EP-4741119-A1 - ELECTRODE PLATE CUTTING MACHINE FOR MANUFACTURING SECONDARY BATTERY AND APPARATUS FOR MANUFACTURING SECONDARY BATTERY INCLUDING THE SAME

EP4741119A1EP 4741119 A1EP4741119 A1EP 4741119A1EP-4741119-A1

Abstract

The present disclosure provides an electrode plate cutting machine and an apparatus for manufacturing a secondary battery, which may prevent foreign substances or cracks from occurring in a mixture portion while an electrode plate is cut and prevent an active material from being transferred to a separator. The electrode plate cutting machine includes an upper cutter installed above a transport path of an electrode plate transported along the transport path, a lower cutter installed below the transport path to cut the electrode plate, and a stripper installed on a side portion of the lower cutter to support the electrode plate upwardly toward the upper cutter while the electrode plate is cut, wherein the stripper includes a main body which provides a supporting force and a supporter supported by the main body and having a relatively low hardness compared to the upper cutter, the lower cutter, and the main body.

Inventors

KWON, JUNHWAN
KIM, JINHWAN
Im, Jongmin
KANG, Bonggeun

Assignees

SAMSUNG SDI CO., LTD.

Dates

Publication Date: 20260513
Application Date: 20250703

Claims (14)

An electrode plate cutting machine for manufacturing a secondary battery, comprising: an upper cutter installed above a transport path of an electrode plate transported along the transport path; a lower cutter installed below the transport path to cut the electrode plate; and a stripper installed on a side portion of the lower cutter to support the electrode plate upwardly toward the upper cutter while the electrode plate is cut, wherein the stripper comprises: a main body which provides a supporting force; and a supporter supported by the main body and having a relatively low hardness compared to the upper cutter, the lower cutter, and the main body.
The electrode plate cutting machine as claimed in claim 1, wherein the supporter comprises a polymer body.
The electrode plate cutting machine of claim 2, wherein the polymer body is a molded polymer body.
The electrode plate cutting machine of claim 1, 2 or 3, wherein the supporter has a plate shape.
The electrode plate cutting machine of any one of claims 1 to 4, wherein the supporter has a multilayered structure on an upper portion of the main body, and an uppermost layer is configured to be in contact with a lower surface of the electrode plate while cutting.
The electrode plate cutting machine as claimed in any one of claims 1 to 5, wherein the main body has an inclined upper surface that is inclined downwardly toward the lower cutter, and the supporter is fixed to the inclined upper surface and has a shape in which a thickness increases from a side opposite to the lower cutter to the lower cutter.
The electrode plate cutting machine as claimed in any one of claims 1 to 6, wherein the supporter is fixedly stacked on an upper portion of the main body, and a cover plate which is configured to receive a pressing force transmitted from the upper cutter while cutting and to transmit the pressing force to the supporter is further provided on the supporter.
The electrode plate cutting machine as claimed in any one of claims 1 to 7, wherein a side groove which opens upward and laterally is formed in a side portion of the main body facing the lower cutter.
The electrode plate cutting machine as claimed in claim 8, wherein a support block is mounted in the side groove.
The electrode plate cutting machine as claimed in claim 9, wherein the supporter is in contact with both the main body and the support block and is configured to transmit a pressing force, which is transmitted from the upper cutter while the electrode plate is cut, downwardly.
The electrode plate cutting machine as claimed in any one of claims 1 to 7, wherein a side groove which opens upwardly and laterally is formed in a side portion of the main body facing the lower cutter, and the supporter is configured to receive a pressing force, which is transmitted from the upper cutter while the electrode plate is cut, while mounted in the side groove.
The electrode plate cutting machine as claimed in any one of claims 1 to 7, wherein a side groove which opens upwardly and laterally is formed in a side portion of the main body facing the lower cutter, and the supporter has a plate shape, and a part of the supporter floats above the side groove while fixed to an upper portion of the main body.
The electrode plate cutting machine as claimed in any one of claim 1 to 7, wherein a mounting groove is formed in a side portion of the main body facing the lower cutter, and the supporter is configured to receive a pressing force, which is transmitted from the upper cutter while the electrode plate is cut, while coupled to and supported by the mounting groove of the side portion of the main body.
An apparatus for manufacturing a secondary battery, comprising: a transport unit configured to transport an electrode plate, which will be cut, along a transport path; a winding unit configured to receive and wind the electrode plate transported by the transport unit; and an electrode plate cutting machine as claimed in any one previous claim.

Description

FIELD The present disclosure relates to the cutting of an electrode plate of a secondary battery, and more specifically, to an electrode plate cutting machine for manufacturing a secondary battery and an apparatus for manufacturing a secondary battery including the same. BACKGROUND Secondary batteries are batteries that can be charged and discharged, unlike primary batteries that cannot be recharged. A 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 herein information disclosed in this Background section is for enhancement of understanding of the background of the present disclosure, and therefore, it may contain information that does not constitute a related (or prior) art. SUMMARY The present disclosure is directed to providing an electrode plate cutting machine for manufacturing a secondary battery and an apparatus for manufacturing a secondary battery, which prevent foreign substances or cracks from occurring in a mixture portion while an electrode plate is cut and prevent an active material from being transferred to a separator. According to an aspect of the present disclosure, there is provided an electrode plate cutting machine for manufacturing a secondary battery, which includes an upper cutter installed above a transport path of an electrode plate transported along the transport path, a lower cutter installed below the transport path to cut the electrode plate, and a stripper installed on a side portion of the lower cutter to support the electrode plate upwardly toward the upper cutter while the electrode plate is cut, wherein the stripper includes a main body which provides a supporting force and a supporter supported by the main body and having a relatively low hardness compared to the upper cutter, the lower cutter, and the main body. According to another aspect of the present disclosure, there is provided an apparatus for manufacturing a secondary battery, which includes a transport unit configured to transport an electrode plate, which will be cut, along a transport path, a winding unit configured to receive and wind the electrode plate transported by the transport unit, and an electrode plate cutting machine having an upper cutter installed above the transport path of the electrode plate, a lower cutter installed below the transport path of the electrode plate to cut the electrode plate, a main body installed on a side portion of the lower cutter to support the electrode plate upwardly toward the upper cutter while the electrode plate is cut and provides a supporting force, and a supporter supported by the main body and having a relatively low hardness compared to the upper cutter, the lower cutter, and the main body. 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. BRIEF DESCRIPTION OF THE DRAWINGS The herein and other objects, features and advantages of the present disclosure will become more apparent to those of ordinary skill in the art by describing embodiments thereof in detail with reference to the accompanying drawings, in which: FIG. 1 is a schematic view illustrating an electrode assembly of a secondary battery which may be manufactured by an apparatus for manufacturing a secondary battery according to embodiments of the present disclosure;FIG. 2 is a view illustrating an interior of a pouch-type battery to which the electrode assembly of FIG. 1 is applied;FIG. 3 is a cross-sectional view illustrating a cylindrical battery which may be manufactured by the apparatus for manufacturing a secondary battery according to embodiments of the present disclosure;FIG. 4 is a perspective view illustrating an exterior of a prismatic battery which may be manufactured by the apparatus for manufacturing a secondary battery according to embodiments of the present disclosure;FIG. 5 is a cross-sectional view along line A-A in FIG. 4;FIG. 6 is a view illustrating a basic configuration of the apparatus for manufacturing a secondary battery according to embodiments of the present disclosure;FIG. 7 is a configuration diagram illustrating a modified example of the apparatus for manufacturing a secondary battery illustrated in FIG. 6;FIG. 8 is a view illustrating another example of the apparatus for manufacturing a secondary battery according to embodiments of the present disclosure;FIG. 9 is a view illustrating a modified example of the apparatus for manufacturing a secondary battery illustrated in FIG. 8;FIG. 10 is a view illustrating another modified example of the