CN-121988803-A - Apparatus for manufacturing secondary battery and electrode plate cutting unit

Abstract

The present disclosure provides an apparatus and an electrode plate cutting unit for manufacturing a secondary battery, which are capable of extending an operating life by two or more times, reducing process costs, improving productivity, maintaining constant cutting performance, and are very useful in processes requiring high quality cutting operations. The apparatus includes a conveying part configured to move the electrode plate, a winding part configured to wind the electrode plate conveyed by the conveying part, an upper cutter mounted above the conveying path to allow a mounting direction to be changed and having an upper cutter blade formed thereon, a stripper positioned below the conveying path of the electrode plate and configured to support the electrode plate when the electrode plate is cut, a fixing body configured to elastically support the stripper, and a lower cutter supported on a side portion of the fixing body and having a lower cutter blade formed thereon, wherein at least one of the upper cutter blade and the lower cutter blade includes two or more blades.

Inventors

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

Assignees

• 三星SDI株式会社

Dates

Publication Date

20260508

Application Date

20250715

Priority Date

20241106

Claims (20)

1. 1. An apparatus for manufacturing a secondary battery, comprising: A conveying section configured to move an electrode plate to be cut along a conveying path; a winding portion configured to wind the electrode plate conveyed by the conveying portion; An upper cutter installed above the transfer path to allow a direction of installation to be changed, and having an upper cutter blade formed thereon; a stripper located below the conveying path of the electrode plate and configured to support the electrode plate when the electrode plate is cut; a fixing body configured to elastically support the stripper, and A lower cutter supported on a side portion of the fixed body below the conveying path and having a lower cutter blade formed thereon, Wherein at least one of the upper cutter blade and the lower cutter blade comprises two or more blades.
2. 2. The apparatus of claim 1, wherein the lower cutter is detachably mounted on the fixed body to allow a mounting direction to be changed so as to selectively use one of a plurality of blades.
3. 3. The apparatus of claim 2, wherein the lower cutter blade comprises: A first blade configured to cut the electrode plate by a cross motion with the upper cutter, and A second blade spaced from the first blade and configured to remain in standby when the first blade is in use.
4. 4. A device according to claim 3, wherein: the lower cutter has a plate shape, and The first blade and the second blade are positioned parallel to each other at an upper end portion of the lower cutter when the lower cutter is mounted on the fixed body.
5. 5. The apparatus of claim 3, wherein the lower cutter blade further comprises a third blade and a fourth blade, the third blade and the fourth blade being parallel to the first blade and the second blade, respectively, and configured to remain in standby when the first blade is in use.
6. 6. The apparatus of claim 5, wherein the lower cutter has a plate shape, the first and second blades are located at an upper end portion of the lower cutter, and the third and fourth blades are located at a lower end portion of the lower cutter when the lower cutter is mounted on the fixed body.
7. 7. The apparatus of claim 1, wherein the upper cutter blade comprises: A first blade configured to apply a shearing force to the electrode plate by a cross motion with the lower cutter when descending, and A second blade parallel to and spaced apart from the first blade and configured to remain in standby when the first blade is in use.
8. 8. The apparatus of claim 7, wherein: the first blade is formed at a front end portion of a surface of the upper cutter facing the electrode plate in a conveying direction of the electrode plate, and The second blade is formed at a side opposite to the first blade and is in contact with the electrode plate simultaneously with the first blade.
9. 9. The apparatus of claim 7, wherein the second blade is formed at a location spaced apart from the electrode plate when the first blade is in contact with the electrode plate.
10. 10. The apparatus of claim 7, wherein the upper cutter blade further comprises a third blade and a fourth blade, the third blade and the fourth blade being parallel to the first blade and the second blade, respectively, and configured to remain in standby when the first blade is in use.
11. 11. An electrode plate cutting unit comprising: An upper cutter installed above the conveying path of the electrode plate conveyed along the conveying path to allow a mounting direction to be changed, and having an upper cutter blade formed thereon; a stripper located below the conveying path of the electrode plate and configured to support the electrode plate when the electrode plate is cut; a fixing body configured to elastically support the stripper, and A lower cutter supported on a side portion of the fixed body below the conveying path and having a lower cutter blade formed thereon, Wherein at least one of the upper cutter blade and the lower cutter blade comprises two or more blades.
12. 12. The electrode plate cutting unit according to claim 11, wherein the lower cutter is detachably mounted on the fixed body to allow a mounting direction to be changed so as to selectively use one of a plurality of blades.
13. 13. The electrode plate cutting unit of claim 12, wherein the lower cutter blade comprises: A first blade configured to cut the electrode plate by a cross motion with the upper cutter, and A second blade spaced from the first blade and configured to remain in standby when the first blade is in use.
14. 14. The electrode plate cutting unit according to claim 13, wherein: the lower cutter has a plate shape, and The first blade and the second blade are positioned parallel to each other at an upper end portion of the lower cutter when the lower cutter is mounted on the fixed body.
15. 15. The electrode plate cutting unit of claim 13, wherein the lower cutter blade further comprises a third blade and a fourth blade, the third blade and the fourth blade being parallel to the first blade and the second blade, respectively, and configured to remain in standby when the first blade is in use.
16. 16. The electrode plate cutting unit according to claim 15, wherein the lower cutter has a plate shape, the first and second blades are located at an upper end portion of the lower cutter, and the third and fourth blades are located at a lower end portion of the lower cutter when the lower cutter is mounted on the fixed body.
17. 17. The electrode plate cutting unit of claim 11, wherein the upper cutter blade comprises: A first blade configured to apply a shearing force to the electrode plate by a cross motion with the lower cutter when the lower cutter is lowered, and A second blade parallel to and spaced apart from the first blade and configured to remain in standby when the first blade is in use.
18. 18. The electrode plate cutting unit according to claim 17, wherein the first blade is formed at a front end portion of a surface of the upper cutter facing the electrode plate in a conveying direction of the electrode plate, and The second blade is formed at a side opposite to the first blade and is in contact with the electrode plate simultaneously with the first blade.
19. 19. The electrode plate cutting unit according to claim 17, wherein the second blade is formed at a position spaced apart from the electrode plate when the first blade is in contact with the electrode plate.
20. 20. The electrode plate cutting unit of claim 17, the upper cutter blade further comprising a third blade and a fourth blade parallel to the first blade and the second blade, respectively, and configured to remain in standby when the first blade is in use.

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 secondary batteries and an electrode plate cutting unit for manufacturing secondary batteries. Background Unlike primary batteries, which are not designed to be charged, secondary batteries are designed to be discharged and recharged. The secondary battery may broadly 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 from an uncoated portion of each electrode plate of the electrode assembly, an external terminal connected to the substrate tab, and the like. Types of electrode assemblies accommodated in the case include stacked electrode assemblies and electrode core electrode assemblies. The electrode core type electrode assembly is manufactured by winding a continuously supplied electrode plate using a winding device. The winding device comprises an electrode plate cutter. The electrode plate cutter is a device for cutting the electrode plates at designed length intervals, and includes an upper cutter and a lower cutter. The upper cutter is installed above the conveying path of the electrode plates, the lower cutter is installed below the conveying path, and the upper cutter and the lower cutter cut the electrode plates by a cross motion with respect to each other. However, since the blade of the conventional upper or lower cutter is formed only at one place, when the blade is worn out, the entire upper or lower cutter should be discarded and replaced with a new cutter. This causes a problem of increased costs for replacing the upper and lower blades of the electrode plate cutter. The information disclosed in this background section is for enhancement of understanding of the background of the disclosure and, therefore, it may contain information that does not form a related (or prior) art. Disclosure of Invention The present disclosure is directed to an improved electrode plate cutting unit and an apparatus for manufacturing a secondary battery using the same. According to an aspect of the present disclosure, there is provided an apparatus for manufacturing a secondary battery, the apparatus including a conveying part configured to move an electrode plate to be cut along a conveying path, a winding part configured to wind the electrode plate conveyed by the conveying part, an upper cutter mounted above the conveying path to allow a mounting direction to be changed and having an upper cutter blade formed thereon, a stripper positioned below the conveying path of the electrode plate and configured to support the electrode plate when the electrode plate is cut, a fixing body configured to elastically support the stripper, and a lower cutter supported on a side portion of the fixing body below the conveying path and having a lower cutter blade formed thereon, wherein at least one of the upper cutter blade and the lower cutter blade includes two or more blades. According to another aspect of the present disclosure, there is provided an electrode plate cutting unit including an upper cutter installed above a conveying path of an electrode plate conveyed along the conveying path to allow a mounting direction to be changed and having an upper cutter blade formed thereon, a stripper positioned below the conveying path of the electrode plate and configured to support the electrode plate when the electrode plate is cut, a fixing body configured to elastically support the stripper, and a lower cutter supported on a side portion of the fixing body below the conveying path and having a lower cutter blade formed thereon, wherein at least one of the upper cutter blade and the lower cutter blade includes two or more blades. 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 The following figures, which are attached to the present specification, illustrate embodiments of the present disclosure and, together with the detailed description of the disclosure, further describe aspects and features of the disclosure. Accordingly, the present disclosure should not be construed as limited to the accompanying drawings, in which: fig. 1 is a schematic view illustrating an electrode assembly of a secondary battery that may be manufactured using 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 battery to which the electrode assembly of fig. 1 is applied; fig. 3 is a sectional view illustrating a cylindrical battery that may be man