Lg Chem, Ltd

Lg Energy Solution, Ltd.

Junghyun Song

Jeong Ae Ahn

Nak Hee Choi

Won Kyung Shin

Dongguk Hwang

Byoung Hyoun Kim

Ju Yong Lee

Sungwon Hong

Rin Jang

Kyungmee Lee

A method for extracting electrolyte solution in lithium secondary battery includes (S) freezing a secondary battery by impregnating in liquid nitrogen and then cutting it without disassembling; (S) immersing the frozen cut secondary battery in an extraction solvent to extract an electrolyte solution contained in the battery; and (S) calculating the total amount of the electrolyte solution with respect to the total size of the battery from the content of the extracted electrolyte solution, and then determining a ratio of total amount of the electrolyte solution to the content of the electrolyte solution used in manufacturing the secondary battery to obtain extraction efficiency. A system for extracting an electrolyte solution in a secondary battery is also provided.

Method and system for extracting electrolyte in lithium secondary battery by freezing and cutting the secondary battery

A gas collecting apparatus for collecting gas generated in a secondary battery comprising an electrode assembly and a flexible pouch case containing the electrode assembly therein, the gas-collecting apparatus comprising an insert plate part including a through-hole and a pressing jig part having a gas moving path, and the gas-collecting apparatus capable of easily collecting the gas regardless of the standard size and shape of the secondary battery.

Apparatus for collecting gas in secondary battery

A gas-collecting apparatus for collecting gas generated in a secondary battery including an electrode assembly and a rigid battery case accommodating the electrode assembly therein, the gas-collecting apparatus comprising: a pressing jig part for pressing one surface of the battery case; a gas collecting pipe provided with the pressing jig part; a sealing part inserted between the pressing jig part and one surface of the battery case; and a fixing unit for fixing the pressing jig part and the battery case with the sealing member inserted between the pressing jig part and the battery case, and the gas-collecting apparatus capable of easily collecting the gas regardless of the standard size and shape of the secondary battery.

An apparatus for automatically collecting gas generated in a secondary battery which is being developed as an energy source for vehicle battery cells, mobile devices, power tools, etc., and automatically injecting the gas into an analysis apparatus so that the gas can be analyzed. The automated apparatus includes a plurality of battery holders in which a plurality of secondary batteries are capable of being mounted, respectively, a battery holder tray in which the plurality of battery holders are placed, a collecting unit which moves in the direction perpendicular to the surface of a secondary battery to be analyzed among the plurality of secondary batteries; and a punching unit which moves in the direction perpendicular to the surface of the secondary battery to punch the surface of the secondary battery The battery holder tray is capable of rotating such that the surface of the secondary battery can face the collecting unit.

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Daejeon, South Korea

Junghyun Song