Temperature Pressure Relief Device Alloy Discharge Passage
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Solution Overview
Problem
Existing temperature pressure relief devices for high-pressure gas storage in fuel cell electric vehicles face issues with flow-rate reduction and passage closure due to re-solidification of alloys during abnormal conditions like fire, leading to safety risks.
Innovation Solution
A temperature pressure relief device with a blocking part and support part that remain in specific states to control the connection and disconnection of high-pressure gas exhaust passages, ensuring stable release by maintaining a time difference between support part discharge and gas release, thereby reducing the risk of re-solidification-induced passage closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a molten alloy type temperature pressure relief device is used, then the device can release high-pressure gas when temperature reaches a predetermined level, but the alloy may re-solidify and narrow or close the flow passage causing safety accidents
Solution Approach 1:
The patent extracts the harmful alloy material from the gas flow passage. A separate discharge passage is provided that allows the molten alloy to be discharged from the housing without entering the gas flow passage. The alloy discharge passage is positioned such that molten alloy flows away from the gas release path, preventing re-solidification-induced passage closure while maintaining the temperature-responsive release function.
Solution Approach 2:
The patent segments the release function into two separate pathways: one for gas release and one for alloy discharge. The housing includes distinct passages for high-pressure gas and molten alloy, preventing mixing and re-solidification issues. This segmentation ensures that the alloy cannot block the gas flow passage after melting and discharge.
2Speed
If the alloy is discharged immediately upon melting, then the release mechanism operates quickly, but the gas release stability is compromised due to potential passage closure
Solution Approach 1:
The patent introduces a separate alloy discharge passage as an intermediary pathway that handles the molten alloy separately from the gas flow. This mediator allows the alloy to be discharged quickly upon melting without interfering with the gas release stability, as the alloy and gas travel through distinct channels that prevent interaction and re-solidification blockage.
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 device effectively reduces the risk of flow-rate reduction and passage closure, enhancing the stability of high-pressure gas release in vehicles or fuel storage systems by ensuring a controlled and stable release mechanism.
Implementation Method 1
The support part is maintained in a solid state at a reference temperature or less and is in a molten state at more than the reference temperature
Implementation Method 2
the blocking part may be moved in the first direction by a first reference distance or more by the high-pressure gas introduced through the inlet passage
Data Source
AI summary
A temperature pressure relief device includes a body including an inlet passage into which high-pressure gas is introduced, an interior passage extending from the inlet passage in a predetermined first direction, and a high-pressure gas exhaust passage that is formed between the inlet passage and a reference end that is a distal end of the interior passage in the first direction and that connects the interior passage to an outside, a blocking part disposed in the interior passage of the body and selectively placed in one of a blocking state or a connecting state, and a support part arranged between the blocking part and the reference end, in which the support part is maintained in a solid state at a reference temperature or less and is in a molten state at more than the reference temperature and discharged from the interior passage.