公开(公告)号：US20240274820A1

公开(公告)日：2024-08-15

申请号：US18283377

申请日：2022-03-18

Applicant: WINGO TECHNOLOGY CO., LTD. ,  DKS CO. LTD.

Inventor： Toshiyuki GOSHIMA ,  Win Maw SOE ,  Atsuhiko HIBINO ,  Masashi NAKAYAMA ,  Tetsuya HIGASHIZAKI

IPC: H01M4/62 ,  C08G73/10 ,  H01M4/02 ,  H01M4/13 ,  H01M10/0525

CPC classification number: H01M4/62 ,  C08G73/10 ,  C08G73/105 ,  C08G73/1064 ,  H01M4/13 ,  H01M10/0525 ,  H01M2004/028

Abstract: A polyimide used as an electrode material capable of remarkably improving the cycle characteristics of a lithium-ion secondary battery is provided. The polyimide is a polyimide used as an electrode material for lithium-ion secondary batteries, in which a diamine component contains an aromatic diamine compound represented by the following Formula (1).

公开(公告)号：US20230207889A1

公开(公告)日：2023-06-29

申请号：US17913237

申请日：2021-03-09

Applicant: DKS CO. LTD.

Inventor： Yuji HOSHIHARA ,  Akiyoshi NISHIKAWA ,  Tetsuya HIGASHIZAKI ,  Soki KAJI

IPC: H01M10/39 ,  H01M10/0525

CPC classification number: H01M10/399 ,  H01M10/0525 ,  H01M2300/0048

Abstract: Provided is a technique with high strength, superior ionic conductivity, and superior electrical characteristics.
A lithium ion secondary battery includes a positive electrode, a negative electrode, and a polymer electrolyte. The polymer electrolyte contains a lithium salt, an ionic liquid, and a polymer. The ionic liquid contains a bis(fluorosulfonyl)imide anion as an anion component. The content of the lithium salt is 2 mol/kg or more and 6 mol/kg or less based on the sum of the content of the ionic liquid and the content of the polymer. The content of the polymer is 25% by mass or more and 40% by mass or less based on the sum of the content of the ionic liquid and the content of the polymer.

公开(公告)号：US20230261196A1

公开(公告)日：2023-08-17

申请号：US18014685

申请日：2021-10-06

Applicant: DKS Co. Ltd.

Inventor： Masaaki MATSUMOTO ,  Akiyoshi NISHIKAWA ,  Koichi SAKAMOTO ,  Tetsuya HIGASHIZAKI

IPC: H01M4/62 ,  H01G11/38

CPC classification number: H01M4/622 ,  H01G11/38 ,  H01M4/625 ,  H01G11/06

Abstract: A technique relating to a binder having high workability while retaining binding properties is provided.
An electrode binder composition includes an aqueous polyurethane resin dispersion in which a polyurethane resin is dispersed in water, a carbon nanotube, and a surfactant. The surfactant includes at least one selected from the group consisting of nonionic surfactants, silicon-based surfactants, and fluorine-based surfactants, and a content of the surfactant is 0.1 mass % or more and 20 mass % or less relative to a total amount of the polyurethane resin, the carbon nanotube, and the surfactant.

公开(公告)号：US20230134720A1

公开(公告)日：2023-05-04

申请号：US17910566

申请日：2021-03-09

Applicant: DKS Co. Ltd.

Inventor： Akiyoshi NISHIKAWA ,  Tetsuya HIGASHIZAKI ,  Ayano SOFUE ,  Toshiya WATANABE ,  Fumiya KANEKO

IPC: H01M50/414 ,  C08L75/04 ,  C08G18/08 ,  C08G18/62 ,  C08G18/44 ,  C08G18/75 ,  C08G18/76

Abstract: A technology which exhibits a low internal resistance and good output characteristics is provided.
An aqueous polyurethane resin dispersion for a secondary battery separator includes an aqueous polyurethane resin dispersion containing a polyurethane resin dispersed in water, the polyurethane resin being obtained by reacting a polyol, a polyisocyanate compound, and a chain extender. The polyol contains a polycarbonate polyol. The polyurethane resin has a crosslink density of 0.02 mol/kg or more and 0.28 mol/kg or less.

公开(公告)号：US20210328291A1

公开(公告)日：2021-10-21

申请号：US17273354

申请日：2019-09-09

Applicant: DKS Co. Ltd.

Inventor： Akiyoshi NISHIKAWA ,  Tetsuya HIGASHIZAKI ,  Mana ISHINO ,  Tadashi TAKEKAWA ,  Toshikazu AKAO

IPC: H01M50/162 ,  H01M50/148 ,  H01M10/0525

Abstract: A high-quality battery pack is efficiently produced without using any potting material. A battery cover sheet 10 is a sheet member formed of a resin composition containing an inorganic filler, and has flexibility enough to cover, along the shape of the outer surface of a battery (such as a cylindrical lithium-ion battery 20A), at least partially the outer surface. For example, of the outer surface of the cylindrical lithium-ion battery 20A except for both end surfaces, the outer peripheral surface is covered with the battery cover sheet 10 and a seam 10a is fixed with a fixing member such as an adhesive tape 11, to thereby form a sheet-covered battery 30A. In this case, the battery cover sheet 10 forms a battery holder.

公开(公告)号：US20250019242A1

公开(公告)日：2025-01-16

申请号：US18705675

申请日：2022-10-27

Applicant: DKS Co. Ltd.

Inventor： Masashi NAKAYAMA ,  Atsuhiko HIBINO ,  Mika YAMAMOTO ,  Tetsuya HIGASHIZAKI

IPC: C01B32/174 ,  H01M4/02 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525

Abstract: Provided is a dispersion of carbon nanotubes having excellent dispersibility in an organic solvent. A dispersion according to an embodiment includes carbon nanotubes dispersed in an organic solvent with a polyimide containing an aromatic diamine compound represented by the following general formula (1) as a polymerization component. In formula (1), R1 to R8 are each selected from the group consisting of a hydrogen atom, a fluorine atom, a saturated aliphatic group, a saturated alicyclic group, and an aromatic group, and at least one of R1 to R8 is an aromatic group.

公开(公告)号：US20210320365A1

公开(公告)日：2021-10-14

申请号：US17268167

申请日：2019-08-20

Applicant: DKS Co Ltd.

Inventor： Akiyoshi NISHIKAWA ,  Tetsuya HIGASHIZAKI ,  Mana ISHINO ,  Takashi KITAGAWA ,  Toshikazu AKAO

IPC: H01M50/213 ,  H01M50/229 ,  H01M50/293

Abstract: Provided are a battery holder that enables efficient production of a high-quality battery pack, and a battery pack using the battery holder.
A battery holder 10 at least includes a tubular body having a through-space (battery-housing portion 10a) for housing a battery such as a lithium-ion battery 20. This tubular body includes a fibrous substrate 11 and a resin composition 12 containing an inorganic filler.

公开(公告)号：US20220231380A1

公开(公告)日：2022-07-21

申请号：US17268261

申请日：2019-08-20

Applicant: DKS Co. Ltd.

Inventor： Akiyoshi NISHIKAWA ,  Tetsuya HIGASHIZAKI ,  Mana ISHINO ,  Tadashi TAKEKAWA ,  Toshikazu AKAO

IPC: H01M50/489 ,  H01M50/474 ,  H01M50/48 ,  H01M50/572

Abstract: The safety of an assembled battery is improved. An insulating sheet 10 is to be interposed between battery cells 20 having planar surfaces 34 facing each other and is formed of a resin composition containing an inorganic filler. An assembled battery 50 includes a plurality of battery cells 20 having planar surfaces 34 and the insulating sheet 10. The insulating sheet 10 is interposed in at least one facing section 36 of the plurality of battery cells 20 whose planar surfaces 34 are arranged to face each other.