Lamination Device and Unit Cell Manufacturing Method

Patent metadata

Field	Value
Publication number	US-2025269634-A1
Application number	US-202318858044-A
Country	US
Kind code	A1
Filing date	Feb 14, 2023
Priority date	Apr 21, 2022
Publication date	Aug 28, 2025
Grant date	—

Abstract

The present invention discloses a lamination device and a unit cell manufacturing method. The lamination device of the present invention includes a vision unit disposed at a downstream side of the final cutter unit and configured to capture an image of the unit cell, and a control unit configured to calculate a brightness value of the captured image received from the vision unit and control the pressure adjusting unit to correct the pressure of the lamination roller unit according to the calculated brightness value.

First claim

1 . A lamination device comprising:
a lamination roller unit configured to laminate a separator sheet and an electrode of an electrode laminate by pressing an upper side and a lower side of the electrode laminate; a pressure adjusting unit connected to the lamination roller unit and configured to adjust a pressure of the lamination roller unit; a final cutter unit disposed at a downstream side of the lamination roller unit and configured to cut the separator sheet and the electrode from the electrode laminate to form a unit cell; a vision unit disposed at a downstream side of the final cutter unit and configured to capture an image of the unit cell; and a control unit configured to calculate a brightness value of the image and configured to control the pressure adjusting unit to correct the pressure of the lamination roller unit according to the brightness value.

2 . The lamination device of claim 1 , wherein the vision unit is disposed adjacent to a lower side of the unit cell.

3 . The lamination device of claim 1 , wherein the control unit is configured to calculate the brightness value corresponding to a portion of the separator in contact with an edge portion of the electrode in the image.

4 . The lamination device of claim 3 , wherein an allowable brightness range for the brightness value is preset in the control unit, and the control unit is configured to control the pressure adjusting unit to correct the pressure of the lamination roller unit when it is determined that the brightness value is outside the allowable brightness range.

5 . The lamination device of claim 4 , wherein the vision unit is configured to capture the image of the unit cell in real time, and the control unit is configured to correct the pressure of the lamination roller unit in real time.

6 . The lamination device of claim 1 , wherein the control unit is configured to correct the pressure of the lamination roller unit based on a largest pressure of pressures at which the lamination roller unit is configured to press the electrode laminate.

7 . The lamination device of claim 1 , wherein the control unit includes:
a vision control unit configured to receive the image; and an automatic control unit configured to calculate the brightness value by analyzing the image and configured to control the pressure adjusting unit to correct the pressure of the lamination roller unit when it is determined that the brightness value is outside of a preset allowable brightness range.

8 . The lamination device of claim 1 , wherein an initial pressure value of the pressure adjusting unit is preset in the control unit.

9 . The lamination device of claim 1 , wherein the lamination roller unit includes an upper lamination roller and a lower lamination roller, the lower lamination roller is disposed adjacent to a lower side of the separator sheet, and the pressure adjusting unit is connected to the upper lamination roller, the pressure adjusting unit being configured to lift and lower the upper lamination roller.

10 . The lamination device of claim 1 , further comprising an alarm unit configured to generate a warning sound when it is determined that the brightness value is outside an allowable brightness range before or after the pressure of the lamination roller unit is corrected.

11 . A method of manufacturing a unit cell, the method comprising:
laminating a separator sheet and an electrode of an electrode laminate by pressing the electrode laminate using a lamination roller unit; cutting the electrode laminate to form the unit cell using a final cutter unit; capturing an image of the unit cell using a vision unit; and calculating a brightness value using a control unit by analyzing the image captured by the vision unit and controlling a pressure adjusting unit to correct a pressure of the lamination roller unit according to the brightness value.

12 . The method of claim 11 , wherein the vision unit captures the image of the unit cell from a position adjacent to a lower side of the unit cell.

13 . The method of claim 11 , wherein the control unit calculates the brightness value corresponding to a portion of the separator in contact with an edge portion of the electrode of the unit cell in the image.

14 . The method of claim 13 , wherein an allowable brightness range for the brightness value is preset in the control unit, and the control unit controls the pressure adjusting unit to correct the pressure of the lamination roller unit when it is determined that the brightness value is outside of the allowable brightness range.

15 . The method of claim 14 , wherein the vision unit captures the image of the unit cell in real time, and the control unit corrects the pressure of the lamination roller unit in real time.

16 . The method of claim 11 , wherein the control unit corrects the pressure of the lamination roller unit based on a largest pressure of pressures at which the lamination roller unit presses the electrode laminate.

17 . The method of claim 11 , wherein an initial pressure value of the pressure adjusting unit is preset in the control unit.

18 . The method of claim 11 , wherein the pressure adjusting unit corrects the pressure by lifting and lowering an upper lamination roller of the lamination roller unit.

19 . The method of claim 11 , further comprising generating a warning sound using an alarm unit when it is determined that the brightness value is outside of an allowable brightness range before or after the pressure of the lamination roller unit is corrected.

Assignees

• Lg Energy Solution Ltd

Inventors

• Cho Kwooman

Classifications

• G01N2021/8825

  Separate detection of dark field and bright field · CPC title

• H01M10/0585

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

• G01N21/8851

  Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges (G01N21/8806 and G01N21/93 - G01N21/95692 take precedence; optical measurement of dimensions G01B11/00; optical scanning G02B26/10; image transformation G06T3/00; computerised image enhancement G06T5/00; image processing per se for flaw detection G06T7/0002) · CPC title

• H01M10/0413

  Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes · CPC title

• H01M10/0436

  Small-sized flat cells or batteries for portable equipment · CPC title