Granted Patent B2

US 12,749,771 · App. 17/913,614 · Granted Sep 29, 2026

Inventors: Kwang Ho Won (Daejeon, KR); Young Hoon Kim (Daejeon, KR); Ki Tae Kim (Daejeon, KR); Chan Ki Park (Daejeon, KR); Jung Shik Oh (Daejeon, KR); Hyun Tae Kim (Daejeon, KR)

Assignee: LG Energy Solution, Ltd.

H01M50/474H01M50/105H01M50/538H01M10/045H01M50/136H01M50/178H01M50/531H01M50/586

Abstract

Claims (16)

1 . A pouch-shaped battery cell having an electrode assembly received in a pouch-shaped battery case, wherein

the electrode assembly comprises positive electrodes and negative electrodes, each of the positive electrodes and the negative electrodes having a structure in which a length of the electrode in an overall width direction is less than a length of the electrode in an overall length direction,

each of the positive electrodes and the negative electrodes has an uncoated portion, which is a portion not coated with an electrode mixture, extending parallel to outer peripheries of the electrode in the overall width direction or outer peripheries of the electrode in the overall length direction and a coated portion, which is coated with the electrode mixture, disposed at a remaining portion of the electrode excluding the uncoated portion, and

a stepped structure is formed at a part of the pouch-shaped battery case adjacent to the uncoated portion, the stepped structure being recessed inwards from adjacent portions of the pouch-shaped battery case,

wherein each of the positive electrodes and the negative electrodes has a first coated portion and a second coated portion disposed at opposite sides of the uncoated portion, and each of the positive electrodes and the negative electrodes is folded at a respective one of the uncoated portions,

wherein each of the positive electrodes and the negative electrodes has a respective insulating member overlying outer surfaces of a part of a respective one of the uncoated portions and a portion of each respective coated portion, each insulating member serving as a border portion extending between the respective uncoated portion and the respective coated portion, and

wherein the insulating members are only located adjacent to locations at which the positive electrodes and the negative electrodes are folded.

2 . The pouch-shaped battery cell according to claim 1 , wherein positive electrode tabs and negative electrode tabs protrude from an outer periphery of the electrode assembly in the overall width direction.

3 . The pouch-shaped battery cell according to claim 1 , wherein a positive electrode tab or a negative electrode tab protrudes from one of the first coated portion or the second coated portion of each of the electrodes.

4 . The pouch-shaped battery cell according to claim 1 , wherein each insulating member is an insulation tape or an insulating solution.

5 . The pouch-shaped battery cell according to claim 1 , wherein a wrinkled folding line extends along each uncoated portion.

6 . The pouch-shaped battery cell according to claim 1 , wherein the pouch-shaped battery case comprises a first battery case and a second battery case, and

wherein the stepped structure is formed at a portion of at least one of the first battery case and the second battery case.

7 . The pouch-shaped battery cell according to claim 6 , wherein a respective stepped structure of the first battery case and the second battery case is attached to each of an uppermost electrode and a lowermost electrode of the electrode assembly.

8 . The pouch-shaped battery cell according to claim 1 , wherein the pouch-shaped battery case and the electrode assembly are folded, and

wherein a notch is formed in a sealed portion located at a portion of the pouch-shaped battery case that is folded.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (26)