Secondary Battery

Patent metadata

Field	Value
Publication number	US-2025219175-A1
Application number	US-202318848573-A
Country	US
Kind code	A1
Filing date	Apr 11, 2023
Priority date	May 2, 2022
Publication date	Jul 3, 2025
Grant date	—

Abstract

Disclosed is a secondary battery, comprising an electrode assembly; an electrode lead attached to the electrode assembly; a case including a receiving portion in which the electrode assembly is received such that a part of the electrode lead is exposed, and a sealing portion configured to seal up the electrode assembly; and a gas adsorption element disposed in the receiving portion, wherein the gas adsorption element includes a gas adsorption film in which a gas adsorption material is dispersed in a polyolefin matrix resin in a predetermined weight range.

First claim

1 . A secondary battery, comprising:
an electrode assembly; an electrolyte solution disposed in the electrode assembly; an electrode lead coupled to the electrode assembly; a case including a receiving portion in which the electrode assembly is received such that a part of the electrode lead is exposed, and a sealing portion configured to seal the electrode assembly; and a gas adsorption element disposed in the receiving portion, wherein the gas adsorption element includes a gas adsorption film in which a gas adsorption material is dispersed in a polyolefin matrix resin, and wherein a weight ratio of the gas adsorption material to the polyolefin matrix resin is 20:80 to 50:50.

2 . (canceled)

3 . The secondary battery according to claim 1 , wherein the gas adsorption film is formed by extruding a mixture in which the gas adsorption material is dispersed in the molten polyolefin matrix resin.

4 . (canceled)

5 . The secondary battery according to claim 1 , wherein the gas adsorption element is adhered to a first side of the electrode assembly, a second side of the electrode assembly opposite the first side, or both the first and second sides of the electrode assembly in a stack direction of the electrode assembly.

6 . The secondary battery according to claim 3 , wherein the adhesion of the gas adsorption element is thermal adhesion by heating of the gas adsorption element.

7 . The secondary battery according to claim 1 , wherein the gas adsorption element is adhered to an inner surface of the receiving portion.

8 . The secondary battery according to claim 5 , wherein the adhesion of the gas adsorption element is thermal adhesion by heating of the gas adsorption element.

9 . The secondary battery according to claim 1 , wherein the gas adsorption element is 50 to 300 μm in thickness.

10 . (canceled)

11 . The secondary battery according to claim 1 , wherein each of the polyolefin matrix resin and the polyolefin resin is, independently, a polyethylene, a polypropylene or a mixture of the polyethylene and the polypropylene.

12 . The secondary battery according to claim 1 , wherein the gas adsorption material comprises at least one of carbon-based materials, ceramic materials, Metal Organic Framework (MOF) or ammonium-based organics.

13 . (canceled)

14 . (canceled)

15 . A secondary battery, comprising:
an electrode assembly; an electrolyte solution disposed in the electrode assembly; an electrode lead coupled to the electrode assembly; a case including a receiving portion in which the electrode assembly is received such that a part of the electrode lead is exposed, and a sealing portion configured to seal the electrode assembly; and a gas adsorption element disposed in the receiving portion, wherein the gas adsorption element includes a gas adsorption film in which a gas adsorption material is dispersed in a polyolefin matrix resin and a polyolefin resin film stacked on each of two surfaces of the gas adsorption film, and wherein a weight ratio of the gas adsorption material to the polyolefin matrix resin included in the gas adsorption film is 20:80 to 60:40.

16 . The secondary battery according to claim 15 , wherein the gas adsorption film is formed by extruding a mixture in which the gas adsorption material is dispersed in the molten polyolefin matrix resin.

17 . The second battery according to claim 15 , wherein the gas adsorption film and the polyolefin resin film stacked on each of the two surfaces of the gas adsorption film are formed by co-extruding a mixture in which the gas adsorption material is dispersed in the molten polyolefin matrix resin and a polyolefin resin melt on two surfaces of the mixture.

18 . The secondary battery according to claim 15 , wherein the gas adsorption element is adhered to a first side of the electrode assembly, a second side of the electrode assembly opposite the first side, or both the first and second sides of the electrode assembly in a stack direction of the electrode assembly.

19 . The secondary battery according to claim 18 , wherein the adhesion of the gas adsorption element is thermal adhesion by heating of the gas adsorption element.

20 . The secondary battery according to claim 15 , wherein the gas adsorption element is adhered to an inner surface of the receiving portion.

21 . The secondary battery according to claim 20 , wherein the adhesion of the gas adsorption element is thermal adhesion by heating of the gas adsorption element.

22 . The secondary battery according to claim 15 , wherein the gas adsorption element is 50 to 300 μm in thickness.

23 . The secondary battery according to claim 15 , wherein a thickness of the polyolefin resin film is 5 to 50 μm based on the thickness of the polyolefin resin film stacked on one surface of the gas adsorption film.

24 . The secondary battery according to claim 15 , wherein each of the polyolefin matrix resin and the polyolefin resin is, independently, a polyethylene, a polypropylene or a mixture of the polyethylene and the polypropylene.

25 . The secondary battery according to claim 15 , wherein the gas adsorption material comprises at least one of carbon-based materials, ceramic materials, Metal Organic Framework (MOF) or ammonium-based organics.

Assignees

• Lg Energy Solution Ltd

Inventors

• Lim Hun-Hee
• Kim Sang-Hun
• Kim Mi-Na
• Yu Hyung-Kyun
• Lee Jae-Ho

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/178

  for pouch or flexible bag cells · CPC title

• H01M10/04 Primary

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title

• H01M10/058

  Construction or manufacture · CPC title

• H01M50/486

  Organic material · CPC title