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).

  • Component for Measuring Pressure Change In Pouch-Type Battery, and Method for Measuring Pressure Change in Pouch-Type Battery by Using Same
    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
  • Apparatus, System, and Method for Collecting Gas Generated in Secondary Battery
    Publication number: 20200176833
    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: Application
    Filed: October 15, 2018
    Publication date: June 4, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Dongguk Hwang, Su Hyun Kim, Jeong Ae Ahn, Nak Hee Choi, Ji Hye Park
  • Automated Apparatus for Sample Pyrolysis
    Publication number: 20200072715
    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: Application
    Filed: December 4, 2018
    Publication date: March 5, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Sungwon Hong, Kyungmee Lee, Jeong Ae Ahn, Nak Hee Choi
  • Apparatus for Quantitatively Analyzing Oxygen Generated in Battery Material
    Publication number: 20190369072
    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: Application
    Filed: January 24, 2018
    Publication date: December 5, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Sungwon Hong, Kyungmee Lee, Nak Hee Choi, Jeong Ae Ahn, Jin Il Kim