Pouch secondary battery and method of fabricating the same

Patent metadata

Field	Value
Publication number	US-11276893-B2
Application number	US-201916444887-A
Country	US
Kind code	B2
Filing date	Jun 18, 2019
Priority date	Dec 20, 2016
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A pouch secondary battery is disclosed. One aspect of the present invention provides a pouch secondary battery including a casing configured to accommodate an electrode assembly from which electrode tabs are led; and the casing includes a sealing portion formed on three sides of four sides of the pouch secondary battery and a close contact portion formed on the remaining one side; and an extending portion protruding perpendicularly with respect to the close contact portion is formed in a portion adjacent to the close contact portion in the sealing portion.

First claim

What is claimed is:

1. A pouch type secondary battery comprising:
a pouch type casing configured to accommodate an electrode assembly from which electrode tabs protrude,
wherein a sealing portion formed on three of four sides of the pouch type secondary battery and a non-sealing portion formed on one remaining side are formed by the casing, and
wherein the non-sealing portion includes:
a rounded concave portion formed to be concave toward the electrode assembly after the pouch type casing is folded to accommodate the electrode assembly, the rounded concave portion extending in a longitudinal direction of the non-sealing portion.

2. The pouch type secondary battery of claim 1 , wherein an extending portion protruding with respect to the non-sealing portion is formed in the sealing portion in a portion adjacent to the non-sealing portion.

3. The pouch type secondary battery of claim 1 ,
wherein a plurality of accommodation spaces configured to accommodate the electrode assembly and a rounded portion having an upwardly convex shape located at a gap between the plurality of accommodation spaces are formed in the casing before the electrode assembly is accommodated in the casing, and the rounded concave portion is at least a part of the rounded portion.

4. The pouch type secondary battery of claim 1 , wherein the pouch type casing includes aluminum or an aluminum alloy.

5. The pouch type secondary battery of claim 1 ,
wherein before the pouch type casing is folded to enclose the electrode assembly the pouch type casing includes first and second accommodating spaces configured to accommodate the electrode assembly and a rounded portion having an upwardly convex shape located between the first and second accommodation spaces, and each of the first and second accommodating spaces has a constant depth along an entirety of its length.

6. A pouch type secondary battery comprising:
a pouch type casing enclosing an electrode assembly to form:
a sealing portion formed on at least one side of the pouch type secondary battery; and,
a non-sealing portion formed on at least one side of the pouch type secondary battery,
wherein the sealing portion includes:
an extending portion of the sealing portion protruding with respect to the non-sealing portion and the extending portion is connected to the non-sealing portion,
wherein the non-sealing portion includes:
a rounded concave portion formed to be concave toward the electrode assembly after the pouch type casing is folded to accommodate the electrode assembly, the rounded concave portion extending in a longitudinal direction of the non-sealing portion.

7. The pouch type secondary battery of claim 6 , wherein a plurality of accommodation spaces having a recessed shape configured to accommodate the electrode assembly and a rounded portion having an upwardly convex shape located at a gap between the plurality of accommodation spaces are formed in the casing before the electrode assembly is accommodated in the casing.

8. The pouch type secondary battery of claim 7 , wherein the casing includes aluminum or an aluminum alloy.

9. The pouch type secondary battery of claim 7 , wherein the rounded portion is formed to protrude convexly in a direction opposite to a recessed direction of the accommodation spaces.

10. The pouch type secondary battery of claim 6 , wherein the extending portion is protruding substantially perpendicularly with respect to the non-sealing portion.

Assignees

• Sk Innovation Co Ltd

Inventors

• Kim Tae Il
• Kim Dong Ju
• Kim Sung Yeop
• Kim Jin Go
• Lee Seung Noh

Classifications

• H01M10/049 Primary

  Processes for forming or storing electrodes in the battery container · CPC title

• H01M50/186 Primary

  characterised by the disposition of the sealing members · CPC title

• H01M50/178

  for pouch or flexible bag cells · CPC title

• H01M50/105 Primary

  Pouches or flexible bags · CPC title

• H01M50/557

  Plate-shaped terminals · CPC title