Passive temperature supervision device for a compressed gas fuel tank
AssigneeGM Global Technology Operations LLC
InventorsChristian Sachs, Holger Winkelmann
Life of this patent
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Abstract
Passive temperature supervision devices for detecting temperature changes in compressed gaseous fuel storage systems of fuel cell systems. More specifically, systems and methods for detecting temperature changes in compressed gaseous fuel storage systems such as compressed gaseous fuel tanks of motor vehicles, where increases and decreases in temperature can be detected without the need for electric supervision systems.
Claims20
A passive temperature supervision device for detecting a temperature change in a compressed gaseous fuel storage system of a fuel cell system, the device configured to be coupled to a compressed gas tank and configured to passively detect the change in an internal temperature of the compressed gas tank by an irreversible change in at least one physical property of the passive temperature supervision device.
A system for detecting a temperature change in a compressed gaseous fuel storage system of a fuel cell system comprising:
- a passive temperature supervision device coupled to a compressed gas tank and configured to passively detect the change in an internal temperature of the compressed gas tank by an irreversible change in at least one physical property of the passive temperature supervision device;
- a controller coupled to the passive temperature supervision device and configured to check a circuit for conductivity and to send an error message to a dashboard of a vehicle to inform a user to bring the vehicle in for service when a change of conductivity has been detected indicating the circuit is broken;
- and
- a display located on the dashboard of the vehicle configured to display the error message to the user.
A method for detecting a temperature change in a compressed gaseous fuel storage system of a fuel cell system, the method comprising:
- providing a system comprising:
- a passive temperature supervision device coupled to a compressed gas tank and configured to passively detect the change in an internal temperature of the compressed gas tank by an irreversible change in at least one physical property of the a passive temperature supervision device;
- a controller coupled to the passive temperature supervision device and configured to check a circuit for conductivity and to send an error message to a dashboard of a car to inform a user to bring a vehicle in for service when a change of conductivity has been detected indicating the circuit is broken;
- and
- a display located on the dashboard of a vehicle configured to display the error message to the user;
- detecting the change in the internal temperature of the compressed gas tank through a change in the at least one physical property of the passive temperature supervision device;
- checking the circuit for conductivity using the controller;
- sending the error message to the dashboard of the vehicle to inform a user to bring the vehicle in for service when a change of conductivity has been detected indicating the circuit is broken.
Dependencies are inferred from the claim text.