Pressure vessel system

A method for operating a pressure vessel system (21) having a plurality of pressure vessels (19), which delimit interior spaces (27) as pressure detection spaces (31), for a motor vehicle (37), said method comprising the following steps:

• introducing a fluid, as fuel, through at least one fluid opening (26) into at least one pressure vessel (19) by opening at least one shut-off element (34, 35) for the at least one fluid opening (26) so that the interior space (27) of the at least one pressure vessel (19) is filled with the fluid,
• releasing the fluid as fuel through the at least one fluid opening (26) from the at least one pressure vessel (19) by opening the at least one shut-off element (34, 35) for the at least one fluid opening (26), so that the interior space (27) of the at least one pressure vessel (19) is emptied of the fluid,
• storing the fluid in the interior spaces (27) of the pressure vessels (19) by the shut-off elements (34, 35) of the fluid openings (26) of the pressure vessels (19) remaining closed during a storage period,
• detecting a pressure of the interior space (27) of the pressure vessel (19) using a pressure sensor (32),
• determining a leak in the pressure vessel system (21) using data detected by the pressure sensor (32) via a computer unit (36),
• wherein
• the closing elements (34, 35), which are necessary for closing at least two pressure detection spaces (31), are always closed during the storage period and, during said storage period, the pressure of the fluid in the at least two pressure detection spaces (31) is detected in these at least two pressure detection spaces (31), and a leak in the pressure vessel system (21) is detected depending on the pressure data for the fluid in the at least two different pressure detection spaces (31), which data can be detected by the at least two pressure sensors (32).