CN-122000487-A - Apparatus for manufacturing secondary battery and electrode plate cutting unit

Abstract

The present disclosure provides an apparatus for manufacturing a secondary battery and an electrode plate cutting unit capable of preventing cracks or impurities from occurring in a mixture portion and preventing an active material from being transferred to a separator by reducing a load applied to a load concentration region of an electrode plate when the electrode plate is cut. An apparatus for manufacturing a secondary battery includes a transfer unit configured to transfer an electrode plate, a winding unit configured to wind the electrode plate, and a cutting unit having an upper cutter, a lower cutter, and a stripper installed on a side portion of the lower cutter, the stripper being configured to support the electrode plate to transfer a reaction force corresponding to a downward force of the upper cutter to the electrode plate when the upper cutter moves downward, and to provide a stress relief space for preventing the reaction force from being transferred to a portion of the electrode plate to which a shearing force is applied due to the upper cutter and the lower cutter.

Inventors

• Quan Junhuan
• JIN ZHENHUAN
• Lin Zhongmen
• JIANG FENGXIN

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260508

Application Date

20250709

Priority Date

20241106

Claims (16)

1. 1. An apparatus for manufacturing a secondary battery, comprising: A conveying unit configured to convey the electrode plate to be cut along a conveying path; a winding unit configured to receive and wind the electrode plate conveyed by the conveying unit, and A cutting unit having: an upper cutter installed above the conveying path, A lower cutter mounted below the conveying path, and And a stripper installed on a side portion of the lower cutter, the stripper being configured to support the electrode plate to transmit a reaction force corresponding to a downward force of the upper cutter to the electrode plate when the upper cutter moves downward, and to provide a stress relief space for preventing the reaction force from being transmitted to a portion of the electrode plate to which a shearing force is applied due to the upper cutter and the lower cutter.
2. 2. The apparatus according to claim 1, wherein the stripper has an upper surface in contact with a lower surface of the electrode plate and a side surface facing the lower cutter, and The stress relief space is a space between the lower cutter, the electrode plate, and a removal surface formed by removing a corner where the upper surface meets the side surface.
3. 3. The apparatus of claim 2, wherein the removal surface is a bottom surface of a groove recessed in the stripper.
4. 4. The apparatus of claim 1, wherein the stripper comprises: A stripper body having an upper surface contacting a lower surface of the electrode plate and a side surface facing the lower cutter, and having a mounting groove in a portion where the upper surface and the side surface intersect, and A stationary tip mounted in the mounting groove, and The stress relief space is a space between a removal surface formed by removing a portion of the stationary tip, the lower cutter, and the electrode plate.
5. 5. The apparatus of claim 2 or 4, wherein the removal surface is a flat sloped surface.
6. 6. The apparatus of claim 2 or 4, wherein the removal surface is a curved surface having a preset curvature.
7. 7. The apparatus of claim 1, wherein the stripper comprises: A stripper body having a fixed inclined surface facing a blade formed at an upper end of the lower cutter, and And an inclined plate installed on the fixed inclined surface and providing the stress relief space between the lower cutter and the electrode plate.
8. 8. The apparatus of claim 7, wherein the inclined plate is provided as a plurality of inclined plates mounted by being stacked on the fixed inclined surface, each of the plurality of inclined plates being a plate-like member.
9. 9. An electrode plate cutting unit comprising: an upper cutter installed above the conveying path of the electrode plate conveyed along the conveying path; a lower cutter installed below the conveying path, and And a stripper installed on a side portion of the lower cutter, the stripper being configured to support the electrode plate to transmit a reaction force corresponding to a downward force of the upper cutter to the electrode plate when the upper cutter moves downward, and to provide a stress relief space for preventing the reaction force from being transmitted to a portion of the electrode plate to which a shearing force is applied due to the upper cutter and the lower cutter.
10. 10. The electrode plate cutting unit according to claim 9, wherein the stripper has an upper surface contacting a lower surface of the electrode plate and a side surface facing the lower cutter, and The stress relief space is a space between the lower cutter, the electrode plate, and a removal surface formed by removing a corner where the upper surface meets the side surface.
11. 11. The electrode plate cutting unit of claim 10, wherein the removal surface is a bottom surface of a groove recessed in the stripper.
12. 12. The electrode plate cutting unit according to claim 9, wherein the stripper comprises: A stripper body having an upper surface contacting a lower surface of the electrode plate and a side surface facing the lower cutter, and having a mounting groove in a portion where the upper surface and the side surface intersect, and A stationary tip mounted in the mounting groove, and The stress relief space is a space between a removal surface formed by removing a portion of the stationary tip, the lower cutter, and the electrode plate.
13. 13. The electrode plate cutting unit according to claim 10 or 12, wherein the removal surface is a flat inclined surface.
14. 14. The electrode plate cutting unit according to claim 10 or 12, wherein the removal surface is a curved surface having a preset curvature.
15. 15. The electrode plate cutting unit according to claim 9, wherein the stripper comprises: A stripper body having a fixed inclined surface facing a blade formed at an upper end of the lower cutter, and And an inclined plate installed on the fixed inclined surface and providing the stress relief space between the lower cutter and the electrode plate.
16. 16. The electrode plate cutting unit according to claim 15, wherein the inclined plate is provided as a plurality of inclined plates mounted by being stacked on the fixed inclined surface, each of the plurality of inclined plates being a plate-like member.

Description

Apparatus for manufacturing secondary battery and electrode plate cutting unit Technical Field The present disclosure relates to the manufacture of secondary batteries, and more particularly, to an apparatus for manufacturing a secondary battery and an electrode plate cutting unit. Background Unlike a primary battery that cannot be recharged, a secondary battery is a chargeable and dischargeable battery. The secondary battery may generally include an electrode assembly including a positive electrode plate, a separator, and a negative electrode plate, a case (or can) for accommodating the electrode assembly, a substrate tab formed by extending an uncoated portion of each electrode plate of the electrode assembly, an external terminal connected to the substrate tab, and the like. The electrode assembly received in the case includes a stack type and a jelly roll type. The jelly-roll type electrode assembly is manufactured by winding a continuously supplied electrode plate using a winding device. The winding device comprises an electrode plate cutting machine. The electrode plate cutter is a device for cutting electrode plates at a designed length interval, and includes an upper cutter and a lower cutter. The information disclosed herein in this background section is for enhancement of understanding of the background of the disclosure and, therefore, it may contain information that does not constitute a related (or prior) art. Disclosure of Invention The present disclosure is directed to an apparatus for manufacturing a secondary battery and an electrode plate cutting unit capable of preventing cracks or impurities from occurring in a mixture portion by reducing a load applied to a load concentrating region of an electrode plate when the electrode plate is cut. According to an aspect of the present disclosure, there is provided an apparatus for manufacturing a secondary battery, including a conveying unit configured to convey an electrode plate to be cut along a conveying path, a winding unit configured to receive and wind the electrode plate conveyed by the conveying unit, and a cutting unit having an upper cutter mounted above the conveying path of the electrode plate, a lower cutter mounted below the conveying path, and a stripper mounted on a side portion of the lower cutter, the stripper being configured to support the electrode plate to transmit a reaction force corresponding to a downward force of the upper cutter to the electrode plate when the upper cutter moves downward, and to provide a stress relief space for preventing the reaction force from being transmitted to a portion of the electrode plate to which a shearing force is applied due to the upper cutter and the lower cutter. According to another aspect of the present invention, there is provided an electrode plate cutting unit including an upper cutter installed above a transfer path of an electrode plate transferred along the transfer path, a lower cutter installed below the transfer path, and a stripper installed on a side portion of the lower cutter, the stripper being configured to support the electrode plate to transfer a reaction force corresponding to a downward force of the upper cutter to the electrode plate when the upper cutter moves downward, and to provide a stress relief space for preventing the reaction force from being transferred to a portion of the electrode plate to which a shearing force is applied due to the upper cutter and the lower cutter. Aspects and features of the present disclosure are not limited to those described herein, and other aspects and features not specifically mentioned herein will be clearly understood by those skilled in the art from the description of the present disclosure herein. Drawings Other objects, features and advantages herein and of the present disclosure will become more readily apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which: Fig. 1 is a schematic view illustrating an electrode assembly of a secondary battery that may be manufactured by an apparatus for manufacturing a secondary battery according to an embodiment of the present disclosure; Fig. 2 is a view illustrating the inside of a pouch-type secondary battery to which the electrode assembly of fig. 1 is applied; Fig. 3 is a sectional view illustrating a cylindrical secondary battery that may be manufactured by an apparatus for manufacturing a secondary battery according to an embodiment of the present disclosure; fig. 4 is a perspective view illustrating the exterior of a prismatic secondary battery that may be manufactured by an apparatus for manufacturing a secondary battery according to an embodiment of the present disclosure; FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4; Fig. 6 is a schematic view illustrating a configuration of an apparatus for manufacturing a secondary battery according to an embodiment of the pre