Apparatus for Winding a Sheet for Manufacturing a Secondary Battery

Patent metadata

Field	Value
Publication number	US-2026100401-A1
Application number	US-202319112706-A
Country	US
Kind code	A1
Filing date	Oct 25, 2023
Priority date	Oct 31, 2022
Publication date	Apr 9, 2026
Grant date	—

Abstract

An apparatus for winding a sheet for manufacturing a secondary battery includes at least two bobbins and a sensor. The at least two bobbins include a traveling bobbin on which a winding process proceeds and a standby bobbin that is in a standby state during the winding process; The sensor is disposed apart from the standby bobbin by a predetermined distance, and identifies the position where the sheet wound onto the traveling bobbin will be automatically attached to the standby bobbin. When the winding process on the traveling bobbin is completed, the sheet that was wound by the traveling bobbin is attached to the outer peripheral surface of the standby bobbin, and subsequently the winding process is performed.

First claim

1 . An apparatus for winding a sheet for manufacturing a secondary battery, the apparatus comprising:
a plurality of bobbins including a traveling bobbin and a standby bobbin, wherein the traveling bobbin is configured to accommodate the sheet in a first winding process an the standby bobbin is in a standby state during the first winding process; and a sensor spaced away from the standby bobbin by a predetermined distance, wherein the sensor is configured to identify a position of the standby bobbin to be coupled to the sheet automatically, wherein when the first winding process is completed, the sheet is configured to be attached to an outer peripheral surface of the standby bobbin.

2 . The apparatus according to claim 1 , wherein:
the sheet is any one of a positive electrode sheet, a negative electrode sheet, or a separator sheet of the secondary battery.

3 . The apparatus according to claim 1 , wherein:
the standby bobbin includes a mark, wherein the sensor is configured to detect the mark, and identify the position of the standby bobbin to be coupled to the sheet.

4 . The apparatus according to claim 1 , wherein:
the standby bobbin includes an adhesive member disposed on the outer peripheral surface of the standby bobbin, and wherein the adhesive member is configured to be coupled to the sheet.

5 . The apparatus a according to claim 1 , further comprising:
a turret configured to support and rotate the traveling bobbin and the standby bobbin, wherein, the turret is configured to winding the sheet on the traveling bobbin during the first winding process and, wherein the turret is configured to wind the sheet on the standby bobbin during a second winding process.

6 . The apparatus according to claim 1 , further comprising:
a cutting member; and a pressure member, wherein the sheet is configured to pass between the standby bobbin and the pressure member and be wound onto the traveling bobbin during the first winding process, wherein the cutting member is configured to cut the sheet after the sheet is wound onto the traveling bobbin in the first winding process, wherein the pressure member is configured to couple the sheet to the outer peripheral surface of the standby bobbin after the sheet is cut by the cutting member, and wherein the sheet is configured to be wound on the standby bobbin in a second winding process.

7 . The apparatus according to claim 1 , wherein:
the sensor is configured to detect a mark on the standby bobbin after the sheet is wound on the traveling bobbin.

8 . The apparatus according to claim 1 , wherein:
the sensor is configured to detect a mark on the standby bobbin as the sheet is wound on the traveling bobbin during the first winding process.

9 . The apparatus according to claim 1 , further comprising:
a pressure member configured to couple the sheet to the outer peripheral surface of the standby bobbin after the sheet is wound on the traveling bobbin in the first winding process.

10 . The apparatus according to claim 1 , wherein:
the standby bobbin includes a mark having a color that is different from a color of the outer peripheral surface of the standby bobbin, and the sensor is a laser light sensor or a color sensor.

11 . The apparatus according to claim 4 , wherein:
the adhesive member has a band shape and extends along a longitudinal direction of the standby bobbin, and the adhesive member is located in contact with a mark.

12 . The apparatus according to claim 4 , further comprising:
a film member surrounding the outer peripheral surface of the standby bobbin, wherein the adhesive member is disposed on the film member.

13 . (canceled)

14 . The apparatus according to claim 12 , wherein:
the standby bobbin includes a mark being a finishing tape configured to secures an end position of the film member.

15 . The apparatus according to claim 1 , further comprising:
a pressure member, wherein the pressure member is a nip roller that is reciprocally movable with respect to the standby bobbin.

16 . The apparatus according to claim 1 , further comprising:
a guide member configured to change or guide a moving direction of the sheet.

17 . The apparatus according to claim 16 , wherein:
the guide member comprises a first guide member disposed along a movement path of the sheet between the traveling bobbin and the standby bobbin, wherein the first guide member is configured to maintain a tension of the sheet between the traveling bobbin and the first guide member, and wherein the first guide member is configured to maintain a tension between the first guide member and the standby bobbin.

18 . The apparatus according to claim 17 , wherein:
the first guide member is a guide roller.

19 . The apparatus according to claim 16 , wherein:
the first guide member comprises a dancer roller.

20 . The apparatus according to claim 1 , wherein:
the standby bobbin includes a mark, wherein the mark is a line extending along a longitudinal direction of the standby bobbin, or a plurality of lines or dots extending along the longitudinal direction.

21 . The apparatus according to claim 4 , wherein:
the adhesive member has a band shape and extends along a longitudinal direction of the standby bobbin, and the adhesive member is spaced apart from a mark of the standby bobbin by a predetermined distance.

Assignees

• Lg Energy Solution Ltd

Inventors

• Choi Inchan
• Park Chan Min

Classifications

• H01M10/0468

  Compression means for stacks of electrodes and separators · CPC title

• H01M10/0587

  of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/04

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title