Hydrogen supply system

A hydrogen supply system configured to be mounted in a vehicle, the hydrogen supply system comprising:

• a hydrogen tank configured to store hydrogen;
• a common passage connected to the hydrogen tank and through which hydrogen being filled into the hydrogen tank and hydrogen supplied from the hydrogen tank flow;
• a filling passage connecting the common passage and a filling port of the vehicle and through which the hydrogen being filled into the hydrogen tank flows;
• a supply passage connecting the common passage and a hydrogen consumption device and through which the hydrogen supplied from the hydrogen tank flows;
• a pressure reducing valve disposed in the supply passage and configured to reduce a pressure of the hydrogen supplied from the hydrogen tank;
• a shut-off valve disposed in an upstream section of the supply passage relative to the pressure reducing valve and configured to allow the supply passage to be passable and shut off;
• a first pressure sensor disposed in a downstream section of the supply passage relative to the pressure reducing valve and configured to detect the pressure in the supply passage;
• and
• a controller connected to the first pressure sensor,
• wherein the controller is configured to perform:
• a monitoring process for monitoring the pressure detected by the first pressure sensor while a power switch of the vehicle is off;
• and
• a shut-off process for controlling the shut-off valve to shut off the supply passage when the detected pressure exceeds a predetermined value in the monitoring process.