JP-7856055-B2 - Hydrogen tank structure

JP7856055B2JP 7856055 B2JP7856055 B2JP 7856055B2JP-7856055-B2

Inventors

内村治弘
片岡千明

Assignees

トヨタ自動車株式会社

Dates

Publication Date: 20260511
Application Date: 20230608

Claims (3)

A hydrogen tank structure comprising multiple parallel hydrogen tanks and a long manifold connected to one end of each hydrogen tank, The aforementioned manifold is Within the manifold, a hydrogen gas flow path extends along the longitudinal direction of the manifold and communicates with the interior of each hydrogen tank, A heat insulating section provided near the hydrogen gas flow path, It has, The aforementioned heat insulating portion is provided inside the manifold and is a cavity that extends along the longitudinal direction of the manifold. A hydrogen tank structure characterized in that, when viewed from the longitudinal direction of the manifold, the cavity is formed in a C-shape in cross-section so as to surround the hydrogen gas flow path, and the C-shaped opening faces the hydrogen tank side .
A hydrogen tank structure comprising multiple parallel hydrogen tanks and a long manifold connected to one end of each hydrogen tank, The aforementioned manifold is Within the manifold, a hydrogen gas flow path extends along the longitudinal direction of the manifold and communicates with the interior of each hydrogen tank, A heat insulating section provided near the hydrogen gas flow path, It has, The hydrogen tank structure is characterized in that the heat insulating portion is a heat insulating coating provided on the inner wall surface of the hydrogen gas flow path.
A hydrogen tank structure comprising multiple parallel hydrogen tanks and a long manifold connected to one end of each hydrogen tank, The aforementioned manifold is Within the manifold, a hydrogen gas flow path extends along the longitudinal direction of the manifold and communicates with the interior of each hydrogen tank, A heat insulating section provided near the hydrogen gas flow path, It has, The hydrogen tank structure is characterized in that the heat insulating section is a gas circulation path that communicates with the hydrogen gas flow path and circulates hydrogen gas inside the manifold.

Description

This invention relates to a hydrogen tank structure. Conventionally, such a technical field includes, for example, the one described in Patent Document 1. The hydrogen tank structure described in Patent Document 1 comprises a plurality of small hydrogen tanks arranged in parallel, and a manifold for fixing these hydrogen tanks and filling each tank with hydrogen gas. A hydrogen gas flow path is provided inside the manifold, and cooled hydrogen gas is filled into each hydrogen tank via this flow path. Japanese Patent Publication No. 2019-32034 This is a schematic cross-sectional view showing a hydrogen tank structure according to the first embodiment.This is a cross-sectional view along lines A-A and B-B in Figure 1.This is a cross-sectional view showing a hydrogen tank structure according to the second embodiment.This is a cross-sectional view showing a hydrogen tank structure according to the third embodiment.This is a schematic cross-sectional view showing a hydrogen tank structure according to the fourth embodiment.This is a cross-sectional view along the lines C-C and D-D in Figure 5. The following describes embodiments of the tank holding structure according to the present invention with reference to the drawings. In the description of the drawings, identical elements are denoted by the same reference numerals, and their redundant descriptions are omitted. [First Embodiment] Figure 1 is a schematic cross-sectional view showing the hydrogen tank structure according to the first embodiment, and Figure 2 is a cross-sectional view along lines A-A and B-B in Figure 1. Note that in Figure 1, in order to make the structure of the receiving recess 34 (described later) of the manifold 3 easier to understand, the state before the hydrogen tank 2 is inserted into the receiving recess 34 is shown. The hydrogen tank structure 1 of this embodiment is, for example, mounted on a fuel cell vehicle (not shown), and comprises a plurality of parallel-arranged hydrogen tanks 2 and a long manifold 3 connected to one end of each hydrogen tank 2. The hydrogen tank 2, also called a chamber, is a small-diameter tank with a narrowed opening and is a high-pressure container having a space for storing hydrogen gas. This hydrogen tank 2 has a roughly cylindrical tank body 21 and a nozzle portion 22 attached to the open end of the tank body 21. Although not shown, the tank body 21 has a roughly cylindrical liner with dome-shaped rounded ends and a fiber-reinforced resin layer covering the outer surface of the liner. The liner may be made of aluminum or resin. The nozzle portion 22 is machined into a cylindrical shape from a metal material such as stainless steel or aluminum alloy, and has a cylindrical nozzle body 23 extending along the axial direction of the hydrogen tank 2, and a flange portion 24 connected to one end of the nozzle body 23 and projecting radially. The nozzle portion 22 is fitted onto the open end of the tank body 21 and fixed to the open end by screwing. Furthermore, a male threaded portion 231 is formed on the outer circumferential wall of the nozzle body 23, which engages with the female threaded portion 341 formed in the receiving recess 34 of the manifold 3. The flange portion 24 serves to increase the overall strength of the nozzle portion 22 and to regulate the threading depth when screwing it into the manifold 3; it is integrally formed with the nozzle body 23. As shown in Figure 1, multiple hydrogen tanks 2 having this structure are arranged in a line along one direction. Each hydrogen tank 2 is inserted into a receiving recess 34 of the manifold 3 and connected to the manifold 3 by screwing the male threaded portion 231 of the tank 2 to the female threaded portion 341 of the receiving recess 34. The manifold 3 is a metal component that serves two functions: to secure the multiple hydrogen tanks 2 and to fill each hydrogen tank 2 with hydrogen gas. In this embodiment, the manifold 3 is formed from, for example, an extruded aluminum material. The manifold 3 comprises a long, rectangular manifold body 31, a hydrogen gas flow path 32 provided inside the manifold body 31, and a heat insulating section 33 provided near the hydrogen gas flow path 32. The manifold body 31 is provided with multiple receiving recesses 34 for receiving the nozzle portion 22 of the hydrogen tank 2. As shown in Figure 1, these receiving recesses 34 are arranged at equal intervals along the longitudinal direction of the manifold body 31 and are located on the same side of the manifold body 31 (the hydrogen tank 2 side). Each receiving recess 34 consists of a cylindrical cavity and opens toward the hydrogen tank 2. The inner circumferential wall of each receiving recess 34 has a female threaded portion 341 for screwing into the male threaded portion 231 of the nozzle portion 22 of the hydrogen tank 2. The hydrogen gas flow path 32 is positioned approximately in the center of the manifold body 31 and has a main flow path 321 extending al