Hydrogen Regulator Pressure-Slope Control to Prevent Charging Noise
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Solution Overview
Problem
Fuel cell electric vehicles (FCEVs) experience noise generation from high-pressure regulators due to poor pressure reduction performance, causing user anxiety during hydrogen charging.
Innovation Solution
A hydrogen storage system with a detection device and processor that monitors hydrogen pressure changes to predict noise generation, controlling hydrogen charging based on pressure slopes and thresholds, using solenoid valves and noise meters to prevent noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hydrogen charging is performed using a high-pressure regulator, then hydrogen can be supplied to the fuel cell stack, but noise is generated at the regulator causing user anxiety
Solution Approach 1:
The control device predicts noise generation by monitoring the pressure slope before it actually occurs. When the pressure slope exceeds a threshold, the system proactively stops charging before the noise is generated, preventing the harmful effect rather than reacting to it after occurrence.
Solution Approach 2:
The system continuously monitors the pressure slope during hydrogen charging and uses this feedback to predict when noise will occur. Based on this real-time feedback, the control device dynamically adjusts or stops charging to prevent noise generation while maximizing charging efficiency when conditions are favorable.
2Reliability
If a pressure relief valve is mounted to prevent overpressure, then safety is improved, but the system complexity increases
Solution Approach 1:
The control device uses the existing pressure sensor data and processing capabilities already present in the hydrogen storage system to predict and prevent noise generation. This self-service approach leverages existing system resources rather than adding dedicated new components, thereby avoiding increased system complexity.
3Object-affected harmful factors
If hydrogen charging is stopped early to prevent noise, then noise generation is prevented, but charging time increases
Solution Approach 1:
The system monitors the pressure slope parameter during charging and dynamically adjusts charging based on its value. When the pressure slope remains below the threshold, charging continues at full speed. When the threshold is exceeded, charging is stopped to prevent noise. This parameter-based control optimizes the balance between charging speed and noise prevention.
Data Source
AI summary
A hydrogen storage system and a method for controlling the same includes a detection device that detects a first hydrogen pressure decompressed by a regulator using a first pressure sensor in the hydrogen storage system and a processor that predicts generation of noise at the regulator based on a change rate of the first hydrogen pressure during hydrogen charging and stops the hydrogen charging.