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EP-4737014-A1 - COATING APPARATUS

EP4737014A1EP 4737014 A1EP4737014 A1EP 4737014A1EP-4737014-A1

Abstract

The technical idea of the present disclosure provides a coating apparatus including: a first coating die including a first groove, a manifold accommodating a first coating liquid, and a first outlet discharging the first coating liquid; a coating shim inserted into the first coating die and having a first flow path communicating with the manifold and a second groove communicating with the first groove; and a second coating die disposed in the first groove of the first coating die and the second groove of the coating shim and including a second outlet discharging a second coating liquid.

Inventors

  • PARK, SANG WON
  • KIM, GUK TAE
  • PARK, MIN GU
  • KIM, SANG MIN
  • MOON, YOUNG GYU
  • KIM, WON HWI

Assignees

  • LG Energy Solution, Ltd.

Dates

Publication Date
20260506
Application Date
20250328

Claims (15)

  1. A coating apparatus, comprising: a first coating die comprising a first groove, a manifold accommodating a first coating liquid, and a first outlet discharging the first coating liquid; a coating shim inserted into the first coating die and having a first flow path communicating with the manifold and a second groove communicating with the first groove; and a second coating die disposed in the first groove of the first coating die and the second groove of the coating shim and comprising a second outlet discharging a second coating liquid.
  2. The coating apparatus of claim 1, wherein the first coating liquid is an electrode slurry, and the second coating liquid is an insulation liquid.
  3. The coating apparatus of claim 1, wherein the second coating die is configured to move within the first groove of the first coating die.
  4. The coating apparatus of claim 1, wherein the second coating die is configured to move in a first direction parallel to a discharge direction of the first coating liquid within the first groove of the first coating die.
  5. The coating apparatus of claim 4, wherein by movement of the second coating die in the first direction, a distance along the first direction between a first die lip of the first coating die where the first outlet of the first coating die is provided and a second die lip of the second coating die where the second outlet of the second coating die is provided is variable.
  6. The coating apparatus of claim 1, wherein the second coating die is configured to move in a second direction crossing a discharge direction of the first coating liquid within the first groove of the first coating die.
  7. The coating apparatus of claim 6, wherein by movement of the second coating die in the second direction, a distance along the second direction between the first outlet of the first coating die and the second outlet of the second coating die is variable.
  8. The coating apparatus of claim 1, further comprising an actuator that moves the second coating die within the first groove of the first coating die.
  9. The coating apparatus of claim 8, wherein the actuator is configured to move the second coating die in a first direction parallel to a discharge direction of the first coating liquid.
  10. The coating apparatus of claim 8, wherein the actuator is configured to move the second coating die in a second direction crossing a discharge direction of the first coating liquid.
  11. The coating apparatus of claim 1, wherein the coating shim separates the first flow path from the second groove.
  12. The coating apparatus of claim 1, further comprising a piping disposed outside the first coating die and delivering the second coating liquid to the second coating die.
  13. A coating apparatus, comprising: a first coating die comprising a first groove and a first outlet discharging a first coating liquid; a second coating die disposed within the first groove of the first coating die and comprising a second outlet discharging a second coating liquid; and an actuator that moves the second coating die within the first groove of the first coating die.
  14. The coating apparatus of claim 13, wherein the actuator is configured to move the second coating die in a first direction parallel to a discharge direction of the first coating liquid and in a second direction crossing the discharge direction of the first coating liquid.
  15. The coating apparatus of claim 13, wherein the first coating liquid is an electrode slurry, and the second coating liquid is an insulation liquid.

Description

[Technical Field] The present disclosure relates to a coating apparatus. This application claims the benefit of priority from Korean Patent Application No. 10-2024-0044440, filed on April 02, 2024, the entire contents disclosed therein are incorporated by reference into this disclosure. [Background] With technological development and increasing demand for mobile devices, the demand for secondary batteries as an energy source is rapidly increasing, and such secondary batteries include an electrode assembly. The electrode assembly has a form in which a positive electrode, a separator, and a negative electrode are stacked at least once or more, and the positive electrode and the negative electrode are manufactured by applying a coating liquid to current collectors made of aluminum foil and copper foil, respectively. The coating liquid may include an electrode slurry (positive electrode active material slurry or negative electrode active material slurry) and/or an insulation liquid applied to both side portions of the electrode slurry layer to insulate the electrode slurry layer coated with the electrode slurry. [Summary] [Technical Problem] The technical problem to be solved by the present disclosure is to provide a coating apparatus. [Technical Solution] To solve the above-described problem, the technical idea of the present disclosure provides a coating apparatus including: a first coating die including a first groove, a manifold accommodating a first coating liquid, and a first outlet discharging the first coating liquid; a coating shim inserted into the first coating die and having a first flow path communicating with the manifold and a second groove communicating with the first groove; and a second coating die disposed in the first groove of the first coating die and the second groove of the coating shim and including a second outlet discharging a second coating liquid. In exemplary embodiments, the first coating liquid is an electrode slurry, and the second coating liquid is an insulation liquid. In exemplary embodiments, the second coating die is configured to move within the first groove of the first coating die. In exemplary embodiments, the second coating die is configured to move in a first direction parallel to a discharge direction of the first coating liquid within the first groove of the first coating die. In exemplary embodiments, by movement of the second coating die in the first direction, a distance along the first direction between a first die lip of the first coating die where the first outlet of the first coating die is provided and a second die lip of the second coating die where the second outlet of the second coating die is provided is variable. In exemplary embodiments, the second coating die is configured to move in a second direction crossing a discharge direction of the first coating liquid within the first groove of the first coating die. In exemplary embodiments, by movement of the second coating die in the second direction, a distance along the second direction between the first outlet of the first coating die and the second outlet of the second coating die is variable. In exemplary embodiments, further comprising an actuator that moves the second coating die within the first groove of the first coating die. In exemplary embodiments, the actuator is configured to move the second coating die in a first direction parallel to a discharge direction of the first coating liquid. In exemplary embodiments, the actuator is configured to move the second coating die in a second direction crossing a discharge direction of the first coating liquid. In exemplary embodiments, the coating shim separates the first flow path from the second groove. In exemplary embodiments, further comprising a piping disposed outside the first coating die and delivering the second coating liquid to the second coating die. To solve the above-described problem, the technical idea of the present disclosure provides a coating apparatus including: a first coating die including a first groove and a first outlet discharging a first coating liquid; a second coating die disposed within the first groove of the first coating die and including a second outlet discharging a second coating liquid; and an actuator that moves the second coating die within the first groove of the first coating die. In exemplary embodiments, the actuator is configured to move the second coating die in a first direction parallel to a discharge direction of the first coating liquid and in a second direction crossing the discharge direction of the first coating liquid. In exemplary embodiments, the first coating liquid is an electrode slurry, and the second coating liquid is an insulation liquid. [Advantageous Effects] According to exemplary embodiments of the present disclosure, a second coating die configured to discharge an insulation liquid is mounted on a first coating die configured to discharge an electrode slurry, and since a coating shim fo