Hydrogen Fuel Filling System with Mass Flow Validation
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Solution Overview
Problem
Existing fuel filling systems for hydrogen tanks in fuel cell vehicles face challenges in accurately determining the validity of information sent from vehicles, leading to measurement errors and inappropriate filling control laws, which can result in inefficient refilling and potential temperature rises during the filling process.
Innovation Solution
A fuel filling system that includes a vehicle with a transmitter and an external filling device, utilizing a mass flow meter to calculate the filling amount and determine if the difference between the calculated and measured filling amounts is within a permissible range, allowing for adjustment of the filling control law to ensure accurate information validation and safe filling processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the predicted temperature is calculated using a predictive arithmetic expression based on energy conservation law, then the validity of information from the vehicle can be determined, but the measurement error in the predicted temperature is great and the determination accuracy is low
Solution Approach 1:
The system uses feedback from the mass flow meter to continuously monitor and verify the filling amount. By comparing the filling amount calculated from vehicle sensor data with the actual filling amount measured by the mass flow meter, the system can determine the validity of the vehicle's information and adjust the filling control accordingly, resolving the contradiction between prediction accuracy and determination reliability.
Solution Approach 2:
The patent replaces the theoretical predictive calculation method with a direct measurement method using a mass flow meter. Instead of relying on energy conservation calculations that have large measurement errors, the system uses direct mass flow measurement to accurately determine the filling amount, thereby improving both temperature prediction accuracy and information validity determination accuracy.
2Productivity
If the filling flowrate is increased to refill quickly, then the productivity is improved, but the temperature of fuel in the hydrogen tank rises excessively
Solution Approach 1:
The system dynamically adjusts the filling flowrate based on real-time feedback from the mass flow meter and temperature sensors. By continuously monitoring the actual filling amount and temperature, the system can increase the flowrate when safe and reduce it when temperature approaches dangerous levels, thereby achieving both high productivity and temperature control.
Solution Approach 2:
The system uses feedback from temperature sensors and mass flow meters to continuously monitor filling conditions. This feedback mechanism allows the control unit to adjust the filling flowrate in real-time, preventing excessive temperature rise while maintaining high refilling speed through adaptive control.
3Adaptability or versatility
If the filling control law is changed frequently based on predicted temperature, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The system uses feedback from the mass flow meter to verify the actual filling amount and adjust the filling control law accordingly. This feedback mechanism provides adaptability by allowing the system to respond to actual conditions rather than relying on inaccurate predictions, while the structured feedback loop keeps the control logic manageable and not excessively complex.
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
This approach enables accurate determination of the validity of information sent from vehicles, reducing measurement errors and preventing excessive temperature rises, thus ensuring efficient and safe refilling of hydrogen tanks.
Implementation Method 1
calculating a filling amount of fuel in the determination period, using a mass flow meter provided to the external filling device
Implementation Method 2
Fuel cell vehicles travel by supplying oxygenated air and hydrogen to the fuel cell, and driving an electric motor using the electric power thereby generated
Implementation Method 3
vehicles have become mainstream that store a sufficient amount of hydrogen in advance in a high-pressure tank or a hydrogen tank
Implementation Method 4
Sensors that detect the temperature and/or pressure of the hydrogen gas inside the hydrogen tank, for example, are provided to the hydrogen tank
Data Source
AI summary
The present invention provides a fuel filling system and a fuel filling method thereof that can determine the validity of information transmitted from a vehicle side while filling fuel with high accuracy. A hydrogen gas filling method of a hydrogen filling system includes: a step of filling hydrogen gas from a hydrogen station to a hydrogen tank under a predetermined filling control law (S2); and a determination step of determining whether a measurement error parameter corresponding to a difference between a filling amount of hydrogen gas calculated using information transmitted from the vehicle side and a filling amount of hydrogen gas calculated using a mass flow meter is within a predetermined permissible range (S9). In the filling step, the filling control law is changed after starting the filling of hydrogen gas, according to a determination result obtained in the determination step (S13 and S16).