High pressure tank apparatus and method of leakage judgment of same

A method of leakage judgment of a high pressure tank apparatus that comprises a high pressure tank and in which a fluid is supplied/discharged to/from a resin-made liner of the high pressure tank via a supplying/discharging flow path,

• the high pressure tank comprising:
• a reinforced layer covering an outer surface of the liner;
• and a supplying/discharging hole that communicates the supplying/discharging flow path and an inside of the liner, and
• the high pressure tank apparatus comprising:
• a storage section capable of storing a leaked fluid and a temporary release fluid, the leaked fluid being the fluid that has leaked from at least a connecting section of the supplying/discharging flow path and the supplying/discharging hole, and the temporary release fluid being the fluid that has been led out to outside of the high pressure tank from between the liner and the reinforced layer;
• a concentration sensor that detects a concentration of the fluid inside the storage section;
• a pressure sensor that detects an internal pressure of the high pressure tank;
• and a control section that judges whether or not the leaked fluid has occurred,
• the method of leakage judgment including:
• a comparing step where an internal pressure detection value due to the pressure sensor and a sensor selection threshold value are compared;
• and
• a judging step where in the case where the internal pressure detection value is greater than the sensor selection threshold value, it is judged whether or not the leaked fluid has occurred, based on a detection result of the concentration sensor, and in the case where the internal pressure detection value is less than or equal to the sensor selection threshold value, it is judged whether or not the leaked fluid has occurred, based on a detection result of the pressure sensor.