System and method for injecting electrolyte of pouch type battery

Patent metadata

Field	Value
Publication number	US-2018175364-A1
Application number	US-201715804269-A
Country	US
Kind code	A1
Filing date	Nov 6, 2017
Priority date	Dec 20, 2016
Publication date	Jun 21, 2018
Grant date	—

Abstract

A method for injecting an electrolyte of a pouch type battery is provided. The method includes pressing the pouch type battery that has a gas pocket on a first side thereof to move gas generated from the battery toward the gas pocket. The gas pocket is then pierced using a needle type injector and an electrolyte is injected through the pierced portion. The electrolyte injected into the gas pocket is moved toward a second side of the battery and the gas pocket is pierced to remove the gas under a vacuum and seal the battery.

First claim

What is claimed is:

1 . A method for injecting an electrolyte of a pouch type battery, comprising:
pressing a pouch type battery having a gas pocket on a first side thereof to move gas generated from the battery toward the gas pocket; piercing the gas pocket using a needle type injector, and injecting an electrolyte through the pierced portion; moving the electrolyte injected into the gas pocket toward a second side of the battery; and piercing the gas pocket to remove the gas under a vacuum, and sealing the battery.

2 . The method for injecting an electrolyte of a pouch type battery according to claim 1 , wherein the pouch type battery is a pouch type battery having undergone an activation process.

3 . The method for injecting an electrolyte of a pouch type battery according to claim 2 , wherein the gas generated is gas generated during the activation process of the pouch type battery.

4 . The method for injecting an electrolyte of a pouch type battery according to claim 2 , wherein the electrolyte replenishes electrolyte components consumed in the activation process.

5 . The method for injecting an electrolyte of a pouch type battery according to claim 1 , wherein each step is performed on the pouch type battery placed in a vertical direction with respect to a bottom thereof

6 . The method for injecting an electrolyte of a pouch type battery according to claim 1 , wherein each step is performed on the pouch type battery placed in a horizontal direction with respect to a bottom thereof

7 . The method for injecting an electrolyte of a pouch type battery according to claim 6 , further comprising:
releasing the pressing the battery; tilting the battery at a predetermined angle of inclination between the battery and the bottom to move the electrolyte toward the second side of the battery; and returning the battery to an original state to dispose the battery in a horizontal direction with respect to the bottom.

8 . The method for injecting an electrolyte of a pouch type battery according to claim 7 , wherein the predetermined angle of inclination is an angle of about 10° or greater between the battery and the bottom.

9 . The method for injecting an electrolyte of a pouch type battery according to claim 1 , wherein the battery is a lithium secondary battery.

10 . An electrolyte injection system, comprising:
a pouch type battery having a gas pocket on a first side thereof to move gas generated from the battery toward the gas pocket; and a needle type injector that pierces the gas pocket to inject an electrolyte toward a second side of the battery, wherein the gas pocket is pierced to remove the gas under a vacuum and seal the battery.

11 . The system according to claim 10 , wherein the pouch type battery is a pouch type battery having undergone an activation process.

12 . The system according to claim 11 , wherein the gas generated is gas generated during the activation process of the pouch type battery.

13 . The system according to claim 11 , wherein the electrolyte replenishes electrolyte components consumed in the activation process.

14 . The system according to claim 10 , wherein the battery is a lithium secondary battery.

Assignees

• Lg Chemical Ltd

Inventors

• Hong Suk-Hyun
• Kim Myung-Hyun
• Park Hyo-Jin
• Bae Joon-Sung
• Lee Eui-Kyung
• Heo Jin-Woo

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M4/0445

  Forming after manufacture of the electrode, e.g. first charge, cycling · CPC title

• H01M10/058 Primary

  Construction or manufacture · CPC title

• H01M50/673

  Containers for storing liquids; Delivery conduits therefor · CPC title