Hydrogen Sensor Cover Venting for Fuel Cell Anode Gas
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Solution Overview
Problem
In fuel cell vehicles, hydrogen sensors exposed to high concentration hydrogen gas for prolonged periods due to residual gas retention in the cover member after system shutdown, leading to sensor deterioration.
Innovation Solution
A gas collection cover with a recessed shape and ventilation through-holes is designed to collect and discharge hydrogen gas, ensuring rapid reduction of hydrogen concentration near the sensor, preventing prolonged exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover member opening downward is used to detect hydrogen leakage, then hydrogen gas can be detected when leakage occurs, but high concentration hydrogen gas remains in the cover member for an extended period causing sensor deterioration
Solution Approach 1:
The cover member is divided into an upper cover portion and a lower cover portion that can rotate relative to each other. This segmentation allows the sensor to be isolated from hydrogen gas by rotating the lower cover portion to a closed position, preventing prolonged exposure while maintaining detection capability when needed
Solution Approach 2:
The lower cover portion is made rotatable around the sensor, transforming the static cover into a dynamic structure. This allows the system to switch between open and closed states, controlling hydrogen gas access to the sensor based on detection needs while preventing prolonged exposure
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
Prevents hydrogen gas from remaining inside the cover for extended periods, maintaining sensor integrity and enhancing ventilation efficiency.
Implementation Method 1
a hydrogen sensor configured to detect a hydrogen gas contained in the anode gas
Implementation Method 2
When hydrogen gas leakage occurs, the rising hydrogen gas inside the cover member is detected by the hydrogen sensor located at the uppermost portion
Data Source
AI summary
A fuel cell apparatus including a fuel cell, a piping unit including a gas supply path for anode gas and a gas discharge path for anode gas, a hydrogen sensor detecting a hydrogen gas contained in the anode gas, and a gas collection cover covering an upper side of the piping unit and forming a storage space having a recessed shape toward the upper side. The gas collection cover includes a side wall covering a periphery of the storage space, and an upper wall closing an opening at an upper end portion of the side wall, the upper wall has a recessed portion formed in a recessed shape toward the upper side, and is provided with a through-hole around the recessed portion communicating the storage space with an external space, and the hydrogen sensor is provided at a bottom portion of the recessed portion.