EP-4741126-A1 - ELECTRODE PLATE CUTTING MACHINE FOR SECONDARY BATTERY AND SECONDARY BATTERY MANUFACTURING APPARATUS HAVING ELECTRODE PLATE CUTTING MACHINE

EP4741126A1EP 4741126 A1EP4741126 A1EP 4741126A1EP-4741126-A1

Abstract

An electrode plate cutting machine includes an upper cutting unit having an upper cutter installed above a transport path of an electrode plate transported along the transport path, and an upper stripper disposed at a side portion of the upper cutter to press the electrode plate downwardly and support the electrode plate when cutting the electrode plate, and a lower cutting unit having a lower cutter installed below the upper cutting unit with the electrode plate interposed therebetween to cut the electrode plate through cross movement with the upper cutter, and a lower stripper positioned at a side portion of the lower cutter to support the electrode plate upwardly toward the upper cutter when cutting the electrode plate.

Inventors

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

Assignees

SAMSUNG SDI CO., LTD.

Dates

Publication Date: 20260513
Application Date: 20250715

Claims (11)

An electrode plate cutting machine for a secondary battery, comprising: an upper cutting unit having an upper cutter configured to be installed above a transport path of an electrode plate transported along the transport path, and an upper stripper disposed at a side portion of the upper cutter, wherein the upper stripper is configured to press the electrode plate downwardly and support the electrode plate when cutting the electrode plate; and a lower cutting unit having a lower cutter configured to be installed below the upper cutting unit with the electrode plate interposed therebetween, wherein the lower cutter is configured to cut the electrode plate through cross movement with the upper cutter, and a lower stripper positioned at a side portion of the lower cutter, wherein the lower stripper is configured to support the electrode plate upwardly toward the upper cutter when cutting the electrode plate.
The electrode plate cutting machine as claimed in claim 1, wherein the upper cutting unit further comprises a support body configured to fix the upper cutter, and an elastic supporter provided on the support body, the elastic supporter configured to elastically support the upper stripper downwardly.
The electrode plate cutting machine as claimed in claim 1 or 2, wherein the lower cutting unit further comprises a support body configured to support the lower cutter, and an elastic supporter installed on the support body of the lower cutting unit, the elastic supporter of the lower cutting unit configured to elastically support the lower stripper upwardly.
The electrode plate cutting machine as claimed in claim 3, wherein a stripper guide is installed on the support body of the lower cutting unit, the stripper guide configured to support the lower stripper so as to prevent the lower stripper from moving laterally when cutting the electrode plate.
The electrode plate cutting machine as claimed in claim 3 or 4, wherein the lower cutter is insertion-coupled to the support body of the lower cutting unit.
The electrode plate cutting machine as claimed in any preceding claim, wherein a horizontal surface portion is formed on an upper surface of the lower cutter, wherein the horizontal surface portion is configured to be in surface contact with the electrode plate when cutting the electrode plate.
The electrode plate cutting machine as claimed in any preceding claim, wherein the lower cutter comprises a lower cutter body, and a blade tip coupled to the lower cutter body so as to apply a shear force to the electrode plate.
The electrode plate cutting machine as claimed in any preceding claim, wherein a friction plate is mounted on an upper surface of the lower stripper, wherein the friction plate is configured to be in contact with a lower surface of the electrode plate.
The electrode plate cutting machine as claimed in any one of claims 2 to 8, wherein a stripper guide for supporting the upper stripper is provided on the support body of the upper cutting unit, wherein the stripper guide for supporting the upper stripper is configured to prevent the upper stripper from moving laterally when cutting the electrode plate.
The electrode plate cutting machine as claimed in any preceding claim, wherein a friction plate is mounted on a lower surface of the upper stripper, and wherein the friction plate mounted on the lower surface of the upper stripper is configured to be in contact with the electrode plate.
A secondary battery manufacturing apparatus comprising: a plurality of transport rollers configured to transport an electrode plate, which is a processing target, along a transport path; a winding roll configured to wind the electrode plate that has passed the transport roller; a motor configured to rotate the winding roll; the electrode plate cutting machine according to any preceding claim; and a driving unit configured to move the upper cutting unit upwardly and downwardly.

Description

FIELD The present disclosure relates to an electrode plate cutting machine for cutting an electrode plate during a process of manufacturing a secondary battery and a secondary battery manufacturing apparatus having the electrode plate cutting machine. BACKGROUND Secondary batteries are batteries that can be charged and discharged, unlike primary batteries that cannot be recharged. In general, a secondary battery includes an electrode assembly composed of positive and negative electrode plates (hereinafter referred to as "electrode plates") and a separator. The electrode plate may be manufactured through coating, rolling, slitting, and notching processes. An electrode plate cutting machine may be used during a process of manufacturing an electrode plate. The electrode plate cutting machine includes upper and lower cutters installed on upper and lower portions of the electrode plate, respectively, which is transported along a transport path. The upper and lower cutters cut the electrode plate positioned between the upper and lower cutters through cross movement. However, the conventional electrode plate cutting machine has a problem that an electrode plate moves slightly when cutting the electrode plate. In addition, the movement of the electrode plate causes deintercalation of an active material from an electrode plate substrate while the electrode plate is cut. Accordingly, the conventional electrode plate cutting machine additionally requires a suction device, a foreign substance collecting process, or the like for removing foreign substances. 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 a secondary battery and a secondary battery manufacturing apparatus having the electrode plate cutting machine, in which deintercalation of an active material from a substrate is prevented while cutting by suppressing movement of an electrode plate while the electrode plate is cut. According to an aspect of the present disclosure, there is provided an electrode plate cutting machine for a secondary battery, which includes an upper cutting unit having an upper cutter installed above a transport path of an electrode plate transported along the transport path, and an upper stripper disposed at a side portion of the upper cutter to press the electrode plate downwardly and support the electrode plate when cutting the electrode plate, and a lower cutting unit having a lower cutter installed below the upper cutting unit with the electrode plate interposed therebetween to cut the electrode plate through cross movement with the upper cutter, and a lower stripper positioned at a side portion of the lower cutter to support the electrode plate upwardly toward the upper cutter when cutting the electrode plate. The upper cutting unit may further comprise a support body configured to fix the upper cutter, and may comprise an elastic supporter provided on the support body, the elastic supporter configured to elastically support the upper stripper downwardly. The lower cutting unit may further comprise a support body configured to support the lower cutter, and may comprise an elastic supporter disposed on the support body of the lower cutting unit, the elastic supporter of the lower cutting unit configured to elastically support the lower stripper upwardly. A stripper guide may be installed on the support body of the lower cutting unit, the stripper guide configured to support the lower stripper so as to prevent the lower stripper from moving laterally when cutting the electrode plate. The lower cutter may be insertion-coupled to the support body of the lower cutting unit and may be replaceable. A horizontal surface portion may be formed on an upper surface of the lower cutter, and the horizontal surface portion may be configured to be in surface contact with the electrode plate when cutting the electrode plate. The lower cutter may comprise a lower cutter body, and a blade tip coupled to the lower cutter body so as to apply a shear force to the electrode plate. A friction plate may be mounted on an upper surface of the lower stripper, and the friction plate may be configured to be in contact with a lower surface of the electrode plate. A stripper guide for supporting the upper stripper may be provided on the support body of the upper cutting unit, and the stripper guide for supporting the upper stripper may be configured to prevent the upper stripper from moving laterally when cutting the electrode plate. A friction plate may be mounted on a lower surface of the upper stripper, and the friction plate mounted on the lower surface of the upper stripper may be configured to be in contact with the electrode plate. According to another aspect of the present disclos