Electrode assembly, fabricating method of the electrode assembly and electrochemical cell containing the electrode assembly

Patent metadata

Field	Value
Publication number	US-9246186-B2
Application number	US-201414175361-A
Country	US
Kind code	B2
Filing date	Feb 7, 2014
Priority date	Jun 28, 2012
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

A fabricating method of a unit structure for accomplishing an electrode assembly formed by a stacking method, and an electrochemical cell including the same are disclosed. The fabricating method of the electrode assembly is characterized with fabricating the unit structure by conducting a first process of laminating and forming a bicell having a first electrode/separator/second electrode/separator/first electrode structure, and conducting a second process of laminating first separator/second electrode/second separator one by one on one of the first electrode among two of the first electrodes.

First claim

What is claimed is:

1. A fabricating method of an electrode assembly comprising a first electrode, a second electrode and a separator, a unit structure of the electrode assembly being manufactured by:
conducting a first process of laminating and forming a bicell having a first electrode/separator/second electrode/separator/first electrode structure; and
conducting a second process of laminating first separator/second electrode/second separator one by one on one of the first electrode among two of the first electrodes,
wherein a temperature applied for the laminating in the second process is lower by 20° C. to 50° C. than a temperature applied for the laminating in the first process.

2. The fabricating method of an electrode assembly of claim 1 , wherein a plurality of the unit structures are stacked.

3. The fabricating method of an electrode assembly of claim 1 , wherein the first process and the second process are conducted as a continuous process.

4. The fabricating method of an electrode assembly of claim 1 , wherein both sides of the first separator are coated with a coating material having adhesiveness, and one side of the second separator making a contact with the second electrode is coated with the coating material having adhesiveness.

5. The fabricating method of an electrode assembly of claim 4 , wherein the coating material is a mixture of inorganic particles and a binder polymer.

6. The fabricating method of an electrode assembly of claim 1 , wherein both sides of the separator included in the bicell are coated with a coating material having adhesiveness.

7. The fabricating method of an electrode assembly of claim 6 , wherein the coating material is a mixture of inorganic particles and a binder polymer.

8. The fabricating method of an electrode assembly of claim 1 , wherein the first electrode and the second electrode are double sided electrodes comprising a coated structure on both sides of a current collector with an active material.

9. The fabricating method of an electrode assembly of claim 1 , wherein a pressure applied for the laminating in the second process is 40% to 60% of a pressure applied for the laminating in the first process.

10. The fabricating method of an electrode assembly of claim 1 , wherein a temperature applied to an upper block and a lower block of a laminator for conducting the second process is different by 10° C. to 30° C.

Assignees

• Lg Chemical Ltd
• Lg Chemical Ltd

Inventors

• Ku Dae Geun
• Kim Hyuk Su
• Huh Jun Woo
• Lee Hyang Mok
• Ahn Chang Bum

Classifications

• B32B2457/10

  Batteries · CPC title

• H01M10/0585 Primary

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

• H01M2/168

  Electricity · mapped topic

• H01M10/0431 Primary

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• B32B37/02 Primary

  characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations · CPC title