Electrolyte extraction system and method

Patent metadata

Field	Value
Publication number	US-12438211-B2
Application number	US-202218282981-A
Country	US
Kind code	B2
Filing date	Jul 26, 2022
Priority date	Jul 30, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

An electrolyte extraction system and a method for extracting electrolyte from a battery using the same are provided. The electrolyte extraction system comprises a first transfer unit transferring a lower jig having an upper surface on which a battery is mounted; a loading unit accommodating the lower jig together with the battery in a freezing tank filled with liquid nitrogen; a cutting unit cutting the battery inside the freezing tank; an unloading unit taking out the lower jig together with the battery from the freezing tank and accommodating the same in an electrolyte extraction tank; and a second transfer unit transferring the electrolyte extraction tank in which the battery is accommodated.

First claim

The invention claimed is:

1. An electrolyte extraction system comprising:
a first transfer unit transferring a lower jig having an upper surface on which a battery is mounted;
a loading unit accommodating the lower jig together with the battery in a freezing tank filled with liquid nitrogen;
a cutting unit cutting the battery inside the freezing tank;
an unloading unit taking out the lower jig together with the battery from the freezing tank and accommodating the same in an electrolyte extraction tank; and
a second transfer unit transferring the electrolyte extraction tank in which the battery is accommodated.

2. The electrolyte extraction system according to claim 1 , wherein the first transfer unit and the second transfer unit are conveyor belts.

3. The electrolyte extraction system according to claim 2 , wherein a plurality of the lower jigs and a plurality of the electrolyte extraction tanks are provided,
wherein the plurality of the lower jigs are arranged along a longitudinal direction of the first transfer unit, and
wherein the plurality of the electrolyte extraction tanks are arranged along a longitudinal direction of the second transfer unit.

4. The electrolyte extraction system according to claim 1 , wherein the cutting unit comprises:
an upper jig pressing an upper surface of the battery;
a blade unit penetrating the upper jig in a vertical direction; and
a driving unit driving the upper jig and the blade unit in the vertical direction.

5. The electrolyte extraction system according to claim 4 , wherein a lower surface of the upper jig and the upper surface of the lower jig face each other with the battery interposed therebetween,
wherein the upper jig comprises a blade penetration hole, through which the blade unit passes, formed therein, and
wherein the lower jig comprises a blade protection groove formed at a position facing the blade penetration hole.

6. The electrolyte extraction system according to claim 4 , wherein the blade unit comprises:
a first blade extending in a first direction perpendicular to the vertical direction; and
a second blade extending in a second direction perpendicular to the vertical direction and the first direction.

7. The electrolyte extraction system according to claim 1 , wherein the electrolyte extraction tank is filled with an electrolyte extraction solvent, and
wherein the electrolyte extraction solvent is an organic solvent.

8. An electrolyte extraction method comprising:
a loading step of mounting a pouch-type battery on an upper surface of a lower jig;
a freezing step of immersing the lower jig on which the battery is mounted in liquid nitrogen filled in a freezing tank;
a fixing step of fixing the battery by pressing an upper surface of the battery with an upper jig;
a cutting step of cutting the battery by passing a blade through a blade penetration hole formed in the upper jig;
an unloading step of separating the upper jig from the battery and taking the battery and the lower jig out of the freezing tank; and
an electrolyte extracting step of immersing the battery and the lower jig in an electrolyte extraction solvent filled in an electrolyte extraction tank.

9. The electrolyte extraction method according to claim 8 , wherein a plurality of the batteries and a plurality of the lower jigs are provided in the loading step,
wherein each of the plurality of the batteries is mounted on each of the plurality of the lower jigs, and
wherein the freezing step, the fixing step, the cutting step, and the unloading step are sequentially performed for each of the plurality of the batteries.

10. The electrolyte extraction method according to claim 8 , wherein a plurality of the batteries are provided in the loading step,
wherein a plurality of the electrolyte extraction tanks are provided in the extracting step,
wherein each of the plurality of the batteries is accommodated in a different electrolyte extraction tank from each other.

Assignees

• Lg Energy Solution Ltd
• Lg Energy Solutions Ltd

Inventors

• Lee Daeki
• Jang Rin
• Youn Yeu Young

Classifications

• B65G15/30

  Belts or like endless load-carriers (co-operating with rails or the like B65G21/22; {co-operating} with rollers B65G39/20) · CPC title

• B01D11/0288

  Applications, solvents · CPC title

• G01N2001/1031

  Sampling from special places · CPC title

• H01M50/691 Primary

  Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings · CPC title

• G01N1/10

  in the liquid or fluent state {(burettes, pipettes B01L3/02; sampling of ground water E02D1/06; metering by volume of fluids or fluent solid material G01F11/00, G01F13/00)} · CPC title