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KR-20260066923-A - secondary battery manufacturing apparatus and secondary battery manufacturing method

KR20260066923AKR 20260066923 AKR20260066923 AKR 20260066923AKR-20260066923-A

Abstract

A secondary battery manufacturing apparatus according to various embodiments of the present disclosure may include a mold part that provides a primary pressing force in a first direction to a molding area of a battery case and provides a secondary pressing force in a second direction opposite to the first direction to the molding area deformed by the primary pressing force.

Inventors

  • 최승원
  • 문학봉
  • 변재규
  • 정문형

Assignees

  • 에스케이온 주식회사

Dates

Publication Date
20260512
Application Date
20241105

Claims (20)

  1. A secondary battery manufacturing apparatus comprising a mold part that provides a primary pressing force in a first direction to a molding area of a battery case and provides a secondary pressing force in a second direction opposite to the first direction to the molding area deformed by the primary pressing force.
  2. In paragraph 1, A secondary battery manufacturing device in which the first direction is a direction away from the central axis of the battery case.
  3. In paragraph 1, A secondary battery manufacturing device in which the above secondary pressure is smaller than the above primary pressure.
  4. In paragraph 1, A secondary battery manufacturing device in which the above-mentioned molding region is formed axially above the electrode assembly accommodated inside the battery case.
  5. In paragraph 1, The above-mentioned molding region is a secondary battery manufacturing apparatus that includes a region in which a beading portion is formed among the side walls of the battery case.
  6. In paragraph 1, A secondary battery manufacturing device in which the molding area is deformed to protrude radially outward from the battery case by the first pressing force, and the molding area is deformed to sink radially inward from the battery case by the second pressing force.
  7. In paragraph 1, A secondary battery manufacturing device in which the above-mentioned mold part rotates and provides the above-mentioned primary pressure or the above-mentioned secondary pressure.
  8. In paragraph 1, A secondary battery manufacturing device that provides the primary pressing force while at least a portion of the mold portion is received inside the battery case.
  9. In paragraph 1, It includes a control unit that controls the position of the above-mentioned mold part, and The control unit is a secondary battery manufacturing device that moves the mold unit from a first position for providing the first pressing force to the side wall of the battery case to a second position for providing the second pressing force to the side wall of the battery case.
  10. In paragraph 1, A secondary battery manufacturing device comprising a first mold part providing the first pressing force and a second mold part providing the second pressing force.
  11. In paragraph 1, It includes a backup roller positioned on the opposite side of the mold part with respect to the battery case, and The above backup roller is positioned to support at least one of the upper or lower regions of the molding area in a secondary battery manufacturing device.
  12. In paragraph 1, A first rotating jig that supports one side of the outside of the battery case to rotate the battery case while the above first pressing force is provided; and A secondary battery manufacturing device comprising a second rotating jig that supports one side of the interior of the battery case and rotates the battery case while the second pressing force is provided.
  13. In a secondary battery manufacturing apparatus for forming a beading portion on a battery case of a secondary battery, A first mold having at least a portion disposed inside the battery case and pressurizing the molding area of the side wall of the battery case to protrude radially outward; and It includes a second mold that presses the molding area, which protrudes radially outward by the first mold, so that it is sunk radially inward. A secondary battery manufacturing device in which the direction of the pressure applied by the first mold and the direction of the pressure applied by the second mold are opposite to each other.
  14. A primary molding step of providing a primary pressing force in a first direction to a molding area of a battery case; and A method for manufacturing a secondary battery comprising a secondary molding step of providing a secondary pressure in a second direction opposite to the first direction to the molding area deformed by the first pressure.
  15. In Paragraph 13, A method for manufacturing a secondary battery in which the first direction is a direction away from the central axis of the battery case.
  16. In Paragraph 13, A method for manufacturing a secondary battery in which the above secondary pressure is smaller than the above primary pressure.
  17. In Paragraph 13, A method for manufacturing a secondary battery in which the above-mentioned molding region is formed above the electrode assembly accommodated inside the battery case.
  18. In Paragraph 13, In the above first molding step, the molding area is deformed to protrude radially outward from the battery case by the above first pressing force, and A method for manufacturing a secondary battery in which, in the second molding step, the molding area is deformed into the radial inner side of the battery case by the second pressing force.
  19. In Paragraph 13, A method for manufacturing a secondary battery, comprising a mold part moving step of moving the mold part that performed the first molding step to a position for performing the second molding step after the first molding step is completed.
  20. In Paragraph 13, A method for manufacturing a secondary battery in which the above-mentioned second molding step is performed after the deformation of the molding area in the above-mentioned first molding step.

Description

Secondary battery manufacturing apparatus and secondary battery manufacturing method The present disclosure relates to a secondary battery manufacturing apparatus and a secondary battery manufacturing method. Various types of secondary batteries are used as energy sources in electric vehicles or electronic devices. Secondary batteries use jelly-roll type electrode assemblies in which a negative plate, a positive plate, and a separator are wound together, or electrode assemblies manufactured by stacking a negative plate, a positive plate, and a separator in an appropriate order are also used. These electrode assemblies are housed inside a battery housing and connected to the negative and positive terminals, and the interior of the housing is sealed while filled with electrolyte. FIG. 1 is a schematic cross-sectional view of a secondary battery that can be manufactured by a secondary battery manufacturing apparatus and method according to an exemplary embodiment of the present disclosure. FIGS. 2 and 3 are schematic diagrams for illustrating a secondary battery manufacturing apparatus and method according to an exemplary embodiment of the present disclosure. FIGS. 4 and 5 are schematic diagrams for illustrating a secondary battery manufacturing apparatus and method according to an exemplary embodiment of the present disclosure. FIG. 6 is a flowchart of a method for manufacturing a secondary battery according to an exemplary embodiment of the present disclosure. FIG. 7 is a flowchart of a method for manufacturing a secondary battery according to an exemplary embodiment of the present disclosure. As used in this specification, the singular form may include the plural form unless the context clearly indicates otherwise. Furthermore, expressions such as “comprise, include,” “consist of,” and “have” used to describe and assert the present disclosure shall be interpreted in a non-exclusive manner and, unless specifically stated otherwise, imply that the relevant component may be inherent, and thus shall be interpreted as allowing for the inclusion of additional components rather than excluding other components. It should be understood that the attached drawings are schematic representations of the features of the present disclosure and may be reduced or enlarged compared to the actual size, and are depicted in an exaggerated or omitted manner. The secondary battery described in the present disclosure may be any type of conventional battery capable of converting the chemical energy of materials stored in the battery into electrical energy and capable of multiple charge/discharge cycles. FIG. 1 is a schematic cross-sectional view of a secondary battery that can be manufactured by a secondary battery manufacturing apparatus and method according to an exemplary embodiment of the present disclosure. Referring to FIG. 1, a secondary battery (1) that can be manufactured by a secondary battery manufacturing apparatus and method according to various embodiments of the present disclosure may include an electrode assembly (20), a battery case (30), and a cap assembly (40). First, the electrode assembly (20) may include a first electrode plate (not shown), a second electrode plate (not shown), and a separator (not shown). The electrode assembly (20) may be in a form that is wound around a winding axis while the first electrode plate and the second electrode plate are arranged so as not to come into contact with each other through the separator. For example, the first electrode plate may be a cathode plate. In an exemplary embodiment, the first electrode plate may include a first coating portion in which a cathode coating layer is formed on a cathode current collector in the form of a metal foil, and a first uncoated portion in which a cathode coating layer is not formed. For example, the second electrode plate may be an anode plate. The second electrode plate may include a second coating portion in which an anode active material is coated on an anode current collector in the form of a metal foil, and a second non-coated portion in which an anode active material is not coated on the anode current collector. The first and second unexposed portions are each exposed at the axial ends of the electrode assembly, thereby defining electrode tabs. A separator is interposed between the first electrode plate and the second electrode plate to prevent the first electrode plate and the second electrode plate from being electrically connected to each other and short-circuiting. The battery case (30) may be formed in a cylindrical shape having an internal space. For example, the battery case (30) may be formed with an open axial top end. The battery case (30) may be formed of a metal material and may include, for example, a plating layer to ensure corrosion resistance. Here, for the sake of understanding, the battery case (30) is described as having a cylindrical shape, but this is exemplary, and it should be understood that the secondary bat