# US 12,760,844 B2 · Hydrogen tank > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,760,844 B2 - Document ID: US12760844B2 - Status: Granted - Kind: B2 - Application number: 18/943,439 - Filed: 2024-11-11 - Published: 2025-12-18 - Granted: 2026-10-13 - Earliest claimed: 2024-06-13 - Assignees: Hyundai Motor Company; Kia Corporation - Applicants: Hyundai Motor Company; Kia Corporation - Inventors: Jin Gyo Suh; Kyu Young Lee - Web page: https://patentgrep.com/patent/US12760844B2 ## CPC - F17C 13/002: {for vessels under pressure (F17C13/008 and F17C13/02 - F17C13/12 take precedence)} - F17C 2201/0109: with exteriorly curved end-piece - F17C 2205/0305: Bosses, e.g. boss collars - F17C 2221/012: Hydrogen - F17C 2260/023: Avoiding overheating - F17C 2265/06: Fluid distribution - F17C: VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES (storing fluids in natural or artificial cavities or chambers in the earth B65G5/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00; variable-capacity gas-holders F17B; liquefaction or refrigeration machines, plants, or systems F25) ## Abstract A hydrogen tank includes a tank body, a boss connected to at least one end of the tank body and having a skirt extending radially with respect to an axial direction of the tank body, and a nozzle installed inside the tank body via the boss and configured to spray hydrogen gas at a predetermined angle with respect to the axial direction of the tank body. The nozzle includes a connector coupled to the boss, an extension portion extending from the connector parallel to the axial direction of the tank body, an inclined portion connected to an end portion of the extension portion and inclined with respect to the axial direction of the tank body, and an injection member provided at an end portion of the inclined portion. ## Claims ### Claim 1 A hydrogen tank comprising: a tank body; a boss connected to at least one end of the tank body and having a skirt extending radially with respect to an axial direction of the tank body; and a nozzle installed inside the tank body via the boss and configured to spray hydrogen gas at a predetermined angle with respect to the axial direction of the tank body, wherein the nozzle includes: a connector coupled to the boss; an extension portion extending from the connector parallel to the axial direction of the tank body; an inclined portion connected to an end portion of the extension portion and inclined with respect to the axial direction of the tank body; and an injection member provided at an end portion of the inclined portion, wherein the skirt has an inward surface formed toward an inside of the tank body, and wherein the inward surface has an inclined surface inclined at a first inclination angle with respect to a direction perpendicular to the axial direction of the tank body. ### Claim 2 (depends on 1) The hydrogen tank of claim 1, wherein the extension portion has an extension portion length, and the extension portion length is determined by the following equation: le=rs/cos Ψ1 wherein le is the extension portion length, rs is a skirt radius, Ψ1 is the first inclination angle, and the skirt radius is defined as a shortest distance from a radial outermost edge of the skirt to an axial center line of the tank body. ### Claim 3 (depends on 2) The hydrogen tank of claim 2, wherein the inclined portion has an inclined portion length, and wherein the inclined portion length extending in a sloped state has the same value as the extension portion length. ### Claim 4 (depends on 1) The hydrogen tank of claim 1, wherein the inclined portion is inclined at a second inclination angle with respect to the axial direction of the tank body, and wherein the second inclination angle is in a range of 1.3-1.7 times the first inclination angle. ### Claim 5 (depends on 1) The hydrogen tank of claim 1, wherein the hydrogen tank is positionable such that the axial direction of the tank body is horizontal, and the inclined portion is inclined toward an upper portion of the tank body. ### Claim 6 (depends on 5) The hydrogen tank of claim 5, wherein the hydrogen tank includes a marking portion that is mounted on an external surface of the tank body and is configured to distinguish between a top and a bottom of the hydrogen tank. ### Claim 7 (depends on 1) The hydrogen tank of claim 1, wherein the injection member includes: a plate connected to an end portion of the inclined portion and having a through-hole formed therein; and a diffusion guide extending from an edge of the plate and formed to spread out in a direction away from the plate. ### Claim 8 (depends on 7) The hydrogen tank of claim 7, wherein the diffusion guide is inclined so that an internal surface of the diffusion guide has a third inclination angle with respect to a surface of the plate, and wherein the third inclination angle has a range of 120-140°. ### Claim 9 (depends on 1) The hydrogen tank of claim 1, wherein the injection member includes: a connecting body connected to an end portion of the inclined portion; a main hole formed in an axial direction inside the connecting body; and a plurality of branch holes formed to be branched off and inclined from the main hole inside the connecting body. ### Claim 10 (depends on 9) The hydrogen tank of claim 9, wherein the plurality of branch holes are arranged at equal intervals in a circumferential direction of the connecting body. ### Claim 11 (depends on 9) The hydrogen tank of claim 9, wherein a branch hole of the plurality of branch holes is inclined at a fourth inclination angle having the same value as the first inclination angle with respect to an axial direction of the connecting body. ### Claim 12 A hydrogen tank comprising: a tank body; a boss connected to at least one end of the tank body and having a skirt extending radially with respect to an axial direction of the tank body; and a nozzle installed inside the tank body via the boss and configured to spray hydrogen gas at a predetermined angle with respect to the axial direction of the tank body, wherein the nozzle includes: a connector coupled to the boss; an extension portion extending from the connector parallel to the axial direction of the tank body; and a changing member provided at an end portion of the extension portion, wherein the extension portion has an orifice formed therein, wherein the changing member includes: a rod formed to be inserted into the orifice; and a diffuser plate fixedly coupled to an end portion of the rod, and wherein the rod includes a plurality of support protrusions spaced apart at equal intervals in a circumferential direction of the rod on the external surface of the rod and extending in a length direction of the rod. ### Claim 13 (depends on 12) The hydrogen tank of claim 12, wherein the orifice has an inner diameter gradually increasing toward an inside of the tank body. ### Claim 14 (depends on 13) The hydrogen tank of claim 13, wherein a spray flow path is defined between an external surface of the rod and an internal surface of the orifice. ### Claim 15 (depends on 12) The hydrogen tank of claim 12, wherein the rod is press-fitted and coupled to the orifice. ### Claim 16 A hydrogen tank comprising: a tank body; a boss connected to at least one end of the tank body and having a skirt extending radially with respect to an axial direction of the tank body; and a nozzle installed inside the tank body via the boss and configured to spray hydrogen gas at a predetermined angle with respect to the axial direction of the tank body, wherein the nozzle includes: a connector coupled to the boss; an extension portion extending from the connector parallel to the axial direction of the tank body; and a changing member provided at an end portion of the extension portion, wherein the extension portion has an orifice formed therein, wherein the changing member includes: a rod formed to be inserted into the orifice; and a diffuser plate fixedly coupled to an end portion of the rod, and wherein the diffuser plate is coupled to extend at a right angle with respect to a length direction of the rod, and the diffuser plate has an area larger than a cross-sectional area of the orifice.