Patents by Inventor Min Kwak

Min Kwak 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: 20250192165
    Abstract: The present invention relates to a negative electrode including a negative electrode collector, a first negative electrode active material layer disposed on the negative electrode collector, and a second negative electrode active material layer disposed on the first negative electrode active material layer, wherein the second negative electrode active material layer includes a second negative electrode active material and a second conductive agent, wherein the second negative electrode active material includes a silicon-based active material, the silicon-based active material includes SiOx (0?x<2), the second conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded side by side, and the carbon nanotube structure is included in an amount of 0.01 wt % to 1.0 wt % in the second negative electrode active material layer, and a secondary battery including the same.
    Type: Application
    Filed: February 25, 2025
    Publication date: June 12, 2025
    Applicant: LG Energy Solution, Ltd.
    Inventors: Tae Gon Kim, Ki Won Sung, Joo Yul Baek, Min Kwak
  • Publication number: 20250158022
    Abstract: A positive electrode material for a lithium secondary battery includes: a first positive electrode active material and a second positive electrode active material. The first positive electrode active material includes a lithium transition metal oxide in which a molar ratio of nickel among transition metals is 70 mol % or more, the second positive electrode active material includes a lithium transition metal oxide in which a molar ratio of nickel among transition metals is 25 mol % or more less than the molar ratio of the nickel among the transition metals of the first positive electrode active material, an average particle diameter of primary particles constituting the second positive electrode active material is larger than an average particle diameter of primary particles constituting the first positive electrode active material, and D50 of the second positive electrode active material is smaller than D50 of the first positive electrode active material.
    Type: Application
    Filed: February 15, 2023
    Publication date: May 15, 2025
    Applicant: LG Energy Solution, Ltd.
    Inventors: Kang Joon Park, So Ra Baek, Wang Mo Jung, Sin Young Park, Hyuck Hur, Dong Hwi Kim, Min Kwak, Seul Ki Chae
  • Publication number: 20250149571
    Abstract: The present invention relates to positive electrode active material powder including overlithiated manganese-based oxide particles, which are represented by the disclosed Formula 1 and are in the form of a single particle composed of one nodule or a pseudo-single particle that is a composite of 2 to 30 or less nodules, and a positive electrode and a lithium secondary battery which include the positive electrode active material powder.
    Type: Application
    Filed: February 10, 2023
    Publication date: May 8, 2025
    Applicant: LG Energy Solution, Ltd.
    Inventors: Hyuck Hur, Sin Young Park, Gi Beom Han, Dong Hwi Kim, Min Kwak, Seul Ki Chae, Kang Joon Park, Wang Mo Jung
  • Publication number: 20250132343
    Abstract: Disclosed are an electrode, a secondary battery comprising the same and an energy storage system, the electrode comprising: an electrode current collector; and an electrode layer on the electrode current collector, the electrode layer comprising an active material, a conductive material and a fluorine-containing binder, wherein the electrode layer has a quantified binder ratio (QBR) of 1.1 or less, and the QBR is defined as the following equation: QBR = Bs / Bf . , Bs denotes an average fluorine content in an electrode layer surface region within 15% of a total thickness of the electrode layer from an outermost surface of the electrode layer, and Bf denotes an average fluorine content in an electrode layer bottom region within 15% of the total thickness of the electrode layer from an interface between the electrode layer and the current collector.
    Type: Application
    Filed: October 4, 2022
    Publication date: April 24, 2025
    Applicant: LG Energy Solution, Ltd.
    Inventors: Nam-Jeong Lee, Koo-Seung Chung, Sang-Min Kwak, Ji-Hyun Kim, Dong-Oh Shin, Ki-Seok Lee, Kwang-Ho Yoo
  • Patent number: 12266800
    Abstract: An electrode includes an electrode active material layer, wherein the electrode active material layer includes an electrode active material and a conductive agent, wherein the conductive agent includes a first conductive agent and a second conductive agent, wherein the first conductive agent includes a secondary particle in which a plurality of graphene sheets are arranged in different directions and a portion of one graphene sheet is connected to a portion of adjacent another graphene sheet, the second conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, and the carbon nanotube structure is included in an amount of 0.01 wt % to 0.5 wt % in the electrode active material layer. A secondary battery including the electrode is also provided.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: April 1, 2025
    Assignee: LG Energy Solution, Ltd.
    Inventors: Tae Gon Kim, Sin Young Park, Bo Ram Lee, Hyung Man Cho, Tae Gu Yoo, Min Kwak
  • Patent number: 12261302
    Abstract: A negative electrode includes a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material and a conductive agent, wherein the negative electrode active material includes a silicon-based active material, the silicon-based active material includes SiOx(0?x<2), the conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded side by side, and the carbon nanotube structure is included in an amount of 0.01 wt % to 1.0 wt % in the negative electrode active material layer. A secondary battery including the negative electrode, and a method of preparing same are also provided.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: March 25, 2025
    Assignee: LG Energy Solution, Ltd.
    Inventors: Tae Gon Kim, Hyung Man Cho, Il Jae Moon, Sun Wook Park, Min Kwak
  • Patent number: 12261325
    Abstract: A battery module including a cell stack structure in which a plurality of battery cells including a first battery cell and a second battery cell neighboring each other are stacked. A bus bar frame assembly includes a plurality of lead drawing holes from which electrode leads included in the plurality of battery cells are drawn out. An electrode lead of a first polarity included in the first battery cell and an electrode lead of the first polarity included in the second battery cell are externally drawn out through a same lead drawing hole. The electrode lead of the first battery cell and the electrode lead of the second battery cell are bent in a same direction at a same location and each includes a first bent portion formed on a terrace portion and a second bent portion formed in a region where a lead film is formed.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: March 25, 2025
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Won-Kyoung Park, Jun-Yeob Seong, Jung-Min Kwak, Jun-Kyu Park
  • Patent number: 12261288
    Abstract: A positive electrode active material, a method for producing the same, and a positive electrode and a lithium secondary battery in including the same are disclosed herein. In some embodiments, a method of producing a positive electrode active material includes mixing a lithium transition metal oxide and a carbon-based material having a hollow structure to form a mixture, and mechanically treating the mixture to form a carbon coating layer on the surface of the lithium transition metal oxide, wherein the carbon-based material has a chain shape, and has a specific surface area of 500 m2/g or greater, a graphitization degree (ID/IG) of 1.0 or higher, and a dibutylphthalate (DBP) absorption of 300 mL/100 g or greater.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: March 25, 2025
    Assignee: LG Energy Solution, Ltd.
    Inventors: Min Kwak, Tae Gon Kim, Byung Chun Park, Bo Ram Lee, Tae Gu Yoo
  • Patent number: 12255324
    Abstract: The present invention relates to a negative electrode including a negative electrode collector, a first negative electrode active material layer disposed on the negative electrode collector, and a second negative electrode active material layer disposed on the first negative electrode active material layer, wherein the second negative electrode active material layer includes a second negative electrode active material and a second conductive agent, wherein the second negative electrode active material includes a silicon-based active material, the silicon-based active material includes SiOx (0?x<2), the second conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded side by side, and the carbon nanotube structure is included in an amount of 0.01 wt % to 1.0 wt % in the second negative electrode active material layer, and a secondary battery including the same.
    Type: Grant
    Filed: April 21, 2021
    Date of Patent: March 18, 2025
    Assignee: LG Energy Solution, Ltd.
    Inventors: Tae Gon Kim, Ki Won Sung, Joo Yul Baek, Min Kwak
  • Patent number: 12249706
    Abstract: The present invention relates to a silicon-carbon composite negative electrode active material, a negative electrode including the same, and a secondary battery, wherein the silicon-carbon composite negative electrode active material includes a core containing SiOX (0?X<2), a carbon layer covering at least a portion of the surface of the core, a carbon nanotube structure positioned on the carbon layer, and a polyvinylidene fluoride coating at least a portion of the carbon nanotube structure, wherein the carbon nanotube structure has a structure formed by arranging and bonding 2 to 5,000 single-walled carbon nanotube units side by side, and a portion of the carbon nanotube structure is bonded to the carbon layer.
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: March 11, 2025
    Assignee: LG Energy Solution, Ltd.
    Inventors: Tae Gon Kim, Yong Ju Lee, Il Geun Oh, Min Kwak, Je Young Kim, Wang Mo Jung
  • Patent number: 12249714
    Abstract: The present disclosure relates to a positive electrode additive, a manufacturing method thereof, and a positive electrode and a lithium rechargeable battery including the same. Specifically, one embodiment of the present disclosure provides a positive electrode additive for a lithium rechargeable battery comprising: a compound represented by the following Chemical Formula 1; a compound represented by the following Chemical Formula 2; and lithium phosphate (Li3PO4): Li2+aNibM1?bO2+c??[Chemical Formula 1] wherein, M is a metal element forming a divalent cation, ?0.2?a?0.2, 0.5?b?1.0, and ?0.2?c?0.2, Ni2?eM1?eP4O12??[Chemical Formula 2] wherein, 0.5?e?1.0, and M is the same as defined in Chemical Formula 1.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: March 11, 2025
    Assignee: LG Energy Solution, Ltd.
    Inventors: Boram Lee, Sin Young Park, Tae Gu Yoo, Taegon Kim, Min Kwak, Wang Mo Jung
  • Publication number: 20250079458
    Abstract: A positive electrode active material powder includes overlithiated manganese-based oxide particles, which are represented by [Formula 1] and are in the form of a single particle composed of one nodule or a pseudo-single particle that is a composite of 2 to 30 nodules. LiaNibCocMndMeO2??[Formula 1] wherein 1<a, 0?b?0.5, 0?c?0.1, 0.5?d<1.0, and 0?e?0.2, and M is at least one selected from the group consisting of aluminum (Al), boron (B), cobalt (Co), tungsten (W), magnesium (Mg), vanadium (V), titanium (Ti), zinc (Zn), gallium (Ga), indium (In), ruthenium (Ru), niobium (Nb), tin (Sn), strontium (Sr), and zirconium (Zr). The positive electrode active material powder has an average particle diameter D50 of 2.5 ?m or less. A positive electrode and a lithium secondary battery which include the positive electrode active material powder are also provided.
    Type: Application
    Filed: February 10, 2023
    Publication date: March 6, 2025
    Applicant: LG Energy Solution, Ltd.
    Inventors: Hyuck Hur, Sin Young Park, Gi Beom Han, Dong Hwi Kim, Min Kwak, Seulki Chae, Kang Joon Park, Wang Mo Jung
  • Patent number: 12224454
    Abstract: A battery module according to an embodiment of the present disclosure includes a plurality of battery cells, a busbar frame assembly supporting the plurality of battery cells and including a plurality of busbars electrically connected to electrode leads of the plurality of battery cells, and a plurality of fixing jig holes provided in top and bottom surfaces of the busbar frame assembly, and into which welding jigs for fixing the busbar frame assembly are configured to be inserted in a welding process for electrically connecting the electrode leads of the plurality of battery cells to the plurality of busbars.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: February 11, 2025
    Assignee: LG Energy Solution, Ltd.
    Inventors: Young-Ho Lee, Jung-Min Kwak, Do-Hyun Park, Jae-Hyun You
  • Publication number: 20250038168
    Abstract: A method of manufacturing a lithium secondary battery includes (1) mixing a transition metal precursor and a lithium source material and then sintering the mixture to prepare a lithium composite transition metal oxide, (2) mixing the lithium composite transition metal oxide with a cobalt-containing raw material and heat-treating the mixture at 550° C. to 700° C. to form a cobalt coating layer on the oxide, (3) mixing the lithium composite transition metal oxide on which the cobalt coating layer is formed with a boron-containing raw material and heat-treating the mixture at 400° C. to 500° C. to prepare a positive electrode active material including a boron coating layer, (4) applying the positive electrode active material onto a positive electrode current collector to prepare a positive electrode, and (5) assembling the positive electrode, the negative electrode including a silicon-based negative electrode active material, and a separator, and injecting an electrolyte.
    Type: Application
    Filed: December 21, 2022
    Publication date: January 30, 2025
    Applicant: LG Energy Solution, Ltd
    Inventors: So Ra Baek, Kang Joon Park, Wang Mo Jung, Sin Young Park, Hyuck Hur, Dong Hwi Kim, Min Kwak, Seul Ki Chae
  • Patent number: 12074342
    Abstract: A battery module includes a cell stack formed by stacking a plurality of battery cells; a bus bar frame assembly including a bus bar frame configured to cover one longitudinal end and the other longitudinal end of the cell stack and a plurality of bus bars fixed on the bus bar frame and electrically connected to the battery cells; and a FPCB assembly including a first FPCB extending along a longitudinal direction of the cell stack to cover at least a portion of an upper surface of the cell stack, a second FPCB extending from both longitudinal ends of the first FPCB and electrically connected to the bus bars, and a pair of temperature sensors mounted to both longitudinal ends of the first FPCB.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: August 27, 2024
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Jong-Ha Jeong, Do-Hyun Park, Young-Ho Lee, Jung-Min Kwak, Jae-Hyun You
  • Publication number: 20240266542
    Abstract: The present disclosure relates to a conductive material master batch for use in an electrode and an electrode obtained by using the same. The electrode obtained by using the conductive material master batch has an electrode resistance of 55 ohm·cm or less.
    Type: Application
    Filed: April 20, 2023
    Publication date: August 8, 2024
    Applicant: LG Energy Solution, Ltd.
    Inventors: Seong-Wook Kang, Jae-Sung Han, Sang-Min Kwak, Kyung-Hwan Yoon, Dong-Oh Shin, Ki-Seok Lee, Kwang-Ho Yoo, Nam-Jeong Lee
  • Publication number: 20240250254
    Abstract: Provided is a positive electrode active material comprising at least one secondary particle comprising an agglomerate of a primary macro particle, a method for preparing the same and a lithium secondary battery comprising the same. By the simultaneous use of the secondary particle comprising a primary macro particle and a monolith, it is possible to provide a nickel-based positive electrode active material with reduced particle cracking in the positive electrode active material during a rolling process and improved charge/discharge cycling characteristics.
    Type: Application
    Filed: December 7, 2021
    Publication date: July 25, 2024
    Applicant: LG Energy Solution, Ltd.
    Inventors: Eun-Sol Lho, Joong-Yeop Do, Kang-Joon Park, Gi-Beom Han, Min Kwak, Sang-Min Park, Dae-Jin Lee, Sang-Wook Lee, Wang-Mo Jung
  • Publication number: 20240228325
    Abstract: A positive electrode active material for a lithium secondary battery has secondary micro particles having an average particle size (D50) of 1 to 10 ?m formed by agglomeration of primary macro particles having an average particle size (D50) of 0.5 to 3 ?m and a lithium-M oxide coating layer on all or part of a surface, wherein M is at least one selected from the group consisting of boron, cobalt, manganese and magnesium. The secondary macro particles have an average particle size (D50) of 5 to 20 ?m formed by agglomeration of primary micro particles having a smaller average particle size (D50) than the primary macro particles. The primary macro particles and the primary micro particles are represented by LiaNi1?b?c?dCobMncQdO2+?, wherein 1.0?a?1.5, 0<b<0.2, 0<c<0.2, 0?d?0.1, 0<b+c+d?0.2, ?0.1???1.0, and Q is at least one type of metal selected from the group consisting of Al, Mg, V, Ti and Zr.
    Type: Application
    Filed: January 14, 2022
    Publication date: July 11, 2024
    Applicant: LG Energy Solution, Ltd.
    Inventors: Eun-Sol Lho, Joong-Yeop Do, Kang-Joon Park, Gi-Beom Han, Min Kwak, Sang-Min Park, Dae-Jin Lee, Sang-Wook Lee, Wang-Mo Jung
  • Patent number: 12021252
    Abstract: A battery module according to an embodiment of the present disclosure includes a plurality of battery cells, a module case accommodating the plurality of battery cells therein, a busbar frame assembly slidably inserted into the module case to support the plurality of battery cells, the busbar frame assembly including a plurality of busbars electrically connected to electrode leads of the plurality of battery cells, and a fuse unit connected to at least one pair of busbars of the plurality of busbars, the fuse unit being provided between the at least one pair of busbars.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: June 25, 2024
    Assignee: LG Energy Solution, Ltd.
    Inventors: Do-Hyun Park, Jung-Min Kwak, Young-Ho Lee, Jong-Ha Jeong
  • Patent number: 11978923
    Abstract: A battery module includes a cell stack formed by stacking a plurality of battery cells; a bus bar frame assembly; and an outer terminal. The bus bar frame assembly includes a bus bar frame and a plurality of bus bars fixed on the bus bar frame and electrically connected to the battery cells, the bus bar frame being configured to cover first and second opposing longitudinal ends of the cell stack, and the outer terminal is connected to the plurality of bus bars. A pair of electrode leads of each of the battery cells are formed at locations offset downwardly from a center of the cell stack in a height direction, and the outer terminal is disposed in the space formed above the electrode leads due to the offsetting of the electrode leads.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: May 7, 2024
    Assignee: LG Energy Solution, Ltd.
    Inventors: Dai-Ki Min, Jung-Min Kwak, Jong-Ha Jeong