Fuel Cell Hydrogen Exhaust Dome Protector
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Solution Overview
Problem
Current hydrogen storage systems in fuel cell vehicles face challenges in safely and compactly storing hydrogen due to its low volume energy density, with hydrogen permeation through plastic liners posing safety concerns and difficulty in quantitative measurement.
Innovation Solution
A hydrogen exhaust apparatus with a dome protector having a flow path and outlet is designed to collect and safely discharge permeated hydrogen, using concentric and radial flow paths to quantify and dilute the hydrogen before discharge through an exhaust pipe, ensuring safe handling and measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a plastic liner is used in the hydrogen storage tank, then the tank weight is reduced and manufacturing is easier, but hydrogen permeation occurs creating safety concerns
Solution Approach 1:
The invention extracts the permeated hydrogen from the storage system by providing a dedicated collection space (annular region between inner and outer domes) and discharge path, separating the permeation problem from the storage function and enabling controlled removal of hydrogen that penetrates the liner.
Solution Approach 2:
The invention introduces an intermediary discharge system consisting of the second dome, flow path, and discharge hole that mediates between the permeated hydrogen and the external environment, allowing controlled discharge rather than uncontrolled leakage, thus maintaining safety while using plastic liners.
2Reliability
If hydrogen is discharged directly to the air, then the safety concern is addressed, but the amount of hydrogen discharged cannot be quantitatively measured
Solution Approach 1:
The invention establishes a feedback mechanism by creating a controlled discharge path that allows both safe hydrogen removal and potential measurement of discharge amounts, enabling monitoring and adjustment of the hydrogen management system based on actual permeation rates.
Solution Approach 2:
The discharge system serves multiple functions: it provides safe hydrogen discharge, enables quantitative measurement of permeation, and allows for system diagnostics, making the safety mechanism multi-functional rather than solely for hazard mitigation.
3Reliability
If the dome protector is modified to include flow paths and outlets, then hydrogen can be collected and discharged safely, but the device complexity increases
Solution Approach 1:
The invention merges the hydrogen collection function with the existing dome protector structure by forming the second dome and flow paths within the protective dome assembly, combining structural protection with hydrogen management functions in a single integrated component rather than adding separate systems.
Solution Approach 2:
The invention implements a nested structure where the flow path is formed within the dome protector volume, and the hydrogen collection space is nested between the inner and outer domes, utilizing existing structural spaces for multiple functions and minimizing additional material requirements.
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 apparatus effectively quantifies and safely processes permeated hydrogen, enhancing safety by diluting it with air before discharge, addressing the challenges of hydrogen permeation and storage in fuel cell vehicles.
Implementation Method 1
the type 4 tank utilizes a plastic liner, resulting in a hydrogen transmission problem
Implementation Method 2
The hydrogen discharged through the outlet may be mixed with air within the exhaust pipe, may be diluted, and may be discharged to the air
Data Source
AI summary
An apparatus is provided for safely discharging hydrogen permeated and leaking from a fuel tank of a fuel cell vehicle. The hydrogen exhaust apparatus for a fuel cell vehicle collects and safely processes hydrogen permeating a tank, and quantitatively detects the hydrogen transmissive amount. Thus the apparatus has improved a shape and attachment manner of a dome protector mounted in a hydrogen fuel tank. The safety aspect of hydrogen discharged to the air is improved, and an active response to various controls by quantitatively detecting the hydrogen transmissive amount is implemented.