CN-121988783-A - Electrode plate cutting unit, apparatus and method for manufacturing secondary battery

CN121988783ACN 121988783 ACN121988783 ACN 121988783ACN-121988783-A

Abstract

The present disclosure aims to suppress movement of an electrode plate to prevent falling-off of an active material when cutting the electrode plate, and not to cause damage or deformation of a front end surface by uniform surface contact between a cutter and a tiltable stripper. The electrode plate cutting unit includes a lower cutting unit having a lower cutter installed below a transfer path along which the electrode plate moves and having an inclined blade, and a supporting stripper located at a side portion of the lower cutter to support the electrode plate upward, and an upper cutting unit having an upper cutter configured to move upward and downward in the transfer path to cut the electrode plate by a cross motion with the lower cutter while moving downward, and a tiltable stripper installed at a side portion of the upper cutter and inclined while supporting the electrode plate toward 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 (12)

1. An electrode plate cutting unit for manufacturing a secondary battery, comprising: a lower cutting unit having: a lower cutter installed under a conveying path along which the electrode plates move and having an inclined blade, and A supporting stripper located at a side portion of the lower cutter to upwardly support the electrode plate, and An upper cutting unit having: An upper cutter configured to move upward and downward above the conveying path to cut the electrode plate by a cross motion with the lower cutter when moving downward, and And a tiltable stripper installed at a side portion of the upper cutter and tilting while supporting the electrode plate toward the lower cutter.
2. The electrode plate cutting unit according to claim 1, wherein an inclined surface inclined downward in a width direction of the electrode plate and having the blade at one corner thereof is formed on an upper surface of the lower cutter.
3. The electrode plate cutting unit according to claim 2, wherein the upper cutting unit further comprises: A vertical moving structure configured to receive external power and move upward and downward; A support body fixed to the vertical moving structure, and And a stripper supporter supporting the tiltable stripper on the support body, maintaining the tiltable stripper in a horizontal state in a state in which the support body is moved upward, and tilting the tiltable stripper at the same angle as the tilting angle of the tilting surface by receiving a reaction force from the lower cutter when the support body is moved downward.
4. The electrode plate cutting unit according to claim 3, wherein a balance head extending upward from the tiltable stripper and having a vertically long hole is provided on the tiltable stripper, and The stripper supporter has a rotation shaft member passing through the vertically long hole of the balance head and coupled to the support body.
5. The electrode plate cutting unit according to claim 4, wherein the rotation shaft member comprises a screw passing through the vertically elongated hole and threadedly coupled to the support body.
6. The electrode plate cutting unit according to claim 3 or 4, wherein a horizontal holding portion for holding the tiltable stripper in the horizontal state while the support body is moved upward is formed on the support body.
7. The electrode plate cutting unit according to claim 6, wherein catching portions are formed on both end portions of the tiltable stripper, and The horizontal holding portion has a support bracket fixed to the support main and located at opposite sides of the tiltable stripper interposed therebetween to upwardly support the chucking portion.
8. The electrode plate cutting unit according to claim 7, wherein the support bracket has a seat at a lower portion of the catching portion of the tiltable stripper to support the catching portion.
9. The electrode plate cutting unit according to claim 2, wherein an inclination angle of the inclined surface with respect to a plane including the electrode plate is 0.5 degrees or less.
10. The electrode plate cutting unit according to claim 2, wherein a transfer guide for preventing the electrode plate from moving obliquely is formed on the lower cutter.
11. An apparatus for manufacturing a secondary battery, comprising: An electrode plate conveying unit configured to convey the electrode plates along a conveying path; a winding unit configured to wind the electrode plate conveyed by the electrode plate conveying unit; a cutting unit, which is the electrode plate cutting unit according to any one of claims 1 to 10, and And a vertical movement driving unit configured to move the upper cutting unit upward and downward.
12. A method for manufacturing a secondary battery, comprising: A conveying operation of conveying the electrode plate to be cut along a conveying path; A cutting operation for cutting the electrode plate using a cutting unit including a lower cutter installed below the transfer path along which the electrode plate moves and having an inclined blade, a supporting stripper located at a side portion of the lower cutter to upwardly support the electrode plate, an upper cutter configured to move upwardly and downwardly above the transfer path to cut the electrode plate by a cross motion with the lower cutter while moving downwardly, and an inclined stripper installed at a side portion of the upper cutter and inclined while supporting the electrode plate toward the lower cutter, wherein cutting of the electrode plate is performed while the inclined stripper is inclined to closely contact the electrode plate, and And a winding operation of winding the cut electrode plate.

Description

Electrode plate cutting unit, apparatus and method for manufacturing secondary battery Technical Field The present disclosure relates to an electrode plate cutting unit for manufacturing a secondary battery (or a cutting unit for cutting an electrode plate during a process of manufacturing a secondary battery), an apparatus for manufacturing a secondary battery (or a secondary battery manufacturing apparatus) having the cutting unit, and a method for manufacturing a secondary battery. Background Unlike a primary battery that cannot be recharged, a secondary battery is a battery that can be charged and discharged. In general, a secondary battery includes an electrode assembly including positive and negative electrode plates (hereinafter, referred to as "electrode plates") and a separator. The electrode plate may be manufactured by coating, rolling, slitting and die cutting processes. The electrode plate cutter may be used during a process of manufacturing the electrode plate. The electrode plate cutter includes upper and lower cutters mounted on upper and lower portions of the electrode plate conveyed along the conveying path, respectively. The upper cutter and the lower cutter cut the electrode plate positioned between the upper cutter and the lower cutter by a cross motion. 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 pertinent (or prior art). Disclosure of Invention The present disclosure is directed to providing an electrode plate cutting unit for manufacturing a secondary battery, an apparatus for manufacturing a secondary battery (or secondary battery manufacturing apparatus) having the same, and a method for manufacturing a secondary battery, in which movement of an electrode plate when cutting the electrode plate is suppressed to prevent an active material from falling off from the substrate at the time of cutting, a post-processing process of collecting impurities after cutting is omitted, and damage or deformation of a front end surface is not caused. According to an aspect of the present disclosure, there is provided an electrode plate cutting unit for manufacturing a secondary battery, the electrode plate cutting unit including a lower cutting unit having a lower cutter and a supporting stripper, the lower cutter being mounted under a transfer path along which an electrode plate moves and having an inclined blade, and the supporting stripper being located at a side portion of the lower cutter to support the electrode plate upward, and an upper cutting unit having an upper cutter configured to move upward and downward in the transfer path to cut the electrode plate by a cross motion with the lower cutter while moving downward, and an inclined stripper being mounted at a side portion of the upper cutter and inclined while supporting the electrode plate toward the lower cutter. According to another aspect of the present disclosure, there is provided an apparatus for manufacturing a secondary battery including an electrode plate transfer unit configured to transfer an electrode plate along a transfer path, a winding unit configured to wind the electrode plate transferred by the electrode plate transfer unit, a cutting unit including a lower cutter and an upper cutter, the lower cutter having a lower cutter and a supporting stripper, the lower cutter being installed below the transfer path and having an inclined blade, and the supporting stripper being located at a side portion of the lower cutter to upwardly support the electrode plate, and the upper cutter having an upper cutter and an inclined stripper, the upper cutter being configured to move upwardly and downwardly over the transfer path to cut the electrode plate by a cross motion with the lower cutter when moving downwardly, and the inclined stripper being installed at a side portion of the upper cutter and inclined while supporting the electrode plate toward the lower cutter, and a vertical movement driving unit configured to move the upper cutter upwardly and downwardly. According to still another aspect of the present disclosure, there is provided a method for manufacturing a secondary battery, the method including a conveying operation of conveying an electrode plate to be cut along a conveying path, a cutting operation of cutting the electrode plate using a cutting unit including a lower cutter, a supporting stripper, an upper cutter, and a tiltable stripper, the lower cutter being mounted under the conveying path along which the electrode plate moves and having a sloped blade at a side portion of the lower cutter to upwardly support the electrode plate, the upper cutter being configured to move upwardly and downwardly to cut the electrode plate by a cross motion with the lower cutter while moving downwardly, and the tiltable stripper being mounted at a side portion of the upper cutter