CN-122000408-A - Secondary battery manufacturing device and secondary battery manufacturing method

CN122000408ACN 122000408 ACN122000408 ACN 122000408ACN-122000408-A

Abstract

The secondary battery manufacturing apparatus according to various embodiments of the present disclosure may include a mold part applying a primary pressure to a molding region of a battery case in a first direction and applying a secondary pressure to the molding region deformed by the primary pressure in a second direction opposite to the first direction. According to the secondary battery manufacturing apparatus and the secondary battery manufacturing method of the various embodiments of the present disclosure, by first performing pressurization in the opposite direction to the pressurization direction for molding the final curled portion, it is possible to minimize the pressure applied to the side wall during the molding of the final curled portion of the side wall of the battery case.

Inventors

Cui Chengyuan
WEN XUEFENG
Bian Zaikui
Zheng Wenjiong

Assignees

SK新能源株式会社

Dates

Publication Date: 20260508
Application Date: 20251031
Priority Date: 20241105

Claims (15)

1. A secondary battery manufacturing apparatus comprising: And a die part for applying a primary pressure to a molding region of the battery case in a first direction and applying a secondary pressure to the molding region deformed by the primary pressure in a second direction opposite to the first direction.
2. The secondary battery manufacturing apparatus according to claim 1, wherein, The first direction is a direction away from a central axis of the battery case.
3. The secondary battery manufacturing apparatus according to claim 1, wherein, The secondary pressure is less than the primary pressure.
4. The secondary battery manufacturing apparatus according to claim 1, wherein, The molding region is formed axially upward compared to an electrode assembly housed inside the battery case.
5. The secondary battery manufacturing apparatus according to claim 1, wherein, The molding region includes a region in the sidewall of the battery case where a beading part is formed.
6. The secondary battery manufacturing apparatus according to claim 1, wherein, The molding region is convexly deformed to the radial outside of the battery case under the action of the primary pressure, and the molding region is concavely deformed to the radial inside of the battery case under the action of the secondary pressure.
7. The secondary battery manufacturing apparatus according to any one of claims 1 to 6, comprising: A control part for controlling the position of the mold part, The control portion is configured to move the mold portion from a first position for applying the primary pressure to the side wall of the battery case to a second position for applying the secondary pressure to the side wall of the battery case.
8. The secondary battery manufacturing apparatus according to any one of claims 1 to 6, The mold sections include a first mold section that applies the primary pressure and a second mold section that applies the secondary pressure.
9. The secondary battery manufacturing apparatus according to any one of claims 1 to 6, comprising: A first rotating jig that supports one side of an outside of the battery case to rotate the battery case during the application of the primary pressure, and And a second rotating jig that supports one side of the inside of the battery case to rotate the battery case during application of the secondary pressure.
10. A secondary battery manufacturing method, comprising: a first molding step of applying a primary pressure to the molding region of the battery case in a first direction, and And a second molding step of applying a second pressure to the molding region deformed by the first pressure in a second direction opposite to the first direction.
11. The method for manufacturing a secondary battery according to claim 10, wherein, The first direction is a direction away from a central axis of the battery case.
12. The method for manufacturing a secondary battery according to claim 10, wherein, The secondary pressure is less than the primary pressure.
13. The method for manufacturing a secondary battery according to claim 10, wherein, The molding region is formed above as compared to an electrode assembly received in the interior of the battery case.
14. The method for manufacturing a secondary battery according to claim 10, wherein, In the first molding step, the molding region is convexly deformed to the radially outer side of the battery case under the action of the primary pressure, In the second molding step, the molding region is concavely deformed toward the radially inner side of the battery case by the secondary pressure.
15. The method for manufacturing a secondary battery according to any one of claims 10 to 14, After the first molding step is completed, a mold portion moving step of moving the mold portion on which the first molding step is performed to a position for performing the second molding step is included.

Description

Secondary battery manufacturing device and secondary battery manufacturing method Technical Field The present disclosure relates to the field of secondary battery technologies, and in particular, to a secondary battery manufacturing apparatus and a secondary battery manufacturing method. Background Secondary batteries of various forms are used as energy sources in electric vehicles or electronic devices. The secondary battery uses an electrode assembly in the form of a roll (ball-roll) formed by winding a negative electrode plate, a positive electrode plate, and a separator together, or an electrode assembly manufactured by stacking (stacking) the negative electrode plate, the positive electrode plate, and the separator in an appropriate order. The electrode assembly is accommodated in the interior of a battery case, is connected to a negative electrode terminal and a positive electrode terminal, and is sealed in a state in which the interior of the case is filled with an electrolyte. Disclosure of Invention Technical problem to be solved The present disclosure may provide a secondary battery manufacturing apparatus and a secondary battery manufacturing method capable of minimizing damage of a battery case during manufacturing of a secondary battery. Technical proposal The secondary battery manufacturing apparatus according to various embodiments of the present disclosure may include a mold part applying a primary pressure to a molding region of a battery case in a first direction and applying a secondary pressure to the molding region deformed by the primary pressure in a second direction opposite to the first direction. In an exemplary embodiment, the first direction may be a direction away from a central axis of the battery case. In an exemplary embodiment, the secondary pressure may be less than the primary pressure. In an exemplary embodiment, the molding region may be formed axially upward as compared to an electrode assembly received in the interior of the battery case. In an exemplary embodiment, the molding region may include a region in the sidewall of the battery case where a beading part is formed. In an exemplary embodiment, the molding region may be convexly deformed toward a radial outer side of the battery case under the primary pressure, and the molding region may be concavely deformed toward a radial inner side of the battery case under the secondary pressure. In an exemplary embodiment, the mold part may apply the primary pressure or the secondary pressure while rotating. In an exemplary embodiment, the mold part may apply the primary pressure in a state where at least a portion is accommodated in the interior of the battery case. In an exemplary embodiment, the battery pack includes a control part for controlling a position of the mold part, and the control part may move the mold part from a first position for applying the primary pressure to the side wall of the battery case to a second position for applying the secondary pressure to the side wall of the battery case. In an exemplary embodiment, the mold part may include a first mold part applying the primary pressure and a second mold part applying the secondary pressure. In an exemplary embodiment, a support roller is provided on the opposite side of the mold part with respect to the battery case, and the support roller may be provided to support at least one of an upper portion or a lower portion of the molding region. In an exemplary embodiment, a first rotating jig that supports one side of an outside of the battery case to rotate the battery case during the application of the primary pressure, and a second rotating jig that supports one side of an inside of the battery case to rotate the battery case during the application of the secondary pressure may be included. The secondary battery manufacturing apparatus according to various embodiments of the present disclosure includes, as a secondary battery manufacturing apparatus for forming a beading portion in a battery case of a secondary battery, a first mold at least a portion of which is provided inside the battery case for pressurizing a molding region of a side wall of the battery case so as to protrude radially outward, and a second mold for pressurizing the molding region protruding radially outward under the action of the first mold so as to be depressed radially inward, the direction of the pressure of the first mold and the direction of the pressure of the second mold being opposite to each other. The secondary battery manufacturing method according to various embodiments of the present disclosure may include a first molding step of applying a primary pressure to a molding region of a battery case to a first direction, and a second molding step of applying a secondary pressure to the molding region deformed by the primary pressure to a second direction opposite to the first direction. In an exemplary embodiment, the first direction may be a direction away from a central axi