Patents by Inventor Dong Ju Lee

Dong Ju Lee 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).

  • Publication number: 20250210690
    Abstract: Disclosed is a solid electrolyte membrane, a method for manufacturing the same, and an all-solid-state battery including the same. More specifically, the solid electrolyte membrane includes a first solid electrolyte layer including a first solid electrolyte and a first fibrous binder and a second solid electrolyte layer including a second solid electrolyte and a second fibrous binder, stacked adjacent to each other, wherein the weight of the first fibrous binder relative to the total weight of the first solid electrolyte layer is less than the weight of the second fibrous binder relative to the total weight of the second solid electrolyte layer. Since the weight of a first fibrous binder included in the first solid electrolyte layer is less than the weight of the second fibrous binder included in the second solid electrolyte layer, the strength may be improved without lowering the ionic conductivity of the solid electrolyte membrane.
    Type: Application
    Filed: December 20, 2023
    Publication date: June 26, 2025
    Applicants: LG ENERGY SOLUTION, LTD., THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Jung-Pil LEE, Min-Sang SONG, Jiyoung KIM, Dong Ju LEE, Zheng CHEN
  • Publication number: 20250210693
    Abstract: Disclosed is a solid electrolyte membrane, a method for manufacturing the same, and an all-solid-state battery containing the same. More specifically, the solid electrolyte membrane includes a first solid electrolyte layer and a second solid electrolyte layer stacked adjacent to each other, and the first solid electrolyte layer has a structure in which particulate binders are dispersed, and the second solid electrolyte layer has a structure in which fibrous binders are entangled or connected to each other, and thus the strength may be improved without lowering the ionic conductivity of the solid electrolyte membrane. The solid electrolyte membrane may be substantially free of solvent.
    Type: Application
    Filed: November 13, 2024
    Publication date: June 26, 2025
    Applicants: LG ENERGY SOLUTION, LTD., THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Jung-Pil LEE, Min-Sang SONG, Jiyoung KIM, Dong Ju LEE, Zheng CHEN
  • Publication number: 20250062394
    Abstract: Methods for preparing a solid electrolyte membrane are described. More particularly, a small amount of binder may be fiberized through a dry calendering process to prepare a solid electrolyte membrane. Since the fiberized binder is included in an entangled state within the solid electrolyte membrane, it shows excellent characteristics in both ionic conductivity and strength.
    Type: Application
    Filed: August 15, 2023
    Publication date: February 20, 2025
    Applicants: LG ENERGY SOLUTION, LTD., The Regents of the University of California
    Inventors: Jung Pil LEE, Min Sang SONG, Zheng CHEN, Dong Ju LEE
  • Patent number: 12176482
    Abstract: Disclosed is a solid electrolyte membrane, a method for manufacturing the same, and an all-solid-state battery containing the same. More specifically, the solid electrolyte membrane includes a first solid electrolyte layer and a second solid electrolyte layer stacked adjacent to each other, and the first solid electrolyte layer has a structure in which particulate binders are dispersed, and the second solid electrolyte layer has a structure in which fibrous binders are entangled or connected to each other, and thus the strength may be improved without lowering the ionic conductivity of the solid electrolyte membrane. The solid electrolyte membrane may be substantially free of solvent.
    Type: Grant
    Filed: December 20, 2023
    Date of Patent: December 24, 2024
    Assignees: LG ENERGY SOLUTION, LTD., THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Jung-Pil Lee, Min-Sang Song, Jiyoung Kim, Dong Ju Lee, Zheng Chen
  • Patent number: 12151939
    Abstract: The present disclosure relates to a carbon nanotube fiber having improved physical properties and a method for manufacturing the same. The method according to the present disclosure comprises the steps of: spinning carbon nanotubes with a purity of 90% by weight or more to obtain a first carbon nanotube fiber; and heat-treating the first carbon nanotube fiber at 500 to 3,000° C. under an inert gas atmosphere to obtain a second carbon nanotube fiber, wherein the second carbon nanotube fiber has a density of 1.0 to 2.5 g/cm3.
    Type: Grant
    Filed: July 28, 2021
    Date of Patent: November 26, 2024
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Bon Cheol Ku, Jun Yeon Hwang, Hyeon Su Jeong, Nam Ho You, Nam Dong Kim, Dae Yoon Kim, Dong Ju Lee, Seo Gyun Kim, Seung Ki Hong, Seung Woo Ryu
  • Publication number: 20240288390
    Abstract: A method for analyzing a structure of a solid electrolyte film, including a step of: immersing the solid electrolyte film including a solid electrolyte and a binder into a polar solvent to remove the solid electrolyte from the solid electrolyte film; and analyzing a structure of the solid electrolyte film in which the solid electrolyte is removed.
    Type: Application
    Filed: February 22, 2024
    Publication date: August 29, 2024
    Inventors: Jung Pil LEE, Min Sang SONG, Dong Ju LEE, Zheng CHEN
  • Publication number: 20240258562
    Abstract: The present disclosure relates to a solid electrolyte film, its fabrication method, and an all-solid-state battery including the same. More specifically, the solid electrolyte film comprises a slurry including a sulfide and/or halide-based solid electrolyte, a binder, and a solvent, coated on a substrate and then dried and pressed. By pressing at a temperature equal to or above a glass transition temperature (Tg) of the binder, the packing density of the solid electrolyte film is increased, thereby improving the ionic conductivity.
    Type: Application
    Filed: January 24, 2024
    Publication date: August 1, 2024
    Inventors: Jung Pil LEE, Min Sang Song, Dong Ju Lee, Zheng Chen
  • Publication number: 20240213522
    Abstract: A solid electrolyte film and an all-solid-state battery including the same, wherein the solid electrolyte film is fabricated by a dry process of physically mixing sulfide-based and/or halide-based solid electrolyte particles with a binder, wherein the binder is fiberized in the dry process and forms fiberized binders in an intertwined state, so that a small amount of binder is sufficient to provide improved ionic conductivity and strength.
    Type: Application
    Filed: December 22, 2023
    Publication date: June 27, 2024
    Inventors: Jung Pil LEE, Min Sang SONG, Dong Ju LEE, Zheng CHEN
  • Publication number: 20240132652
    Abstract: The present disclosure relates to a thermoplastic polyurethane composition for injection molding and a method for manufacturing the same. Specifically, the thermoplastic polyurethane composition includes 0.5% by weight to 10.0% by weight of a sulfonate diol, 13% by weight to 60% by weight of an isocyanate, 30% by weight to 70% by weight of an ether-containing polyester polyol, and 5% by weight to 40% by weight of a chain extender.
    Type: Application
    Filed: April 17, 2023
    Publication date: April 25, 2024
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, DONGSUNG CHEMICAL Co., Ltd., HANWHA ADVANCED MATERIALS CORPORATION
    Inventors: Boo Youn An, In Soo Han, Sang Hyuk Lee, Jae Chan Lee, Hoon Jeong Kim, Gyu Min Lee, Sung Bok Kwak, Dong Ju Lee, Jae Yong Lee
  • Patent number: 11959193
    Abstract: Disclosed are a spinning dope for an aramid and carbon-nanotube composite fiber and a method of manufacturing an aramid and carbon-nanotube composite fiber using the same.
    Type: Grant
    Filed: March 22, 2022
    Date of Patent: April 16, 2024
    Assignee: Korea Institute of Science and Technology
    Inventors: Dae Yoon Kim, Ki Hyun Ryu, Bon Cheol Ku, Jun Yeon Hwang, Nam Dong Kim, Dong Ju Lee, Seo Gyun Kim
  • Publication number: 20240079834
    Abstract: A removable fastening system includes a rail unit located in a vehicle, an electrode portion located at the inner side of the rail unit, a fixing unit having one end inserted to be fixed to the rail unit, and a mounting unit mounted at another end of the fixing unit, wherein the fixing unit is inserted into the rail unit and has a conductive portion rotated to be brought into contact with the electrode portion.
    Type: Application
    Filed: May 19, 2023
    Publication date: March 7, 2024
    Inventors: Ji Seob PARK, Ji Ah Kim, Jin Ho Hwang, Jae Yong Lee, Dong Ju Lee
  • Publication number: 20230252079
    Abstract: The present disclosure relates to a method of generating, by a terminal, an integrated graph using a distributed graph including: receiving source node information from a user; identifying, by a graph types module, a location of a graph database related to a type of a source node based on the source node information; requesting, by a graph manager module, graph data to an application corresponding to the location of the graph database; receiving the graph data from the application; and integrating, by a graph integration module, a node and an edge based on the source node and the graph data to generate the integrated graph.
    Type: Application
    Filed: June 16, 2022
    Publication date: August 10, 2023
    Applicant: S2W INC.
    Inventors: Dong Ju LEE, Chan Hee LEE, Jae Min CHOI, Soo Yeon PARK
  • Patent number: 11656285
    Abstract: A method for determining a low voltage defect of a lithium secondary battery is provided. The method includes measuring a primary voltage of a lithium secondary battery whose formation process has been completed, transporting the lithium secondary battery, measuring temperatures to which the lithium secondary battery has been exposed during the transporting process, measuring a secondary voltage of a lithium secondary battery whose transporting has been completed, revising the secondary voltage to calculate a corrected secondary voltage based on the temperature to which the lithium secondary battery has been exposed, and comparing the primary voltage and the corrected secondary voltage to determine whether the lithium secondary battery is defective.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: May 23, 2023
    Assignees: Hyundai Motor Company, Kia Corporation
    Inventors: Dong Hui Kim, Se Young Lee, Dong Ju Lee
  • Publication number: 20230114595
    Abstract: Disclosed are a spinning dope for an aramid and carbon-nanotube composite fiber and a method of manufacturing an aramid and carbon-nanotube composite fiber using the same.
    Type: Application
    Filed: March 22, 2022
    Publication date: April 13, 2023
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Dae Yoon KIM, Ki Hyun RYU, Bon Cheol KU, Jun Yeon HWANG, Nam Dong KIM, Dong Ju LEE, Seo Gyun KIM
  • Patent number: 11524088
    Abstract: A portable sterilizer according to an embodiment of the present application is capable of spraying ultra-fine chemicals, and includes a housing in which a space is formed and an injection nozzle is provided at a front end thereof, a chemical tank provided on one side of the space of the housing, a chemical feed pipe formed between the chemical tank and the injection nozzle, and a water pump which is installed on one side of the chemical supply pipe to supply the chemical to the injection nozzle through the chemical supply pipe.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: December 13, 2022
    Assignee: PARTICLE CO., LTD.
    Inventors: Doo Hyun Choi, Dong Ju Lee, Youn Goo Choi
  • Publication number: 20220381833
    Abstract: A method for determining a low voltage defect of a lithium secondary battery is provided.
    Type: Application
    Filed: November 19, 2021
    Publication date: December 1, 2022
    Inventors: Dong Hui KIM, Se Young LEE, Dong Ju LEE
  • Patent number: 11506781
    Abstract: An apparatus for correcting an error of a radar sensor for a vehicle and a method thereof can correct a target measurement error of the radar sensor installed inside a bumper of the vehicle based on target information obtained from a camera image. The apparatus includes: a radar sensor that is installed inside a bumper of the vehicle to detect a target, a camera that photographs a surrounding image of the vehicle, and a controller that corrects a target detection error of the radar sensor based on target information obtained from an image photographed by the camera.
    Type: Grant
    Filed: May 8, 2020
    Date of Patent: November 22, 2022
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Dong Ju Lee
  • Publication number: 20220305162
    Abstract: A portable sterilizer according to an embodiment of the present application is capable of spraying ultra-fine chemicals, and includes a housing in which a space is formed and an injection nozzle is provided at a front end thereof, a chemical tank provided on one side of the space of the housing, a chemical feed pipe formed between the chemical tank and the injection nozzle, and a water pump which is installed on one side of the chemical supply pipe to supply the chemical to the injection nozzle through the chemical supply pipe.
    Type: Application
    Filed: September 1, 2020
    Publication date: September 29, 2022
    Inventors: Doo Hyun CHOI, Dong Ju LEE, Youn Goo CHOI
  • Publication number: 20220227631
    Abstract: The present disclosure relates to a carbon nanotube fiber having improved physical properties and a method for manufacturing the same. The method according to the present disclosure comprises the steps of: spinning carbon nanotubes with a purity of 90% by weight or more to obtain a first carbon nanotube fiber; and heat-treating the first carbon nanotube fiber at 500 to 3,000° C. under an inert gas atmosphere to obtain a second carbon nanotube fiber, wherein the second carbon nanotube fiber has a density of 1.0 to 2.5 g/cm3.
    Type: Application
    Filed: July 28, 2021
    Publication date: July 21, 2022
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Bon Cheol KU, Jun Yeon HWANG, Hyeon Su JEONG, Nam Ho YOU, Nam Dong KIM, Dae Yoon KIM, Dong Ju LEE, Seo Gyun KIM, Seung Ki HONG, Seung Woo RYU
  • Patent number: 11394106
    Abstract: Various embodiments of the present invention relate to an electronic device comprising a wireless communication circuit, and a portable communication device.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: July 19, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Ju Lee, Won Jin Choi, Bong Sup Son, Moon Hyuk Choi, Se Woong Ahn, Su Ho Jin, Jung Hyun Park, Sung Jun Kim, Sung Chul Park, Ji Woo Lee