Fuel-Cell Vehicle Ignition Shutdown During Hydrogen Charging
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Solution Overview
Problem
Current safety control systems for fuel-cell vehicles fail to systematically restrict vehicle ignition during hydrogen charging, violating regulations that require the propulsion system to be inactive and the vehicle stationary during fuel charging.
Innovation Solution
A charging safety control system and method that includes a charging switch, vehicle speed detector, and controller to switch off the vehicle's ignition when stopped and during hydrogen charging, with optional communication and tank pressure detection to ensure compliance with safety regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional ignition control logic is applied to fuel-cell vehicles, then the vehicle can operate freely during charging, but safety regulations requiring ignition shutdown during hydrogen charging are violated
Solution Approach 1:
The controller receives feedback signals from a charging detector that monitors whether hydrogen charging is in progress, and automatically adjusts ignition control based on this feedback. When charging is detected, the controller shuts down the ignition system; when charging is not detected, normal ignition control is restored.
Solution Approach 2:
The system performs preliminary detection of charging status before allowing ignition operation. The charging detector continuously monitors for charging conditions in advance, and the controller is pre-programmed with safety protocols to shut down ignition automatically when charging is detected, preventing safety violations before they occur.
2Device complexity
If no charging detection device is installed, then the vehicle system remains simple, but systematic ignition restriction during fuel charging cannot be implemented
Solution Approach 1:
A charging detector is introduced as an intermediary device between the charging system and the ignition control system. This detector monitors charging status and transmits signals to the controller, enabling automatic ignition restriction during charging without requiring complex direct integration between charging and ignition systems.
3Productivity
If ignition is not shut off during hydrogen charging, then vehicle productivity is maintained, but safety hazards increase due to potential ignition sources during fuel charging
Solution Approach 1:
The system applies preliminary anti-action by detecting charging status in advance and automatically shutting down the ignition system before any potential ignition hazard can occur. This preventive measure eliminates ignition sources during hydrogen charging, counteracting the inherent safety hazard of having active ignition systems during fuel charging operations.
Data Source
AI summary
Disclosed is charging safety control system for a fuel-cell vehicle. In particular, a charging switch is provided in a fuel-cell vehicle to be manipulated in hydrogen charging as well as a vehicle speed detector for detecting a current vehicle speed. A controller within the vehicle is configured to receiving a signal corresponding to on/off-manipulation of the charging switch and a detected current vehicle speed and control the ignition of the vehicle based thereon. Particularly, the controller is configured to switch off the ignition of the vehicle upon receiving the on-manipulation signal of the charging switch, and upon determining that the vehicle is stopped based on the current vehicle speed.