Systems and methods for hydrogen leak detection

A method of detecting a hydrogen leak in a powertrain or vehicle, comprising:

• measuring one or more thermodynamic properties of hydrogen in a hydrogen storage system before the powertrain or vehicle is shutdown,
• detecting a first mass of hydrogen in the hydrogen storage system before the powertrain or vehicle is shutdown based on the one or more thermodynamic properties of hydrogen in the hydrogen storage system before the powertrain or vehicle is shutdown,
• measuring the one or more thermodynamic properties of hydrogen in the hydrogen storage system after the powertrain or vehicle is restarted,
• detecting a second mass of hydrogen in the hydrogen storage system after the powertrain or vehicle is restarted based on the one or more thermodynamic properties of hydrogen in the hydrogen storage system after the powertrain or vehicle is restarted,
• calculating a hydrogen mass leak rate of a hydrogen leak in the powertrain or vehicle,
• waiting for a calibrated amount of delay time before detecting the hydrogen leak in the powertrain or vehicle,
• measuring a wake-up time against the calibrated amount of delay time to determine whether to detect the hydrogen leak in the powertrain or vehicle, wherein the wake-up time is a difference between a current time and a time of wake-up of the powertrain or vehicle, and
• preventing damage to the vehicle or powertrain when there is the hydrogen leak.