Apparatus and method for notching electrode sheet

Patent metadata

Field	Value
Publication number	US-11839993-B2
Application number	US-202217695319-A
Country	US
Kind code	B2
Filing date	Mar 15, 2022
Priority date	Mar 7, 2018
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

Discussed is an apparatus for notching an electrode sheet, the apparatus including a transfer unit having first and second transfer rollers provided on a bottom surface of the electrode sheet to transfer the electrode sheet at regular intervals, a jig unit provided below the electrode sheet, and supporting the bottom surface of the non-coating portion and a notching unit provided above the electrode sheet to notch the non-coating portion supported on the jig unit to provide the electrode tab, wherein the jig unit includes a rotation member provided between the first and second transfer rollers and rotated in a direction perpendicular to a transfer direction of the electrode sheet, two or more jigs provided on an outer circumferential surface of the rotation member to alternately support the non-coating portion disposed between the first and second transfer rollers when the rotation member is rotated.

First claim

What is claimed is:

1. An apparatus for notching an electrode sheet, which continuously notches a non-coating portion of the electrode sheet so as to be processed as an electrode tab, the apparatus comprising:
a transfer unit comprising first and second transfer rollers provided on a bottom surface of the electrode sheet to transfer the electrode sheet at regular intervals;
a jig unit provided below the electrode sheet, disposed between the first and second transfer rollers, and supporting the bottom surface of the non-coating portion; and
a notching unit provided above the electrode sheet to notch the non-coating portion supported on the jig unit to provide the electrode tab,
wherein the jig unit comprises:
a rotation member provided between the first and second transfer rollers and rotated in a direction perpendicular to a transfer direction of the electrode sheet about an axis parallel to the transfer direction; and
two or more jigs provided on an outer circumferential surface of the rotation member to alternately support the non-coating portion disposed between the first and second transfer rollers when the rotation member is rotated,
wherein the two or more jigs are detachably coupled to a coupling part provided on an outer circumferential surface of the rotation member,
wherein each of the two or more jigs comprises a coupling piece detachably coupled to the coupling part and a supporting piece supporting the non-coating portion, and
wherein the coupling piece includes a guide protrusion in a direction of a center of the rotation member, and the supporting piece includes a guide groove to slidably couple to the guide protrusion.

2. The apparatus of claim 1 , wherein each of the first and second transfer rollers is disposed to be spaced by a length from each of the two or more jigs supporting the non-coating portion formed on the electrode sheet.

3. The apparatus of claim 2 , wherein the length ranges from approximately 30 mm to 100 mm.

4. The apparatus of claim 1 , wherein the rotation member is rotated as the first and second transfer rollers are rotated to circulate the two or more jigs, and is to be interlocked when disposed one at a time on the non-coating portion between the first and second transfer rollers.

5. The apparatus of claim 1 , wherein the supporting piece is movably coupled to the coupling piece in the direction of the center of the rotation member or vice versa so that a length of each jig is adjusted.

6. The apparatus of claim 5 , wherein each of the two or more jigs further comprises a fixing piece fixing the supporting piece to the coupling piece.

7. The apparatus of claim 1 , further comprising an elevation unit allowing the jig unit to descend in a direction that is away from the non-coating portion or ascend in a direction towards the non-coating portion.

8. A method for notching an electrode sheet, which continuously notches a non-coating portion formed on the electrode sheet so as to be processed as an electrode tab, the method comprising:
an operation (a) of rotating first and second transfer rollers to transfer the electrode sheet at regular intervals;
an operation (b) of rotating a rotation member of a jig unit in a direction perpendicular to a transfer direction of the electrode sheet about an axis parallel to the transfer direction to allow any one jig of two or more jigs provided on the rotation member to be disposed on a bottom surface of the non-coating portion disposed between the first and second transfer rollers;
an operation (c) of allowing the rotation member to ascend by using an elevation unit so that the jig supports the bottom surface of the non-coating portion;
an operation (d) of notching the non-coating portion supported on the jig by using the notching unit so as to be processed as an electrode tab; and
an operation (e) of allowing the rotation member to descend by using the elevation unit so that the jig is separated from the electrode sheet,
wherein the two or more jigs are detachably coupled to a coupling part provided on an outer circumferential surface of the rotation member,
wherein each of the two or more jigs comprises a coupling piece detachably coupled to the coupling part and a supporting piece supporting the non-coating portion, and
wherein the coupling piece includes a guide protrusion in a direction of a center of the rotation member, and the supporting piece includes a guide groove to slidably couple to the guide protrusion.

9. The method of claim 8 , wherein operations (a) to (e) are repeatedly performed to continuously process the non-coating portion disposed between the first and second rollers so as to be processed as the electrode tab.

10. The method of claim 8 , wherein operations (a) and operation (b) are performed as the same time.

11. An apparatus for continuously notching an electrode sheet at a non-coating portion of the electrode sheet to be processed as an electrode tab, the apparatus comprising:
a first and second transfer rollers provided on a bottom surface of the electrode sheet including the non-coating portion and a coating portion to transfer the electrode sheet at regular intervals;
a jig unit provided below the electrode sheet at a location between the first and second transfer rollers, and periodically supporting the bottom surface of the non-coating portion;
a notching unit provided above the electrode sheet to periodically notch the non-coating portion supported on the jig unit to provide the electrode tab; and
an elevation unit allowing an entirety of the jig unit as a whole to descend in a direction that is away from the non-coating portion or ascend in a direction towards the non-coating portion,
wherein the jig unit comprises:
a rotation member provided between the first and second transfer rollers and rotated about an axis parallel to a transfer direction of the electrode sheet; and
at least one jig provided on an outer circumferential surface of the rotation member to periodically support the non-coating portion at a location between the first and second transfer rollers,
wherein the at least one jig comprises a coupling piece detachably coupled to the coupling part and a supporting piece supporting the non-coating portion, and
wherein the coupling piece includes a guide protrusion in a direction of a center of the rotation member, and the supporting piece includes a guide groove to slidably couple to the guide protrusion.

12. The apparatus of claim 11 , wherein each of the first and second transfer rollers is disposed to be spaced by a length from each of the at least one jig supporting the non-coating portion formed on the electrode sheet.

13. The apparatus of claim 12 , wherein the length ranges from approximately 30 mm to 100 mm.

14. The apparatus of claim 11 , wherein the rotation member is rotated as the first and second transfer rollers are rotated to circulate the at least one jig, and is interlocked when disposed on the non-coating portion between the first and second transfer rollers.

15. The apparatus of claim 11 , wherein the at least one jig is detachably coupled to a coupling part provided on the outer circumferential surface of the rotation member.

16. The apparatus of claim 11 , wherein the supporting piece is movably coupled to the coupling piece in the direction of the center of the rotation member or vice versa.

17. The apparatus of claim 16 , wherein the at least one jig further comprises a fixing piece fixing the supporting piece to the coupling piece.

Assignees

• Lg Energy Solution Ltd

Inventors

• Kwak Dong Hoon
• Eom Hyun Kyu
• Shin Yang Ho

Classifications

• B26F1/12 Primary

  to notch margins of work · CPC title

• B23K26/36

  Removing material (B23K26/55, B23K26/57 take precedence) · CPC title

• B23K26/38

  by boring or cutting · CPC title

• B26D7/015

  for sheet material or piles of sheets (B26D7/018 and B26D7/02 take precedence) · CPC title

• B65H20/02

  by friction roller · CPC title