US-20260128349-A1 - ELECTRODE PLATE CUTTING MACHINE FOR SECONDARY BATTERY AND SECONDARY BATTERY MANUFACTURING APPARATUS HAVING ELECTRODE PLATE CUTTING MACHINE

Abstract

The present disclosure is directed to suppressing movement of an electrode plate when cutting the electrode plate to prevent deintercalation of an active material from a substrate when cutting the electrode plate. The 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

• Junhwan KWON
• Jinhwan Kim
• Jongmin Im
• Bonggeun KANG

Assignees

• SAMSUNG SDI CO., LTD.

Dates

Publication Date

20260507

Application Date

20250718

Priority Date

20241106

Claims (20)

1. 1 . An electrode plate cutting machine for a secondary battery, comprising: 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 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.
2. 2 . The electrode plate cutting machine as claimed in claim 1 , wherein the upper cutting unit further comprises a support body fixing the upper cutter, and an elastic supporter elastically supporting the upper stripper downwardly is provided on the support body.
3. 3 . The electrode plate cutting machine as claimed in claim 1 , wherein the lower cutting unit further comprises a support body supporting the lower cutter, and an elastic supporter elastically supporting the lower stripper upwardly is installed on the support body.
4. 4 . The electrode plate cutting machine as claimed in claim 3 , wherein a stripper guide supporting the lower stripper to prevent the lower stripper from moving laterally when cutting the electrode plate is further installed on the support body.
5. 5 . The electrode plate cutting machine as claimed in claim 3 , wherein the lower cutter is insertion-coupled to the support body and is replaceable.
6. 6 . The electrode plate cutting machine as claimed in claim 1 , wherein a horizontal surface portion to be in surface contact with the electrode plate when cutting the electrode plate is formed on an upper surface of the lower cutter.
7. 7 . The electrode plate cutting machine as claimed in claim 1 , wherein the lower cutter comprises a lower cutter body, and a blade tip coupled to the lower cutter body to apply a shear force to the electrode plate.
8. 8 . The electrode plate cutting machine as claimed in claim 4 , wherein a friction plate to be in contact with a lower surface of the electrode plate is further mounted on an upper surface of the lower stripper.
9. 9 . The electrode plate cutting machine as claimed in claim 2 , wherein a stripper guide supporting the upper stripper to prevent the upper stripper from moving laterally when cutting the electrode plate is provided on the support body.
10. 10 . The electrode plate cutting machine as claimed in claim 9 , wherein a friction plate to be in contact with the electrode plate is further mounted on a lower surface of the upper stripper.
11. 11 . 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; an electrode plate cutting machine comprising an upper cutting unit having an upper cutter installed above the transport path of the 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; and a driving unit configured to move the upper cutting unit upwardly and downwardly.
12. 12 . The secondary battery manufacturing apparatus as claimed in claim 11 , wherein the upper cutting unit further comprises a support body fixing the upper cutter, and an elastic supporter elastically supporting the upper stripper downwardly is provided on the support body.
13. 13 . The secondary battery manufacturing apparatus as claimed in claim 11 , wherein the lower cutting unit further comprises a support body supporting the lower cutter, and an elastic supporter elastically supporting the lower stripper upwardly is installed on the support body.
14. 14 . The secondary battery manufacturing apparatus as claimed in claim 13 , wherein a stripper guide supporting the lower stripper to prevent the lower stripper from moving laterally when cutting the electrode plate is further installed on the support body.
15. 15 . The secondary battery manufacturing apparatus as claimed in claim 13 , wherein the lower cutter is insertion-coupled to the support body and is replaceable.
16. 16 . The secondary battery manufacturing apparatus as claimed in claim 11 , wherein a horizontal surface portion to be in surface contact with the electrode plate when cutting the electrode plate is formed on an upper surface of the lower cutter.
17. 17 . The secondary battery manufacturing apparatus as claimed in claim 11 , wherein the lower cutter comprises a lower cutter body, and a blade tip coupled to the lower cutter body to apply a shear force to the electrode plate.
18. 18 . The secondary battery manufacturing apparatus as claimed in claim 14 , wherein a friction plate to be in contact with a lower surface of the electrode plate is further mounted on an upper surface of the lower stripper.
19. 19 . The secondary battery manufacturing apparatus as claimed in claim 12 , wherein a stripper guide supporting the upper stripper to prevent the upper stripper from moving laterally when cutting the electrode plate is provided on the support body.
20. 20 . The secondary battery manufacturing apparatus as claimed in claim 19 , wherein a friction plate to be in contact with the electrode plate is further mounted on a lower surface of the upper stripper.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This present application claims priority to and the benefit under 35 U.S.C. § 119(a)-(d) of Korean Patent Application No. 10-2024-0156593, filed on Nov. 6, 2024, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference. 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. The reason why the electrode plate moves is that there is no separate support mechanism for supporting the electrode plate while cutting. 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. According to another aspect of the present disclosure, there is provided a secondary battery manufacturing apparatus including 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, an electrode plate cutting machine including an upper cutting unit having an upper cutter installed above the transport path of the 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, and a driving unit configured to move the upper cutting unit upwardly and downwardly. 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