Apparatus for manufacturing unit cell

Patent metadata

Field	Value
Publication number	US-12266753-B2
Application number	US-202017769278-A
Country	US
Kind code	B2
Filing date	Jul 10, 2020
Priority date	Dec 10, 2019
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

A method of manufacturing a unit cell having a negative electrode, a separator, and a positive electrode are stacked and placed between guide rollers. One of the positive electrode and the negative electrode. The separator is coated with a binder, and the separator is dipped in a solvent to soften a cured binder before the separator is put between the guide rollers. An apparatus for manufacturing a unit cell includes a reservoir in which at least two or more transfer rollers that rotate while the separator passes therethrough are mounted, and a solvent is stored at a predetermined level; and a chamber into which the separator passing through a reservoir is put together with the positive electrode and the negative electrode. Guide rollers are disposed so that the negative electrode and the positive electrode move to both surfaces of the separator, respectively.

First claim

The invention claimed is:

1. An apparatus for manufacturing a unit cell, in which one of a positive electrode and a negative electrode is stacked on a top surface of a first separator that is continuously supplied, and an other of the positive electrode and the negative electrode is stacked on a bottom surface of the first separator to bond the positive electrode and the negative electrode to the first separator, the apparatus comprising:
a reservoir in which at least two transfer rollers that rotate while the first separator passes therethrough are mounted, and a solvent is stored at a predetermined level; and
a chamber into which the first separator passing through the reservoir is put together with the positive electrode and the negative electrode, each electrode cut by a predetermined size, and guide rollers are disposed so that the negative electrode and the positive electrode move to the top surface and the bottom surface of the separator, respectively,
wherein, while the first separator passes through the reservoir, at least a partial region of the first separator is dipped in the solvent within the reservoir.

2. The apparatus of claim 1 , wherein drying of the solvent is performed in the chamber.

3. The apparatus of claim 2 , wherein the reservoir comprises:
a first reservoir through which the first separator inserted between the positive electrode and the negative electrode passes; and
a second reservoir through which a second separator stacked at an outermost layer passes.

4. The apparatus of claim 3 , further comprising:
a connection tube configured to connect one of the first reservoir and the second reservoir to the chamber,
wherein the solvent that is dried in the chamber so as to be removed from the first separator is collected into the first reservoir or the second reservoir through the connection tube.

5. The apparatus of claim 4 , wherein a cooling device for liquefying the solvent is coupled to the connection tube.

6. The apparatus of claim 3 , wherein the first reservoir and the second reservoir are connected to a through-tube, and
a valve is mounted on the through-tube to supply the solvent between the first reservoir and the second reservoir.

7. The apparatus of claim 1 , wherein a protrusion of which a diameter partially increases is disposed along a circumference of at least one transfer roller of the at least two transfer rollers, and
wherein only a region of the first separator which passes over the protrusion is coated with the solvent.

8. The apparatus of claim 7 , wherein the protrusion is provided on each of the at least two transfer rollers, and positions of the protrusions are different from each other for each of the at least two transfer rollers.

9. The apparatus of claim 7 , wherein an outer circumferential surface of at least one transfer roller of the at least two transfer rollers is processed to form an unevenness on at least a partial area thereof.

10. The apparatus of claim 9 , wherein a protrusion is provided on each of the at least two transfer rollers, and
wherein the unevenness provided on the outer circumferential surface of one protrusion and the unevenness provided on the outer circumferential surface of the other protrusion are different from each other.

11. The apparatus of claim 1 , wherein at least one or more transfer rollers of the transfer rollers are adjustable in position mounted on the reservoir.

Assignees

• Lg Energy Solution Ltd

Inventors

• Lee Byeong Kyu
• Jung Su Taek
• Kwon Soon Kwan
• Shin Hyun Kyung
• Kim Won Nyeon
• Choi Seong Won

Classifications

• Y10T29/53135

  Storage cell or battery · CPC title

• H01M10/0585

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

• B05C11/1042

  provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus · CPC title

• B05C11/1039

  Recovery of excess liquid or other fluent material; Controlling means therefor · CPC title

• B05C3/125

  the work being a web, band, strip or the like · CPC title