Patents by Inventor Nak Hee Choi

Nak Hee Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11906492
    Abstract: An apparatus for quantitatively analyzing gas, particularly oxygen, generated in a battery material, particularly a cathode material is provided. The apparatus contains a switching valve and a sampling loop in a pyrolyzer, thereby allowing an EGA method, which was used only for the qualitative analysis of gas generated from a solid sample, to be used for the quantitative analysis of gas generated at a specific temperature when heat is applied by the pyrolyzer in a battery material.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: February 20, 2024
    Assignee: LG Energy Solution, Ltd.
    Inventors: Sungwon Hong, Kyungmee Lee, Nak Hee Choi, Jeong Ae Ahn, Jin Il Kim
  • Publication number: 20230420748
    Abstract: A battery case analyzing apparatus includes a sealing portion which covers an injection hole formed on an upper side of a battery case. The sealing portion includes a lower side contacting the upper side of the battery case, a gas injection passage, and a vacuum forming passage formed in the sealing portion. The apparatus includes a gas injection line which is connected to an inlet of the gas injection passage formed on an upper side of the sealing portion, a vacuum forming line which is connected to an outlet of the vacuum forming passage formed on the upper side of the sealing portion, a gas supply portion configured to inject gas into the battery case through the gas injection line, and a vacuum pump which is connected to the vacuum forming line to form a vacuum in a vacuum forming groove formed on the lower side of the sealing portion.
    Type: Application
    Filed: July 26, 2022
    Publication date: December 28, 2023
    Inventors: Kwangyeon PARK, Nak Hee CHOI, Byoungsoo LEE
  • Publication number: 20230168159
    Abstract: The present invention relates to a gas collection device, and provides a gas collection device for collecting gas that is generated as microorganisms are cultured in a super absorbent polymer product.
    Type: Application
    Filed: September 1, 2021
    Publication date: June 1, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Jung Hye Won, Eunbyeol Ko, Nak Hee Choi, Min Hwan Jung, Ji Seok Lee, Haesung Yun
  • Patent number: 11650122
    Abstract: The present disclosure relates to an apparatus and a method for analyzing a battery case, specifically, to the apparatus for analyzing the durability of various types of battery case, such as a pouch type or can type. The apparatus comprises a first plate which is in close contact with an outer surface of a first sheet, the first sheet forming one side of the battery case; a gas injection tube which is inserted into the battery case while penetrating through the first plate and extends along an inner surface of the first sheet; and a pressure gauge which is connected to the gas injection tube.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: May 16, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Dongguk Hwang, Jae Wan Park, Sang Hyun Park, Nak Hee Choi, Ji Won Park
  • Patent number: 11650255
    Abstract: A chamber and a system for real-time analysis of gas generated inside a secondary battery. The chamber and system are capable of adjusting temperature while directly applying heat to the secondary battery. The system may include a chamber, a pump module, and an analysis module. The chamber may include a first housing which is insulative, and configured to house the secondary battery mounted in an inner space surrounded by the first housing, a second housing which is thermally conductive and surrounding the first housing, an inlet connected to the pump module, a temperature sensor configured to measure a temperature of the secondary battery or a temperature inside the chamber, and a first heat generation member configured to heat the secondary battery, the first heat generation member being configured to be inserted into the second housing.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: May 16, 2023
    Inventors: Dongguk Hwang, Jeong Ae Ahn, Nak Hee Choi
  • Patent number: 11626625
    Abstract: The present invention relates to a gas analysis apparatus for a secondary battery, the gas analysis apparatus being capable of effectively performing quantitative analysis and qualitative analysis of the gas generated up to the ignition or explosion of the secondary battery.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: April 11, 2023
    Inventors: Dongguk Hwang, Su Hyun Kim, Ji Hye Park, Jeong Ae Ahn, Nak Hee Choi
  • Patent number: 11614389
    Abstract: An apparatus for generating gas from a sample (battery) by pyrolysis of the sample in order to collect or analyze gas generated inside the sample due to the thermal behaviors of the sample. More specifically, provided is an apparatus wherein not only gas generated due to the thermal behaviors of a sample (battery) can be generated by heating the sample (battery itself), but also a series of processes provided to collect or analyze the generated gas can be automatically controlled.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: March 28, 2023
    Inventors: Sungwon Hong, Kyungmee Lee, Jeong Ae Ahn, Nak Hee Choi
  • Patent number: 11489228
    Abstract: The present invention relates to a component for measuring a pressure change in a pouch-type battery, and a method for measuring a pressure change in a pouch-type battery by using the same and, particularly, to: a component connectable to pressure gauge by being mounted in a pouch-type battery for measuring a pressure change in the pouch-type battery; and a method for measuring a pressure change in a pouch-type battery by using the same.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: November 1, 2022
    Inventors: Heesun Yun, Jeong Ae Ahn, Kyungmee Lee, Yongjun Kim, Nak Gi Sung, Nak Hee Choi
  • Patent number: 11437658
    Abstract: 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.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: September 6, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Dongguk Hwang, Won Kyung Shin, Junghyun Song, Nak Hee Choi, Jeong Ae Ahn
  • Patent number: 11374271
    Abstract: The present invention relates to an apparatus, system, and method for collecting gas generated in a secondary battery, specifically, to an apparatus, system, and method for collecting gas, which allow an operator to collect gas generated inside a secondary battery according to a desired section.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: June 28, 2022
    Inventors: Dongguk Hwang, Su Hyun Kim, Jeong Ae Ahn, Nak Hee Choi, Ji Hye Park
  • Patent number: 11362396
    Abstract: 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.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: June 14, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Dongguk Hwang, Won Kyung Shin, Junghyun Song, Nak Hee Choi, Jeong Ae Ahn
  • Publication number: 20220002648
    Abstract: The present invention relates to a gas collection device and is directed to a gas collection device for collecting a gas which is generated while microorganisms are cultured in a super absorbent polymer product. The gas collection device may comprise a constant temperature chamber having an interior that is configured to be maintained at a set temperature; a culture flask unit located inside the constant temperature chamber and configured to culture a bacteria therein; an adsorption unit located outside the constant temperature chamber and configured to receive a gas inside the culture flask unit; a pump unit connected to a rear end of the adsorption unit and configured to suck the gas inside the culture flask unit into the adsorption unit; and a mass flow controller located outside the constant temperature chamber and configured to control a flow rate of the gas sucked into the adsorption unit.
    Type: Application
    Filed: June 28, 2021
    Publication date: January 6, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Eun Byeol Ko, Jung Hye Won, Nak Hee Choi, Ji Seok Lee, Eun Yeong Jin, Hae Sung Yun
  • Patent number: 11196100
    Abstract: 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.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: December 7, 2021
    Inventors: Sungwon Hong, Jeong Ae Ahn, Ju Yong Lee, Kyungmee Lee, Junghyun Song, Nak Hee Choi
  • Publication number: 20210344055
    Abstract: 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.
    Type: Application
    Filed: April 28, 2020
    Publication date: November 4, 2021
    Inventors: Dongguk HWANG, Won Kyung SHIN, Junghyun SONG, Nak Hee CHOI, Jeong Ae AHN
  • Publication number: 20210218107
    Abstract: 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.
    Type: Application
    Filed: April 20, 2020
    Publication date: July 15, 2021
    Inventors: Dongguk Hwang, Won Kyung Shin, Junghyun Song, Nak Hee Choi, Jeong Ae Ahn
  • Publication number: 20210172827
    Abstract: The present disclosure relates to an apparatus and a method for analyzing a battery case, specifically, to the apparatus for analyzing the durability of various types of battery case, such as a pouch type or can type. The apparatus comprises a first plate which is in close contact with an outer surface of a first sheet, the first sheet forming one side of the battery case; a gas injection tube which is inserted into the battery case while penetrating through the first plate and extends along an inner surface of the first sheet; and a pressure gauge which is connected to the gas injection tube.
    Type: Application
    Filed: August 6, 2020
    Publication date: June 10, 2021
    Inventors: Dongguk Hwang, Jae Wan Park, Sang Hyun Park, Nak Hee Choi, Ji Won Park
  • Publication number: 20200350638
    Abstract: The present invention relates to a gas analysis apparatus for a secondary battery, the gas analysis apparatus being capable of effectively performing quantitative analysis and qualitative analysis of the gas generated up to the ignition or explosion of the secondary battery.
    Type: Application
    Filed: May 21, 2019
    Publication date: November 5, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Dongguk Hwang, Su Hyun Kim, Ji Hye Park, Jeong Ae Ahn, Nak Hee Choi
  • Publication number: 20200303786
    Abstract: 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.
    Type: Application
    Filed: July 3, 2019
    Publication date: September 24, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Sungwon Hong, Jeong Ae Ahn, Ju Yong Lee, Kyungmee Lee, Junghyun Song, Nak Hee Choi
  • Publication number: 20200256921
    Abstract: A chamber and a system for real-time analysis of gas generated inside a secondary battery. The chamber and system are capable of adjusting temperature while directly applying heat to the secondary battery.
    Type: Application
    Filed: June 5, 2019
    Publication date: August 13, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Dongguk Hwang, Jeong Ae Ahn, Nak Hee Choi
  • Publication number: 20200251705
    Abstract: The present invention relates to a component for measuring a pressure change in a pouch-type battery, and a method for measuring a pressure change in a pouch-type battery by using the same and, particularly, to: a component connectable to pressure gauge by being mounted in a pouch-type battery for measuring a pressure change in the pouch-type battery; and a method for measuring a pressure change in a pouch-type battery by using the same.
    Type: Application
    Filed: October 24, 2018
    Publication date: August 6, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Heesun Yun, Jeong Ae Ahn, Kyungmee Lee, Yongjun Kim, Nak Gi Sung, Nak Hee Choi