Patents by Inventor Rikiya Yamashita

Rikiya Yamashita 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: 11097461
    Abstract: A battery packaging material including a laminate that is provided with a barrier layer, a heat-fusible resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on other surface side of barrier layer. This battery packaging material is configured from at least a laminate provided with a barrier layer, heat-fusible resin layer positioned on one surface side of barrier layer, and a polyester film positioned on other surface side of barrier layer. When infrared absorption spectrum on the polyester film's surface in 18 directions at intervals of 10° from 0°-180° is obtained using total reflection method of Fourier transform infrared spectroscopy, the ratio of the maximum value and the minimum value of the ratio (Y1340/Y1410) of the absorption peak intensity Y1340 in 1340 cm?1 and the absorption peak intensity Y1410 in 1410 cm?1 in the infrared absorption spectrum is in the range of 1.4-2.7.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: August 24, 2021
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Daisuke Yasuda, Rikiya Yamashita, Takanori Yamashita
  • Publication number: 20210257699
    Abstract: A battery includes a battery element, housing body, and valve device. The housing body has a laminate including a base material, barrier, and heat-sealable resin layers. The valve device is in communication with the housing body inside. A joined edge portion in which the mutually facing heat-sealable resin layers are fused together is formed in a housing body peripheral edge portion. The valve device includes first and second portions. A valve mechanism reduces the housing body internal pressure if it is increased due to gas generated in the housing body is formed in the first portion. An air passage guides gas generated in the housing body toward the valve mechanism is formed in the second portion. The first portion is located on a joined edge portion edge outer side. At least a portion of the second portion is sandwiched between the heat-sealable resin layers in the joined edge portion.
    Type: Application
    Filed: May 28, 2019
    Publication date: August 19, 2021
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Youichi MOCHIZUKI, Atsuko TAKAHAGI, Rikiya YAMASHITA, Miho SASAKI
  • Publication number: 20210257696
    Abstract: A battery includes a battery element, housing body, and valve device. The housing body includes at least one laminate and an interior space wherein the battery element is housed, a first housing portion covers the interior space from a first side in a thickness direction, and a second housing portion that covers the interior space from a second side opposite to the first side in the thickness direction. The valve device attaches to the housing body and makes the interior space communicate with an external space. A joined edge portion is formed in the housing body by the first and second housing portion being fused along respective peripheral edges. The valve device is between the first and second housing portion in the joined edge portion, and an inner end of the valve device protrudes from an inner edge of the joined edge portion toward the interior space.
    Type: Application
    Filed: May 28, 2019
    Publication date: August 19, 2021
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Youichi MOCHIZUKI, Atsuko TAKAHAGI, Rikiya YAMASHITA, Miho SASAKI
  • Publication number: 20210249729
    Abstract: A battery includes a battery element, a housing body, and a valve device. The housing body houses the battery element. The valve device is in communication with the inside of the housing body. Heat-sealable resin layers face each other in a peripheral edge portion of the housing body. A joined edge portion in which the mutually facing heat-sealable resin layers are fused together is formed in the peripheral edge portion of the housing body. The valve device is configured to reduce an internal pressure of the housing body if the internal pressure is increased due to gas generated in the housing body. The valve device includes a first portion that is located on an outer side of an edge of the joined edge portion and a second portion that is sandwiched between the heat-sealable resin layers in the joined edge portion.
    Type: Application
    Filed: May 28, 2019
    Publication date: August 12, 2021
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Youichi MOCHIZUKI, Atsuko TAKAHAGI, Rikiya YAMASHITA, Miho SASAKI
  • Publication number: 20210234222
    Abstract: This adhesive film for a metal terminal is interposed between a metal terminal electrically connected to an electrode of a battery element and a wrapping material sealing the battery element and is provided with at least one resin layer having a polyolefin backbone. When the adhesive film for the metal terminal is measured with a differential scanning calorimeter, a melting peak is observed within the range of 120° C. to 156° C.
    Type: Application
    Filed: June 20, 2019
    Publication date: July 29, 2021
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Kenta HIRAKI, Jun TANAKA, Takahiro KATO, Atsuko TAKAHAGI, Rikiya YAMASHITA
  • Publication number: 20210218106
    Abstract: A battery includes a battery element, a housing body, and a valve device. The housing body is constituted by at least one laminate and includes an interior space in which the battery element is housed, a first housing portion that covers the interior space from a first side, and a second housing portion that covers the interior space from a second side. The valve device is attached to the housing body and can make interior space of housing body be in communication with an external space. A joined edge portion is formed in housing body as a result of the first and second housing portion being fused along respective peripheral edge portions. The valve device is sandwiched between the first and second housing portion in the joined edge portion, and an inner end of the valve device protrudes from an inner edge of joined edge portion toward the interior space.
    Type: Application
    Filed: May 28, 2019
    Publication date: July 15, 2021
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Youichi MOCHIZUKI, Atsuko TAKAHAGI, Rikiya YAMASHITA, Miho SASAKI
  • Patent number: 11024832
    Abstract: A film-shaped packaging material for a cell in which a coating layer is provided as the outermost layer instead of a substrate layer and an adhesive layer in a conventional film-shaped packaging material for a cell, thereby making it possible to produce a thinner film; wherein the packaging material is provided with exceptional moldability and insulation performance and enables lead time to be reduced. The packaging material is a laminate having at least a coating layer, a barrier layer, and a sealant layer in the stated order, the coating layer including a single- or multiple-layer configuration formed by a cured product of a resin composition containing a heat-curable resin and curing accelerator, the laminate having a piercing strength of at least 5 N, as measured in compliance with JIS 1707:1997, and the coating layer having a breakdown voltage of at least 1.0 kV, as measured in compliance with JIS C2110-1.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: June 1, 2021
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Youhei Hashimoto, Rikiya Yamashita, Shunsuke Ueda
  • Patent number: 10985419
    Abstract: A battery packaging material which is slim, has excellent moldability, effectively prevents curl after molding, and moreover, is capable of imparting sufficient surface insulation to a battery. This battery packaging material is configured from a laminate which is at least provided with a polyester film layer, an aluminum alloy foil layer, and a thermally-fusible resin layer in this order. The thickness of the polyester film layer is 23-27 ?m, the thickness of the aluminum alloy foil layer is 33-37 ?m, the thickness of the thermally-fusible resin layer is 55-65 ?m, the thickness of the laminate is 130 ?m or less, and the insulation breakdown voltage of the polyester film layer-side surface is 13 kV or greater.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: April 20, 2021
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Daisuke Yasuda, Takanori Yamashita, Rikiya Yamashita
  • Publication number: 20210043878
    Abstract: A packaging material for batteries including a laminate in which at least a base material layer, a metal layer, and a sealant layer are laminated in order. The battery packaging material satisfies the relationships of: (A1?A2)?60 N/15 mm; and (B1?B2)?50 N/15 mm. A1 is a stress in elongation by 10% in the MD direction and B1 is a stress in elongation by 10% in the TD direction in the laminate, and A2 is a stress in elongation by 10% in the MD direction and B2 is a stress in elongation by 10% in the TD direction in the base material layer.
    Type: Application
    Filed: October 22, 2020
    Publication date: February 11, 2021
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Atsuko TAKAHAGI, Rikiya YAMASHITA, Daisuke YASUDA
  • Patent number: 10886506
    Abstract: Provided is a cell packaging material having a high insulating performance and durability. A cell packaging material comprising a layered body provided with at least a substrate layer, a metal layer, an adhesive layer, and a heat-fusible resin layer in the stated order. The adhesive layer has a resin composition that contains an acid-modified polyolefin and an epoxy resin. In probe displacement amount measurements involving the use of a thermal mechanical analyzer, when a probe is placed on the surface of the adhesive layer at an end part of the cell packaging material and the probe is heated from 40° C. to 220° C., the position of the probe does not drop in relation to the initial value.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: January 5, 2021
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Kaoru Miyazaki, Hirotoshi Sakamoto, Yousuke Hayakawa, Rikiya Yamashita, Takanori Yamashita, Tsuyoshi Suzuki, Yoichi Mochizuki, Kazuhiko Yokota, Tetsuya Ojiri
  • Publication number: 20200381679
    Abstract: A packaging material for batteries, which is not susceptible to warping, while having excellent formability. A packaging material for batteries is configured from a laminate that is sequentially provided at least with one or more substrate layers, a barrier layer, a cured resin layer and a thermally fusible resin layer in this order. At least one of the substrate layers is formed of a polybutylene terephthalate film; and the value (X/Y) which is obtained by dividing the puncture strength X (N) of the laminate by the thickness Y (?m) of the polybutylene terephthalate film, the puncture strength X (N) being determined by piercing the laminate from the substrate layer side by a method that complies with the prescription of JIS Z1707 (1997), is 1.02 N/?m or more.
    Type: Application
    Filed: March 20, 2018
    Publication date: December 3, 2020
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Kenta HIRAKI, Atsuko TAKAHAGI, Rikiya YAMASHITA
  • Patent number: 10854855
    Abstract: A packaging material for batteries including a laminate in which at least a base material layer, a metal layer, and a sealant layer are laminated in order, the sum (A+B) of a value A of stress when 40% extended/stress when 10% extended in the direction MD and a value B of stress when 40% extended/stress when 10% extended in the direction TD of the laminate satisfying the relationship A+B?2.50.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: December 1, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Atsuko Takahagi, Rikiya Yamashita, Daisuke Yasuda
  • Patent number: 10854396
    Abstract: A packaging material for electrochemical cells, which has insulating properties sufficient for preventing a short circuit, while exhibiting excellent electrolyte solution resistance and water vapor barrier properties. A packaging material for electrochemical cells is obtained by sequentially laminating a metal layer, an adhesive resin layer and a thermally adhesive resin layer in this order, wherein: a base coating layer is provided between the metal layer and the adhesive resin layer; and the base coating layer contains at least a zirconium oxide (A) having an average particle diameter within the range of from 1 nm to 500 nm (inclusive), one or more phosphorus-containing compounds (B) selected from the group of phosphorus compounds having 4 or more phosphonic groups in each molecule, and an acid-modified polyolefin resin (C).
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: December 1, 2020
    Assignees: DAI NIPPON PRINTING CO., LTD., NIHON PARKERIZING CO., LTD.
    Inventors: Kazuhiko Yokota, Rikiya Yamashita, Yasuhiko Nagashima
  • Patent number: 10818891
    Abstract: A resin composition can impart high insulating properties, sealing properties, and moldability to a battery packaging material. A resin composition minimizes cracks when used in the sealant layer of a battery packaging material and a heat seal section of the material is bent, and can impart high insulating properties. A resin composition for use in the sealant layer of a battery packaging material contains: at least one of a propylene-ethylene random copolymer having a melting point of 156° C. or more and an ethylene content of 5 mass % or less and a propylene-ethylene block copolymer having a melting point of 158° C. or more and an ethylene content of 7 mass % or less; and a polyolefin elastomer having a melting point of 135° C. or more. A resin composition for the sealing layer of a battery packaging material contains a polyolefin resin having an isotactic fraction of 99% or less.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: October 27, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Rikiya Yamashita, Hiroki Douke
  • Patent number: 10777785
    Abstract: A battery packaging material includes a laminate that includes at least a base material layer, a metal layer, an insulating layer, and a sealant layer laminated in this order. The insulating layer is formed of a resin composition containing a modified polyolefin resin modified with an unsaturated carboxylic acid or acid anhydride thereof and has a hardness, when measured by using a nanoindenter and pressing an indenter 5 ?m into the insulating layer from a cross-section of the laminate in the laminating direction thereof, that ranges from 10 MPa to 300 MPa. In the sealant layer, an elastic modulus, when measured by using a nanoindenter and pressing an indenter 5 ?m into the sealant layer from a cross-section of the laminate in the laminating direction thereof, ranges from 100 MPa to 1000 MPa.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: September 15, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Tetsuya Ojiri, Tsuyoshi Suzuki, Kazuhiko Yokota, Rikiya Yamashita, Masakazu Kandori
  • Publication number: 20200243810
    Abstract: A battery packaging material includes a laminate with at least a base layer, an aluminum alloy foil layer, and a heat-fusible resin layer in this order, and in which the aluminum alloy foil layer satisfies the chemical composition in JIS A8021 and has a Si content of no higher than 0.08 mass %.
    Type: Application
    Filed: September 28, 2018
    Publication date: July 30, 2020
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Rikiya YAMASHITA, Makoto AMANO
  • Patent number: 10720612
    Abstract: A battery packaging material that is excellent in continuous productivity of batteries. A battery packaging material comprising a laminate having at least a base material layer, a barrier layer, and a heat-sealable resin layer in this order, wherein the heat-sealable resin layer contains a lubricant, and when a Vickers-shaped indenter is pressed into a surface of the heat-sealable resin layer opposite to the barrier layer at a loading speed of 5 mN/10 sec, using PICODENTOR (registered trademark) HM500, in an environment at a temperature of 24° C. and a relative humidity of 50%, an indentation depth of the indenter into the heat-sealable resin layer at the point when a load on the indenter reaches 3.0 mN is 5.8 ?m or less.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: July 21, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Makoto Amano, Daisuke Yasuda, Takanori Yamashita, Rikiya Yamashita
  • Publication number: 20200194737
    Abstract: A battery packaging material including a laminate including at least a base material layer, a barrier layer, an adhesive layer, and a heat-sealable resin layer in this order, in which crushing of the adhesive layer is effectively prevented when the heat-sealable resin layer is heat-sealed with itself, and a high sealing strength is achieved in a high-temperature environment. The battery packaging material includes a laminate including at least a base material layer, a barrier layer, an adhesive layer, and a heat-sealable resin layer in this order, wherein the adhesive layer has a logarithmic decrement ?E of 2.0 or less at 120° C. according to rigid-body pendulum measurement.
    Type: Application
    Filed: April 20, 2018
    Publication date: June 18, 2020
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Daisuke YASUDA, Yosuke HAYAKAWA, Kaoru TSUMORI, Takanori YAMASHITA, Rikiya YAMASHITA
  • Publication number: 20200168857
    Abstract: A battery packaging material having excellent long-term adhesion of a barrier layer having an acid resistance film. The battery packaging material includes a laminate including at least a base material layer, a barrier layer, and a heat-sealable resin layer in this order, wherein the battery packaging material includes an acid resistance film on at least one surface of the barrier layer, and when the acid resistance film is analyzed using time-of-flight secondary ion mass spectrometry, a PPO3/CrPO4 ratio, which is the ratio of peak intensity PPO3 derived from PO3? to peak intensity PCrPO4 derived from CrPO4?, falls within a range of 6 to 120.
    Type: Application
    Filed: July 19, 2018
    Publication date: May 28, 2020
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Kaoru TSUMORI, Takanori YAMASHITA, Rikiya YAMASHITA
  • Patent number: 10614962
    Abstract: Provided is a packaging material for an electrochemical cell which prevents the occurrence of short circuits. A packaging material for an electrochemical cell configured by laminating a base material layer including: at least a resin film; a heat-adhesive layer including a heat-adhesive resin, the heat-adhesive layer being disposed on the innermost layer; and a barrier layer including a metal foil, the barrier layer being disposed between the base material layer and the heat-adhesive layer, wherein a chemical-conversion-treated layer including alumina particles and modified epoxy resin is formed on the surface of at least the heat adhesive layer side of the barrier layer.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: April 7, 2020
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Hirohisa Akita, Makoto Amano, Kazuhiko Yokota, Rikiya Yamashita