Secondary battery and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-2017133707-A1
Application number	US-201615298974-A
Country	US
Kind code	A1
Filing date	Oct 20, 2016
Priority date	Nov 9, 2015
Publication date	May 11, 2017
Grant date	—

Abstract

Provided is a secondary battery. The secondary battery includes a pouch case provided with an accommodation part accommodating an electrode assembly and a gas pocket part collecting a gas generated in the accommodation part by the electrode assembly; and a clamp device coupled between the accommodation part and the gas pocket part to seal a gap between the accommodation part and the gas pocket part.

First claim

What is claimed is:

1 . A secondary battery comprising:
a pouch case provided with an accommodation part accommodating an electrode assembly and a gas pocket part collecting a gas generated in the accommodation part by the electrode assembly; and a clamp device coupled between the accommodation part and the gas pocket part to seal a gap between the accommodation part and the gas pocket part.

2 . The secondary battery of claim 1 , wherein the clamp device comprises a female member and a male member, which are respectively disposed on top and bottom surfaces between the accommodation part and the gas pocket part and coupled to each other to press the accommodation part and the gas pocket part and seal the gap between the accommodation part and the gas pocket part.

3 . The secondary battery of claim 2 , wherein the female member has a rounded shape with a C-shaped cross-section, and
the male member has a circular cross-section that is inserted into the female member.

4 . The secondary battery of claim 3 , wherein the female member has elasticity so that the male member is press-fitted to be surrounded by the female member.

5 . The secondary battery of claim 1 , wherein the clamp device has a length greater than that of the pouch case in a width direction.

6 . The secondary battery of claim 1 , wherein a sealing part for sealing the gap between the accommodation part and the gas pocket part is disposed between the accommodation part and the gas pocket part, and
the clamp device is coupled to the sealing part.

7 . The secondary battery of claim 1 , wherein, after the clamp device is coupled between the accommodation part and the gas pocket part, the gas pocket part connected to the clamp device is cut and removed in a state in which a clearance surface remains.

8 . The secondary battery of claim 7 , wherein the clearance surface has a length ranging from about 10.0 mm to about 50.0 mm.

9 . The secondary battery of claim 7 , wherein the clearance surface remaining on the clamp device is coupled to a surface of the accommodation part.

10 . A method for manufacturing a secondary battery, the method comprising:
a preparing step (S 10 ) of preparing a pouch case provided with n accommodation part in which an electrode assembly is accommodated and a gas pocket part collecting a gas generated in the accommodation part 121 by the electrode assembly; and a sealing step (S 30 ) of coupling a clamp device between the accommodation part and the gas pocket part to seal a gap between the accommodation part and the gas pocket part.

11 . The method of claim 10 , wherein, in the sealing step (S 30 ), the clamp device comprises a female member and a male member, which are respectively disposed on top and bottom surfaces between the accommodation part and the gas pocket part and coupled to each other to press the accommodation part and the gas pocket part and seal the gap between the accommodation part and the gas pocket part.

12 . The method of claim 10 , further comprising, after the sealing step (S 30 ), a removing step (S 40 ) of cutting and removing the gas pocket part connected to the clamp device in a state in which a clearance surface remains.

13 . The method of claim 12 , wherein the clearance surface has a length ranging from about 10.0 mm to about 50.0 mm.

14 . The method of claim 12 , further comprising, after the removing step (S 40 ), a coupling step (S 50 ) of coupling the clearance surface to a surface of the accommodation part.

15 . The method of claim 10 , further comprising a sealing step (S 20 ) of sealing the gap between the accommodation part and the gas pocket part between the preparing step (S 10 ) and the sealing step (S 30 ).

Assignees

• Lg Chemical Ltd

Inventors

• Han Hyung Seok
• Jung Sang Suk
• Yu Hyung Kyun
• Paeng Ki Hoon
• Lee Ji Hoon
• Hwang Soo Ji
• Kang Min Hyeong

Classifications

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M10/0436 Primary

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

• H01M10/05 Primary

  Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) · CPC title

• H01M2/08

  Electricity · mapped topic

• H01M2/30

  Electricity · mapped topic