Patents by Inventor Jang Weon Rhee

Jang Weon Rhee 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: 10205149
    Abstract: Provided is a manufacturing method of a polyolefin-based multilayer composite porous film, including: a) forming a composition including a polyolefin resin and diluent to a sheet; b) stretching the sheet and extracting the diluent to manufacture a film; c) performing heat-treatment on the manufactured film; and d) coating one surface or both surfaces of the heat-treated film with a coating solution containing a heat resistant resin, wherein step c) and step d) are continuously performed.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: February 12, 2019
    Assignee: SK Innovation Co., Ltd.
    Inventors: Gwigwon Kang, Dongjin Joo, Yongkyoung Kim, Jaewoong Kim, Hyungmin Kim, Jungmoon Sung, Youngjun Woo, Jang-weon Rhee, Inhwa Jung
  • Patent number: 9799869
    Abstract: The following disclosure relates to a microporous polyolefin composite film having excellent heat resistance and thermal stability, and a method for manufacturing the same. More particularly, the present invention relates to a microporous polyolefin composite film capable of improving stability and reliability of a battery by heat sealing an edge of a microporous film provided with a coating layer that includes a polymer binder and inorganic particles, and a method for manufacturing the same.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: October 24, 2017
    Assignee: SK Innovation Co., Ltd.
    Inventors: Yong Kyoung Kim, Jae Woong Kim, Young Jun Woo, Jang-Weon Rhee, Dong Jin Joo
  • Patent number: 9562164
    Abstract: Provided is a micro-porous polyolefin composite film, the micro-porous polyolefin composite film including a porous coating layer containing a polymer binder and inorganic particles, the polymer binder simultaneously employing an aqueous polymer and a non-aqueous polymer. The contents of the aqueous polymer and the non-aqueous polymer are controlled, and thus optimize heat resistance, adhesive strength, and the moisture content to thereby improve high-temperature stability, and, further, improve the adhesive strength to thereby improve stability in production, and minimize the moisture content to thereby improve reliability of a battery.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: February 7, 2017
    Assignee: SK Innovation Co., Ltd.
    Inventors: Yong Kyoung Kim, Jang-Weon Rhee, Dong Jin Joo, Young Jun Woo, Jae Woong Kim
  • Patent number: 9564624
    Abstract: Disclosed is a microporous composite film having a coating layer formed on at least one surface of a microporous polyolefin film, wherein the coating layer simultaneously includes a high thermostable polymer resin and inorganic particles. More specifically, the present invention relates to a microporous composite film in which an area shrinkage at 170° C. for 1 hr is 10% or less; a tensile modulus in each of a machine direction and a transverse direction at 130° C. is 0.5 MPa to 7.0 MPa; a ratio between permeability of a microporous composite film (CCSp) and permeability of a microporous polyolefin film (Sp) is 1.1?CCSp/Sp?3.5; and a permeability of the microporous composite film is 450 sec or less.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: February 7, 2017
    Assignee: SK Innovation Co., Ltd.
    Inventors: Yong Kyoung Kim, Jang Weon Rhee, Dong Jin Joo, Je An Lee, Jung Moon Sung
  • Publication number: 20160030974
    Abstract: Provided is a manufacturing method of a polyolefin-based multilayer composite porous film, including: a) forming a composition including a polyolefin resin and diluent to a sheet; b) stretching the sheet and extracting the diluent to manufacture a film; c) performing heat-treatment on the manufactured film; and d) coating one surface or both surfaces of the heat-treated film with a coating solution containing a heat resistant resin, wherein step c) and step d) are continuously performed.
    Type: Application
    Filed: July 29, 2015
    Publication date: February 4, 2016
    Inventors: Gwigwon Kang, Dongjin Joo, Yongkyoung Kim, Jaewoong Kim, Hyungmin Kim, Jungmoon Sung, Youngjun Woo, Jang-weon Rhee, Inhwa Jung
  • Publication number: 20150004467
    Abstract: The following disclosure relates to a microporous polyolefin composite film having excellent heat resistance and thermal stability, and a method for manufacturing the same. More particularly, the present invention relates to a microporous polyolefin composite film capable of improving stability and reliability of a battery by heat sealing an edge of a microporous film provided with a coating layer that includes a polymer binder and inorganic particles, and a method for manufacturing the same.
    Type: Application
    Filed: February 7, 2013
    Publication date: January 1, 2015
    Inventors: Yong Kyoung Kim, Jae Woong Kim, Young Jun Woo, Jang-Weon Rhee, Dong Jin Joo
  • Patent number: 8920913
    Abstract: Provided is a porous multi-layer film having two or more layers that is used as a separator for battery. In the film, more than 2 layers have different porosities and pore sizes. The film has a thickness of 9 to 50 ?m, a machine direction (MD) loop stiffness of 0.008 mg/?m or more, puncture strength of 0.15 N/?m or more, permeability of 1.5×10?5 Darcy or more, shut-down temperature of 140° C. or less, melt-down temperature of 170° C. or more, a transverse direction (TD) maximum shrinkage of 25% or less in Thermomechanical Analysis (TMA) under a load of 1 mN/(1 ?m×6 mm), and melt down temperature of 160° C. or more. Since the porous multi-layer film shows excellent thermal stability at high temperature and electrolyte retaining property due to a dual pore structure, the film shows a superior effect when used as a separator for high-capacity/high-power lithium ion battery.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: December 30, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jang Weon Rhee, Gwi Gwon Kang, In Hwa Jung, Young Keun Lee
  • Publication number: 20140349193
    Abstract: Provided is a method of manufacturing a microporous polyolefin film useable as a battery separator, which is easy to control strength, permeability and shrinking properties of the microporous film and embodies excellent quality uniformity and production stability in fabricating the microporous film.
    Type: Application
    Filed: June 10, 2014
    Publication date: November 27, 2014
    Inventors: Gwi Gwon KANG, Jang-Weon Rhee, In Hwa Jung
  • Publication number: 20140295170
    Abstract: Provided is a micro-porous polyolefin composite film, the micro-porous polyolefin composite film including a porous coating layer containing a polymer binder and inorganic particles, the polymer binder simultaneously employing an aqueous polymer and a non-aqueous polymer. The contents of the aqueous polymer and the non-aqueous polymer are controlled, and thus optimize heat resistance, adhesive strength, and the moisture content to thereby improve high-temperature stability, and, further, improve the adhesive strength to thereby improve stability in production, and minimize the moisture content to thereby improve reliability of a battery.
    Type: Application
    Filed: October 29, 2012
    Publication date: October 2, 2014
    Inventors: Yong Kyoung Kim, Jang-Weon Rhee, Dong Jin Joo, Young Jun Woo, Jae Woong Kim
  • Patent number: 8801984
    Abstract: The present invention relates to a multi-layered microporous polyolefin film for a battery separator and a method for preparing the same. The microporous multi-layered film of the present invention has a characteristics to have both the low shutdown temperature conferred by the polyethylene and the high melt fracture temperature conferred by the polypropylene and heat-resistant filler. In addition, it has the high strength and stability conferred by the micropores prepared under wet process and the high permeability and high strength conferred by the macropores prepared under dry process. Therefore, this multi-layered film can be used effectively to manufacture a secondary battery with high capacity and high power.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: August 12, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jang-Weon Rhee, Inhwa Jung, Gwigwon Kang, Youngkeun Lee
  • Patent number: 8790559
    Abstract: Provided is a method of manufacturing a microporous polyolefin film useable as a battery separator, which is easy to control strength, permeability and shrinking properties of the microporous film and embodies excellent quality uniformity and production stability in fabricating the microporous film.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: July 29, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Gwi Gwon Kang, Jang-Weon Rhee, In Hwa Jung
  • Patent number: 8597775
    Abstract: A microporous polyolefin multilayer film which is used as a separator for a battery is a 3 layer microporous film which is prepared by a wet process to have both surface layers containing polyethylene of 95 wt % or more having a melting temperature of 125° C. or higher, and an inner layer containing polypropylene of 50 to 90 wt % having a melting temperature of 160° C. or higher and polyethylene of 10 to 50 wt % having a melting temperature of 125° C. or higher. A thickness of the film is 9-50/M, a puncture strength is 0.15N//M or more, a permeability is 1.5×10?5 Darcy or more, a multiplication of the puncture strength and the permeability is 0.4×10?5 Darcy·N/?m or more, a shrinkage in a transverse direction at 120° C. for 1 hour is 15% or less, and a melt fracture temperature of 160° C. or higher.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: December 3, 2013
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jang-Weon Rhee, In Hwa Jung, Gwig Won Kang, Young Keun Lee
  • Publication number: 20130287937
    Abstract: Disclosed are a multi-layer composite porous film and a manufacturing method thereof. More particularly, a manufacturing method, which includes filling pores on at least one face of a polyolefin microporous film substrate using a solvent, and then, applying a coating solution that contains a polymer binder or the polymer binder and inorganic particles, to the film to form a porous coating layer, as well as the multi-layer composite porous film manufactured by the same, are disclosed. The method for manufacturing the multi-layer composite porous film according to the disclosure may provide a multi-layer composite porous film having excellent permeability and shutdown function, without clogging the pores, by improving a coating process. Moreover, if applying the foregoing porous film as a separator to a battery, the battery having superior performance and high safety may be manufactured.
    Type: Application
    Filed: August 12, 2011
    Publication date: October 31, 2013
    Applicant: SK INNOVATION CO., LTD.
    Inventors: Dong Jin Joo, Jang Weon Rhee, Jung Moon Sung, Je An Lee, Yong Kyoung Kim
  • Patent number: 8563120
    Abstract: The present invention relates to a multi-layered microporous polyolefin film for a battery separator and a method for preparing the same. The microporous multi-layered film of the present invention has a characteristics to have both the low shutdown temperature conferred by the polyethylene and the high melt fracture temperature conferred by the polypropylene and heat-resistant filler. In addition, it has the high strength and stability conferred by the micropores prepared under wet process and the high permeability and high strength conferred by the macropores prepared under dry process. Therefore, this multi-layered film can be used effectively to manufacture a secondary battery with high capacity and high power.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: October 22, 2013
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jang-Weon Rhee, Inhwa Jung, Gwigwon Kang, Youngkeun Lee
  • Publication number: 20130224558
    Abstract: Disclosed is a microporous composite film having a coating layer formed on at least one surface of a microporous polyolefin film, wherein the coating layer simultaneously includes a high thermostable polymer resin and inorganic particles. More specifically, the present invention relates to a microporous composite film in which an area shrinkage at 170° C. for 1 hr is 10% or less; a tensile modulus in each of a machine direction and a transverse direction at 130° C. is 0.5 MPa to 7.0 MPa; a ratio between permeability of a microporous composite film (CCSp) and permeability of a microporous polyolefin film (Sp) is 1.1?CCSp/Sp?3.5; and a permeability of the microporous composite film is 450 sec or less.
    Type: Application
    Filed: June 10, 2011
    Publication date: August 29, 2013
    Applicant: SK INNOVATION CO., LTD.
    Inventors: Yong Kyoung Kim, Jang Weon Rhee, Dong Jin Joo, Je An Lee, Jung Moon Sung
  • Patent number: 8486521
    Abstract: The present invention relates to a microporous polyethylene film for use as battery separator. The microporous polyethylene film according to the present invention is characterized by having a film thickness of 5-40 ?m, a porosity of 35-55%, a permeability from 2.5×10?5 to 10.0 10?5 Darcy, a puncture strength of at least 0.10 N/?m at 90° C., a puncture angle of at least 30° at 90° C., and a permeability from 2.0 10?5 to 8.0 10?5 Darcy after shrinking freely at 120° C. for 1 hour. The microporous polyethylene film in accordance with the present invention has very superior puncture strength and thermal stability at high temperature and takes place of less decrease of permeability due to low thermal shrinkage at high temperature, as well as superior permeability. Therefore, it can be usefully applied in a high-capacity, high-power battery to improve thermal stability and long-term stability of the battery.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: July 16, 2013
    Assignee: SK Innovation Co., Ltd.
    Inventors: Inhwa Jung, Jang-Weon Rhee, Gwigwon Kang, Youngkeun Lee, Yongkyoung Kim
  • Publication number: 20130116355
    Abstract: Provided is a method of manufacturing a microporous polyolefin film useable as a battery separator, which is easy to control strength, permeability and shrinking properties of the microporous film and embodies excellent quality uniformity and production stability in fabricating the microporous film.
    Type: Application
    Filed: April 20, 2011
    Publication date: May 9, 2013
    Inventors: Gwi Gwon Kang, Jang-Weon Rhee, In Hwa Jung
  • Patent number: 8354185
    Abstract: The present invention relates to a microporous polyethylene film for use as battery separator. The microporous polyethylene film according to the present invention is characterized by having a film thickness of 5-40 ?m, a porosity of 35-55%, a permeability from 2.5×10?5 to 10.0 10?5 Darcy, a puncture strength of at least 0.10 N/?m at 90° C., a puncture angle of at least 30° at 90° C., and a permeability from 2.0 10?5 to 8.0 10?5 Darcy after shrinking freely at 120° C. for 1 hour. The microporous polyethylene film in accordance with the present invention has very superior puncture strength and thermal stability at high temperature and takes place of less decrease of permeability due to low thermal shrinkage at high temperature, as well as superior permeability. Therefore, it can be usefully applied in a high-capacity, high-power battery to improve thermal stability and long-term stability of the battery.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: January 15, 2013
    Assignee: SK Innovation Co., Ltd.
    Inventors: Inhwa Jung, Jang-Weon Rhee, Gwigwon Kang, Youngkeun Lee, Yongkyoung Kim
  • Patent number: 8323547
    Abstract: Disclosed in the present invention are a microporous polyethylene film and a method of manufacture thereof. The polyethylene microporous film manufactured according to the present invention may contribute to an increased productivity of stable products as its extrusion and stretching may be done readily. And thus manufactured product may be used for battery separators and various filters owing to its high gas permeability, superior puncture strength, and small ratio of shrinkage.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: December 4, 2012
    Assignee: SK Innovation Co., Ltd.
    Inventors: Young-Keun Lee, Jang-Weon Rhee, Jung-Moon Sung, Byoung-Cheon Jo, Chol-Ho Lee, Gwi-Gwon Kang, In-Hwa Jung, Je-An Lee
  • Publication number: 20120301698
    Abstract: Provided is a porous multi-layer film having two or more layers that is used as a separator for battery. In the film, more than 2 layers have different porosities and pore sizes. The film has a thickness of 9 to 50 ?m, a machine direction (MD) loop stiffness of 0.008 mg/?m or more, puncture strength of 0.15 N/?m or more, permeability of 1.5×10?5 Darcy or more, shut-down temperature of 140° C. or less, melt-down temperature of 170° C. or more, a transverse direction (TD) maximum shrinkage of 25% or less in Thermomechanical Analysis (TMA) under a load of 1 mN/(1 ?m×6 mm), and melt down temperature of 160° C. or more. Since the porous multi-layer film shows excellent thermal stability at high temperature and electrolyte retaining property due to a dual pore structure, the film shows a superior effect when used as a separator for high-capacity/high-power lithium ion battery.
    Type: Application
    Filed: January 25, 2011
    Publication date: November 29, 2012
    Applicant: SK INNOVATION CO., LTD.
    Inventors: Jang Weon Rhee, Gwi Gwon Kang, In Hwa Jung, Young Keun Lee