Hydrogen leakage detection system

A hydrogen leakage detection system configured to detect a hydrogen leakage in a fuel cell system, the system comprising:

• an outer shell configured to accommodate a hydrogen flow section, including at least one device of a fuel cell or a hydrogen tank storing hydrogen to be supplied to the fuel cell;
• and a hydrogen piping section including a hydrogen pipe connected to the at least one device;
• a hydrogen sensor disposed within the outer shell;
• and
• a porous sheet disposed to delimit at least a part of a space within the outer shell, and allowing permeation of hydrogen through the porous sheet in a thickness direction thereof, wherein
• the hydrogen flow section is disposed in a region below the porous sheet, and the hydrogen sensor is disposed in a region above the porous sheet;
• wherein
• the hydrogen leakage detection system is mounted on a fuel cell vehicle,
• the outer shell is a front compartment of the fuel cell vehicle, and
• the hydrogen sensor is secured to a portion of an inner wall of the front compartment other than a front hood that is configured to open and close the front compartment.