Battery Cell, and Battery Module and Battery Pack Including the Same

Patent metadata

Field	Value
Publication number	US-2022102818-A1
Application number	US-202117486076-A
Country	US
Kind code	A1
Filing date	Sep 27, 2021
Priority date	Sep 29, 2020
Publication date	Mar 31, 2022
Grant date	—

Abstract

A battery cell includes a casing having an accommodation space formed therein and having one or both ends open; a cover plate covering one or both open ends of the casing; and an electrode assembly accommodated in the accommodation space, in which a plurality of electrode plates are stacked with a separator interposed therebetween. The electrode assembly includes electrode connection portions, respectively extending from the plurality of electrode plates; and a terminal bonded to the electrode connection portion and having a portion exposed outwardly through the cover plate.

First claim

What is claimed is:

1 . A battery cell comprising:
a casing having an accommodation space formed therein and having one or both ends open; a cover plate covering one or both open ends of the casing; an electrode assembly accommodated in the accommodation space, in which a plurality of electrode plates are stacked with a separator interposed therebetween, the electrode assembly comprising electrode connection portions, respectively extending from the plurality of electrode plates; and a terminal bonded to the electrode connection portion and having a portion exposed outwardly through the cover plate.

2 . The battery cell of claim 1 , wherein the terminal comprises a bonding portion, bonded to the electrode connection portion, and a terminal body electrically connected to the bonding portion and exposed outwardly through the cover plate.

3 . The battery cell of claim 2 , wherein the electrode connection portion and the bonding portion are bonded to each other while overlapping each other in a length direction of the casing.

4 . The battery cell of claim 3 , wherein the electrode connection portion and the bonding portion are bonded to each other while an end surface of the electrode connection portion is in contact with the terminal body.

5 . The battery cell of claim 2 , wherein the terminal has an L-shaped, T-shaped, or U-shaped cross-sectional profile.

6 . The battery cell of claim 2 , wherein the terminal has a plurality of bonding portions extend from the terminal body at a predetermined gap,
the plurality of bonding portions are configured to be in contact with both side surfaces of the electrode connection portion, and the electrode connection portion and the plurality of bonding portion are bonded to each other while overlapping each other in a length direction of the casing.

7 . The battery cell of claim 2 , wherein the electrode connection portion and the bonding portion are bonded to each other while overlapping each other, and at least one of the bonding portion and the electrode connection portion is then bent at least once.

8 . The battery cell of claim 1 , wherein the electrode connection portion extends from a center of the electrode assembly, or extends in a position offset from the center of the electrode assembly, based on a thickness direction of the electrode assembly.

9 . The battery cell of claim 1 , wherein the electrode connection portion extends from an external portion of the electrode assembly, in a length direction of the electrode assembly, and the electrode connection portion is bent in a thickness direction of the electrode assembly.

10 . The battery cell of claim 1 , further comprising:
a packaging member surrounding a periphery of the electrode assembly in a length direction, wherein the packaging member comprises a film or a tube formed of a material having at least one of heat shrinkage and insulating properties.

11 . The battery cell of claim 1 , wherein a length of the electrode plate is equal to more than twice to less than 25 times a height of the electrode plate.

12 . The battery cell of claim 2 , wherein the terminal body has a thickness greater than a thickness of the boding portion.

13 . The battery cell of claim 2 , wherein the terminal body has a height greater than or equal to a height of the bonding portion.

14 . The battery cell of claim 1 , wherein both ends of the casing are open,
the cover plate is coupled to each of both open ends of the casing, and the terminal is exposed outwardly through the cover plate on both ends of the casing in a length direction.

15 . The battery cell of claim 14 , wherein the electrode connection portion comprises a plurality of connection portions extending from each of both ends of the electrode plate in a length direction while the plurality of connection portions being spaced apart from each other, and
the terminal comprises a plurality of terminals exposed outwardly through the cover plate from each of both ends of the casing in the length direction.

16 . The battery cell of claim 14 , wherein the electrode connection portion comprises two electrode connection portions, spaced apart from each other on one end of the electrode plate in a length direction, and two electrode connection portions spaced apart from each other on the other end of the electrode plate in the length direction, and
the terminal comprises two terminals, exposed outwardly through the cover plate while being spaced apart from each other on the one end of the casing in the length direction, and two terminals exposed outwardly through the cover plate while being spaced apart from each other on the other end of the casing in the length direction.

17 . The battery cell of claim 16 , wherein the two terminals disposed on each of both ends of the casing in the length direction have different polarities.

18 . The battery cell of claim 1 , wherein a gas discharging member for discharging gas, generated in the accommodation space of the casing, to an external entity is installed on the cover plate.

19 . A battery module comprising:
a module housing having a space formed therein; a plurality of battery cells accommodated in the module housing; and a bus bar connecting terminals of the plurality of battery cells, wherein the battery cell comprises: a casing having an accommodation space formed therein and having one or both ends open; a cover plate covering one or both open ends of the casing; an electrode assembly accommodated in the accommodation space, in which a plurality of electrode plates are stacked with a separator interposed therebetween, the electrode assembly comprising electrode connection portions, respectively extending from the plurality of electrode plates; and a terminal bonded to the electrode connection portion and having a portion exposed outwardly through the cover plate.

20 . A battery pack comprising:
a cell stack assembly in which a plurality of battery cells are stacked, the cell back assembly comprising a bus bar connected to terminals of the plurality of battery cells; and a pack housing having a spaced formed therein such that a plurality of cell stack assemblies are accommodated in the space, wherein the battery cell comprises: a casing having an accommodation space formed therein and having one or both ends open; a cover plate covering one or both open ends of the casing; an electrode assembly accommodated in the accommodation space, in which a plurality of electrode plates are stacked with a separator interposed therebetween, the electrode assembly comprising electrode connection portions, respectively extending from the plurality of electrode plates; and a terminal bonded to the electrode connection portion and having a portion exposed outwardly through the cover plate, and wherein the plurality of cell stack assemblies are accommodated in the pack housing by regarding the cell stack assembly as a unit.

Assignees

• Sk Innovation Co Ltd

Inventors

• Rhee Seo Roh
• Chung Gyu Jin
• Jeong Won Seok
• Jeong Ha Chul
• Choi Yang Kyu

Classifications

• H01M50/548

  on opposite sides of the cell · CPC title

• H01M50/178 Primary

  for pouch or flexible bag cells · CPC title

• H01M50/131

  characterised by physical properties, e.g. gas permeability, size or heat resistance · CPC title

• H01M50/211

  adapted for pouch cells · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title