, and the second lubricant R2 and the second release agent G2 are separated Coating; Provide a second transfer film T2 carrying a second lubricant R2 and a second release agent G2 at intervals.
  • the method for replenishing lithium on pole pieces of the present application further includes the following steps: transfer the lithium belt L0 with the first release agent G1 and the second release agent G2 to the first roller 1
  • the film agent G1 is cleaned;
  • the second release agent G2 on the second roller 2 of the lithium belt L0 to which the first release agent G1 and the second release agent G2 are rolled is cleaned.
  • the method for replenishing lithium on pole pieces of the present application further includes the following steps: collecting the cleaned first release agent G1 and second release agent G2.

Abstract

一种用于极片补锂的装置和极片补锂的方法。所述用于极片补锂的装置，包括：两个第一辊轮（1）、第二辊轮（2）、锂带提供机构（3）、第一转移膜输送机构（4）、第二转移膜输送机构（5）及极片提供机构（6）；两个第一辊轮（1）彼此相对，第二辊轮（2）与第一辊轮（1）相邻；锂带提供机构（3）用于将锂带（L0）送入第二辊轮（2）和第一辊轮（1）之间；第一转移膜输送机构（4）用于输送承载第一脱膜剂（G1）的第一转移膜（T1）并将第一脱膜剂（T1）转移到锂带（L0）上；第二转移膜输送机构（5）用于输送承载第二脱膜剂（G2）的第二转移膜（T2）并将第二脱膜剂（G2）转移到锂带（L0）上；极片提供机构（6）用于提供极片（P0），第二辊轮（2）和第一辊轮（1）用于将锂带（L0）轧制成锂箔（L1）并使锂箔（L1）粘附在第一辊轮（1）上；两个第一辊轮（1）用于使锂箔（L1）粘附在极片（P0）上。由此降低对锂带（L0）厚度一致性要求，使脱膜剂的提供更灵活、更可控、更简单。

Description

用于极片补锂的装置和极片补锂的方法
本申请要求于2019年07月22日提交中国专利局、申请号为201921156786.0、申请名称为“用于极片补锂的装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池生产领域，尤其涉及一种用于补锂装置和极片补锂的方法。
背景技术
近年来随着电动汽车的蓬勃发展，对动力电池的能量密度的要求越来越严格，对于负极片来说，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，从而造成正极材料锂的损失，继而降低电池的容量，造成首次效率的降低。这在以合金材料(如硅合金和锡合金等)为活性物质的负极片中表现得尤为明显。为了减少由于电池在首次充放电过程中的不可逆容量带来的电池容量的降低，已采用了一些解决方法。
现有技术中的一个解决方法是通过涂覆辊在线在锂带表面涂布脱模剂，使轧制后压薄的锂带黏附在压延辊上，极片经过压延辊，直接将压延辊表面的压薄锂带转移至极片表面以补偿首次充放电中锂的损失。在该方法中，在线对锂带的两个表面同时涂覆脱模剂，这对锂带厚度一致性要求极高。另外，提供锂带脱膜剂的涂布机构与两个涂覆辊的辊压是耦合的，从而使得设备集成复杂且脱膜剂的提供不灵活、不可控。
发明内容
鉴于背景技术中存在的问题，本申请的目的在于提供一种用于极片补锂的装置和极片补锂的方法，其能使得对锂带厚度一致性要求降低，使得脱膜剂的提供更灵活、更可控、更简单。
为了实现上述目的，本申请提供了一种用于极片补锂的装置，用于极片补锂的装置包括两个第一辊轮、第二辊轮、锂带提供机构、第一转移膜输送机构、第二转移膜输送机构以及极片提供机构；两个第一辊轮彼此相对，第二辊轮与第一辊轮相邻；锂带提供机构位于第二辊轮和与第二辊轮相邻的第一辊轮的上游，锂带提供机构用于将锂带送入第二辊轮和与第二辊轮相邻的第一辊轮之间；第一转移膜输送机构位于第二辊轮和与第二辊轮相邻的第一辊轮的上游，第一转移膜输送机构用于输送承载有第一脱膜剂的第一转移膜并将第一脱膜剂转移到锂带的第一表面上；第二转移膜输送机构位于第二辊轮和与第二辊轮相邻的第一辊轮的上游，第二转移膜输送机构用于输送承载有第二脱膜剂的第二转移膜并将第二脱膜剂转移到锂带的第二表面上；极片提供机构位于两个第一辊轮的上游，极片提供机构用于向两个第一辊轮之间提供极片；其中，第二辊轮和与其相邻的第一辊轮用于对第一表面和第二表面分别转移有第一脱膜剂和第二脱膜剂的锂带进行轧制，以将锂带轧制成锂箔并且使锂箔粘附在与第二辊轮相邻的第一辊轮上；两个第一辊轮用于对进入两个第一辊轮之间的第一脱膜剂、锂箔和极片进行辊压，以使锂箔粘附在极片上而形成补锂极片。
本申请还提供一种极片补锂的方法，其包括如下步骤：提供极片和锂带；将第一脱模剂转移到锂带的第一表面上；将第二脱模剂转移到锂带的第二表面上；将转移有第一脱膜剂和第二脱膜剂的锂带进行辊压，以形成锂箔；将锂箔压制在极片的至少一个表面以形成补锂极片。
本申请的有益效果如下：通过承载第一脱膜剂的第一转移膜来向锂带的第一表面提供第一脱膜剂、通过承载第二脱膜剂的第二转移膜来向锂带的第二表面提供第二脱膜剂，在提供第一脱膜剂和第二脱膜剂时(无论是离线预先固化设置还是在线涂布)，避免了背景技术中的因提供锂带脱膜剂的涂布机构与两个涂覆辊的辊压的耦合造成的设备集成复杂，且降低了对来料锂带厚度一致性的要求从而使得第一脱膜剂和第二脱膜剂的提供(即使第一脱膜剂设置在第一转移膜以及第二脱膜剂设置在第二转移膜上)更灵活、更可控、更简单。
附图说明
图1是根据本申请的用于极片补锂的装置的第一实施例的示意图。
图2是根据本申请的用于极片补锂的装置的第二实施例的示意图；
图3是根据本申请的用于极片补锂的装置的第三实施例的示意图；
图4是根据本申请的用于极片补锂的装置的第四实施例的示意图；
图5是根据本申请的用于极片补锂的装置的第五实施例的示意图；
图6是根据本申请的用于极片补锂的装置的第六实施例的示意图；
图7是根据本申请的用于极片补锂的装置的第七实施例的示意图；
图8是根据本申请的用于极片补锂的装置的第八实施例的示意图；
图9是根据本申请的用于极片补锂的装置的涂布机构的一实施例的示意图；
图10是根据本申请的用于极片补锂的装置的涂布机构的另一实施例的示意图；
图11是根据本申请的用于极片补锂的装置的涂布机构的再一实施例的示意图。
具体实施方式
附图示出本文的实施例，且将理解的是，所公开的实施例仅仅是本文的示例，本文可以以各种形式实施，因此，本文公开的具体细节不应被解释为限制，而是仅作为权利要求的基础且作为表示性的基础用于教导本领域普通技术人员以各种方式实施本文。
此外，诸如上、下、左、右、前和后等用于说明实施例中的各构件的操作和构造的指示方向的表述不是绝对的而是相对的，且尽管各构件处于图中所示的位置时这些指示是恰当的，但是当这些位置改变时，这些方向应有不同的解释，以对应所述改变。
图1是根据本申请的用于极片补锂的装置的第一实施例的示意图。
在第一实施例中，用于极片补锂的装置包括两个第一辊轮1、第二辊轮2、锂带提供机构3、第一转移膜输送机构4、第二转移膜输送机构5以及极片提供机构6。依据实际情况，用于极片补锂的装置还可包括两个第一清理组件7，各第一清理组件7用于对各第一辊轮1的表面进行清洁。依据实际情况，用于极片补锂的装置还可包括第二清理组件8，第二清理组件8用于对第二辊轮2的表面进行清洁。依据实际情况，用于极片补锂 的装置还可包括补锂极片收取机构10。
两个第一辊轮1彼此相对。第二辊轮2与第一辊轮1相邻。
锂带提供机构3位于第二辊轮2和与第二辊轮2相邻的第一辊轮1的上游。锂带提供机构3用于将锂带L0送入第二辊轮2和与第二辊轮2相邻的第一辊轮1之间。在图1中，锂带提供机构3为辊子。
第一转移膜输送机构4位于第二辊轮2和与第二辊轮2相邻的第一辊轮1的上游。第一转移膜输送机构4用于输送承载有第一脱膜剂G1的第一转移膜T1并将第一脱膜剂G1转移到锂带L0的第一表面S1上。第二转移膜输送机构5位于第二辊轮2和与第二辊轮2相邻的第一辊轮1的上游。第二转移膜输送机构5用于输送承载有第二脱膜剂G2的第二转移膜T2并将第二脱膜剂G2转移到锂带L0的第二表面S2上。第一脱膜剂G1的表面粗糙度大于第二脱膜剂G2的表面粗糙度。承载有第一脱膜剂G1的第一转移膜T1上连续分布第一脱膜剂G1，换句话说，在图1中，在第一脱膜剂G1未转移到锂带L0的第一表面S1上之前，第一脱膜剂G1沿第一转移膜T1的纵向连续分布在第一转移膜T1上；承载有第二脱膜剂G2的第二转移膜T2上连续分布第二脱膜剂G2，换句话说，在图1中，在第二脱膜剂G2未转移到锂带L0的第二表面S2上之前，第二脱膜剂G2沿第二转移膜T2的纵向连续分布在第二转移膜T2上。在图1所示的第一实施例中，第一脱膜剂G1预先固化在第一转移膜T1上；第二脱膜剂G2预先固化在第二转移膜T2上，由此能够使得第一脱膜剂G1和第二脱膜剂G2的提供相对背景技术的脱模剂在线涂布变得简单，用于极片补锂的装置的构件集成难度及兼容性降低、构件数量降低、操作简化。
第一转移膜输送机构4包括第一辊子41。第一转移膜输送机构4还可包括第一转移膜放卷机构42以及第一转移膜收卷机构43。第一转移膜放卷机构42用于放卷第一转移膜T1；第一转移膜收卷机构43用于收卷第一转移膜T1。在图1中，第一转移膜放卷机构42以及第一转移膜收卷机构43均为辊子。
第二转移膜输送机构5包括第二辊子51。第二转移膜输送机构5还包括第二转移膜放卷机构52以及第二转移膜收卷机构53。第二转移膜放卷机构52用于放卷第二转移膜T2，第二转移膜收卷机构53用于收卷第二转移膜T2。在图1中，第二转移膜放卷机构52以及第二转移膜收卷机构53 均为辊子。
第二转移膜输送机构5的第二辊子51和第一转移膜输送机构4的第一辊子41彼此相对。由此，第一辊子41和第二辊子51用于将承载有第一脱膜剂G1的第一转移膜T1、锂带提供机构3提供的锂带L0、承载有第二脱膜剂G2的第二转移膜T2辊压以使第一脱膜剂G1和第二脱膜剂G2分别转移到锂带L0的第一表面S1和第二表面S2上。通过第一辊子41和第二辊子51的辊压作用，分别转移到锂带L0的第一表面S1和第二表面S2上的第一脱膜剂G1和第二脱膜剂G2的均匀性得到提高。在图1中，第一辊子41和第二辊子51用于使第一脱膜剂G1和第二脱膜剂G2分别连续地粘附在锂带L0的第一表面S1和第二表面S2上。
在一实施方式中，第一辊子41为热辊。同样地，第二辊子51也可为热辊。第一辊子41和/或第二辊子51为热辊，均会降低第一辊子41和第二辊子51之间的辊压力，能够使得第一转移膜T1上的第一脱模剂G1更容易地转移到锂带L0的第一表面S1上和/或能够使得第二转移膜T2上的第二脱模剂G2更容易地转移到锂带L0的第二表面S2上，即脱模剂转移过程中效率得到提高，且对第一转移膜T1和第二转移膜T2的损伤降低，进而实现第一转移膜T1和第二转移膜T2的重复。
极片提供机构6位于两个第一辊轮1的上游。极片提供机构6用于向两个第一辊轮1之间提供极片P0。极片P0包括集流体P01以及设置在集流体P01的表面上的活性物质层P02。第一脱膜剂G1的分布与活性物质层P02的分布对应，极片P0的活性物质层P02连续地分布在集流体P01上。换句话说，即第一脱膜剂G1也连续分布。
其中，第二辊轮2和与其相邻的第一辊轮1用于对第一表面S1和第二表面S2分别转移有第一脱膜剂G1和第二脱膜剂G2的锂带L0进行轧制，以将锂带L0轧制成锂箔L1并且使锂箔L1经由第一脱模剂G1粘附在与第二辊轮2相邻的第一辊轮1上。具体地，在第二辊轮2和与其相邻的第一辊轮1用于对第一表面S1和第二表面S2分别转移有第一脱膜剂G1和第二脱膜剂G2的锂带L0进行轧制时，由于第一脱膜剂G1的表面粗糙度大于第二脱膜剂G2的表面粗糙度，所以轧制成的锂箔L1经由第一脱模剂G1粘附在与第二辊轮2相邻的第一辊轮1上。
其中，两个第一辊轮1用于对进入两个第一辊轮1之间的第一脱膜剂 G1、锂箔L1和极片P0进行辊压，以使锂箔L1粘附在极片P0(具体为活性物质层P02)上而形成补锂极片P1。具体地，极片P0的活性物质层P02的表面粗糙度大于第一脱膜剂G1的表面粗糙度，由此锂箔L1与活性物质层P02之间的粘附力大于锂箔L1与第一脱膜剂G1的粘附力，所以当极片P0穿过两个第一辊轮1之间时，锂箔L1会在极片P0的牵引下从对应的第一辊轮1上剥离，从而锂箔L1粘附在极片P0的活性物质层P02上而形成补锂极片P1。
各第一清理组件7包括第一刮刀71。依据实际情况，各第一清理组件7还包括第一清洁装置72。第一刮刀71的刀刃与对应第一辊轮1的表面相贴合。优选地，第一刮刀71的刀刃沿对应第一辊轮1的转动方向与对应第一辊轮1的切线呈钝角。第一刮刀71用于刮除对应第一辊轮1的表面上的第一脱膜剂G1和锂屑L2，第一清洁装置72沿对应第一辊轮1转动方向位于第一刮刀71的后方，用于清洁对应第一辊轮1的第一刮刀71刮擦后的表面。第一清洁装置72例如可以采用负压吸附第一刮刀71刮下的碎屑(第一脱膜剂G1和锂屑L2)，此外还可以用于向对应第一辊轮1的表面喷射高温气体，高温气体使残留的第一脱膜剂G1快速挥发，进一步确保对应第一辊轮1的清洁。
第二清理组件8包括第二刮刀81。依据实际情况，第二清理组件8还可包括第二清洁装置82。第二刮刀81的刀刃与第二辊轮2的表面相贴合。优选地，第二刮刀81的刀刃沿第二辊轮2的转动方向与第二辊轮2的切线呈钝角。第二刮刀81用于刮除对应第二辊轮2的表面上的第二脱膜剂G2。第二清洁装置82沿第二辊轮2的转动方向位于第二刮刀81的后方，用于清洁第二辊轮2的第二刮刀81刮擦后的表面。类似地，第二清洁装置82例如可以采用负压吸附第二刮刀81刮下的第二脱膜剂G2，此外还可以用于向第二辊轮2的表面喷射高温气体，高温气体使残留在第二辊轮2上的第二脱膜剂G2快速挥发，进一步确保第二辊轮2的清洁。
补锂极片收取机构10位于两个第一辊轮1的下游。锂极片收取机构10用于将补锂极片P1收取。在图1中，补锂极片收取机构10为辊子。
第二辊轮2、锂带提供机构3、第一转移膜输送机构4、第二转移膜输送机构5依据活性物质层P02设置在集流体P01的一个或两个表面上而对应地设置为一组或两组。换句话说，当活性物质层P02设置在集流体P01 的一个表面上时，第二辊轮2、锂带提供机构3、第一转移膜输送机构4、第二转移膜输送机构5设置为一组，即两个第一辊轮1的左侧的部分或两个第一辊轮1的右侧的部分，从而实现极片P0的单面补锂；当活性物质层P02设置在集流体P01的两个表面上时，第二辊轮2、锂带提供机构3、第一转移膜输送机构4、第二转移膜输送机构5设置为如图1所示的两组，从而实现极片P0的两表面补锂。
注意的是，在图1所示的第一实施例中，两个第一辊轮1构成第一辊轮对，第二辊轮2与相邻的第一辊轮构成第二辊轮对。第二辊轮对与第一辊轮对共用一个对应的第一辊轮。第二辊轮2位于第一辊轮对的辊压入口和辊压出口形成的连线的侧方，换句话说，第二辊轮2位于极片P0和补锂极片P1形成的连线(即轧制工艺线)的侧方。在图1中，第二辊轮2与两个第一辊轮1的中心在同一直线上，但是不限于此，只要能满足前述的第二辊轮对的轧制作用以及锂箔L1粘附在对应的第一辊轮1和第一辊轮对的压延和锂箔L1粘附在极片P0的活性物质层P02上即可。
图1所示的用于极片补锂的装置的第一实施例实现极片P0的连续性地补锂。
图2是根据本申请的用于极片补锂的装置的第二实施例的示意图。注意的是，具有与第一实施例的部件相同的结构的部件通过由相同的附图标记表示而省略其说明。此外，与第一实施例相同的动作和作用的说明将省略。
与图1的用于极片补锂的装置的第一实施例不同的是：在第二实施例中，第一辊子41和第二辊子51的间隙可调，以能够使第一脱膜剂G1和第二脱膜剂G2分别间断地粘附在锂带L0的第一表面S1和第二表面S2上。极片P0的活性物质层P02间断性分布在集流体P01上(即集流体P01表面的未设置活性物质层P02的部分为空白集流体区)，第一脱膜剂G1与活性物质层P02一一对应；各第一清理组件7还包括第一辅助刀73，第一辅助刀73设置在两个第一辊轮1形成的入口的前方，并用于对间断地粘附到的第一辊轮1的表面上的锂箔L1之间的位于轧制入口前方的由锂箔L1形成的锂屑L2清除，以避免锂屑L2粘附到极片P0，从而提高补锂的精度；用于极片补锂的装置还包括收集槽9，收集槽9位于第二辊轮2和对应第一辊轮1的下方，用于收集第一辅助刀73清除下的锂屑L2以及从 第二辊轮2和对应第一辊轮1之间掉落的由锂箔L1形成的锂屑L2。
图2所示的用于极片补锂的装置的第二实施例实现极片P0的间歇性地补锂，注意的是，集流体P01表面的未设置活性物质层P02的部分为空白集流体区。
图3是根据本申请的用于极片补锂的装置的第三实施例的示意图。注意的是，具有与第二实施例的部件相同的结构的部件通过由相同的附图标记表示而省略其说明。此外，与第二实施例相同的动作和作用的说明将省略。
与图2的用于极片补锂的装置的第二实施例不同的是：在第三实施例中，承载有第一脱膜剂G1的第一转移膜T1上还承载有第一润滑剂R1，且第一润滑剂R1与第一脱膜剂G1交替布置；承载有第二脱膜剂G2的第二转移膜T2上还承载有第二润滑剂R2，且第二润滑剂R2与第二脱膜剂G2交替布置；第一润滑剂R1预先设置在第一转移膜T1上；第二润滑剂R2预先设置在第二转移膜T2上；彼此交替的第一脱膜剂G1和第一润滑剂R1粘附在锂带L0的第一表面S1；彼此交替的第二脱膜剂G2和第二润滑剂R2粘附在锂带L0的第二表面S2；极片P0的活性物质层P02间断性分布在集流体P01上，第一脱膜剂G1与活性物质层P02一一对应。
图3所示的用于极片补锂的装置的第三实施例实现极片P0的间歇性地补锂。
图4是根据本申请的用于极片补锂的装置的第四实施例的示意图。注意的是，具有与第二实施例的部件相同的结构的部件通过由相同的附图标记表示而省略其说明。此外，与第二实施例相同的动作和作用的说明将省略。
与图3的用于极片补锂的装置的第二实施例不同的是：在第四实施例中，承载有第一脱膜剂G1的第一转移膜T1上还承载有第一润滑剂R1，且第一润滑剂R1与第一脱膜剂G1交替布置；承载有第二脱膜剂G2的第二转移膜T2上第二脱膜剂G2连续地分布在第二转移膜T2上；彼此交替的第一脱膜剂G1和第一润滑剂R1粘附在锂带L0的第一表面S1；第二脱膜剂G2连续地粘附在锂带L0的第二表面S2；极片P0的活性物质层P02间断性分布在集流体P01上，第一脱膜剂G1与活性物质层P02一一对应。
图4所示的用于极片补锂的装置的第四实施例实现极片P0的间歇性 地补锂。
注意的是，在图1至图4所示的用于极片补锂的装置的四个实施例中，第一脱膜剂G1预先固化在第一转移膜T1上且第二脱膜剂G2预先固化在第二转移膜T2上；在图3所示的用于极片补锂的装置的第三实施例中，第一润滑剂R1预先设置在第一转移膜T1上且第二润滑剂R2预先设置在第二转移膜T2上；在图4所示的用于极片补锂的装置的第四实施例中，第一润滑剂R1预先设置在第一转移膜T1上。无论是第一脱膜剂G1、第二脱膜剂G2、还是第一润滑剂R1、第二润滑剂R2，采用预先的方式相对在线设置变得简单，用于极片补锂的装置的构件集成难度及兼容性降低、构件数量降低、操作简化。图5是根据本申请的用于极片补锂的装置的第五实施例的示意图。与图1所示的用于极片补锂的装置的第一实施例一样，图5所示的用于极片补锂的装置的第五实施例实现极片P0的连续性地补锂。注意的是，具有与第一实施例的部件相同的结构的部件通过由相同的附图标记表示而省略其说明。此外，与第一实施例相同的动作和作用的说明将省略。
与图1的用于极片补锂的装置的第一实施例不同的是：在第五实施例中，第一转移膜输送机构4还包括第一脱膜剂涂布机构44，第一脱膜剂涂布机构44用于将第一脱膜剂G1涂布在第一转移膜T1上；第二转移膜输送机构5还包括第二脱膜剂涂布机构54，第二脱膜剂涂布机构54用于将第二脱膜剂G2涂布在第二转移膜T2上。
图6是根据本申请的用于极片补锂的装置的第六实施例的示意图。与图2所示的用于极片补锂的装置的第二实施例一样，图6所示的用于极片补锂的装置的第六实施例实现极片P0的间断性地补锂。注意的是，具有与图2所示的第二实施例的部件相同的结构的部件通过由相同的附图标记表示而省略其说明。此外，与第二实施例相同的动作和作用的说明将省略。
与图2的用于极片补锂的装置的第二实施例不同的是：在第六实施例中，第一转移膜输送机构4还包括第一脱膜剂涂布机构44，第一脱膜剂涂布机构44用于将第一脱膜剂G1涂布在第一转移膜T1上；第二转移膜输送机构5还包括第二脱膜剂涂布机构54，第二脱膜剂涂布机构54用于将第二脱膜剂G2涂布在第二转移膜T2上。
图7是根据本申请的用于极片补锂的装置的第七实施例的示意图。与 图3所示的用于极片补锂的装置的第三实施例一样，图7所示的用于极片补锂的装置的第七实施例实现极片P0的间断性地补锂。注意的是，具有与图3所示的第三实施例的部件相同的结构的部件通过由相同的附图标记表示而省略其说明。此外，与第三实施例相同的动作和作用的说明将省略。
与图3的用于极片补锂的装置的第三实施例不同的是：在第七实施例中，第一转移膜输送机构4还包括第一脱膜剂涂布机构44，第一脱膜剂涂布机构44用于将第一脱膜剂G1涂布在第一转移膜T1上；第二转移膜输送机构5还包括第二脱膜剂涂布机构54，第二脱膜剂涂布机构54用于将第二脱膜剂G2涂布在第二转移膜T2上；第一转移膜输送机构4还包括第一润滑剂涂布机构45，第一润滑剂涂布机构45用于将第一润滑剂R1涂布在第一转移膜T1上；第二转移膜输送机构5还包括第二润滑剂涂布机构55，第二润滑剂涂布机构55用于将第二润滑剂R2涂布在第二转移膜T2上。
图8是根据本申请的用于极片补锂的装置的第八实施例的示意图。与图4所示的用于极片补锂的装置的第四实施例一样，图8所示的用于极片补锂的装置的第八实施例实现极片P0的间断性地补锂。注意的是，具有与图4所示的第四实施例的部件相同的结构的部件通过由相同的附图标记表示而省略其说明。此外，与第四实施例相同的动作和作用的说明将省略。
与图4的用于极片补锂的装置的第四实施例不同的是：在第八实施例中，第一转移膜输送机构4还包括第一脱膜剂涂布机构44，第一脱膜剂涂布机构44用于将第一脱膜剂G1涂布在第一转移膜T1上；第一转移膜输送机构4还包括第一润滑剂涂布机构45，第一润滑剂涂布机构45用于将第一润滑剂R1涂布在第一转移膜T1上；第二转移膜输送机构5还包括第二脱膜剂涂布机构54，第二脱膜剂涂布机构54用于将第二脱膜剂G2涂布在第二转移膜T2上。
注意的是，在图5至图8所示的用于极片补锂的装置的四个实施例中，第一脱膜剂G1在线涂布在第一转移膜T1上且第二脱膜剂G2在线涂布在第二转移膜T2上；在图7所示的用于极片补锂的装置的第七实施例中，第一润滑剂R1在线涂布在第一转移膜T1上且第二润滑剂R2在线涂布在第二转移膜T2上；在图8所示的用于极片补锂的装置的第八实施例中，第一润滑剂R1在线涂布在第一转移膜T1上。
注意的是，在图5至图8所示的用于极片补锂的装置的四个实施例中，涂布采用的涂布机构可为凹版涂布机构M1、转移涂布机构M2或挤压涂布机构M3。
图9是根据本申请的用于极片补锂的装置的涂布机构的一实施例的示意图。
如图9所示，凹版涂布机构M1包括收容槽M11以及凹版辊M12，收容槽M11用于收容对应的润滑剂或脱模剂，凹版辊M12与对应的转移膜(第一转移膜T1或第二转移膜T2)相邻；凹版辊M12具有沿周向间隔设置且沿周向延伸的凹部M121，凹版辊M12用于在旋转时通过凹部M121从将收容槽M11中将对应的润滑剂(第一润滑剂R1或第二润滑剂R2)或脱膜剂(第一脱模剂G1或第二脱模剂G2)汲取并涂布在对应的转移膜的对应的表面上。
图10是根据本申请的用于极片补锂的装置的涂布机构的另一实施例的示意图。
如图10所示，转移涂布机构M2包括刮刀M21以及转移辊M22，刮刀M21用于收容对应的润滑剂或脱模剂并与转移辊M22相邻，转移辊M22与对应的转移膜(第一转移膜T1或第二转移膜T2)相邻；刮刀M21用于将对应的润滑剂(第一润滑剂R1或第二润滑剂R2)或脱膜剂(第一脱模剂G1或第二脱模剂G2)转移在转移辊M22的表面上，转移辊M22用于使转移在转移辊M22的表面上的对应的润滑剂或脱膜剂接触并涂覆到对应的转移膜的对应的表面上。
图11是根据本申请的用于极片补锂的装置的涂布机构的再一实施例的示意图。
如图11所示，挤压涂布机构M3包括收容罐M31、螺杆泵M32以及涂布头M33，收容罐M31用于收容对应的润滑剂第一润滑剂R1或第二润滑剂R2)或脱模剂(第一脱模剂G1或第二脱模剂G2)，对应的润滑剂或脱模剂通过螺杆泵M32输送至涂布头M33，涂布头M33用于将对应的润滑剂或脱模剂涂覆到对应的转移膜(第一转移膜T1或第二转移膜T2)上。
在图1至图8所示的八个实施例中，通过承载第一脱膜剂G1的第一转移膜T1来向锂带L0的第一表面S1提供第一脱膜剂G1、通过承载第二 脱膜剂G2的第二转移膜T2来向锂带L0的第二表面S2提供第二脱膜剂G2，将第一脱膜剂G1和第二脱膜剂G2的提供(无论是离线预先固化设置还是在线涂布)与第一辊子41和第二辊子51的辊压分离(即将第一脱膜剂G1和避免了背景技术中的因提供锂带脱膜剂的涂布机构与两个涂覆辊的辊压的耦合，涂覆脱膜剂的两个涂覆辊的辊压的力对第一脱膜剂G1和第二脱膜剂G2的提供的影响造成的设备集成复杂，降低了对来料锂带厚度一致性的要求，从而使得第一脱膜剂G1和第二脱膜剂G2的提供(即使第一脱膜剂G1设置在第一转移膜T1以及第二脱膜剂G1设置在第二转移膜T2上)更灵活、更可控、更简单。此外，通过承载第一脱膜剂G1的第一转移膜T1来向锂带L0的第一表面S1提供第一脱膜剂G1、通过承载第二脱膜剂G2的第二转移膜T2来向锂带L0的第二表面S2提供第二脱膜剂G2，能够将施加辊压的第一辊子41和第二辊子51与锂带L0间隔开，第一转移膜T1和第二转移膜T2起到将辊压力进行传递和缓冲的作用，这种传递要第一辊子41和第二辊子51分别直接将第一脱膜剂G1和第二脱膜剂G2转移到锂带L0上变得柔和一些，从而转移到锂带L0上的第一脱膜剂G1和第二脱膜剂G2会更均匀。此外，通过承载第一脱膜剂G1的第一转移膜T1来向锂带L0的第一表面S1提供第一脱膜剂G1、通过承载第二脱膜剂G2的第二转移膜T2来向锂带L0的第二表面S2提供第二脱膜剂G2，第一辊子41和第二辊子51的旋转方向会与锂带提供机构3提供的锂带L0的行进方向一致(即顺向)，而背景技术中会使第一辊子41和第二辊子51的旋转方向与锂带提供机构3提供的锂带L0的行进方向相反(即逆向)，从而相比背景技术提高了第一脱膜剂G1和第二脱膜剂G2的转移效率。
下面实施例介绍本申请提供的一种极片补锂的方法，其中，未详细描述的部分，请详见前述用于极片补锂的装置。
本申请提供的一种极片补锂的方法，其包括如下步骤：提供极片P0和锂带L0；将第一脱膜剂G1转移到所述锂带L0的第一表面S1上；将第二脱膜剂G2转移到所述锂带L0的第二表面S2上；将转移有第一脱膜剂G1和第二脱膜剂G2的锂带L0进行辊压，以形成锂箔L1；将锂箔L1压制在极片P0的至少一个表面，以形成补锂极片P1。极片P0的至少一个表面指极片P0的其中一个表面，或者极片P0的两个表面。通过在极片P0 的至少一个表面上压制锂箔L1，能够形成补锂极片P1。
在可能的实施方式中，将第一脱膜剂G1转移到所述锂带L0的第一表面S1上，具体包括：提供承载有第一脱膜剂G1的第一转移膜T1；对第一转移膜T1和锂带L0进行辊压，以将第一脱膜剂G1转移到锂带L0的第一表面S1上。
其中，对第一转移膜T1和锂带L0进行辊压，具体包括：周期性的调整用于辊压第一转移膜T1和锂带L0的第一辊子41和第二辊子51之间的间隙，以在锂带L0的第一表面S1上间断地粘附第一脱膜剂G1。提供承载有第一脱膜剂G1的第一转移膜T1，具体包括：在第一转移膜T1上涂布第一脱膜剂G1。提供承载有第一脱膜剂G1的第一转移膜T1，具体还包括：将第一润滑剂R1涂布在第一转移膜T1上，且使第一润滑剂R1和第一脱膜剂G1间隔涂布，提供间隔承载有第一脱膜剂G1和第一润滑剂R1的第一转移膜T1。
在可能的实施方式中，将第二脱膜剂G2转移到所述锂带L0的第二表面S2上，具体包括：提供承载有第二脱膜剂G2的第二转移膜T2；对第二转移膜T2和锂带L0进行辊压，以将第二脱膜剂G2转移到锂带L0的第二表面S2上。
其中，对第二转移膜T2和锂带L0进行辊压，具体包括：周期性的调整用于辊压第二转移膜T2和锂带L0的第一辊子41和第二辊子51之间的间隙，以在锂带L0的第二表面S2上间断地粘附第二脱膜剂G2。提供承载有第二脱膜剂G2的第二转移膜T2，具体包括：在第二转移膜T2上涂布第二脱膜剂G2。提供承载有第二脱膜剂G2的第二转移膜T2，具体还包括：将第二润滑剂R2涂布在第二转移膜T2上，且第二润滑剂R2和第二脱膜剂G2间隔涂布；提供间隔承载有第二润滑剂R2和第二脱膜剂G2的第二转移膜T2。
本申请的极片补锂的方法，还包括如下步骤：对用于辊压转移有第一脱膜剂G1和第二脱膜剂G2的锂带L0的第一辊轮1上的第一脱膜剂G1进行清洁；对用于辊压转移有第一脱膜剂G1和第二脱膜剂G2的锂带L0的第二辊轮2上的第二脱膜剂G2进行清洁。
本申请的极片补锂的方法，还包括如下步骤：对被清洁下来的第一脱膜剂G1和第二脱膜剂G2进行收集。
上面详细的说明描述多个示范性实施例，但本文不意欲限制到明确公开的组合。因此，除非另有说明，本文所公开的各种特征可以组合在一起而形成出于简明目的而未示出的多个另外组合。

Claims (17)

  1. 一种用于极片补锂的装置，其特征在于，
    用于极片补锂的装置包括第二辊轮(2)、锂带提供机构(3)、第一转移膜输送机构(4)、第二转移膜输送机构(5)、极片提供机构(6)以及两个第一辊轮(1)；
    两个第一辊轮(1)彼此相对，第二辊轮(2)与第一辊轮(1)相邻；
    锂带提供机构(3)位于第二辊轮(2)和与第二辊轮(2)相邻的第一辊轮(1)的上游，锂带提供机构(3)用于将锂带(L0)送入第二辊轮(2)和与第二辊轮(2)相邻的第一辊轮(1)之间；
    第一转移膜输送机构(4)位于第二辊轮(2)和与第二辊轮(2)相邻的第一辊轮(1)的上游，第一转移膜输送机构(4)用于输送承载有第一脱膜剂(G1)的第一转移膜(T1)并将第一脱膜剂(G1)转移到锂带(L0)的第一表面(S1)上；
    第二转移膜输送机构(5)位于第二辊轮(2)和与第二辊轮(2)相邻的第一辊轮(1)的上游，第二转移膜输送机构(5)用于输送承载有第二脱膜剂(G2)的第二转移膜(T2)并将第二脱膜剂(G2)转移到锂带(L0)的第二表面(S2)上；
    极片提供机构(6)位于两个第一辊轮(1)的上游，极片提供机构(6)用于向两个第一辊轮(1)之间提供极片(P0)，
    其中，第二辊轮(2)和与其相邻的第一辊轮(1)用于对第一表面(S1)和第二表面(S2)分别转移有第一脱膜剂(G1)和第二脱膜剂(G2)的锂带(L0)进行轧制，以将锂带(L0)轧制成锂箔(L1)并且使锂箔(L1)粘附在与第二辊轮(2)相邻的第一辊轮(1)上；
    两个第一辊轮(1)用于对进入两个第一辊轮(1)之间的第一脱膜剂(G1)、锂箔(L1)和极片(P0)进行辊压，以使锂箔(L1)粘附在极片(P0)上而形成补锂极片(P1)。
  2. 根据权利要求1所述的用于极片补锂的装置，其特征在于，
    第一转移膜输送机构(4)包括第一辊子(41)，第二转移膜输送机构(5)包括第二辊子(51)，第一辊子(41)和第二辊子(51)彼此相对；
    第一辊子(41)和第二辊子(51)用于将承载有第一脱膜剂(G1)的 第一转移膜(T1)、锂带提供机构(3)提供的锂带(L0)、承载有第二脱膜剂(G2)的第二转移膜(T2)辊压以使第一脱膜剂(G1)和第二脱膜剂(G2)分别转移到锂带(L0)的第一表面(S1)和第二表面(S2)上。
  3. 根据权利要求2所述的用于极片补锂的装置，其特征在于，第一辊子(41)为热辊，第二辊子(51)为热辊。
  4. 根据权利要求2或3所述的用于极片补锂的装置，其特征在于，
    第一辊子(41)和第二辊子(51)的间隙可调，以能够使第一脱膜剂(G1)和第二脱膜剂(G2)分别间断地粘附在锂带(L0)的第一表面(S1)和第二表面(S2)上。
  5. 根据权利要求1-4任一项所述的用于极片补锂的装置，其特征在于，
    第一转移膜输送机构(4)还包括第一脱膜剂涂布机构(44)，第一脱膜剂涂布机构(44)用于将第一脱膜剂(G1)涂布在第一转移膜(T1)上；
    第二转移膜输送机构(5)还包括第二脱膜剂涂布机构(54)，第二脱膜剂涂布机构(54)用于将第二脱膜剂(G2)涂布在第二转移膜(T2)上。
  6. 根据权利要求1-5任一项所述的用于极片补锂的装置，其特征在于，
    第一转移膜输送机构(4)还包括第一润滑剂涂布机构(45)，第一润滑剂涂布机构(45)用于将第一润滑剂(R1)涂布在第一转移膜(T1)上；
    第二转移膜输送机构(5)还包括第二润滑剂涂布机构(55)，第二润滑剂涂布机构(55)用于将第二润滑剂(R2)涂布在第二转移膜(T2)上。
  7. 根据权利要求1-6任一项所述的极片补锂装置，其特征在于，
    用于极片补锂的装置还包括补锂极片收取机构(10)；
    补锂极片收取机构(10)位于两个第一辊轮(1)的下游，补锂极片收取机构(10)用于将补锂极片(P1)收取。
  8. 根据权利要求1-8任一项所述的用于极片补锂的装置，其特征在于，
    第二辊轮(2)、锂带提供机构(3)、第一转移膜输送机构(4)、第二转移膜输送机构(5)为两组，以用于向极片(P0)的两表面提供锂箔(L1)。
  9. 根据权利要求1-8任一项所述的用于极片补锂的装置，其特征在于，
    用于极片补锂的装置还包括第一清理组件(7)和第二清理组件(8)，第一清理组件(7)用于清洁第一辊轮(1)，第二清理组件(8)用于清洁第二辊轮(2)。
  10. 根据权利要求1-9任一项所述的用于极片补锂的装置，其特征在于，
    用于极片补锂的装置还包括收集槽(9)，收集槽(9)位于第二辊轮(2)和对应第一辊轮(1)的下方。
  11. 一种极片补锂的方法，其特征在于，包括如下步骤：
    提供极片(P0)和锂带(L0)；
    将第一脱膜剂(G1)转移到所述锂带(L0)的第一表面(S1)上；
    将第二脱膜剂(G2)转移到所述锂带(L0)的第二表面(S2)上；
    将转移有所述第一脱膜剂(G1)和第二脱膜剂(G2)的锂带(L0)进行辊压，以形成锂箔(L1)；
    将所述锂箔(L1)压制在极片(P0)的至少一个表面，以形成补锂极片(P1)。
  12. 根据权利要求11所述的极片补锂的方法，其特征在于，所述将第一脱膜剂(G1)转移到所述锂带(L0)的第一表面(S1)上，具体包括：
    提供承载有所述第一脱膜剂(G1)的第一转移膜(T1)；
    对所述第一转移膜(T1)和锂带(L0)进行辊压，以将所述第一脱膜剂(G1)转移到锂带(L0)的第一表面(S1)上。
  13. 根据权利要求12所述的极片补锂的方法，其特征在于，所述对所述第一转移膜(T1)和锂带(L0)进行辊压，具体包括：
    周期性的调整用于辊压所述第一转移膜(T1)和锂带(L0)的第一辊子(41)和第二辊子(51)之间的间隙，以在所述锂带(L0)的第一表面(S1)上间断地粘附第一脱膜剂(G1)。
  14. 根据权利要求12或13所述的极片补锂的方法，其特征在于，所述提供承载有所述第一脱膜剂(G1)的第一转移膜(T1)，具体包括：
    将第一润滑剂(R1)涂布在第一转移膜(T1)上，且使所述第一润滑剂(R1)和第一脱膜剂(G1)间隔涂布；
    提供间隔承载有所述第一脱膜剂(G1)和第一润滑剂(R1)的第一转移膜(T1)。
  15. 根据权利要求11-14任一项所述的极片补锂的方法，其特征在于，所述将第二脱膜剂(G2)转移到所述锂带(L0)的第二表面(S2)上，具体包括：
    提供承载有所述第二脱膜剂(G2)的第二转移膜(T2)；
    对所述第二转移膜(T2)和锂带(L0)进行辊压，以将所述第二脱膜剂(G2)转移到锂带(L0)的第二表面(S2)上。
  16. 根据权利要求15所述的极片补锂的方法，其特征在于，所述对所述第二转移膜(T2)和锂带(L0)进行辊压，具体包括：
    周期性的调整用于辊压所述第二转移膜(T2)和锂带(L0)的第一辊子(41)和第二辊子(51)之间的间隙，以在所述锂带(L0)的第二表面(S2)上间断地粘附第二脱膜剂(G2)。
  17. 根据权利要求15或16所述的极片补锂的方法，其特征在于，所述提供承载有第二脱膜剂(G2)的第二转移膜(T2)，具体包括：
    将第二润滑剂(R2)涂布在所述第二转移膜(T2)上，且使所述第二润滑剂(R2)和第二脱膜剂(G2)间隔涂布；
    提供间隔承载有第二润滑剂(R2)和第二脱膜剂(G2)的第二转移膜(T2)。
PCT/CN2020/100292 2019-07-22 2020-07-04 用于极片补锂的装置和极片补锂的方法 WO2021012934A1 (zh)

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CN113675363A (zh) * 2021-08-20 2021-11-19 蜂巢能源科技有限公司 一种极片补锂方法及极片补锂装置

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