Battery Cell and Battery Module Including the Same

Patent metadata

Field	Value
Publication number	US-2023344043-A1
Application number	US-202218005299-A
Country	US
Kind code	A1
Filing date	Apr 26, 2022
Priority date	Apr 26, 2021
Publication date	Oct 26, 2023
Grant date	—

Abstract

Disclosed is a battery cell including a battery case having an accommodation portion in which an electrode assembly is mounted, and a sealing portion formed by sealing an outer periphery thereof. A gas discharge unit can be inserted into the sealing portion and fused together with the sealing portion. The gas discharge unit including a first layer and a second layer and having a folded structure based on a first border line such that the gas discharge unit is open toward the inside of the battery case and the first layer becomes an outer surface of the gas discharge unit. The first layer and the sealing portion being in contact with each other.

First claim

1 . A battery cell, comprising:
a battery case having an accommodation portion with an electrode assembly is-mounted therein, and a sealing portion around an outer periphery of the battery case; and a gas discharge unit disposed into the sealing portion and fused together with the sealing portion, wherein the gas discharge unit includes a first layer and a second layer, the gas discharge unit defining a folded structure folded about a first border line such that the gas discharge unit is opened to an interior of the battery case, and the first layer defines an outer surface of the gas discharge unit in contact with the sealing portion come.

2 . The battery cell according to claim 1 , wherein the first border line extends along a width direction of the gas discharge unit.

3 . The battery cell according to claim 2 ,
wherein in the gas discharge unit, a first end and a second end located at ends of the first border line are folded toward an inside of the gas discharge unit along second border lines.

4 . The battery cell according to claim 3 ,
wherein the second border lines extend diagonally and intersect the first border line at a common point.

5 . The battery cell according to claim 3 , wherein the first end and the second end are located adjacent to an inner side of the sealing portion.

6 . The battery cell according to claim 5 ,
wherein a third end formed in a center portion of the gas discharge unit is configured to protrude away from the sealing portion.

7 . The battery cell according to claim 6 ,
wherein a fourth end defined by an outer end of the gas discharge unit folded by the second border lines is located on the sealing portion.

8 . The battery cell according to claim 1 , further comprising:
an electrode lead electrically connected to an electrode tab of the electrode assembly, the electrode lead protruding out of the battery case via the sealing portion; and a lead film located at a portion corresponding to a first edge of the sealing portion in at least one of an upper portion and a lower portion of the electrode lead, wherein the gas discharge unit is located at a second edge of the sealing portion, the second edge being different from the first edge.

9 . The battery cell according to claim 1 , wherein the first layer contains at least one of polyolefin-based material, epoxy, and polyvinyl chloride (PVC).

10 . The battery cell according to claim 1 , wherein the second layer contains a fluorine-based material.

11 . The battery cell according to claim 1 , wherein the gas discharge unit further includes a moisture absorption layer located between the first layer and the second layer.

12 . The battery cell according to claim 11 , wherein the moisture absorption layer includes a getter material.

13 . The battery cell according to claim 12 , wherein the getter material includes at least one of calcium oxide (CaO), lithium chloride (LiCl), silica (SiO 2 ), barium oxide (BaO), barium (Ba), and calcium (Ca).

14 . The battery cell according to claim 12 ,
wherein the getter material has a structure of a metal organic framework (MOF).

15 . A battery module, comprising the battery cell according to claim 1 .

Assignees

• Lg Energy Solution Ltd

Inventors

• Lim Hun-Hee
• Kim Sang-Hun
• Kang Min-Hyeong
• Song Dae-Woong
• Yu Hyung-Kyun
• Hwang Soo-Ji

Classifications

• H01M50/141 Primary

  for protecting against humidity · CPC title

• H01M50/394

  Gas-pervious parts or elements · CPC title

• H01M50/124 Primary

  having a layered structure · CPC title

• H01M50/367 Primary

  Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title