Patents by Inventor Hee Gyoung Kang

Hee Gyoung Kang 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: 12266805
    Abstract: A pouch case is provided which includes: a forming portion having a predetermined depth, and allowing each of a first end surface and a second end surface of the electrode assembly to be received therein; a notch portion extending from each of opposite ends of the forming portion so as to have a depth gradually decreasing from a depth defined by the thickness of the electrode assembly received in the forming portion; and a storing portion covering a remaining portion other than a portion of the electrode assembly received in the forming portion. By effectively controlling a protruding structure of the pouch case sealed on the first and second end surfaces of the electrode assembly received therein, it is possible to improve contact reliability between the stacked battery cells.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: April 1, 2025
    Assignee: SK ON CO., LTD.
    Inventors: Hee Gyoung Kang, Tae Il Kim
  • Patent number: 12261286
    Abstract: Provided is a negative electrode for a secondary battery including: a current collector, and a negative electrode active material layer formed on the current collector and containing a first negative electrode active material having a large particle size and a second negative electrode active material having a small particle size, wherein the second negative electrode active material is contained in an amount of 10% by weight or less based on the total weight of the negative electrode active material, and the following Relational Equation 1 is satisfied: [Relational Equation 1] 0.4<D2/D1<0.7; wherein D1 and D2 are the particle sizes (D50, ?m) of the first and second negative electrode active materials, respectively.
    Type: Grant
    Filed: January 10, 2022
    Date of Patent: March 25, 2025
    Assignee: SK ON CO., LTD.
    Inventors: Chan Young Jeon, Hee Gyoung Kang, So Hyun Park, Hae Suk Hwang
  • Patent number: 12244001
    Abstract: Provided is a negative electrode for a secondary battery including: a current collector; and a negative electrode active material layer including a negative electrode active material, formed on the current collector, with the negative electrode satisfying Relation 1: 3.0<?*DP<7.2 ??[Relation 1] with ? a tortuosity of the negative electrode, and DP a pellet density (g/cm3) of the negative electrode active material, measured by pressing the negative electrode active material at 8 kN/cm2. Also provided is a secondary battery including the same.
    Type: Grant
    Filed: January 18, 2022
    Date of Patent: March 4, 2025
    Assignee: SK On Co., Ltd.
    Inventors: Chan Young Jeon, So Hyun Park, Hae Suk Hwang, Hee Gyoung Kang
  • Patent number: 12206096
    Abstract: An anode active material for a secondary battery according to an embodiment of the present invention includes first particles serving as a core active material and second particles attached on surfaces of the first particles. A weight of the second particles based on 100 weight parts of a total weight of the first particles and the second particles satisfies a predetermined relation. A secondary battery including the anode active material is provided.
    Type: Grant
    Filed: December 16, 2021
    Date of Patent: January 21, 2025
    Assignee: SK On Co., Ltd.
    Inventors: Mi Ryeong Lee, Hee Gyoung Kang, Jong Hyuk Lee
  • Publication number: 20240347710
    Abstract: An electrode for a lithium secondary battery includes an electrode current collector, an electrode active material layer formed on at least one surface of the electrode current collector and including electrode active material particles, and a lithium salt-containing coating formed on at least portions of surfaces of the electrode active material particles or at least a portion of the surface of the electrode active material layer. The electrode for a lithium secondary battery may have a predetermined surface roughness.
    Type: Application
    Filed: June 24, 2024
    Publication date: October 17, 2024
    Inventors: Gi Hyeon Moon, Jong Hyuk Lee, Mi Ryeong Lee, Hee Gyoung Kang
  • Publication number: 20240332511
    Abstract: An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on the anode current collector. The anode active material layer including a lower anode active material layer formed on the anode current collector and an upper anode active material layer formed on the lower anode active material layer. Each of the lower anode active material layer and the upper anode active material layer includes a first anode active material and a second anode active material having a hardness less than that of the first anode active material. A total intrusion amount of mercury to pores having a diameter of 3 nm to 10 ?m in the anode active material layer measured by a mercury porosimeter is 0.27 ml/g or more.
    Type: Application
    Filed: June 10, 2024
    Publication date: October 3, 2024
    Inventors: So Hyun PARK, Hee Gyoung KANG, Hae Suk HWANG, Chan Young JEON
  • Patent number: 12100797
    Abstract: Disclosed are a secondary battery and a method for manufacturing the same. According to an embodiment of the present invention, there is provided a secondary battery, including: an exterior material which includes a pouch film and a sealing portion formed at an outer side of the pouch film; and an electrode assembly which includes a plurality of electrode bodies laminated with a separator interposed therebetween and are packaged by the exterior material, wherein a pair of forming portions are formed within the pouch film to house the electrode assembly, and a predetermined interval is formed between the pair of forming portions.
    Type: Grant
    Filed: July 14, 2021
    Date of Patent: September 24, 2024
    Assignee: SK ON CO., LTD.
    Inventor: Hee-Gyoung Kang
  • Patent number: 12062793
    Abstract: A lithium secondary battery according to exemplary embodiments includes a cathode, a separation layer, and an anode facing the cathode with the separation layer interposed therebetween. The anode includes an anode current collector, and an anode active material layer formed on the anode current collector. The anode active material layer includes an anode active material and a conductive additive. The conductive additive includes an expandable graphite having a particle diameter of 10 ?m or less.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: August 13, 2024
    Assignee: SK On Co., Ltd.
    Inventors: Jong Hyuk Lee, Dock Young Yoon, Hee Gyoung Kang
  • Patent number: 12051799
    Abstract: An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on the anode current collector. The anode active material layer including a lower anode active material layer formed on the anode current collector and an upper anode active material layer formed on the lower anode active material layer. Each of the lower anode active material layer and the upper anode active material layer includes a first anode active material and a second anode active material having a hardness less than that of the first anode active material. A total intrusion amount of mercury to pores having a diameter of 3 nm to 10 ?m in the anode active material layer measured by a mercury porosimeter is 0.27 ml/g or more.
    Type: Grant
    Filed: October 19, 2021
    Date of Patent: July 30, 2024
    Assignee: SK ON CO., LTD.
    Inventors: So Hyun Park, Hee Gyoung Kang, Hae Suk Hwang, Chan Young Jeon
  • Patent number: 12034146
    Abstract: An electrode for a lithium secondary battery includes an electrode current collector, an electrode active material layer formed on at least one surface of the electrode current collector and including electrode active material particles, and a lithium salt-containing coating formed on at least portions of surfaces of the electrode active material particles or at least a portion of the surface of the electrode active material layer. The electrode for a lithium secondary battery may have a predetermined surface roughness.
    Type: Grant
    Filed: July 12, 2023
    Date of Patent: July 9, 2024
    Assignee: SK On Co., Ltd.
    Inventors: Gi Hyeon Moon, Jong Hyuk Lee, Mi Ryeong Lee, Hee Gyoung Kang
  • Publication number: 20240170642
    Abstract: An electrode for a lithium secondary battery includes an electrode current collector, an electrode active material layer formed on at least one surface of the electrode current collector and including electrode active material particles, and a lithium salt-containing coating formed on at least portions of surfaces of the electrode active material particles or at least a portion of the surface of the electrode active material layer. The electrode for a lithium secondary battery may have a predetermined surface roughness.
    Type: Application
    Filed: July 12, 2023
    Publication date: May 23, 2024
    Inventors: Gi Hyeon Moon, Jong Hyuk Lee, Mi Ryeong Lee, Hee Gyoung Kang
  • Patent number: 11978883
    Abstract: Provided is a fabrication method of an electrode for a secondary battery including coating an electrode slurry containing an electrode active material and a binder on a current collector; drying the current collector on which the electrode slurry is coated to form an electrode active material layer; and surface-treating the electrode active material layer formed on the current collector to remove a binder layer on a surface of the electrode active material layer.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: May 7, 2024
    Assignee: SK On Co., Ltd.
    Inventors: Jong Hyuk Lee, Mi Ryeong Lee, Hee Gyoung Kang
  • Patent number: 11870026
    Abstract: The present invention provides a lithium secondary battery which includes an electrode assembly to which an electrode tap is attached, an electrode tap receptor configured to house a portion of the electrode assembly such that a portion of the electrode tap protrudes to an outside, and a case configured to surround the electrode assembly and seal the electrode assembly together with the electrode tap receptor, wherein the electrode tap receptor includes a gas barrier layer.
    Type: Grant
    Filed: July 16, 2021
    Date of Patent: January 9, 2024
    Assignee: SK ON CO., LTD.
    Inventor: Hee-Gyoung Kang
  • Patent number: 11837728
    Abstract: An anode active material according to an embodiment of the present invention includes a first graphite particle and a second graphite particle having a different particle diameter from that of the first graphite particle. A ratio of a pellet density relative to a. tap density of the anode active material is from 1.3 to 1.45. A particle deformation of the anode is suppressed to achieve a lithium secondary battery having improved long-term and high-energy properties.
    Type: Grant
    Filed: August 5, 2021
    Date of Patent: December 5, 2023
    Assignee: SK ON CO., LTD.
    Inventors: Hae Suk Hwang, Hee Gyoung Kang, Hyo Sang Kim, So Hyun Park, Jong Hyuk Lee
  • Patent number: 11824214
    Abstract: Provided are a pouch case for a pouch type secondary battery in which one corner is in close contact with a cooling plate and a pouch type secondary battery including the same. In the pouch case, by controlling a shape relation among a forming portion formed to have a non-zero depth determined in advance at a center to accommodate one side of an electrode assembly, a receiving portion in surface contact with a side surface of the electrode assembly at the time of sealing the pouch case, and a sealing portion for sealing opposing ends of the forming portion and the electrode assembly, a size of a sealing protrusion formed after the electrode assembly is packaged through mechanical properties of a metal laminate sheet and a simplified die and punch may be minimized.
    Type: Grant
    Filed: October 5, 2021
    Date of Patent: November 21, 2023
    Assignee: SK ON CO., LTD.
    Inventors: Hee Gyoung Kang, Tae Il Kim
  • Publication number: 20230307779
    Abstract: A battery module according to an embodiment of the present invention includes a battery stack in which a plurality of battery cells including a cathode tab and an anode tab are stacked; a first bus bar assembly including a first bus bar connecting cathode tabs and anode tabs located at one end of the battery stack; and a second bus bar assembly including a second bus bar connecting cathode tabs and anode tabs located at the other end of the battery stack. The first bus bar assembly or the second bus bar assembly may include a venting part including at least one venting knife which protrudes from the first bus bar or the second bus bar toward the battery cell, such that stability of the battery module may be improved.
    Type: Application
    Filed: June 2, 2023
    Publication date: September 28, 2023
    Inventors: Jong Hyuk Lee, Su Hee Han, Hee Gyoung Kang
  • Patent number: 11728530
    Abstract: The present invention provides a lithium secondary battery and a lithium secondary battery sub module including the same. The lithium secondary battery includes: an electrode assembly; a plastic case which houses the electrode assembly and includes a gas barrier layer; and a pouch film cover which seals the plastic case having the electrode assembly housed therein, such that it is possible to achieve a battery having a significantly increased thickness so as to increase the capacity thereof without structural limitation, secure durability of the battery due to having excellent resistance to permeability, and improve productivity due to a decrease in an occurrence of poor insulation. Thereby, the lithium secondary battery sub module including the lithium secondary battery may have a high energy density and may be formed in a compact shape with reduced manufacturing costs.
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: August 15, 2023
    Assignee: SK ON CO., LTD.
    Inventor: Hee-Gyoung Kang
  • Patent number: 11710874
    Abstract: A battery module according to an embodiment of the present invention includes: a battery stack in which a plurality of battery cells including a cathode tab and an anode tab are stacked; a first bus bar assembly including a first bus bar connecting cathode tabs and anode tabs located at one end of the battery stack; and a second bus bar assembly including a second bus bar connecting cathode tabs and anode tabs located at the other end of the battery stack. The first bus bar assembly or the second bus bar assembly may include a venting part including at least one venting knife which protrudes from the first bus bar or the second bus bar toward the battery cell, such that stability of the battery module may be improved.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: July 25, 2023
    Assignee: SK ON CO., LTD.
    Inventors: Jong Hyuk Lee, Su Hee Han, Hee Gyoung Kang
  • Patent number: 11705595
    Abstract: Provided are a pouch case for a pouch type secondary battery in which one corner is in close contact with a cooling plate and a pouch type secondary battery including the same. In the pouch case, by controlling a shape relation among a forming portion formed to have a non-zero depth determined in advance at a center to accommodate one side of an electrode assembly, a receiving portion in surface contact with a side surface of the electrode assembly at the time of sealing the pouch case, and a sealing portion for sealing opposing ends of the forming portion and the electrode assembly, a size of a sealing protrusion formed after the electrode assembly is packaged through mechanical properties of a metal laminate sheet and a simplified die and punch may be minimized.
    Type: Grant
    Filed: October 5, 2021
    Date of Patent: July 18, 2023
    Assignee: SK ON CO., LTD.
    Inventors: Hee Gyoung Kang, Tae Ii Kim
  • Publication number: 20230207975
    Abstract: The present invention provide a pouch type secondary battery and a method for manufacturing the same. More particularly, the present invention provides a pouch type secondary battery and a method for manufacturing the same, in which a pouch case is formed in a folding manner without being subjected to a forming process (press process), such that there is no limit in a length, and a thickness of an inner space of the pouch case is not limited.
    Type: Application
    Filed: January 16, 2023
    Publication date: June 29, 2023
    Inventors: Jong Hyuk LEE, Hee Gyoung KANG, Dock Young YOON