US 12,247,698 B2
High-pressure tank and method for producing the same
Akiyoshi Furuzawa, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Dec. 17, 2021, as Appl. No. 17/644,825.
Claims priority of application No. 2020-208984 (JP), filed on Dec. 17, 2020.
Prior Publication US 2022/0196206 A1, Jun. 23, 2022
Int. Cl. F17C 1/06 (2006.01)
CPC F17C 1/06 (2013.01) [F17C 2201/0109 (2013.01); F17C 2203/0604 (2013.01); F17C 2203/0609 (2013.01); F17C 2203/0665 (2013.01); F17C 2203/067 (2013.01); F17C 2205/0305 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A high-pressure tank having dome shaped side end portions formed at opposite ends of a cylindrical portion, the high-pressure tank including:
a liner having the cylindrical portion and the dome shaped side end portions provided at opposite ends of the body; and
a reinforcing layer that covers the liner and is formed of a fiber-reinforced resin,
wherein the reinforcing layer includes a first reinforcing layer that covers the body and a second reinforcing layer that covers the first reinforcing layer and the side end portions, the first reinforcing layer having:
a hoop reinforcing layer formed through hoop winding of a resin-containing fiber bundle in a midsection of the body; and
a helical reinforcing layer arranged in parallel with the hoop reinforcing layer along an axis direction of the high-pressure tank and formed through helical winding of the fiber bundle in a section on at least one end side of the midsection, the helical reinforcing layer forming a part of the dome shaped side end portions,
wherein the helical reinforcing layer has a first end portion on a side of the hoop reinforcing layer and a second end portion on a side of the side end portion along the axis direction of the high-pressure tank, and a winding angle of the fiber bundle to form the first end portion is greater than a winding angle of the fiber bundle to form the second end portion.