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WO2025147383A1 - Système de charge et de dispersion de poudre à double fonction - Google Patents

Système de charge et de dispersion de poudre à double fonction Download PDF

Info

Publication number
WO2025147383A1
WO2025147383A1 PCT/US2024/060642 US2024060642W WO2025147383A1 WO 2025147383 A1 WO2025147383 A1 WO 2025147383A1 US 2024060642 W US2024060642 W US 2024060642W WO 2025147383 A1 WO2025147383 A1 WO 2025147383A1
Authority
WO
WIPO (PCT)
Prior art keywords
powder
dispersion
charging
dispersion section
powder particles
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.)
Pending
Application number
PCT/US2024/060642
Other languages
English (en)
Inventor
Omri FLAISHER
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.)
Am Batteries Inc
Original Assignee
Am Batteries Inc
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 Am Batteries Inc filed Critical Am Batteries Inc
Publication of WO2025147383A1 publication Critical patent/WO2025147383A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
    • B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/082—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects
    • B05B5/084—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects the objects lying on, or being supported above conveying means, e.g. conveyor belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1683—Arrangements for supplying liquids or other fluent material specially adapted for particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B05D1/06—Applying particulate materials

Definitions

  • Li-ion batteries have generally become the predominant type of battery used in portable consumer electronics and electric vehicles. Fabrication of Li-ion batteries involves numerous steps, each of which can affect the quality of the battery itself, as well as the cost involved in manufacturing the battery.
  • a conventional manufacturing process generally includes formation of an electrode slurry having an active material, a conductive additive, and a binder, mixed in an organic solvent, and the electrode slurry is applied to a metal foil material. Once applied to the foil material, the solvent is dried out or evaporated while the active electrode mixture remains attached to the metal foil material surface.
  • the solvent may be toxic and can necessitate additional steps for handling/discarding that increase the overall cost of the manufacturing process.
  • the cost of removing the solvent from the coated material on the metal foil therefore involves an additional step that also increases the overall cost of the manufacturing process.
  • ESD electrostatic deposition
  • the ESD process uses a dry powder of the active electrode mixture which is applied to the metal foil material.
  • the solvent-free electrode coating technology is an attractive alternative to traditional manufacturing since it can significantly reduce energy consumption in the manufacturing process and thus significantly reduces the manufacturing cost of batteries.
  • a web e.g., a grounded electrically conductive substrate
  • the electrostatic spray gun electrostatically charges the powders using tribo-charging or corona charging, and sprays the charged powders onto the web where they are deposited.
  • tribo-charging and corona charging are the primary methods in the industry to electrostatically charge the powder.
  • Direct charging is another electrostatically charging process, although it is typically used less often than tribo-charging and corona charging due to the difficulty in assuring that a large majority of the powder particles contact the conductive charging surface.
  • direct charging the particles contact a conductive surface to receive the charge. Difficulty in ensuring that a large percentage of powder particles contact the conductive surface results in a suboptimal charging process.
  • direct charging systems can encounter practical challenges, such as electromagnetically isolating the charged surfaces from external interference or interfering with surrounding devices/systems.
  • Embodiments of the present disclosure provide an exemplary electrostatic deposition coating system that allows for more efficient and effective direct charging of the powder particles.
  • the exemplary system is a dual function powder charging and dispersion system that applies a voltage (using a voltage source) to a powder dispensing/dispersion system.
  • the system being used for dispensing and/or dispersion of powder particles therefore serves as the conductive element for charging the powder particles. As particles pass through or over the dispensing/dispersion system, the powder particles are charged.
  • an exemplary dual function powder charging and dispersion system for powder coating is provided.
  • the system includes a powder particle chamber configured to receive powder particles.
  • the system includes a dispersion section configured to receive the powder particles from the powder particle chamber.
  • the system includes a power supply electrically connected to the dispersion section to supply a current to at least one structure within the dispersion section such that the at least one structure serves as a charging element for charging of the powder particles within the dispersion section.
  • the dispersion section acts as a means for both charging the powder particles within the dispersion section with the charging element and dispersing or dispensing charged powder particles from the dispersion section onto a substrate.
  • the powder particle chamber can be a hopper with an opening adjacent to the dispersion section.
  • the opening is configured to incrementally release the powder particles into the dispersion section.
  • the system can include an insulation and/or isolation layer between the dispersion section and the powder particle chamber.
  • the system can include an insulation and/or isolation layer between the at least one structure of the dispersion section and the powder particle chamber.
  • the at least one structure can be fabricated from a conductive material.
  • the at least one structure of the dispersion section can be a spray nozzle.
  • the at least one structure of the dispersion section can be a distribution pipe with multiple openings formed therein for dispersing or dispensing of the charged powder particles from the distribution pipe.
  • the at least one structure of the dispersion section can be a powder extraction mechanism, and the dispersion section can include a powder feeding roller positioned adjacent to the stripping brush.
  • the at least one structure of the dispersion section can be a scattering roller, and the dispersion section can include a stripping brush positioned adjacent to the scattering roller.
  • the at least one structure of the dispersion section can be both a scattering roller and a stripping brush positioned adjacent to the scattering roller.
  • an exemplary system for powder coating includes a substrate configured to move from a proximal end to a distal end of a containment enclosure.
  • the system includes a dual function powder charging and dispersion system disposed adjacent to the substrate.
  • the dual function powder charging and dispersion system includes a powder particle chamber configured to receive powder particles, a dispersion section configured to receive the powder particles from the powder particle chamber, and a power supply electrically connected to the dispersion section to supply a current to at least one structure within the dispersion section such that the at least one structure serves as a charging element for charging of the powder particles within the dispersion section.
  • the dispersion section acts as a means for both charging the powder particles within the dispersion section with the charging element and dispersing or dispensing charged powder particles from the dispersion section onto the substrate.
  • the at least one structure can be fabricated from a conductive material.
  • the at least one structure of the dispersion section can be at least one of a spray nozzle, a distribution pipe with multiple openings formed therein, a stripping brush positioned adjacent to a scattering roller, or a scattering roller positioned adjacent to the stripping brush.
  • an exemplary method of powder coating includes passing powder particles from a powder particle chamber to a dispersion section of a dual function powder charging and dispersion system.
  • the method includes supplying a current to at least one structure within the dispersion section with a power supply electrically connected to the dispersion section such that the at least one structure serves as a charging element.
  • the method includes charging at least a portion of the powder particles within the dispersion section with the charging element.
  • the dispersion section acts as a means for both charging the powder particles within the dispersion section with the charging element and dispersing or dispensing charged powder particles from the dispersion section onto a substrate.
  • the system can include an insulation and/or isolation layer disposed between the dispersion section and the powder particle chamber.
  • the system includes an insulation and/or isolation layer disposed between the at least one structure of the dispersion section and the powder particle chamber. Contact of the powder particles with the at least one structure within the dispersion section during passage of the powder particles through the dispersion section charges at least a portion of the powder particles prior to dispersing or dispensing of the powder particles from the dispersion section.
  • the at least one structure can be fabricated from a conductive material.
  • the at least one structure of the dispersion section can be at least one of a spray nozzle, a distribution pipe with multiple openings formed therein, a stripping brush positioned adjacent to a scattering roller, or a scattering roller positioned adjacent to the stripping brush.
  • FIG. 1 is a diagrammatic view of an exemplary dual function powder charging and dispersion system in accordance with embodiments of the present disclosure.
  • FIG. 4 is a diagrammatic view of an exemplary dual function powder charging and dispersion system including a spray nozzle in accordance with embodiments of the present disclosure.
  • FIG. 1 is a diagrammatic view of an exemplary dual function powder charging and dispersion system 100 (hereinafter “system 100”).
  • system 100 can be used to manufacture a coated substrate usable in, e.g., Li-ion batteries, solid state batteries, or the like.
  • the system 100 can be incorporated into an containment enclosure (e.g., a containment chamber) for deposition of the powder coating onto a substrate or web 102, e.g., a continuously moving substrate or web 102.
  • the web 102 includes a top surface on which the powder coating is applied.
  • the powder coating includes at least a cathode material or an anode material, e.g., for rechargeable lithium batteries, or the like.
  • the bottom surface of the web 102 can also receive the powder coating either concurrently with the top surface or subsequent to the top surface being coated.
  • Rollers can be positioned on opposite proximal and distal ends of the web 102 and suspend the web 102 as it passes through the containment enclosure. The rollers can rotate in a combined manner to maintain the continuous movement of the web 102 through the containment enclosure in a web direction 104.
  • the system 100 includes a dispersion and/or dispensing section 106.
  • the section 106 can be in the form of, e.g., nozzles, distribution pipes, rollers, scattering wheels, combinations thereof, or the like.
  • the section 106 is positioned adjacent to or offset from the surface of the web 102.
  • the system 100 includes a powder particle source or chamber 108 that feeds powder particles 110 into the section 106.
  • a fan can be positioned within or adjacent to the powder particle chamber 108 to feed or guide the powder particles 110 into the section 106. It should be understood that any mechanism known in the industry can be used to feed the powder particles 110 into the section 106.
  • the system 100 includes a controlled voltage source 112 (e.g., a power source) electrically connected to the section 106 and configured to apply a voltage to the section 106.
  • the voltage can be, e.g., direct current, alternating current, combinations thereof, or the like.
  • the voltage can be in the range of about, e.g., 500-4,000 V inclusive, 500-3,500 V inclusive, 500-3,000 V inclusive, 500-2,500 V inclusive, 500-2,000 V inclusive, 500-1,500 V inclusive, 500-1,000 V inclusive, 1,000-4,000 V inclusive, 1,500- 4,000 V inclusive, 2,000-4,000 V inclusive, 2,500-4,000 V inclusive, 3,000-4,000 V inclusive, 3,500-4,000 V inclusive, 1,000-3,000 V inclusive, 2,000-3,000 V inclusive, 500 V, 1,000 V, 1,500 V, 2,000 V, 2,500 V, 3,000 V, 3,500 V, 4,000 V, or the like.
  • the section 106 can define a housing that surrounds internal components 114, with the interna] components 114 performing the dispersing and/or dispensing action of the section 106.
  • the housing of the section 106 is fabricated from a conductive material, and the voltage source 112 is used to apply a voltage to the conductive material.
  • a controller 116 in communication with the voltage source 112 can be used to regulate the amount of voltage being applied to the section 106 housing.
  • the voltage is only applied to the housing of the section 106 such that only the housing acts as the charging element of the system 100.
  • applying voltage to the section 106 results in at least some of the internal components 114 also acting as charging elements of the system 100 (e.g., in such embodiments, at least a portion of the internal components 114 can be fabricated from a conductive material).
  • the nozzle, roller and/or distribution tube can be fabricated from a conductive material to act as a charging element for the powder particles 110.
  • only the internal components 114 of the section 106 which provide the dispersing and/or dispensing function of the system 100 receive the current from the voltage source 112 act as the charging element for the powder particles 110.
  • the structures making contact with the powder particles 110 can be conductive such that voltage is applied to such structures and transferred to the powder particles 110 during contact.
  • the charged powder particles 406 subsequently exist the nozzle 402 and are sprayed onto the top surface 210 of the web 212 for coating.
  • One or more layers of isolation and/or insulation layer 410 are positioned between the chamber 404 and the spray nozzle 402 to protect the surrounding components of the system 400 from the current supplied to the spray nozzle 402.
  • the entire spray nozzle 402 can be surrounding by the isolation and/or insulation layer 410 (except for the entrance and exit of the spray nozzle 402).
  • the section 408 of the system 400 therefore acts as both a dispensing/dispersing mechanism and a direct charging mechanism for the powder particles 406.

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  • Battery Electrode And Active Subsutance (AREA)

Abstract

L'invention concerne un système de charge et de dispersion de poudre à double fonction pour un revêtement de poudre. Le système inclut une chambre de particules de poudre conçue pour recevoir des particules de poudre. Le système inclut une section de dispersion conçue pour recevoir les particules de poudre en provenance de la chambre de particules de poudre. Le système comprend une alimentation électrique connectée électriquement à la section de dispersion pour fournir un courant à au moins une structure à l'intérieur de la section de dispersion de sorte que l'au moins une structure sert d'élément de charge pour charger les particules de poudre à l'intérieur de la section de dispersion. La section de dispersion agit comme moyen pour à la fois charger les particules de poudre à l'intérieur de la section de dispersion à l'aide de l'élément de charge, et disperser ou distribuer les particules de poudre chargées à partir de la section de dispersion sur un substrat.
PCT/US2024/060642 2024-01-05 2024-12-18 Système de charge et de dispersion de poudre à double fonction Pending WO2025147383A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202463617842P 2024-01-05 2024-01-05
US63/617,842 2024-01-05

Publications (1)

Publication Number Publication Date
WO2025147383A1 true WO2025147383A1 (fr) 2025-07-10

Family

ID=96300506

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2024/060642 Pending WO2025147383A1 (fr) 2024-01-05 2024-12-18 Système de charge et de dispersion de poudre à double fonction

Country Status (1)

Country Link
WO (1) WO2025147383A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929286A (en) * 1975-01-29 1975-12-30 Nordson Corp Apparatus and method for electrostatically spraying highly electrically conductive water-based coating material
DD217999A1 (de) * 1983-10-11 1985-01-30 Thaelmann Schwermaschbau Veb Verfahren und vorrichtung zur elektrostatischen abscheidung von schalen der oelsaaten
US5385086A (en) * 1994-06-21 1995-01-31 Par-Way Group Electrostatic assisted dry ingredient deposition apparatus
US6216966B1 (en) * 1996-10-30 2001-04-17 The Procter & Gamble Company Dispensing devices
US6874712B2 (en) * 2002-09-27 2005-04-05 Abb Inc. Swirl gun for powder particles
US8029960B2 (en) * 2007-03-19 2011-10-04 Ricoh Company Limited Toner for developing electrostatic latent image, and image forming apparatus and process cartridge using the toner
CN208612802U (zh) * 2018-05-02 2019-03-19 东莞市迪沙机电有限公司 粉末静电涂装装置和系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929286A (en) * 1975-01-29 1975-12-30 Nordson Corp Apparatus and method for electrostatically spraying highly electrically conductive water-based coating material
DD217999A1 (de) * 1983-10-11 1985-01-30 Thaelmann Schwermaschbau Veb Verfahren und vorrichtung zur elektrostatischen abscheidung von schalen der oelsaaten
US5385086A (en) * 1994-06-21 1995-01-31 Par-Way Group Electrostatic assisted dry ingredient deposition apparatus
US6216966B1 (en) * 1996-10-30 2001-04-17 The Procter & Gamble Company Dispensing devices
US6874712B2 (en) * 2002-09-27 2005-04-05 Abb Inc. Swirl gun for powder particles
US8029960B2 (en) * 2007-03-19 2011-10-04 Ricoh Company Limited Toner for developing electrostatic latent image, and image forming apparatus and process cartridge using the toner
CN208612802U (zh) * 2018-05-02 2019-03-19 东莞市迪沙机电有限公司 粉末静电涂装装置和系统

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