WO2023213123A1 - 涂布系统 - Google Patents

涂布系统 Download PDF

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Publication number
WO2023213123A1
WO2023213123A1 PCT/CN2023/078712 CN2023078712W WO2023213123A1 WO 2023213123 A1 WO2023213123 A1 WO 2023213123A1 CN 2023078712 W CN2023078712 W CN 2023078712W WO 2023213123 A1 WO2023213123 A1 WO 2023213123A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
area
coating
gravure
functional layer
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2023/078712
Other languages
English (en)
French (fr)
Inventor
彭安功
汤振光
商红武
杨棚竣
林银祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
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 Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to KR1020247023034A priority Critical patent/KR102955635B1/ko
Priority to EP23722255.9A priority patent/EP4295960A4/en
Priority to US18/461,471 priority patent/US11944995B2/en
Publication of WO2023213123A1 publication Critical patent/WO2023213123A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0808—Details thereof, e.g. surface characteristics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/083—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0839—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being unsupported at the line of contact between the coating roller and the work
    • 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
    • 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

Definitions

  • the present application relates to the technical field of power batteries, and more specifically, to a coating system.
  • a base coating is generally coated on the substrate first, and then the active material layer and the insulating adhesive layer are simultaneously coated after the base coating dries.
  • the slurries of the active material layer and the insulating adhesive layer are easy to fuse together, resulting in virtual edges or thick edges at the edges of the active material layer, which affects the service life and safety of the battery and leads to a high scrap and defective rate of the base material. .
  • the present application discloses a coating system.
  • a coating system is used to coat a substrate.
  • the substrate includes a first coating area and a second coating area adjacent to the first coating area.
  • the coating system includes a first gravure mechanism and a second gravure mechanism,
  • the first gravure mechanism is used to coat the first functional layer in the first coating area.
  • the second gravure mechanism can receive the substrate with the first functional layer and coat the second functional layer with a different material from the first functional layer. Spread in the second coating area.
  • the above-mentioned coating system by setting up a first gravure mechanism and a second gravure mechanism, can sequentially coat two functional layers with different materials to corresponding areas of the substrate when the substrate is continuously transported in the same direction, and then perform subsequent activation.
  • the coating of the material layer is conducive to improving the continuity and efficiency of coating, and reducing the scrap rate and defective rate of the substrate.
  • the first gravure mechanism includes a first gravure roller and a first liquid storage tank loaded with the first functional layer.
  • the first gravure roller is rotatable relative to the first liquid storage tank and is partially located in the first liquid storage tank. Inside, the surface of the substrate is tangent to the surface of the first gravure roller, and the first gravure roller is rotated to pick up and coat the first functional layer. In this way, as the first gravure roller rotates, the first gravure roller can pick up the first functional layer in the first liquid reservoir and print and apply it to the first coating area.
  • the first gravure roller includes a first roller body.
  • the surface of the first roller body is provided with a first engraving area having a plurality of first textures.
  • the width of the first engraving area is equal to the width of the first coating area. .
  • the second coating area is located at the outer peripheral edge of the first coating area
  • the substrate further includes a second coating area located at the outer edge of the first coating area.
  • the cloth area is a blank area on the side away from the first coating area.
  • the surface of the first roller body is provided with a first blank area adjacent to the first engraving area.
  • the surface of the first blank area is smooth, and the first blank area is arranged on the surface of the first roller body.
  • the width of the white area is greater than the width of the blank area. In this way, the first blank area of the first roller body can be matched one-to-one with the blank area of the substrate to meet coating requirements.
  • the number of the first engraving areas is at least two, and a first blank area is provided between every two adjacent first engraving areas. In this way, coating efficiency and subsequent processing efficiency can be effectively improved.
  • the first gravure mechanism further includes a scraper, and the blade of the scraper is tangent to the surface of the first engraving area and the first blank area. In this way, when the first roller rotates, the slurry adhered to the first engraving area and the first blank area is processed by the scraper, so that the thickness and uniformity of the slurry meet the requirements.
  • the second gravure mechanism is located downstream of the first gravure mechanism in the transport direction of the substrate.
  • the second gravure mechanism includes a second gravure roller and a second liquid storage tank loaded with the second functional layer.
  • the gravure roller can rotate relative to the second liquid storage tank and is partially located in the second liquid storage tank.
  • the surface of the substrate is tangent to the surface of the second gravure roller.
  • the second gravure roller is rotated to pick up and coat the second function. layer. In this way, as the second gravure roller rotates, the second gravure roller can pick up the second functional layer in the second liquid storage tank and print and apply it to the second coating area.
  • the second gravure roller includes a second roller body.
  • the surface of the second roller body is provided with a second engraving area and a second blank area.
  • the width of the second engraving area is equal to the width of the second coating area.
  • the sum of the widths of the second blank area and the second engraving area is equal to the width of the blank area;
  • the surface of the second engraving area is provided with a number of second mesh patterns, and the surface of the second blank area is smooth.
  • the second roller body further includes an escape groove that runs through the peripheral side of the second roller body to communicate with the outside world, and the width of the escape groove is equal to the width of the first coating area. In this way, it can effectively ensure that the second functional layer is not coated in the first coating area and prevent the two functional layers from being mixed during coating.
  • a second blank area is provided between every two adjacent relief grooves, and a second engraved area is provided at both ends of each relief groove. In this way, the coating efficiency can be effectively improved.
  • the coating system further includes a second pass roller, and the second pass roller is disposed between the second gravure roller and the first gravure roller. In this way, a tensioning force can be provided for the substrate between the second gravure roller and the first gravure roller, thereby preventing the substrate from collapsing during transportation and affecting the coating effect.
  • the coating system further includes a pressure roller and a winding roller for placing the substrate.
  • the winding roller is located upstream of the first gravure roller in the transport direction of the substrate and is higher than the first gravure roller in the vertical direction.
  • the gravure roller and the pressure roller are arranged adjacent to the first gravure roller, and they can rotate synchronously in different directions to transport the substrate. In this way, through the action of the first gravure roller and the pressure roller, the contact between the slurry applied to the first coating area and the air is fully reduced, and the first gravure roller is fully contacted with the slurry in the first liquid storage tank, Guaranteed the quality of gravure printing.
  • the coating system further includes a first passing roller, and the first passing roller is disposed between the winding roller and the pressing roller.
  • the first transfer roller can provide tension for the substrate between the winding roller and the pressure roller, preventing the substrate from collapsing during transportation and affecting the coating effect.
  • the first functional layer is a primer slurry
  • the second functional layer is an insulating gel or insulating paint.
  • the active material layer is then coated, which effectively prevents the active material layer and the insulating slurry from fusing together, and avoids causing virtual edges at the edges of the active material layer. Or thick edges appear.
  • Figure 1 is a schematic diagram of electrical equipment in an embodiment
  • Figure 2 is a schematic diagram of a base material in an embodiment
  • Figure 3 is a schematic diagram of a coating system in an embodiment
  • Figure 4 is a schematic diagram of the first gravure roller in the coating system shown in Figure 3;
  • FIG. 5 is a schematic diagram of the second gravure roller in the coating system shown in FIG. 3 .
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.
  • the terms “mounted”, “connected”, “connected”, “fixed” The terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a direct connection or an indirect connection through an intermediate medium. It is the internal connection between two elements or the interactive relationship between two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
  • a first feature being “on” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • lithium-ion batteries as a green and environmentally friendly battery, have the advantages of high energy density, high operating voltage, high safety performance and long service life. They have been widely used in electronic equipment such as mobile phones and digital cameras as well as electric vehicles. With the increasing demand for green energy, environmental protection, energy storage and utilization, lithium-ion batteries have become a bottleneck in solving the development of new energy.
  • the wound lithium-ion battery includes a casing, a battery core and an electrolyte.
  • the electrolyte is poured into the casing, and the battery core is accommodated in the casing loaded with electrolyte.
  • the battery core includes stacked positive electrode sheets, isolation films and negative electrode sheets.
  • the positive electrode sheets and negative electrode sheets need to be prepared first, and then the positive electrode sheets, isolation films and negative electrode sheets are rolled and assembled into a battery core, and then hot and cold pressed and formed , shaping, capacity testing and other processing procedures to form the finished lithium-ion battery.
  • a base coating is generally coated on the substrate first, and then the active material layer and the insulating adhesive layer are simultaneously coated after the base coating dries.
  • the slurries of the active material layer and the insulating adhesive layer are easy to fuse together, resulting in virtual edges or thick edges at the edges of the active material layer, which affects the service life and safety of the battery and leads to a high scrap and defective rate of the base material. .
  • the battery in this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity.
  • the battery mentioned in this application may include a battery pack and the like.
  • the battery may include multiple battery cells, wherein the multiple battery cells may be connected in series, in parallel, or in mixed connection.
  • Hybrid connection refers to a mixture of series and parallel connection.
  • multiple battery cells can be connected in series or parallel
  • the battery modules are connected in series or in parallel to form a battery.
  • multiple battery cells can directly form a battery, or they can first form a battery module, and then the battery module can form a battery.
  • the battery is further installed in the electrical equipment to provide electrical energy to the electrical equipment.
  • the battery cells may include lithium ion secondary batteries, lithium ion primary batteries, lithium-sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, etc., which are not limited in the embodiments of this application.
  • the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited to this.
  • Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, rectangular battery cells and soft-pack battery cells, and the embodiments of the present application are not limited to this.
  • the battery cell includes an electrode assembly and an electrolyte.
  • the electrode assembly consists of a positive electrode sheet, a negative electrode sheet and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the current collector that is not coated with the positive electrode active material layer protrudes from the current collector that is coated with the positive electrode active material layer.
  • the current collector coated with the positive electrode active material layer serves as the positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the current collector that is not coated with the negative electrode active material layer protrudes from the current collector that is coated with the negative electrode active material layer.
  • the current collector coated with the negative active material layer serves as the negative electrode tab.
  • the material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon.
  • the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.
  • the material of the isolation film can be polypropylene (PP) or polyethylene (PE).
  • the electrode assembly may have a rolled structure or a laminated structure, and the embodiments of the present application are not limited thereto.
  • the electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • an electrical device in an embodiment of the present application is a vehicle 40 as an example.
  • FIG. 1 is a schematic structural diagram of a vehicle 40 provided by some embodiments of the present application.
  • the vehicle 40 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc.
  • the battery 50 is disposed inside the vehicle 40 , and the battery 50 can be disposed at the bottom, head, or tail of the vehicle 40 .
  • the battery 50 may be used to power the vehicle 40 , for example, the battery 50 may serve as an operating power source for the vehicle 40 .
  • the vehicle 40 may also include a controller 41 and a motor 42.
  • the controller 41 is used to control the battery 50 to provide power to the motor 42, for example, for the starting, navigation and operating power requirements of the vehicle 40 when driving.
  • the battery 50 can not only be used as an operating power source of the vehicle 40 , but also can be used as a driving power source of the vehicle 40 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 40 .
  • FIG. 2 is a schematic structural diagram of the substrate 10 in the present application. Please refer to Figure 2, a The coating system in the embodiment is used to coat the substrate 10 .
  • the substrate 10 includes a first coating area 11 and a second coating area 13 adjacent to the first coating area 11 .
  • the above-mentioned coating system includes a first gravure mechanism 100 and a second gravure mechanism 200 .
  • the first gravure mechanism 100 is used to coat the first functional layer 20 in the first coating area 11 .
  • the second gravure mechanism 200 receives the substrate 10 with the first functional layer 20 and uses a different material from the first functional layer 20
  • the second functional layer 30 is coated on the second coating area 13 .
  • the above-mentioned coating system by arranging the first gravure mechanism 100 and the second gravure mechanism 200, can sequentially coat two functional layers with different materials to the corresponding areas of the substrate 10 when the substrate 10 is continuously transported in the same direction. Subsequent coating of the active material layer is beneficial to improving the continuity and efficiency of coating, and reducing the scrap rate and defective rate of the substrate 10 .
  • the substrate 10 has two opposite surfaces, and each surface has a first coating area 11 and a second coating area 13.
  • the first functional layer 20 and the second function of one of the surfaces are completed first.
  • the first functional layer 20 and the second functional layer 30 on the other surface are coated, and finally the first coating areas 11 on the two surfaces are respectively covered with active material layers.
  • the first coating area 11 refers to the area divided on the surface of the substrate 10 to carry the first functional layer 20 and the active material layer.
  • the first functional layer 20 covers the substrate.
  • the active material layer covers the surface of the first functional layer 20 .
  • the second coating area 13 refers to an area defined on the surface of the substrate 10 that carries the second functional layer 30 .
  • the functional layer refers to the functional slurry covering the surface of the base material 10 and plays different roles on the surface of the base material 10 depending on the type of slurry.
  • the functional layer can be a primer slurry or an insulating slurry or other functional slurry.
  • the first functional layer 20 is a primer slurry
  • the second functional layer 30 is an insulating gel or insulating paint.
  • the active material layer is then coated, which effectively prevents the active material layer and the insulating slurry from fusing together and avoids causing edges of the active material layer. Virtual edges or thick edges appear.
  • the base material 10 refers to a component or part that carries a functional layer or an active material layer and collects and outputs the current generated by the active material.
  • the base material 10 can be a copper foil or an aluminum foil.
  • aluminum foil can be preferably used as the base material 10 .
  • the primer slurry includes functional materials, binders and conductive agents.
  • the binder can be selected from polyvinylidene fluoride, copolymers of vinylidene fluoride-hexafluoropropylene, polyamide, polyacrylonitrile, and polyacrylate.
  • conductive agent It can be selected from at least one of carbon black, carbon fiber, carbon nanotube, graphite, graphene, metal powder, composite conductive material, and conductive ceramic powder.
  • the insulating glue is at least one of oil-based epoxy resin, bismaleimide resin, water-based polyvinylidene fluoride, and polyimide.
  • Insulating coating is a metal oxide particle coating, and its material components include metal oxide particles, poly Vinylidene fluoride and N-methylpyrrolidone, the material of the metal oxide particles can be selected from aluminum oxide, titanium dioxide, zinc oxide, magnesium oxide and combinations thereof.
  • the active material layer includes at least one of lithium nickel cobalt manganate, lithium iron phosphate, lithium nickelate, lithium nickel manganate and lithium manganese iron nickelate.
  • Active materials are divided into positive active materials and negative active materials. That is, the positive active materials are used in the active material slurry of the positive electrode sheets, and the negative active materials are used in the active material slurry of the negative electrode sheets.
  • the second intaglio mechanism 200 is located downstream of the first intaglio mechanism 100 in the transmission direction of the substrate 10. By sequentially disposing the first intaglio mechanism 100 and the second intaglio mechanism 200 in the transmission direction of the substrate 10, along the When the substrate 10 is continuously transported in the same direction, two functional layers with different materials can be coated on corresponding areas of the substrate 10 in sequence.
  • the second gravure mechanism 200 is located downstream of the first gravure mechanism 100 in the transport direction of the substrate 10. Specifically, when the substrate 10 continues to be transported in the same direction, the substrate 10 will pass through the first gravure mechanism 100 and the second gravure mechanism 100 in sequence. Two gravure mechanisms 200.
  • the first gravure mechanism 100 includes a first gravure roller 120 and a first liquid storage tank 130 loading the first functional layer 20 .
  • the first gravure roller 120 is relative to the first liquid storage tank. 130 can rotate and is partially located in the first liquid storage tank 130.
  • the surface of the substrate 10 is tangent to the surface of the first gravure roller 120, and the first functional layer 20 is picked up and coated by rotating the first gravure roller 120.
  • the first gravure roller 120 can pick up the first functional layer 20 in the first liquid storage tank 130 and print and apply it to the first coating area 11 .
  • the inner diameter of the first liquid storage tank 130 is greater than or equal to the diameter of the first gravure roller 120 .
  • the first gravure roller 120 is partially located in the first liquid storage tank 130, and it should be satisfied that when the first liquid storage tank 130 is loaded with the first functional layer 20, the first gravure roller 120 is partially immersed in the first functional layer 20.
  • the first gravure roller 120 picks up the first functional layer 20 when rotating.
  • the first gravure roller 120 is located in the middle of the first liquid storage tank 130, which facilitates the rotation of the first gravure roller 120 and evenly picks up the first functional layer 20. In other embodiments, the first gravure roller 120 may also be located on the left or right side of the first liquid storage tank 130 .
  • the coating system further includes a pressure roller 110 and a winding roller for placing the substrate 10 .
  • the winding roller is located upstream of the first gravure roller 120 in the transport direction of the substrate 10 . And is higher than the first gravure roller 120 in the vertical direction.
  • the pressure roller 110 is arranged adjacent to the first gravure roller 120 and can rotate synchronously in different directions to transport the substrate 10 .
  • the first gravure roller 120 rotates in the clockwise direction, and the pressure roller 110 rotates synchronously in the counterclockwise direction, so that the first gravure roller 120 can A functional layer 20 is printed and coated on the first coating area 11, and the substrate 10 with the first functional layer 20 is continuously transported to the right.
  • the coating system further includes a first pass roller 300 , which is disposed between the winding roller and the pressure roller 110 .
  • the first transfer roller 300 can provide tensioning force for the substrate 10 between the winding roller and the pressure roller 110 to prevent the substrate 10 from collapsing during transportation and affecting the coating effect.
  • the surface of the first roller 300 is smooth.
  • the first gravure roller 120 includes a first roller body 121, the surface of the first roller body 121 is provided with a first engraving area 122, and the surface of the first engraving area 122 is provided with a plurality of first engraving areas.
  • a net pattern 1221, the width of the first engraving area 122 is equal to the width of the first coating area 11.
  • the width direction is the X direction shown in FIG. 3 .
  • the first mesh pattern 1221 is in the shape of a rhombus mesh. In other embodiments, the first mesh 1221 may also be in the shape of circular pits, rectangular grids or other shapes.
  • the second coating area 13 is provided at the outer peripheral edge of the first coating area 11
  • the substrate 10 further includes a second coating area 13 located away from the first coating area 11 . 12 blank areas on the side.
  • the surface of the first roller body 121 is provided with a first blank area 123 adjacent to the first engraving area 122.
  • the surface of the first blank area 123 is smooth, and the width of the first blank area 123 is greater than the width of the blank area 12. .
  • the blank area 12 can be provided to reserve operating space for subsequent processing steps (such as cutting the substrate 10).
  • the first blank area 123 of the first roller body 121 and the blank area 12 of the substrate 10 can be made to correspond one to one to meet the coating requirements.
  • the blank area 12 refers to an area defined on the surface of the base material 10 that does not carry slurry. By setting the blank area 12, an operating space is reserved for subsequent processing steps (such as cutting the base material 10).
  • the first engraving area 122 refers to an area defined on the surface of the first roller body 121 that can carry the first functional layer 20 .
  • the first blank area 123 refers to an area defined on the surface of the first roller body 121 that does not carry the first functional layer 20 .
  • the second gravure mechanism 200 includes a second gravure roller 210 and a second liquid storage tank 220 loading the second functional layer 30 .
  • the second gravure roller 210 is relative to the second liquid storage tank. 220 can rotate and is partially located in the second liquid storage tank 220.
  • the surface of the substrate 10 is tangent to the surface of the second gravure roller 210.
  • the second functional layer 30 is dipped and coated. In this way, as the second gravure roller 210 rotates, the second gravure roller 210 can pick up the second functional layer 30 in the second liquid storage tank 220 and print and apply it to the second coating area 13 .
  • the second gravure roller 210 is located in the middle of the second liquid storage tank 220, which facilitates the rotation of the second gravure roller 210 and evenly picks up the second functional layer 30. In other embodiments, the second gravure roller 210 may also be located on the left or right side of the second liquid storage tank 220 .
  • the second gravure roller 210 includes a second roller body 211.
  • the surface of the second roller body 211 is provided with a second engraving area 212 and a second blank area 213.
  • the width of 212 is equal to the width of the second coating area 13, and the sum of the widths of the second blank area 213 and the second engraving area 212 is equal to the width of the blank area 12;
  • the surface of the second engraving area 212 is provided with a number of second meshes 2121, the surface of the second blank area 213 is smooth.
  • the number of the first coating areas 11 is at least two
  • the number of the second coating areas 13 is at least four
  • a second coating area 13 is provided on both sides of each coating area.
  • the number of the first engraving areas 122 is at least two
  • the number of the second engraving areas 212 is at least four
  • a second blank area 213 is provided between every two adjacent second engraving areas 212 .
  • the second engraving area 212 refers to an area defined on the surface of the second roller body 211 that can carry the second functional layer 30 .
  • the second blank area 213 refers to an area defined on the surface of the second roller body 211 that does not carry the second functional layer 30 .
  • the second mesh 2121 is in the shape of a rhombus mesh. In other embodiments, the second mesh 2121 may also be in the shape of circular pits, rectangular grids or other shapes.
  • the second roller body 211 also includes an escape groove 214.
  • the escape groove 214 runs through the peripheral side of the second roller body 211 to communicate with the outside world.
  • the width of the escape groove 214 is equal to the first coating layer.
  • the width of zone 11. In this way, it can effectively ensure that the second functional layer 30 is not coated in the first coating area 11 and prevent the two functional layers from being mixed during coating.
  • the number of escape grooves 214 is at least two.
  • a second blank area 213 is provided between every two adjacent escape grooves 214.
  • a second engraved area 212 is provided at both ends of each escape groove 214. .
  • the coating efficiency can be effectively improved.
  • the number of escape grooves 214 may also be one, and may be designed according to actual requirements.
  • the coating system further includes a second pass roller 400 , and the second pass roller 400 is disposed between the second gravure roller 210 and the first gravure roller 120 .
  • a tensioning force can be provided for the base material 10 between the second gravure roller 210 and the first gravure roller 120 to prevent the base material 10 from collapsing during transportation and affecting the coating effect.
  • the surface of the second transfer roller 400 is smooth.
  • the first gravure mechanism 100 includes a pressure roller 110, a winding roller for placing the substrate 10, a first gravure roller 120, a first liquid storage tank 130 for loading the first functional layer 20, a scraper 140 and a first passing roller. 300.
  • the first gravure roller 120 can rotate relative to the first liquid storage tank 130 and is partially located in the first liquid storage tank 130.
  • the surface of the substrate 10 is tangent to the surface of the first gravure roller 120.
  • the first gravure roller 120 includes a first Roller body 121, the surface of the first roller body 121 is provided with a first engraving area 122 and a first blank area 123 adjacent to the first engraving area 122, and the surface of the first engraving area 122 is provided with a plurality of first net patterns 1221 , the width of the first engraving area 122 is equal to the width of the first coating area 11, the surface of the first blank area 123 is smooth, the width of the first blank area 123 is greater than the width of the blank area 12, and the blade of the scraper 140 is The surfaces of the first engraving area 122 and the first blank area 123 are tangential.
  • the winding roller is located upstream of the first gravure roller 120 in the transport direction of the substrate 10 and is higher than the first gravure roller 120 in the vertical direction.
  • the pressure roller 110 and the first gravure roller 120 are arranged adjacent to each other and can move in different directions.
  • the first transfer roller 300 is disposed between the winding roller and the pressure roller 110 .
  • the second gravure mechanism 200 includes a second gravure roller 210, a second liquid storage tank 220 loaded with the second functional layer 30, and a second passing roller 400.
  • the second passing roller 400 is provided on the second gravure roller 210 and the first gravure roller 120. between.
  • the second gravure roller 210 can rotate relative to the second liquid storage tank 220 and is partially located in the second liquid storage tank 220.
  • the surface of the substrate 10 is tangent to the surface of the second gravure roller 210.
  • the second gravure roller 210 includes a second The surface of the roller body 211 and the second roller body 211 is provided with a second engraving area 212, a second blank area 213 and an escape groove 214.
  • the width of the second engraving area 212 is equal to the width of the second coating area 13.
  • the sum of the widths of the white area 213 and the second engraved area 212 is equal to the width of the blank area 12; the surface of the second engraved area 212 is provided with a number of second meshes 2121, and the surface of the second blank area 213 is smooth and avoids grooves.
  • 214 penetrates the peripheral side of the second roller body 211 to communicate with the outside world, and the width of the escape groove 214 is equal to the width of the first coating area 11 .

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Abstract

一种涂布系统，用于涂布基材（10）。基材(10)包括第一涂布区(11)及与第一涂布区(11)相邻的第二涂布区(13)，该涂布系统包括第一凹版机构(100)及第二凹版机构(200)，第一凹版机构(100)用于将第一功能层(20)涂布于第一涂布区(11)，第二凹版机构(200)能接收具有第一功能层(20)的基材(10)，并将与第一功能层(20)材质不同的第二功能层(30)涂布于第二涂布区(13)。该涂布系统，有利于提高涂布的连续性及涂布效率，降低基材的报废率及不良率。

Description

涂布系统
交叉引用
本申请引用于2022年5月5日递交的名称为“涂布系统”的第202221045996.4号中国专利申请，其通过引用被全部并入本申请。
技术领域
本申请涉及动力电池技术领域，更具体的说，涉及一种涂布系统。
背景技术
在极片的制备过程中，一般先在基材上涂布底涂层，等底涂层干燥后再同时涂布活性材料层及绝缘胶层。在涂布时，活性材料层及绝缘胶层的浆料易融合在一起，造成活性材料层边缘虚边或出现厚边，影响电池的使用寿命及安全性，基材的报废及不良率较高。
发明内容
有鉴于此，本申请公开一种涂布系统。
一种涂布系统用于涂布基材，基材包括第一涂布区及与第一涂布区相邻的第二涂布区，涂布系统包括第一凹版机构及第二凹版机构，第一凹版机构用于将第一功能层涂布于第一涂布区，第二凹版机构能接收具有第一功能层的基材，并将与第一功能层材质不同的第二功能层涂布于第二涂布区。上述的涂布系统，通过设置第一凹版机构及第二凹版机构，沿同一方向持续输送基材时，能够将材质不同的两种功能层依次涂布至基材的相应区域，再进行后续活性材料层的涂布，有利于提高涂布的连续性及涂布效率，降低基材的报废率及不良率。
在其中一实施例中，第一凹版机构包括第一凹版辊及装载第一功能层的第一储液槽，第一凹版辊相对于第一储液槽能转动且部分位于第一储液槽内，基材的表面与第一凹版辊的表面相切，通过转动第一凹版辊以沾取并涂布第一功能层。如此，随着第一凹版辊的转动，第一凹版辊能够沾取第一储液槽内的第一功能层并使其印刷涂布至第一涂布区。
在其中一实施例中，第一凹版辊包括第一辊体，第一辊体的表面设置具有若干第一网纹的第一雕刻区，第一雕刻区的宽度等于第一涂布区的宽度。如此，第一辊体转动时，第一储液槽内的浆料能够粘附在第一网纹内，利于浆料涂布。
在其中一实施例中，第二涂布区设于第一涂布区的外周边缘，基材还包括位于第二涂 布区背离第一涂布区一侧的空白区，第一辊体的表面设置与第一雕刻区相邻的第一留白区，第一留白区的表面呈光滑状，且第一留白区的宽度大于空白区的宽度。如此，能够使第一辊体的第一留白区与基材的空白区一一对应，满足涂布需求。
在其中一实施例中，第一雕刻区的数量至少为二，每两相邻的第一雕刻区之间设有一第一留白区。如此，能够有效提高涂布效率及后续加工效率。
在其中一实施例中，第一凹版机构还包括刮刀，刮刀的刀刃与第一雕刻区及第一留白区的表面相切。如此，第一辊体转动时，粘附于第一雕刻区及第一留白区的浆料经过刮刀处理，使得浆料的厚度和均匀度满足要求。
在其中一实施例中，第二凹版机构在基材的传输方向上位于第一凹版机构的下游，第二凹版机构包括第二凹版辊及装载第二功能层的第二储液槽，第二凹版辊相对于第二储液槽能转动且部分位于第二储液槽内，基材的表面与第二凹版辊的表面相切，通过转动第二凹版辊以沾取并涂布第二功能层。如此，随着第二凹版辊的转动，第二凹版辊能够沾取第二储液槽内的第二功能层并使其印刷涂布至第二涂布区。
在其中一实施例中，第二凹版辊包括第二辊体，第二辊体的表面设有第二雕刻区及第二留白区，第二雕刻区的宽度等于第二涂布区的宽度，第二留白区及第二雕刻区的宽度之和等于空白区的宽度；第二雕刻区的表面设有若干第二网纹，第二留白区的表面呈光滑状。如此，第二辊体转动时，第二储液槽内的浆料能够粘附在第二网纹内，利于浆料涂布。
在其中一实施例中，第二辊体还包括避让槽，避让槽贯穿第二辊体的周侧以与外界连通，避让槽的宽度等于第一涂布区的宽度。如此，能够有效保证第二功能层不涂布至第一涂布区，防止两种功能层涂布时混合。
在其中一实施例中，每两相邻的避让槽之间设有一第二留白区，每一避让槽的两端边缘均设有一第二雕刻区。如此，能够有效提高涂布效率。
在其中一实施例中，涂布系统还包括第二过辊，第二过辊设于第二凹版辊及第一凹版辊之间。如此，能够为第二凹版辊及第一凹版辊之间的基材提供张紧力，避免基材在输送过程中坍塌而影响涂布效果。
在其中一实施例中，涂布系统还包括压辊及用于放置基材的收卷辊，收卷辊在基材的传输方向位于第一凹版辊的上游且在竖直方向高于第一凹版辊，压辊与第一凹版辊相邻设置且二者能沿不同方向同步转动以输送基材。如此，经过第一凹版辊及压辊的作用，充分减少涂布至第一涂布区的浆料与空气的接触，且使得第一凹版辊与第一储液槽内的浆料充分接触，保证了凹版印刷的品质。
在其中一实施例中，涂布系统还包括第一过辊，第一过辊设于收卷辊及压辊之间。如此，第一过辊能够为收卷辊及压辊之间的基材提供张紧力，避免基材在输送过程中坍塌而影响涂布效果。
在其中一实施例中，第一功能层为底涂浆料，第二功能层为绝缘胶状物或绝缘涂料。如此，将材质不同的第一功能层及第二功能层涂布于不同区域后，再涂布活性材料层，有效防止活性材料层及绝缘浆料融合在一起，避免造成活性材料层边缘虚边或出现厚边。
附图说明
图1为一实施例中用电设备的示意图；
图2为一实施例中基材的示意图；
图3为一实施例中涂布系统的示意图；
图4为图3所示涂布系统中第一凹版辊的示意图；
图5为图3所示涂布系统中第二凹版辊的示意图。
附图标记：
10、基材；11、第一涂布区；12、空白区；13、第二涂布区；20、第一功能层；30、
第二功能层；40、车辆；41、控制器；42、马达；50、电池；100、第一凹版机构；110、压辊；120、第一凹版辊；121、第一辊体；122、第一雕刻区；1221、第一网纹；123、第一留白区；130、第一储液槽；140、刮刀；200、第二凹版机构；210、第二凹版辊；211、第二辊体；212、第二雕刻区；2121、第二网纹；213、第二留白区；214、避让槽；220、第二储液槽；300、第一过辊；400、第二过辊；X、宽度方向。
具体实施方式
为使本申请的上述目的、特征和优点能够更加明显易懂，下面结合附图对本申请的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本申请。但是本申请能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本申请内涵的情况下做类似改进，因此本申请不受下面公开的具体实施例的限制。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定” 等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
目前，锂离子电池作为一种绿色环保电池，具有高能量密度、高工作电压、高安全性能和长使用寿命等优点，在手机、数码相机等电子设备及电动汽车中得到了广泛的应用。随着绿色能源环保、能源储存利用等方面的需求日益急增，锂离子电池成为解决新能源发展的瓶颈。
锂离子电池有多种类型，卷绕式的锂离子电池使用范围较广。卷绕式锂离子电池包括壳体、电芯及电解液，电解液灌注于壳体内，电芯容置于装载有电解液的壳体内。电芯包括层叠的正极片、隔离膜及负极片，一般需要先制备好正极片及负极片，再将正极片、隔离膜及负极片卷绕组装为电芯，再进行后续热冷压、化成、整形、容量测试等加工工序，以形成锂离子电池成品。
在极片的制备过程中，一般先在基材上涂布底涂层，等底涂层干燥后再同时涂布活性材料层及绝缘胶层。在涂布时，活性材料层及绝缘胶层的浆料易融合在一起，造成活性材料层边缘虚边或出现厚边，影响电池的使用寿命及安全性，基材的报废及不良率较高。
基于以上考虑，为了解决基材的报废及不良率较高的问题，经过深入研究，设计了一种涂布系统，将材质不同的第一功能层及第二功能层涂布于不同区域后，再涂布活性材料层，降低基材的报废率及不良率。
需说明的是，本申请中的电池是指包括一个或多个电池单体以提供更高的电压和容量的单一的物理模块。例如，本申请中所提到的电池可以包括电池包等。
为了满足不同的电力需求，电池可以包括多个电池单体，其中，多个电池单体之间可以串联或并联或混联，混联是指串联和并联的混合。可选地，多个电池单体可以先串联或并 联或混联组成电池模块，多个电池模块再串联或并联或混联组成电池。也就是说，多个电池单体可以直接组成电池，也可以先组成电池模块，电池模块再组成电池。电池再进一步设置于用电设备中，为用电设备提供电能。
本申请中，电池单体可以包括锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。电池单体一般按封装的方式分成三种：柱形电池单体、方体方形电池单体和软包电池单体，本申请实施例对此也不限定。
电池单体包括电极组件和电解液，电极组件由正极片、负极片和隔离膜组成。电池单体主要依靠金属离子在正极片和负极片之间移动来工作。正极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的集流体凸出于已涂覆正极活性物质层的集流体，未涂敷正极活性物质层的集流体作为正极极耳。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的集流体凸出于已涂覆负极活性物质层的集流体，未涂敷负极活性物质层的集流体作为负极极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一起，负极极耳的数量为多个且层叠在一起。隔离膜的材质可以为聚丙烯(PP)或聚乙烯(PE)等。此外，电极组件可以是卷绕式结构，也可以是叠片式结构，本申请实施例并不限于此。
本申请中提供一种用电池作为电源的用电设备，用电设备可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
以下实施例为了方便说明，以本申请一实施例的一种用电设备为车辆40为例进行说明。
请参考图1，图1为本申请一些实施例提供的车辆40的结构示意图。车辆40可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆40的内部设置有电池50，电池50可以设置在车辆40的底部或头部或尾部。电池50可以用于车辆40的供电，例如，电池50可以作为车辆40的操作电源。车辆40还可以包括控制器41和马达42，控制器41用来控制电池50为马达42供电，例如，用于车辆40的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池50不仅可以作为车辆40的操作电源，还可以作为车辆40的驱动电源，代替或部分地代替燃油或天然气为车辆40提供驱动动力。
根据本申请的一些实施例，图2为本申请中基材10的结构示意图。请参考图2，一 实施例中的涂布系统用于涂布基材10，基材10包括第一涂布区11及与第一涂布区11相邻的第二涂布区13。
其中，结合参考图3，上述涂布系统包括第一凹版机构100及第二凹版机构200，。第一凹版机构100用于将第一功能层20涂布于第一涂布区11，第二凹版机构200接收具有第一功能层20的基材10，并将与第一功能层20材质不同的第二功能层30涂布于第二涂布区13。
上述的涂布系统，通过设置第一凹版机构100及第二凹版机构200，沿同一方向持续输送基材10时，能够将材质不同的两种功能层依次涂布至基材10的相应区域，再进行后续活性材料层的涂布，有利于提高涂布的连续性及涂布效率，降低基材10的报废率及不良率。
需说明的是，基材10具有两个相对设置的表面，每一表面均具有第一涂布区11及第二涂布区13，先完成其中一表面的第一功能层20及第二功能层30的涂布后，再完成另一表面的第一功能层20及第二功能层30的涂布，最后在两个表面的第一涂布区11分别覆盖活性材料层。
具体地，第一涂布区11是指基材10表面划分出的承载第一功能层20及活性材料层的区域，在该第一涂布区11内，第一功能层20覆盖于基材10的表面，活性材料层覆盖于第一功能层20的表面。
具体地，第二涂布区13是指基材10表面划分出的承载第二功能层30的区域。
具体地，功能层是指覆盖于基材10表面的功能性浆料，根据浆料种类的不同在基材10的表面起到不同的作用。例如功能层可以为底涂浆料或绝缘浆料或其他功能性浆料。
根据本申请的一些实施例，第一功能层20为底涂浆料，第二功能层30为绝缘胶状物或绝缘涂料。如此，将材质不同的第一功能层20及第二功能层30涂布于不同区域后，再涂布活性材料层，有效防止活性材料层及绝缘浆料融合在一起，避免造成活性材料层边缘虚边或出现厚边。
具体地，基材10是指承载功能层或活性材料层，并将活性材料产生的电流汇集并输出的构件或零件，基材10可以为铜箔或铝箔。但因铝箔的达因值较低，水性浆料涂覆在铝箔表面的表面张力较大，流平性较差，因此在本实施方式中可以优先选用铝箔作为基材10。
具体地，底涂浆料包括功能材料、粘结剂和导电剂，粘结剂可以选自聚偏氟乙烯、偏氟乙烯-六氟丙烯的共聚物、聚酰胺、聚丙烯腈、聚丙烯酸酯、聚丙烯酸、聚丙烯酸盐、羧甲基纤维素钠、聚乙烯吡咯烷酮、聚乙烯醚、聚甲基丙烯酸甲酯、聚四氟乙烯、聚六氟丙烯和丁苯橡胶中至少一种，导电剂可以选自碳黑、碳纤维、碳纳米管、石墨、石墨烯、金属粉末、复合导电材料、导电陶瓷粉末中的至少一种。
具体地，绝缘胶为油基环氧树脂、双马来酰亚胺树脂、水基聚偏氟乙烯、聚亚酰胺中的至少一种。绝缘涂料为金属氧化物颗粒涂层，其材质的成分具体包括金属氧化物颗粒、聚 偏氟乙烯和N-甲基吡咯烷酮，其中的金属氧化物颗粒的材质，又可以从三氧化二铝、二氧化钛、氧化锌、氧化镁及其组合中选择采用。
具体地，活性材料层包括镍钴锰酸锂、磷酸铁锂、镍酸锂、镍锰酸锂和镍酸锰铁锂中的至少一种。活性物质分为正极活性物质和负极活性物质，即正极片的活性物质浆料中使用正极活性物质，负极片的活性物质浆料中使用负极活性物质。
本实施例中，第二凹版机构200在基材10的传输方向上位于第一凹版机构100的下游，通过在基材10的传输方向依次设置第一凹版机构100及第二凹版机构200，沿同一方向持续输送基材10时，能够将材质不同的两种功能层依次涂布至基材10的相应区域。此处，第二凹版机构200在基材10的传输方向上位于第一凹版机构100的下游具体为：基材10沿同一方向持续输送时，基材10会依次经过第一凹版机构100及第二凹版机构200。
根据本申请的一些实施例，参考图3，第一凹版机构100包括第一凹版辊120及装载第一功能层20的第一储液槽130，第一凹版辊120相对于第一储液槽130能转动且部分位于第一储液槽130内，基材10的表面与第一凹版辊120的表面相切，通过转动第一凹版辊120以沾取并涂布第一功能层20。如此，随着第一凹版辊120的转动，第一凹版辊120能够沾取第一储液槽130内的第一功能层20并使其印刷涂布至第一涂布区11。
此处，第一储液槽130的内径大于或等于第一凹版辊120的直径。第一凹版辊120部分位于第一储液槽130内，且应满足第一储液槽130内装载第一功能层20时，第一凹版辊120部分浸没于第一功能层20内，才能使第一凹版辊120转动时沾取到第一功能层20。
本实施例中，第一凹版辊120位于第一储液槽130的中部位置，便于第一凹版辊120转动且均匀沾取第一功能层20。其他实施例中，第一凹版辊120还可以位于第一储液槽130靠左侧或靠右侧的位置。
根据本申请的一些实施例，参考图3，涂布系统还包括压辊110及用于放置基材10的收卷辊，收卷辊在基材10的传输方向位于第一凹版辊120的上游且在竖直方向高于第一凹版辊120，压辊110与第一凹版辊120相邻设置且二者能沿不同方向同步转动以输送基材10。
如此，经过第一凹版辊120及压辊110的作用，充分减少涂布至第一涂布区11的浆料与空气的接触，且使得第一凹版辊120与第一储液槽130内的浆料充分接触，保证了凹版印刷的品质。
例如，当基材10沿图3箭头所示方向持续向右传输时，第一凹版辊120沿顺时针方向转动，压辊110沿逆时针方向同步转动，即可通过第一凹版辊120将第一功能层20印刷涂布至第一涂布区11，并使具有第一功能层20的基材10持续向右输送。
根据本申请的一些实施例，参考图3，涂布系统还包括第一过辊300，第一过辊300设于收卷辊及压辊110之间。如此，第一过辊300能够为收卷辊及压辊110之间的基材10提供张紧力，避免基材10在输送过程中坍塌而影响涂布效果。
具体地，第一过辊300的表面呈光滑状。
根据本申请的一些实施例，参考图4，第一凹版辊120包括第一辊体121，第一辊体121的表面设有第一雕刻区122，第一雕刻区122的表面设有若干第一网纹1221，第一雕刻区122的宽度等于第一涂布区11的宽度。
此处，宽度方向为图3所示X方向。通过上述设置，第一辊体121转动时，第一储液槽130内的浆料能够粘附在第一网纹1221内，利于浆料涂布。
本实施例中，第一网纹1221呈菱形网格状。其他实施例中，第一网纹1221还可以呈圆形凹坑状、矩形网格或其他形状。
根据本申请的一些实施例，参考图4，第二涂布区13设于第一涂布区11的外周边缘，基材10还包括位于第二涂布区13背离第一涂布区11一侧的空白区12。第一辊体121的表面设置与第一雕刻区122相邻的第一留白区123，第一留白区123的表面呈光滑状，第一留白区123的宽度大于空白区12的宽度。
可以理解的是，在基材10上涂布好各功能层及活性层后，通过设置空白区12能够为后续加工工序(如剪裁基材10)预留操作空间。通过上述设置，能够使第一辊体121的第一留白区123与基材10的空白区12一一对应，满足涂布需求。
具体地，空白区12是指在基材10表面划分出的不承载浆料的区域，通过设置空白区12为后续加工工序(如剪裁基材10)预留操作空间。
具体地，第一雕刻区122是指在第一辊体121的表面划分出的能携带第一功能层20的区域。
具体地，第一留白区123是指在第一辊体121的表面划分出的不携带第一功能层20的区域。
本实施例中，参考图4，第一雕刻区122的数量至少为二，每两相邻的第一雕刻区122之间设有一第一留白区123。相应地，基材10也具有至少二个第一涂布区11，每两相邻的第一涂布区11之间设有一空白区12。通过该设置，能够有效提高涂布效率及后续加工效率。
在其他实施例中，第一雕刻区122及第一留白区123的数量也可以为一，根据实际需求进行设置。
根据本申请的一些实施例，请参考图3，第一凹版机构100还包括刮刀140，刮刀140的刀刃与第一雕刻区122及第一留白区123的表面相切。如此，第一辊体121转动时，粘附于第一雕刻区122及第一留白区123的浆料经过刮刀140处理，使得浆料的厚度和均匀度满足要求。
根据本申请的一些实施例，参考图3，第二凹版机构200包括第二凹版辊210及装载第二功能层30的第二储液槽220，第二凹版辊210相对于第二储液槽220能转动且部分位于第二储液槽220内，基材10的表面与第二凹版辊210的表面相切，通过转动第二凹版辊210 以沾取并涂布第二功能层30。如此，随着第二凹版辊210的转动，第二凹版辊210能够沾取第二储液槽220内的第二功能层30并使其印刷涂布至第二涂布区13。
此处，第二储液槽220的内径大于或等于第二凹版辊210的直径。第二凹版辊210部分位于第二储液槽220内，且应满足第二储液槽220内装载第二功能层30时，第二凹版辊210部分浸没于第二功能层30内，才能使第二凹版辊210转动时沾取到第二功能层30。
本实施例中，第二凹版辊210位于第二储液槽220的中部位置，便于第二凹版辊210转动且均匀沾取第二功能层30。其他实施例中，第二凹版辊210还可以位于第二储液槽220靠左侧或靠右侧的位置。
根据本申请的一些实施例，参考图5，第二凹版辊210包括第二辊体211，第二辊体211的表面设有第二雕刻区212及第二留白区213，第二雕刻区212的宽度等于第二涂布区13的宽度，第二留白区213及第二雕刻区212的宽度之和等于空白区12的宽度；第二雕刻区212的表面设有若干第二网纹2121，第二留白区213的表面呈光滑状。如此，第二辊体211转动时，第二储液槽220内的浆料能够粘附在第二网纹2121内，利于浆料涂布。
例如，当第一涂布区11的数量至少为二时，第二涂布区13的数量至少为四，每一涂布区的两侧边缘均设有一第二涂布区13。相对应地，第一雕刻区122的数量至少为二，第二雕刻区212的数量至少为四，每两相邻的第二雕刻区212之间设有一第二留白区213。
具体地，第二雕刻区212是指在第二辊体211的表面划分出的能携带第二功能层30的区域。
具体地，第二留白区213是指在第二辊体211的表面划分出的不携带第二功能层30的区域。本实施例中，第二网纹2121呈菱形网格状。其他实施例中，第二网纹2121还可以呈圆形凹坑状、矩形网格或其他形状。
根据本申请的一些实施例，参考图1，第二辊体211还包括避让槽214，避让槽214贯穿第二辊体211的周侧以与外界连通，避让槽214的宽度等于第一涂布区11的宽度。如此，能够有效保证第二功能层30不涂布至第一涂布区11，防止两种功能层涂布时混合。
本实施例中，避让槽214的数量至少为二，每两相邻的避让槽214之间设有一第二留白区213，每一避让槽214的两端边缘均设有一第二雕刻区212。如此，能够有效提高涂布效率。其他实施例中，避让槽214的数量也可以为一，根据实际需求进行设计。
根据本申请的一些实施例，请参图1，涂布系统还包括第二过辊400，第二过辊400设于第二凹版辊210及第一凹版辊120之间。如此，能够为第二凹版辊210及第一凹版辊120之间的基材10提供张紧力，避免基材10在输送过程中坍塌而影响涂布效果。
具体地，第二过辊400的表面呈光滑状。
根据本申请的一些实施例，参考图2，一实施例中的涂布系统用于涂布基材10，基材10包括第一涂布区11、设于第一涂布区11的外周边缘的第二涂布区13以及位于第二涂布区 13背离第一涂布区11一侧的空白区12。结合参考图3，上述涂布系统包括第一凹版机构100及第二凹版机构200，第二凹版机构200在基材10的传输方向上位于第一凹版机构100的下游，第一凹版机构100用于将第一功能层20涂布于第一涂布区11，第二凹版机构200接收具有第一功能层20的基材10，并将与第一功能层20材质不同的第二功能层30涂布于第二涂布区13。
其中，第一凹版机构100包括压辊110、用于放置基材10的收卷辊、第一凹版辊120、装载第一功能层20的第一储液槽130、刮刀140及第一过辊300。第一凹版辊120相对于第一储液槽130能转动且部分位于第一储液槽130内，基材10的表面与第一凹版辊120的表面相切，第一凹版辊120包括第一辊体121，第一辊体121的表面设有第一雕刻区122及与第一雕刻区122相邻的第一留白区123，第一雕刻区122的表面设有若干第一网纹1221，第一雕刻区122的宽度等于第一涂布区11的宽度，第一留白区123的表面呈光滑状，第一留白区123的宽度大于空白区12的宽度，刮刀140的刀刃与第一雕刻区122及第一留白区123的表面相切。收卷辊在基材10的传输方向位于第一凹版辊120的上游且在竖直方向高于第一凹版辊120，压辊110与第一凹版辊120相邻设置且二者能沿不同方向同步转动以输送基材10，第一过辊300设于收卷辊及压辊110之间。
第二凹版机构200包括第二凹版辊210、装载第二功能层30的第二储液槽220及第二过辊400，第二过辊400设于第二凹版辊210及第一凹版辊120之间。第二凹版辊210相对于第二储液槽220能转动且部分位于第二储液槽220内，基材10的表面与第二凹版辊210的表面相切，第二凹版辊210包括第二辊体211，第二辊体211的表面设有第二雕刻区212、第二留白区213及避让槽214，第二雕刻区212的宽度等于第二涂布区13的宽度，第二留白区213及第二雕刻区212的宽度之和等于空白区12的宽度；第二雕刻区212的表面设有若干第二网纹2121，第二留白区213的表面呈光滑状，避让槽214贯穿第二辊体211的周侧以与外界连通，避让槽214的宽度等于第一涂布区11的宽度。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (14)

  1. 一种涂布系统，用于涂布基材(10)，所述基材(10)包括第一涂布区(11)及与所述第一涂布区(11)相邻的第二涂布区(13)，其特征在于，所述涂布系统包括：
    第一凹版机构(100)，用于将第一功能层(20)涂布于所述第一涂布区(11)；
    第二凹版机构(200)，所述第二凹版机构(200)能接收具有所述第一功能层(20)的所述基材(10)，并将与所述第一功能层(20)材质不同的第二功能层(30)涂布于所述第二涂布区(13)。
  2. 根据权利要求1所述的涂布系统，其特征在于，所述第一凹版机构(100)包括第一凹版辊(120)及装载所述第一功能层(20)的第一储液槽(130)，所述第一凹版辊(120)相对于所述第一储液槽(130)能转动且部分位于所述第一储液槽(130)内，所述基材(10)的表面与所述第一凹版辊(120)的表面相切，通过转动所述第一凹版辊(120)以沾取并涂布所述第一功能层(20)。
  3. 根据权利要求2所述的涂布系统，其特征在于，所述第一凹版辊(120)包括第一辊体(121)，所述第一辊体(121)的表面设置具有若干第一网纹(1221)的第一雕刻区(122)，所述第一雕刻区(122)的宽度等于所述第一涂布区(11)的宽度。
  4. 根据权利要求3所述的涂布系统，其特征在于，所述第二涂布区(13)设于所述第一涂布区(11)的外周边缘，所述基材(10)还包括位于所述第二涂布区(13)背离所述第一涂布区(11)一侧的空白区(12)，所述第一辊体(121)的表面设置与所述第一雕刻区(122)相邻的第一留白区(123)，所述第一留白区(123)的表面呈光滑状，且所述第一留白区(123)的宽度大于所述空白区(12)的宽度。
  5. 根据权利要求4所述的涂布系统，其特征在于，所述第一雕刻区(122)的数量至少为二，每两相邻的所述第一雕刻区(122)之间设有一所述第一留白区(123)。
  6. 根据权利要求4-5任一项所述的涂布系统，其特征在于，所述第一凹版机构(100)还包括刮刀(140)，所述刮刀(140)的刀刃与所述第一雕刻区(122)及所述第一留白区(123)的表面相切。
  7. 根据权利要求4-6任一项所述的涂布系统，其特征在于，在所述基材(10)的传输方向上位于所述第一凹版机构(100)的下游，所述第二凹版机构(200)包括第二凹版辊(210)及装载所述第二功能层(30)的第二储液槽(220)，所述第二凹版辊(210)相对于所述第二储液槽(220)能转动且部分位于所述第二储液槽(220)内，所述基材(10)的表面与所述第二凹版辊(210)的表面相切，通过转动所述第二凹版辊(210)以沾取并涂布所述第二功能层(30)。
  8. 根据权利要求7所述的涂布系统，其特征在于，所述第二凹版辊(210)包括第二辊体(211)，所述第二辊体(211)的表面设有第二雕刻区(212)及第二留白区(213)，所述第二雕刻区(212)的宽度等于所述第二涂布区(13)的宽度，所述第二留白区(213)及所述第二雕刻区(212)的宽度之和等于所述空白区(12)的宽度；
    所述第二雕刻区(212)的表面设有若干第二网纹(2121)，所述第二留白区(213)的表面呈光滑状。
  9. 根据权利要求8所述的涂布系统，其特征在于，所述第二辊体(211)还包括避让槽(214)，所述避让槽(214)贯穿所述第二辊体(211)的周侧以与外界连通，所述避让槽(214)的宽度等于所述第一涂布区(11)的宽度。
  10. 根据权利要求9所述的涂布系统，其特征在于，每两相邻的所述避让槽(214)之间设有一所述第二留白区(213)，每一所述避让槽(214)的两端边缘均设有一所述第二雕刻区(212)。
  11. 根据权利要求7-10任一项所述的涂布系统，其特征在于，所述涂布系统还包括第二过辊(400)，所述第二过辊(400)设于所述第二凹版辊(210)及所述第一凹版辊(120)之间。
  12. 根据权利要求2-11任一项所述的涂布系统，其特征在于，所述涂布系统还包括压辊(110)及用于放置所述基材(10)的收卷辊，所述收卷辊在所述基材(10)的传输方向位于所述第一凹版辊(120)的上游且在竖直方向高于所述第一凹版辊(120)，所述压辊(110)与所述第一凹版辊(120)相邻设置且二者能沿不同方向同步转动以输送所述基材(10)。
  13. 根据权利要求12所述的涂布系统，其特征在于，所述涂布系统还包括第一过辊(300)，所述第一过辊(300)设于所述收卷辊及所述压辊(110)之间。
  14. 根据权利要求1-13任一项所述的涂布系统，其特征在于，所述第一功能层(20)为底涂浆料，所述第二功能层(30)为绝缘胶状物或绝缘涂料。
PCT/CN2023/078712 2022-05-05 2023-02-28 涂布系统 Ceased WO2023213123A1 (zh)

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