Type V Pressure Vessel With Plasma-Deposited Gas Barrier
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Solution Overview
Problem
Existing Type V pressure vessels face challenges in achieving gas-tightness without reducing storage volume, increasing weight, or requiring lengthy application processes, and are not compatible with all pressure vessel structures.
Innovation Solution
A Type V pressure vessel design featuring a plasma-based metal deposition process for a thin gas barrier layer, coupled with a modular boss assembly, allowing for efficient assembly and compatibility with various structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin material layer is used to prevent gas permeation, then gas-tightness is improved, but storage volume is reduced and weight increases
Solution Approach 1:
The invention changes the material parameter from resin to metal (aluminum, titanium, or their alloys) and reduces the thickness parameter from micrometers to nanometers (5-100 nm), achieving the same gas barrier function with dramatically reduced volume occupation
Solution Approach 2:
The invention uses composite structure by depositing a thin metal gas barrier layer on the inner surface of the composite pressure vessel, combining the structural integrity of composite materials with the gas barrier properties of metal
2Reliability
If a resin material layer is used to prevent gas permeation, then gas-tightness is improved, but weight increases
Solution Approach 1:
The invention changes the material density parameter by replacing resin with lightweight metals (aluminum density 2.7 g/cm³ or titanium density 4.5 g/cm³) and reduces the thickness parameter to 5-100 nm, achieving gas-tightness with minimal weight addition
Solution Approach 2:
The gas barrier function is applied locally only where needed (inner surface of the pressure vessel) using a thin metal layer, rather than using a thick resin layer throughout, reducing overall weight
3Reliability
If resin material is used to cover the inner surface, then gas-tightness is improved, but manufacturing time increases
Solution Approach 1:
The invention replaces the mechanical application process of resin coating with a plasma-based physical vapor deposition process, which deposits metal atoms directly onto the inner surface, significantly reducing application time
Solution Approach 2:
The plasma-based deposition process utilizes phase transitions of metal material from vapor state to solid state on the inner surface, enabling rapid and uniform coating formation
4Reliability
If a diffusion barrier layer is used, then gas permeation is prevented, but the solution is not compatible with all pressure vessel structures
Solution Approach 1:
The plasma-based metal deposition process is designed to be universally applicable to different pressure vessel structures (one-piece or multi-piece reinforced bodies), making the gas barrier solution adaptable to various vessel configurations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a gas-tight pressure vessel with reduced weight and manufacturing time, maintaining storage volume, and flexibility in structure compatibility.
Implementation Method 1
a first gas barrier metal layer made from a first metallic material deposited on the first inner surface using a plasma-based metal deposition process
Data Source
Figure 1~2a
Figure 2b~3
Figure 4a~4c
AI summary
Type V pressure vessel having a gas barrier metal layer Type V pressure vessel (1) comprising an external composite structure (10) enclosing or encasing an internal composite structure (20), wherein the internal composite structure (20) comprises a first inner surface (21) defining an internal gas storage chamber (30), a first gas barrier metal layer (22) made from a first metallic material deposited on the first inner surface (21) using a plasma-based metal deposition process, a cylindrical central part (24), and a boss assembly (23) coupled to the cylindrical central part (24) by means of a first coupling means, the boss assembly (23) comprises a dome-shaped cap (26) and a boss part (25) coupled to the dome-shaped cap (26) by means of a second coupling means.